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                                                                     EXHIBIT 4.2

                                  SCHEDULE A

                         EXCHANGEABLE SHARE PROVISIONS

     The non-voting exchangeable shares of the Corporation shall have the
following rights, privileges, restrictions and conditions:

                                  ARTICLE 1
                                INTERPRETATION

1.1  For the purpose of these share provisions:

     "Affiliate" of any Person means any other Person directly or indirectly
     controlling, controlled by, or under common control of, that Person. For
     the purposes of this definition, "control" (including, with correlative
     meanings, the terms "controlled by" and "under common control of"), as
     applied to any Person, means the possession by another Person, directly or
     indirectly, of the power to direct or cause the direction of the management
     and policies of that first-mentioned Person, whether through the ownership
     of voting securities, by contract or otherwise.

     "Board of Directors" means the board of directors of the Corporation.

     "Business Day" means any day on which commercial banks are open for
     business in Toronto, Ontario, and New York, New York, other than a
     Saturday, a Sunday or a day observed as a holiday in Toronto, Ontario,
     under the laws of the Province of Ontario or the federal laws of Canada or
     in New York, New York, under the laws of the State of New York or the
     federal laws of the United States of America.

     "Call Rights" means the Liquidation Call Right, the Redemption Call Right
     and the Retraction Call Right, collectively.

     "Canadian Dollar Equivalent" means, in respect of an amount expressed in a
     currency other than Canadian dollars (the "Foreign Currency Amount") at any
     date, the product obtained by multiplying (i) the Foreign Currency Amount,
     and (ii) the noon spot exchange rate on such date for such foreign currency
     expressed in Canadian dollars as reported by the Bank of Canada or, if such
     noon spot exchange rate is not available, such spot exchange rate on such
     date for such foreign currency expressed in Canadian dollars as may be
     deemed by the Board of Directors to be appropriate for such purpose.

     "Company Liquidation Amount" has the meaning ascribed thereto in Section
     5.1 of these share provisions.

     "Company Liquidation Date" has the meaning ascribed thereto in Section 5.1
     of these share provisions.

     "Current Market Price" means, in respect of a share of SMTC Common Stock on
     any date, the Canadian Dollar Equivalent of the average of the closing bid
     and ask prices of the SMTC Common Stock during a period of 20 consecutive
     trading days ending not more than three trading days before such date on
     Nasdaq, or, if the shares of SMTC Common Stock are not then quoted on
     Nasdaq, on such other stock exchange or

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     automated quotation system on which shares of SMTC Common Stock are listed
     or quoted, as the case may be, as may be selected by the Board of Directors
     for such purpose; provided, however, that if in the opinion of the Board of
     Directors the public distribution or trading activity of SMTC Common Stock
     during such period does not create a market that reflects the fair market
     value of SMTC Common Stock, then the Current Market Price of a share of
     SMTC Common Stock shall be determined by the Board of Directors, in good
     faith and in its sole discretion; and provided further that any such
     selection, opinion or determination by the Board of Directors shall be
     conclusive and binding.

     "Dividend Amount" means, at any date with respect to any Exchangeable
     Share, the full amount of all dividends, if any, declared and unpaid on
     each such Exchangeable Share held by a holder on any dividend record date
     which occurred prior to such date.

     "Exchangeable Shares" means the non-voting exchangeable shares in the
     capital of the Corporation having the rights, privileges, restrictions and
     conditions set forth in these share provisions.

     "Exchangeable Share Support Agreement" means that certain exchangeable
     share support agreement made as of July 27, 2000 between SMTC, SMTC Nova
     Scotia and the Corporation.

     "Exchangeable Share Voting Event" means any matter in respect of which
     holders of Exchangeable Shares are entitled to vote as shareholders of the
     Corporation, other than an Exempt Exchangeable Share Voting Event, and, for
     greater certainty, excluding any matter in respect of which holders of
     Exchangeable Shares are entitled to vote (or instruct the Trustee to vote)
     in their capacity as Beneficiaries under (and as that term is defined in)
     the Voting and Exchange Trust Agreement.

     "Exempt Exchangeable Share Voting Event" means any matter in respect of
     which holders of Exchangeable Shares are entitled to vote as shareholders
     of the Corporation in order to approve or disapprove, as applicable, any
     change to, or in the rights of the holders of, the Exchangeable Shares,
     where the approval or disapproval, as applicable, of such change would be
     required to maintain the equivalence of the Exchangeable Shares and the
     shares of SMTC Common Stock.

     "Liquidation Call Purchase Price" has the meaning ascribed thereto in
     Section 5.4 of these share provisions.

     "Liquidation Call Right" has the meaning ascribed thereto in Section 5.4 of
     these share provisions.

     "Nasdaq" means the Nasdaq National Market.

     "OBCA" means the Business Corporations Act (Ontario) as now in effect and
     as it may be amended from time to time.

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     "Person" includes any individual, firm, partnership, joint venture, venture
     capital fund, limited liability company, unlimited liability company,
     association, trust, trustee, executor, administrator, legal personal
     representative, estate, group, body corporate, corporation, unincorporated
     association or organization, syndicate or other entity, whether or not
     having legal status.

     "Purchase Price" has the meaning ascribed thereto in Section 6.3 of these
     share provisions.

     "Redemption Call Purchase Price" has the meaning ascribed thereto in
     Section 7.4 of these share provisions.

     "Redemption Call Right" has the meaning ascribed thereto in Section 7.4 of
     these share provisions.

     "Redemption Date" means the date, if any, established by the Board of
     Directors for the redemption by the Corporation of all but not less than
     all of the outstanding Exchangeable Shares pursuant to Article 7 of these
     share provisions, which date shall be no earlier than July 27, 2015,
     unless:

     (i)   there are fewer than 500,000 Exchangeable Shares outstanding (other
           than Exchangeable Shares held by SMTC and its Affiliates), as such
           number of shares may be adjusted by the Board of Directors to give
           effect to any subdivision or consolidation of or stock dividend on
           the Exchangeable Shares, any issue or distribution of rights to
           acquire Exchangeable Shares or securities exchangeable for or
           convertible into Exchangeable Shares, any issue or distribution of
           other securities or rights or evidences of indebtedness, or assets,
           or any other capital reorganization or other transaction affecting
           the Exchangeable Shares, in which case the Board of Directors may
           accelerate such redemption date to such date prior to July 27, 2015
           as it may determine upon at least 60 days' prior written notice to
           the registered holders of the Exchangeable Shares and the Trustee;

     (ii)  an SMTC Control Transaction occurs, in which case, provided that the
           Board of Directors determines, in good faith and in its sole
           discretion, that it is not reasonably practicable to substantially
           replicate the terms and conditions of the Exchangeable Shares in
           connection with such SMTC Control Transaction and that the redemption
           of all but not less than all of the outstanding Exchangeable Shares
           is necessary to enable the completion of such SMTC Control
           Transaction in accordance with its terms, the Board of Directors may
           accelerate such redemption date to such date prior to July 27, 2015
           as it may determine upon such number of days' prior written notice to
           the registered holders of the Exchangeable Shares and the Trustee as
           the Board of Directors may determine to be reasonably practicable in
           such circumstances;

     (iii) an Exchangeable Share Voting Event is proposed, in which case,
           provided that the Board of Directors has determined, in good faith
           and in its sole discretion,

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           that it is not reasonably practicable to accomplish the business
           purpose intended by the Exchangeable Share Voting Event, which
           business purpose must be bona fide and not for the primary purpose of
           causing the occurrence of a Redemption Date, in any other
           commercially reasonable manner that does not result in an
           Exchangeable Share Voting Event, the Redemption Date shall be the
           Business Day prior to the record date for any meeting or vote of the
           holders of the Exchangeable Shares to consider the Exchangeable Share
           Voting Event, and the Board of Directors shall give such number of
           days' prior written notice of such redemption to the registered
           holders of Exchangeable Shares and the Trustee as it may determine to
           be reasonably practicable in such circumstances; or

     (iv)  an Exempt Exchangeable Share Voting Event is proposed and the holders
           of the Exchangeable Shares fail to take the necessary action at a
           meeting or other vote of holders of Exchangeable Shares to approve or
           disapprove, as applicable, the Exempt Exchangeable Share Voting
           Event, in which case the Redemption Date shall be the Business Day
           following the day on which the holders of the Exchangeable Shares
           failed to take such action, and the Board of Directors shall give
           such number of days' prior written notice of such redemption to the
           registered holders of the Exchangeable Shares and the Trustee as it
           may determine to be reasonably practicable in such circumstances;

     provided, however, that the accidental failure or omission to give any
     notice of redemption under clause (i), (ii), (iii) or (iv) above to less
     than 10% of such holders of Exchangeable Shares shall not affect the
     validity of any such redemption.

     "Redemption Price" has the meaning ascribed thereto in Section 7.1 of these
     share provisions.

     "Retracted Shares" has the meaning ascribed thereto in Section 6.1(a) of
     these share provisions.

     "Retraction Call Right" has the meaning ascribed thereto in Section 6.1(c)
     of these share provisions.

     "Retraction Date" means, subject to Section 6.1(b), the Business Day on
     which a holder of Exchangeable Shares desires to have the Corporation
     redeem the Retracted Shares as set out in these share provisions, which
     date shall not be less than 10 Business Days, nor more than 15 Business
     Days, after the date on which the Retraction Request is received by the
     Corporation.

     "Retraction Price" has the meaning ascribed thereto in Section 6.1 of these
     share provisions.

     "Retraction Request" has the meaning ascribed thereto in Section 6.1 of
     these share provisions.

     "SMTC" means SMTC Corporation, a corporation existing under the laws of the
     State of Delaware, and any successor corporation thereto.

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     "SMTC Common Stock" means the shares of common stock, par value US$0.01, in
     the capital of SMTC, and any other securities into which such shares may be
     changed, including shares into which SMTC Common Stock may be changed
     consequent upon an amalgamation, merger, reorganization or other
     transaction affecting the SMTC Common Stock.

     "SMTC Control Transaction" means any merger, amalgamation, tender offer,
     material sale of shares or rights or interests therein or thereto or
     similar transactions involving, for or by SMTC, or any proposal to take any
     such action.

     "SMTC Dividend Declaration Date" means the date on which the board of
     directors of SMTC declares any dividend on the SMTC Common Stock.

     "SMTC Nova Scotia" means SMTC Nova Scotia Company, an unlimited company
     existing under the laws of the Province of Nova Scotia and a wholly-owned
     subsidiary of SMTC.

     "Subdivision" has the meaning ascribed thereto in Section 3.2 of these
     share provisions.

     "SMTC Nova Scotia Call Notice" has the meaning ascribed thereto in Section
     6.3 of these share provisions.

     "Transfer Agent" means CIBC Mellon Trust Company or such other Person as
     may from time to time be appointed by the Corporation as the registrar and
     transfer agent for the Exchangeable Shares.

     "Trustee" means CIBC Mellon Trust Company or such other Person as may from
     time to time be appointed as the trustee under the Voting and Exchange
     Trust Agreement, being a corporation organized and existing under the laws
     of Canada and authorized to carry on the business of a trust company in all
     the provinces of Canada, and any successor trustee appointed under the
     Voting and Exchange Trust Agreement.

     "Voting and Exchange Trust Agreement" means that certain voting and
     exchange trust agreement entered into between SMTC, SMTC Nova Scotia, the
     Corporation and the Trustee on July 27, 2000.

                                   ARTICLE 2
                        RANKING OF EXCHANGEABLE SHARES

2.1  The Exchangeable Shares shall be entitled to a preference over the common
shares of the Corporation and any other shares ranking junior to the
Exchangeable Shares with respect to the payment of dividends and the
distribution of assets in the event of the liquidation, dissolution or winding-
up of the Corporation, whether voluntary or involuntary, or any other
distribution of the assets of the Corporation among its shareholders for the
purpose of winding-up its affairs. The Exchangeable Shares will rank junior to
the Class C preferred shares of the Corporation and any other shares ranking
prior to the Exchangeable Shares.

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                                   ARTICLE 3
                                   DIVIDENDS

3.1  Subject to Section 3.2 below, a holder of an Exchangeable Share shall be
entitled to receive and the Board of Directors shall, subject to applicable law,
on each SMTC Dividend Declaration Date, declare a dividend on each Exchangeable
Share:

     (a)  in the case of a cash dividend declared on the SMTC Common Stock, in
          an amount in cash for each Exchangeable Share in U.S. dollars, or, at
          the option of the Corporation, the Canadian Dollar Equivalent thereof
          on the SMTC Dividend Declaration Date, in each case, corresponding to
          the cash dividend declared on each share of SMTC Common Stock;

     (b)  in the case of a stock dividend declared on the SMTC Common Stock to
          be paid in SMTC Common Stock, in such number of Exchangeable Shares
          for each Exchangeable Share as is equal to the number of shares of
          SMTC Common Stock to be paid on each share of SMTC Common Stock; or

     (c)  in the case of a dividend declared on the SMTC Common Stock in
          property other than cash or SMTC Common Stock, in such type and amount
          of property for each Exchangeable Share as is the same as or
          economically equivalent to (as determined by the Board of Directors
          and as contemplated by Section 3.6 hereof) the type and amount of
          property declared as a dividend on each share of SMTC Common Stock.

3.2  In the case of a stock dividend declared on the SMTC Common Stock to be
paid in SMTC Common Stock, in lieu of declaring a corresponding stock dividend
on the Exchangeable Shares (as contemplated by Section 3.1(b) hereof), the Board
of Directors may, by resolution, in its discretion and subject to applicable
law, subdivide, redivide or change (each, a "Subdivision") each issued and
unissued Exchangeable Share on the basis that each Exchangeable Share before the
Subdivision becomes that number of Exchangeable Shares as is equal to the sum of
(i) one; and (ii) the number of shares of SMTC Common Stock to be paid as a
stock dividend on each share of SMTC Common Stock. In such instance, and
notwithstanding any other provision hereof, such Subdivision shall become
effective on the effective date specified in Section 3.4 hereof without any
further act or formality on the part of the Board of Directors or of the holders
of Exchangeable Shares. For greater certainty, no approval of the holders of
Exchangeable Shares to an amendment to the articles of the Corporation shall be
required to give effect to such Subdivision.

3.3  Cheques of the Corporation payable at par at any branch of the bankers of
the Corporation shall be issued in respect of any cash dividends contemplated by
Section 3.1(a) hereof and the sending of such a cheque to each holder of an
Exchangeable Share shall satisfy the cash dividend represented thereby unless
the cheque is not paid on presentation. Subject to applicable law, certificates
registered in the name of the registered holder of Exchangeable Shares shall be
issued or transferred in respect of any stock dividends contemplated by Section
3.1(b) hereof or any Subdivision contemplated by Section 3.2 hereof and the
sending of such a certificate to each holder of an Exchangeable Share shall
satisfy the stock dividend or

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Subdivision represented thereby. Such other type and amount of property in
respect of any dividends contemplated by Section 3.1(c) hereof shall be issued,
distributed or transferred by the Corporation in such manner as it shall
determine and the issuance, distribution or transfer thereof by the Corporation
to each holder of an Exchangeable Share shall satisfy the dividend represented
thereby. No holder of an Exchangeable Share shall be entitled to recover by
action or other legal process against the Corporation any dividend that is
represented by a cheque that has not been duly presented to the Corporation's
bankers for payment or that otherwise remains unclaimed for a period of six
years from the date on which such dividend was payable.

3.4  The record date for the determination of the holders of Exchangeable Shares
entitled to receive payment of, and the payment date for, any dividend declared
on the Exchangeable Shares under Section 3.1 hereof shall be the same dates as
the record date and payment date, respectively, for the corresponding dividend
declared on the SMTC Common Stock. The record date for the determination of the
holders of Exchangeable Shares entitled to receive Exchangeable Shares in
connection with any Subdivision of Exchangeable Shares under Section 3.2 hereof
and the effective date of such Subdivision shall be the same dates as the record
date and payment date, respectively, for the corresponding stock dividend
declared on the SMTC Common Stock.

3.5  If, on any payment date for any dividends declared on the Exchangeable
Shares under Section 3.1 hereof, the dividends are not paid in full on all of
the Exchangeable Shares then outstanding, any such dividends that remain unpaid
shall be paid on a subsequent date or dates determined by the Board of Directors
on which the Corporation shall have sufficient moneys, assets or property
properly applicable to the payment of such dividends.

3.6  The Board of Directors shall determine, in good faith and in its sole
discretion, economic equivalence for the purposes of Sections 3.1 and 3.2
hereof, and each such determination shall be conclusive and binding on the
Corporation and its shareholders. In making each such determination, the
following factors shall, without excluding other factors determined by the Board
of Directors to be relevant, be considered by the Board of Directors:

     (a)  in the case of any stock dividend or other distribution payable in
          shares of SMTC Common Stock, the number of such shares issued in
          proportion to the number of shares of SMTC Common Stock previously
          outstanding;

     (b)  in the case of the issuance or distribution of any rights, options or
          warrants to subscribe for or purchase shares of SMTC Common Stock (or
          securities exchangeable for or convertible into or carrying rights to
          acquire shares of SMTC Common Stock), the relationship between the
          exercise price of each such right, option or warrant and the Current
          Market Price of a share of SMTC Common Stock;

     (c)  in the case of the issuance or distribution of any other form of
          property (including, without limitation, any shares or securities of
          SMTC of any class other than shares of SMTC Common Stock, any rights,
          options or warrants other than those referred to in Section 3.6(b)
          above, any evidences of indebtedness of SMTC or any assets of SMTC),
          the relationship between the fair market value

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          (as determined by the Board of Directors) of such property to be
          issued or distributed with respect to each outstanding share of SMTC
          Common Stock and the Current Market Price of a share of SMTC Common
          Stock;

     (d)  in the case of any subdivision, redivision or change of the then-
          outstanding shares of SMTC Common Stock into a greater number of
          shares of SMTC Common Stock or the reduction, combination,
          consolidation or change of the then-outstanding shares of SMTC Common
          Stock into a lesser number of shares of SMTC Common Stock or any
          amalgamation, merger, reorganization or other transaction affecting
          shares of SMTC Common Stock, the effect thereof upon the then-
          outstanding shares of SMTC Common Stock; and

     (e)  in all such cases, the general taxation consequences of the relevant
          event to holders of Exchangeable Shares to the extent that such
          consequences may differ from the taxation consequences to holders of
          shares of SMTC Common Stock as a result of differences between
          taxation laws of Canada and the United States (except for any
          differing consequences arising as a result of differing marginal
          taxation rates and without regard to the individual circumstances of
          holders of Exchangeable Shares).

                                   ARTICLE 4
                             CERTAIN RESTRICTIONS

4.1  So long as any of the Exchangeable Shares are outstanding, the Corporation
shall not at any time without, but may at any time with, the approval of the
holders of the Exchangeable Shares given as specified in Section 10.2 of these
share provisions:

     (a)  pay any dividends on the common shares of the Corporation or on any
          other shares ranking junior to the Exchangeable Shares, other than
          stock dividends payable in common shares of the Corporation, or any
          such other shares ranking junior to the Exchangeable Shares, as the
          case may be;

     (b)  redeem, purchase or make any capital distribution in respect of the
          common shares of the Corporation or any other shares ranking junior to
          the Exchangeable Shares;

     (c)  redeem or purchase any other shares of the Corporation ranking equally
          with the Exchangeable Shares with respect to the payment of dividends
          or on any liquidation distribution;

     (d)  issue any Exchangeable Shares; provided that the Corporation may at
          any time, with or without such approval, issue Exchangeable Shares (i)
          pursuant to any shareholder rights plan or equity incentive plan
          adopted by the Corporation, (ii) by way of stock dividend to the
          holders of Exchangeable Shares contemplated by Section 3.1 hereof, or
          (iii) by way of any subdivision of Exchangeable Shares contemplated by
          Section 3.2 hereof; or

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     (e)  issue any shares of the Corporation ranking equally with, or superior
          to, the Exchangeable Shares other than by way of stock dividend to the
          holders of such Exchangeable Shares.

     The restrictions in Sections 4.1(a), 4.1(b), 4.1(c) and 4.1(d) above shall
not apply at any time when the dividends on the outstanding Exchangeable Shares
corresponding to dividends declared and paid on the SMTC Common Stock shall have
been declared and paid in full.

                                   ARTICLE 5
                DISTRIBUTION ON LIQUIDATION OF THE CORPORATION

5.1  In the event of the liquidation, dissolution or winding-up of the
Corporation or any other distribution of the assets of the Corporation among its
shareholders for the purpose of winding-up its affairs, subject to the exercise
by SMTC Nova Scotia of the Liquidation Call Right, a holder of Exchangeable
Shares shall be entitled, subject to applicable law, to receive from the assets
of the Corporation in respect of each Exchangeable Share held by such holder on
the effective date (the "Company Liquidation Date") of such liquidation,
dissolution or winding-up, before any distribution of any part of the assets of
the Corporation among the holders of the common shares of the Corporation or any
other shares ranking junior to the Exchangeable Shares, an amount per share
equal to the Current Market Price of a share of SMTC Common Stock on the last
Business Day prior to the Company Liquidation Date (the "Company Liquidation
Amount"), which shall be satisfied in full by the Corporation causing to be
delivered to such holder one share of SMTC Common Stock, together with the
Dividend Amount.

5.2  On or promptly after the Company Liquidation Date, the Corporation shall
cause to be delivered to the holders of the Exchangeable Shares the Company
Liquidation Amount for each such Exchangeable Share upon presentation and
surrender of the certificates representing such Exchangeable Shares, together
with such other documents and instruments as may be required to effect a
transfer of Exchangeable Shares under the OBCA and the articles and bylaws of
the Corporation and such additional documents and instruments as the Transfer
Agent, SMTC or the Corporation may reasonably require, at the registered office
of the Corporation or at any office of the Transfer Agent as may be specified by
the Corporation by notice to the holders of the Exchangeable Shares. Payment of
the total Company Liquidation Amount for such Exchangeable Shares shall be made
by delivery to each holder, at the address of the holder recorded in the
securities register of the Corporation for the Exchangeable Shares or by holding
for pick-up by the holder at the registered office of the Corporation or at any
office of the Transfer Agent as may be specified by the Corporation by notice to
the holders of Exchangeable Shares, on behalf of the Corporation, certificates
representing shares of SMTC Common Stock and a cheque of the Corporation payable
at par at any branch of the bankers of the Corporation in respect of the
remaining portion, if any, of the total Company Liquidation Amount (without
interest), in each case, less any amounts withheld pursuant to Section 12.3. On
and after the Company Liquidation Date, the holders of the Exchangeable Shares
shall cease to be holders of such Exchangeable Shares and shall not be entitled
to exercise any of the rights of holders in respect thereof, other than the
right to receive their proportionate part of the total Company Liquidation
Amount, unless payment of the total Company Liquidation Amount for such
Exchangeable Shares shall not be made upon presentation and surrender of share

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certificates in accordance with the foregoing provisions, in which case the
rights of the holders shall remain unaffected until the total Company
Liquidation Amount has been paid in the manner hereinbefore provided. The
Corporation shall have the right at any time after the Company Liquidation Date
to deposit or cause to be deposited in a custodial account with any chartered
bank or trust company in Canada the total Company Liquidation Amount in respect
of the Exchangeable Shares represented by certificates that have not at the
Company Liquidation Date been surrendered by the holders thereof. Upon such
deposit being made, the rights of the holders of Exchangeable Shares after such
deposit shall be limited to receiving their proportionate part of the total
Company Liquidation Amount (without interest), in each case, less any amounts
withheld pursuant to Section 12.3 for such Exchangeable Shares so deposited,
against presentation and surrender of the said certificates held by them,
respectively, in accordance with the foregoing provisions. Upon such payment or
deposit of the total Company Liquidation Amount, the holders of the Exchangeable
Shares shall thereafter be considered and deemed for all purposes to be holders
of the SMTC Common Stock delivered to them or to the custodian on their behalf.

5.3  After the Corporation has satisfied its obligations to pay the holders of
the Exchangeable Shares the Company Liquidation Amount per Exchangeable Share
pursuant to Section 5.1 of these share provisions, such holders shall not be
entitled to share in any further distribution of the assets of the Corporation.

5.4  SMTC Nova Scotia shall have the overriding right (the "Liquidation Call
Right"), in the event of and notwithstanding the proposed liquidation,
dissolution or winding-up of SMTC Canada pursuant to these share provisions, to
purchase from all but not less than all of the holders of Exchangeable Shares
(other than any holder of Exchangeable Shares which is SMTC or an Affiliate of
SMTC) on the Company Liquidation Date all but not less than all of the
Exchangeable Shares held by each such holder on payment by SMTC Nova Scotia of
an amount per share (the "Liquidation Call Purchase Price") equal to the Current
Market Price of a share of SMTC Common Stock on the last Business Day prior to
the Company Liquidation Date, which shall be satisfied in full by SMTC Nova
Scotia causing to be delivered to such holder one share of SMTC Common Stock,
plus, to the extent not paid by the Corporation, an additional amount equivalent
to the Dividend Amount. In the event of the exercise of the Liquidation Call
Right by SMTC Nova Scotia in accordance with these share provisions, each holder
of Exchangeable Shares (other than SMTC or any Affiliate of SMTC) shall be
obligated to sell all of the Exchangeable Shares held by the holder to SMTC Nova
Scotia on the Company Liquidation Date and, upon payment by SMTC Nova Scotia to
the holder of the Liquidation Call Purchase Price for each such share, the
Corporation shall have no obligation to pay the Company Liquidation Amount of
such shares so purchased by SMTC Nova Scotia. If SMTC Nova Scotia does not
exercise the Liquidation Call Right in the manner described above, on the
Company Liquidation Date the holders of the Exchangeable Shares will be entitled
to receive in exchange therefor the Company Liquidation Amount otherwise payable
by the Corporation in connection with the liquidation, dissolution or winding-up
of the Corporation pursuant to this Article 5.

5.5  To exercise the Liquidation Call Right, SMTC Nova Scotia must notify the
Transfer Agent, as agent for the holders of Exchangeable Shares, and the
Corporation of SMTC Nova Scotia's intention to exercise such right at least 45
days before the Company Liquidation Date

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in the case of a voluntary liquidation, dissolution or winding-up of the
Corporation and at least five Business Days before the Company Liquidation Date
in the case of an involuntary liquidation, dissolution or winding-up of the
Corporation. The Transfer Agent will notify the holders of Exchangeable Shares
as to whether or not SMTC Nova Scotia has exercised the Liquidation Call Right
forthwith after the expiry of the period during which the same may be exercised
by SMTC Nova Scotia. If SMTC Nova Scotia exercises the Liquidation Call Right,
then on the Company Liquidation Date, SMTC Nova Scotia will purchase and holders
will sell all of the Exchangeable Shares then outstanding for a price per share
equal to the Liquidation Call Purchase Price.

5.6 For the purposes of completing the purchase of the Exchangeable Shares
pursuant to the exercise of the Liquidation Call Right, SMTC Nova Scotia shall
deposit with the Transfer Agent, on or before the Company Liquidation Date,
certificates representing the aggregate number of shares of SMTC Common Stock
deliverable by SMTC Nova Scotia pursuant to such exercise and a cheque or
cheques of SMTC Nova Scotia payable at par at any branch of the bankers of SMTC
Nova Scotia representing the aggregate Dividend Amount in payment of the total
Liquidation Call Purchase Price (without interest), less any amounts withheld
pursuant to Section 12.3. Provided that SMTC Nova Scotia has complied with the
immediately preceding sentence, on and after the Company Liquidation Date, the
rights of each holder of Exchangeable Shares will be limited to receiving such
holder's proportionate part of the total Liquidation Call Purchase Price payable
by SMTC Nova Scotia upon presentation and surrender by the holder of
certificates representing the Exchangeable Shares held by such holder and the
holder shall on and after the Company Liquidation Date be considered and deemed
for all purposes to be the holder of the shares of SMTC Common Stock to which it
is entitled pursuant to the exercise of the Liquidation Call Right. Upon
surrender to the Transfer Agent of a certificate or certificates representing
Exchangeable Shares, together with such other documents and instruments as may
be required to effect a transfer of Exchangeable Shares under the OBCA and the
articles and by-laws of the Corporation and such additional documents and
instruments as the Transfer Agent may reasonably require, the holder of such
surrendered certificate or certificates shall be entitled to receive in exchange
therefor, and the Transfer Agent on behalf of SMTC Nova Scotia shall deliver to
such holder, certificates representing the number of shares of SMTC Common Stock
to which the holder is entitled pursuant to the exercise of the Liquidation Call
Right and a cheque or cheques of SMTC Nova Scotia payable at par at any branch
of the bankers of SMTC Nova Scotia in payment of the remaining portion, if any,
of the total Liquidation Call Purchase Price (without interest), less any
amounts withheld pursuant to Section 12.3.

                                   ARTICLE 6
                  RETRACTION OF EXCHANGEABLE SHARES BY HOLDER

6.1 A holder of Exchangeable Shares shall be entitled at any time, subject to
the exercise by SMTC Nova Scotia of the Retraction Call Right and otherwise upon
compliance with the provisions of this Article 6, to require the Corporation to
redeem any or all of the Exchangeable Shares registered in the name of such
holder for an amount per share equal to the Current Market Price of a share of
SMTC Common Stock on the last Business Day prior to the Retraction Date (the
"Retraction Price"), which shall be satisfied in full by the Corporation causing
to be delivered to such holder one share of SMTC Common Stock for each

                                      -11-
<PAGE>

Exchangeable Share presented and surrendered by the holder, together with, on
the payment date therefor, the Dividend Amount. To effect such redemption, the
holder shall present and surrender at the registered office of the Corporation
or at any office of the Transfer Agent as may be specified by the Corporation by
notice to the holders of Exchangeable Shares the certificate or certificates
representing the Exchangeable Shares which the holder desires to have the
Corporation redeem, together with such other documents and instruments as may be
required to effect a transfer of Exchangeable Shares under the OBCA and the
articles and bylaws of the Corporation and such additional documents and
instruments as the Transfer Agent, SMTC or the Corporation may reasonably
require, and together with a duly executed statement (the "Retraction Request")
in the form of Schedule "A" hereto or in such other form as may be acceptable to
the Corporation:

     (a)  specifying that the holder desires to have all or any number specified
          therein of the Exchangeable Shares represented by such certificate or
          certificates (the "Retracted Shares") redeemed by the Corporation;

     (b)  stating the Retraction Date, provided that in the event that a
          Retraction Date is not specified by the holder in the Retraction
          Request, the Retraction Date shall be deemed to be the fifteenth
          Business Day after the date on which the Retraction Request is
          received by the Corporation; and

     (c)  acknowledging the overriding right (the "Retraction Call Right") of
          SMTC Nova Scotia to purchase all but not less than all of the
          Retracted Shares directly from the holder and that the Retraction
          Request shall be deemed to be a revocable offer by the holder to sell
          all but not less than all of the Retracted Shares to SMTC Nova Scotia
          in accordance with the Retraction Call Right on the terms and
          conditions set out in Section 6.3 of these share provisions.

6.2 Subject to the exercise by SMTC Nova Scotia of the Retraction Call Right,
upon receipt by the Corporation or the Transfer Agent in the manner specified in
Section 6.1 of a certificate or certificates representing the number of
Retracted Shares, together with a Retraction Request, and provided that the
Retraction Request is not revoked by the holder in the manner specified in
Section 6.7, the Corporation shall redeem the Retracted Shares effective at the
close of business on the Retraction Date and shall cause to be delivered to such
holder the total Retraction Price with respect to such shares, provided that all
declared and unpaid dividends for which the record date has occurred prior to
the Retraction Date shall be paid to the holder on the payment date for such
dividends. If only a part of the Exchangeable Shares represented by any
certificate is redeemed (or purchased by SMTC Nova Scotia pursuant to the
Retraction Call Right), a new certificate for the balance of such Exchangeable
Shares shall be issued to the holder at the expense of the Corporation.

6.3 Upon receipt by the Corporation of a Retraction Request, the Corporation
shall immediately notify SMTC Nova Scotia thereof. In order to exercise the
Retraction Call Right, SMTC Nova Scotia must notify the Corporation of its
determination to do so (the "SMTC Nova Scotia Call Notice") within five Business
Days of notification to SMTC Nova Scotia by the Corporation of the receipt by
the Corporation of the Retraction Request. If SMTC Nova Scotia does not so
notify the Corporation within such five Business Day period,

                                      -12-
<PAGE>

the Corporation will notify the holder as soon as possible thereafter that SMTC
Nova Scotia will not exercise the Retraction Call Right. If SMTC Nova Scotia
delivers the SMTC Nova Scotia Call Notice within such five Business Day period,
and provided that the Retraction Request is not revoked by the holder in the
manner specified in Section 6.7, the Retraction Request shall thereupon be
considered only to be an offer by the holder to sell the Retracted Shares to
SMTC Nova Scotia in accordance with the Retraction Call Right. In such event,
the Corporation shall not redeem the Retracted Shares and SMTC Nova Scotia shall
purchase from such holder and such holder shall sell to SMTC Nova Scotia on the
Retraction Date the Retracted Shares for a purchase price (the "Purchase Price")
per share equal to the Retraction Price per share, plus, on the designated
payment date therefor, to the extent not paid by the Corporation on the
designated payment date therefor, an additional amount equivalent to the
Dividend Amount. To the extent that SMTC Nova Scotia pays the Dividend Amount in
respect of the Retracted Shares, the Corporation shall no longer be obligated to
pay any declared and unpaid dividends on such Retracted Shares. For the purposes
of completing a purchase pursuant to the Retraction Call Right, SMTC Nova Scotia
shall deposit with the Transfer Agent, on or before the Retraction Date,
certificates representing shares of SMTC Common Stock registered in the name of
the holder or in such other name as the holder may request, and a cheque or
cheques of SMTC Nova Scotia payable at par at any branch of the bankers of SMTC
Nova Scotia representing the aggregate Dividend Amount (without interest), less
any amounts pursuant to Section 12.3. Provided that SMTC Nova Scotia has
complied with the immediately preceding sentence, the closing of the purchase
and sale of the Retracted Shares pursuant to the Retraction Call Right shall be
deemed to have occurred as at the close of business on the Retraction Date and,
for greater certainty, no redemption by the Corporation of such Retracted Shares
shall take place on the Retraction Date. In the event that SMTC Nova Scotia does
not deliver an SMTC Nova Scotia Call Notice within such five Business Day
period, and provided that the Retraction Request is not revoked by the holder in
the manner specified in Section 6.7, the Corporation shall redeem the Retracted
Shares on the Retraction Date and in the manner otherwise contemplated in this
Article 6.

6.4 The Corporation or SMTC Nova Scotia, as the case may be, shall deliver or
cause the Transfer Agent to deliver to the relevant holder, at the address of
the holder recorded in the securities register of the Corporation for the
Exchangeable Shares or at the address specified in the holder's Retraction
Request or by holding for pick-up by the holder at the registered office of the
Corporation or at any office of the Transfer Agent as may be specified by the
Corporation by notice to the holders of Exchangeable Shares, certificates
representing shares of SMTC Common Stock registered in the name of the holder or
in such other name as the holder may request, and, if applicable and on or
before the payment date therefor, a cheque payable at par at any branch of the
bankers of the Corporation or SMTC Nova Scotia, as applicable, representing the
aggregate Dividend Amount in payment of the total Retraction Price or the total
Purchase Price, as the case may be (without interest), in each case, less any
amounts withheld pursuant to Section 12.3, and such delivery of such
certificates and cheques on behalf of the Corporation or by SMTC Nova Scotia, as
the case may be, or by the Transfer Agent shall be deemed to be payment of and
shall satisfy and discharge all liability for the total Retraction Price or
total Purchase Price, as the case may be, to the extent that the same is
represented by such share certificates and cheques.

                                      -13-
<PAGE>

6.5 On and after the close of business on the Retraction Date, the holder of the
Retracted Shares shall cease to be a holder of such Retracted Shares and shall
not be entitled to exercise any of the rights of a holder in respect thereof,
other than the right to receive its proportionate part of the total Retraction
Price or total Purchase Price, as the case may be, unless upon presentation and
surrender of certificates in accordance with the foregoing provisions, payment
of the total Retraction Price or the total Purchase Price, as the case may be,
shall not be made as provided in Section 6.4, in which case the rights of such
holder shall remain unaffected until the total Retraction Price or the total
Purchase Price, as the case may be, has been paid in the manner hereinbefore
provided. On and after the close of business on the Retraction Date, provided
that presentation and surrender of certificates and payment of the total
Retraction Price or the total Purchase Price, as the case may be, has been made
in accordance with the foregoing provisions, the holder of the Retracted Shares
so redeemed by the Corporation or purchased by SMTC Nova Scotia shall thereafter
be considered and deemed for all purposes to be a holder of the shares of SMTC
Common Stock delivered to it.

6.6 Notwithstanding any other provision of this Article 6, the Corporation shall
not be obligated to redeem Retracted Shares specified by a holder in a
Retraction Request to the extent that such redemption of Retracted Shares would
be contrary to solvency requirements or other provisions of applicable law. If
the Corporation believes that on any Retraction Date it would not be permitted
by any of such provisions to redeem the Retracted Shares tendered for redemption
on such date, and provided that SMTC Nova Scotia shall not have exercised the
Retraction Call Right with respect to the Retracted Shares, the Corporation
shall only be obligated to redeem Retracted Shares specified by a holder in a
Retraction Request to the extent of the maximum number that may be so redeemed
(rounded down to the nearest whole number of shares) as would not be contrary to
such provisions and shall notify the holder and the Trustee at least two
Business Days prior to the Retraction Date as to the number of Retracted Shares
which will not be redeemed by the Corporation. In any case in which the
redemption by the Corporation of Retracted Shares would be contrary to solvency
requirements or other provisions of applicable law, the Corporation shall redeem
the maximum number of Exchangeable Shares which the Board of Directors
determines the Corporation is, on the Retraction Date, permitted to redeem,
which shall be selected as nearly as may be pro rata (disregarding fractions) in
proportion to the total number of Exchangeable Shares tendered for retraction by
holders thereof and the Corporation shall issue to each holder of Retracted
Shares a new certificate, at the expense of the Corporation, representing the
Retracted Shares not redeemed by the Corporation pursuant to Section 6.2.
Provided that the Retraction Request is not revoked by the holder in the manner
specified in Section 6.7 and provided further that SMTC Nova Scotia shall not
have exercised the Retraction Call Right with respect to the Retracted Shares,
the holder of any such Retracted Shares not redeemed by the Corporation pursuant
to Section 6.2 as a result of solvency requirements or other provisions of
applicable law shall be deemed, by giving the Retraction Request, to have
instructed the Trustee to require SMTC to purchase such Retracted Shares from
such holder on the Retraction Date or as soon as practicable thereafter on
payment by SMTC to such holder of the Purchase Price for each such Retracted
Share, all as more specifically provided in the Voting and Exchange Trust
Agreement.

6.7 A holder of Retracted Shares may by notice in writing given by the holder to
the Corporation before the close of business on the Business Day immediately
preceding the

                                      -14-
<PAGE>

Retraction Date, withdraw its Retraction Request, in which event such Retraction
Request shall be null and void and, for greater certainty, the revocable offer
constituted by the Retraction Request to sell the Retracted Shares to SMTC Nova
Scotia and the instruction to the Trustee to require SMTC to purchase such
Retracted Shares shall each be deemed to have been revoked.

                                   ARTICLE 7
                       REDEMPTION OF EXCHANGEABLE SHARES

7.1 Subject to applicable law, and provided that SMTC Nova Scotia has not
exercised the Redemption Call Right, the Corporation shall, on the Redemption
Date, redeem all but not less than all of the then outstanding Exchangeable
Shares for an amount per share equal to the Current Market Price of one share of
SMTC Common Stock on the last Business Day prior to the Redemption Date (the
"Redemption Price"), which shall be satisfied in full by the Corporation causing
to be delivered to each holder of Exchangeable Shares one share of SMTC Common
Stock for each Exchangeable Share held by such holder, together with the
Dividend Amount.

7.2 In any case of a redemption of Exchangeable Shares under this Article 7, the
Corporation shall, at least 60 days before the Redemption Date (other than a
Redemption Date established in connection with an SMTC Control Transaction, an
Exchangeable Share Voting Event or an Exempt Exchangeable Share Voting Event),
send or cause to be sent to each holder of Exchangeable Shares a notice in
writing of the redemption by the Corporation or the purchase by SMTC Nova Scotia
under the Redemption Call Right, as the case may be, of the Exchangeable Shares
held by such holder. In the case of a Redemption Date established in connection
with an SMTC Control Transaction, an Exchangeable Share Voting Event or an
Exempt Exchangeable Share Voting Event, the written notice of redemption by the
Corporation or the purchase by SMTC Nova Scotia under the Redemption Call Right
will be sent on or before the Redemption Date, on as many days' prior written
notice as may be determined by the Board of Directors to be reasonably
practicable in the circumstances. In any such case, such notice shall set out
the Redemption Price, as the case may be, the Redemption Date and, if
applicable, particulars of the Redemption Call Right.

7.3 On or after the Redemption Date and subject to the exercise by SMTC Nova
Scotia of the Redemption Call Right, the Corporation shall cause to be delivered
to the holders of the Exchangeable Shares to be redeemed the Redemption Price
for each such Exchangeable Share, together with the Dividend Amount, upon
presentation and surrender at the registered office of the Corporation or at any
office of the Transfer Agent as may be specified by the Corporation in such
notice of the certificates representing such Exchangeable Shares, together with
such other documents and instruments as may be required to effect a transfer of
Exchangeable Shares under the OBCA and the articles and bylaws of the
Corporation and such additional documents and instruments as the Transfer Agent,
SMTC or the Corporation may reasonably require. Payment of the total Redemption
Price for such Exchangeable Shares, together with payment of such dividends,
shall be made by delivery to each holder, at the address of the holder recorded
in the securities register of the Corporation or by holding for pick-up by the
holder at the registered office of the Corporation or at any office of the
Transfer Agent as may be specified by the Corporation in such notice, on behalf
of the Corporation, certificates representing shares of SMTC Common Stock and,
if applicable, a cheque of the Corporation

                                      -15-
<PAGE>

payable at par at any branch of the bankers of the Corporation in payment of any
such dividends (without interest), in each case, less any amounts withheld
pursuant to Section 12.3. On and after the Redemption Date, the holders of the
Exchangeable Shares called for redemption shall cease to be holders of such
Exchangeable Shares and shall not be entitled to exercise any of the rights of
holders in respect thereof, other than the right to receive their proportionate
part of the total Redemption Price and any such dividends, unless payment of the
total Redemption Price and any such dividends for such Exchangeable Shares shall
not be made upon presentation and surrender of certificates in accordance with
the foregoing provisions, in which case the rights of the holders shall remain
unaffected until the total Redemption Price and any such dividends have been
paid in the manner hereinbefore provided. The Corporation shall have the right
at any time after the sending of a notice of its intention to redeem the
Exchangeable Shares as aforesaid to deposit or cause to be deposited the total
Redemption Price for and the full amount of such dividends on (except as
provided in the preceding sentence) the Exchangeable Shares so called for
redemption, or of such Exchangeable Shares represented by certificates that have
not at the date of such deposit been surrendered by the holders thereof in
connection with such redemption, in a custodial account with any chartered bank
or trust company in Canada named in such notice (without interest), less any
amounts withheld pursuant to Section 12.3. Upon the later of such deposit being
made and the Redemption Date, the Exchangeable Shares in respect whereof such
deposit shall have been made shall be redeemed and the rights of the holders
thereof after such deposit or Redemption Date, as the case may be, shall be
limited to receiving their proportionate part of the total Redemption Price and
such dividends for such Exchangeable Shares so deposited (without interest),
against presentation and surrender of the said certificates held by them,
respectively, in accordance with the foregoing provisions. Upon such payment or
deposit of the total Redemption Price and the full amount of such dividends, the
holders of the Exchangeable Shares shall thereafter be considered and deemed for
all purposes to be holders of the SMTC Common Stock delivered to them or to the
custodian on their behalf.

7.4 SMTC Nova Scotia shall have the overriding right (the "Redemption Call
Right"), notwithstanding the proposed redemption of Exchangeable Shares by the
Corporation pursuant to these share provisions, to purchase from all but not
less than all of the holders of Exchangeable Shares (other than any holder of
Exchangeable Shares which is SMTC or an Affiliate of SMTC) on the Redemption
Date all but not less than all of the Exchangeable Shares held by each such
holder on payment by SMTC Nova Scotia to each holder of an amount per
Exchangeable Share (the "Redemption Call Purchase Price") equal to the Current
Market Price of a share of SMTC Common Stock on the last Business Day prior to
the Redemption Date, which shall be satisfied in full by SMTC Nova Scotia
causing to be delivered to such holder one share of SMTC Common Stock, plus, to
the extent not paid by the Corporation, an additional amount equivalent to the
Dividend Amount. In the event of the exercise of the Redemption Call Right by
SMTC Nova Scotia, each holder shall be obligated to sell all of the Exchangeable
Shares held by the holder to SMTC Nova Scotia on the Redemption Date and, upon
payment by SMTC Nova Scotia to the holder of the Redemption Call Purchase Price
for each such share, the Corporation shall have no obligation to redeem such
shares so purchased by SMTC Nova Scotia or to pay the Redemption Price in
respect thereof. If SMTC Nova Scotia does not exercise the Redemption Call Right
in the manner described above, on the Redemption Date the holders of the
Exchangeable Shares will be entitled to receive in

                                      -16-
<PAGE>

exchange therefor the Redemption Price otherwise payable by the Corporation in
connection with the redemption of Exchangeable Shares pursuant to this Article
7.

7.5 To exercise the Redemption Call Right, SMTC Nova Scotia must notify the
Transfer Agent, as agent for the holders of Exchangeable Shares, and the
Corporation of SMTC Nova Scotia's intention to exercise such right at least 60
days before the Redemption Date, except in the case of a redemption occurring as
a result of an SMTC Control Transaction, an Exchangeable Share Voting Event or
an Exempt Exchangeable Share Voting Event, in which case SMTC Nova Scotia shall
so notify the Transfer Agent and the Corporation on or before the Redemption
Date. The Transfer Agent will notify the holders of Exchangeable Shares as to
whether or not SMTC Nova Scotia has exercised the Redemption Call Right
forthwith after the expiry of the period during which the same may be exercised
by SMTC Nova Scotia. If SMTC Nova Scotia exercises the Redemption Call Right,
then on the Redemption Date, SMTC Nova Scotia will purchase and the holders will
sell all of the Exchangeable Shares then outstanding for a price per share equal
to the Redemption Call Purchase Price.

7.6 For the purposes of completing the purchase of the Exchangeable Shares
pursuant to the exercise of the Redemption Call Right, SMTC Nova Scotia shall
deposit with the Transfer Agent, on or before the Redemption Date, certificates
representing the aggregate number of shares of SMTC Common Stock deliverable by
SMTC Nova Scotia pursuant to such exercise and a cheque or cheques of SMTC Nova
Scotia payable at par at any branch of the bankers of SMTC Nova Scotia
representing the aggregate Dividend Amount in payment of the total Redemption
Call Purchase Price (without interest), less any amounts withheld pursuant to
Section 12.3. Provided that SMTC Nova Scotia has complied with the immediately
preceding sentence, on and after the Redemption Date, the rights of each holder
of Exchangeable Shares will be limited to receiving such holder's proportionate
part of the total Redemption Call Purchase Price payable by SMTC Nova Scotia
upon presentation and surrender by the holder of certificates representing the
Exchangeable Shares held by such holder and the holder shall on and after the
Redemption Date be considered and deemed for all purposes to be the holder of
the shares of SMTC Common Stock to which it is entitled pursuant to the exercise
of the Redemption Call Right. Upon surrender to the Transfer Agent of a
certificate or certificates representing Exchangeable Shares, together with such
other documents and instruments as may be required to effect a transfer of
Exchangeable Shares under the OBCA and the articles and by-laws of the
Corporation and such additional documents and instruments as the Transfer Agent
may reasonably require, the holder of such surrendered certificate or
certificates shall be entitled to receive in exchange therefor, and the Transfer
Agent on behalf of SMTC Nova Scotia shall deliver to such holder, certificates
representing shares of SMTC Common Stock to which the holder is entitled
pursuant to the exercise of the Redemption Call Right and a cheque or cheques of
SMTC Nova Scotia payable at par at any branch of the bankers of SMTC Nova Scotia
in payment of the remaining portion, if any, of the total Redemption Call
Purchase Price (without interest), less any amounts withheld pursuant to Section
12.3.

                                   ARTICLE 8
                           PURCHASE FOR CANCELLATION

8.1 Subject to applicable law and the articles of the Corporation, the
Corporation may at any time and from time to time purchase for cancellation all
or any part of the outstanding

                                      -17-
<PAGE>

Exchangeable Shares at any price by tender to all the holders of record of
Exchangeable Shares then outstanding or through the facilities of any stock
exchange or stock quotation system on which the Exchangeable Shares are then
listed or quoted at any price per share, together with an amount equal to the
Dividend Amount. If in response to an invitation for tenders under the
provisions of this Section 8.1, more Exchangeable Shares are tendered at a price
or prices acceptable to the Corporation than the Corporation is prepared to
purchase, the Exchangeable Shares to be purchased by the Corporation shall be
purchased as nearly as may be pro rata according to the number of shares
tendered by each holder who submits a tender to the Corporation, provided that
when shares are tendered at different prices, the pro rating shall be effected
(disregarding fractions) only with respect to the shares tendered at the price
at which more shares were tendered than the Corporation is prepared to purchase
after the Corporation has purchased all the shares tendered at lower prices. If
only part of the Exchangeable Shares represented by any certificate shall be
purchased, a new certificate for the balance of such shares shall be issued at
the expense of the Corporation.

                                  ARTICLE 9
                                 VOTING RIGHTS

9.1 Except as required by applicable law and by Article 10, Section 11.1 and
Section 12.2 hereof, the holders of the Exchangeable Shares shall not be
entitled as such to receive notice of or to attend any meeting of the
shareholders of the Corporation or to vote at any such meeting.

                                  ARTICLE 10
                            AMENDMENT AND APPROVAL

10.1 The rights, privileges, restrictions and conditions attaching to the
Exchangeable Shares may be added to, changed or removed but only with the
approval of the holders of the Exchangeable Shares given as hereinafter
specified.

10.2 Any approval given by the holders of the Exchangeable Shares to add to,
change or remove any right, privilege, restriction or condition attaching to the
Exchangeable Shares or any other matter requiring the approval or consent of the
holders of the Exchangeable Shares shall be deemed to have been sufficiently
given if it shall have been given in accordance with applicable law subject to a
minimum requirement that such approval be evidenced by a resolution passed by
not less than two-thirds of the votes cast on such resolution at a meeting of
holders of Exchangeable Shares duly called and held at which the holders of at
least 25% of the holders of outstanding Exchangeable Shares at that time are
present or represented by proxy; provided that if at any such meeting the
holders of at least 25% of the outstanding Exchangeable Shares at that time are
not present or represented by proxy within one-half hour after the time
appointed for such meeting, then the meeting shall be adjourned to such date not
less than five days thereafter and to such time and place as may be designated
by the chairman of such meeting. At such adjourned meeting the holders of
Exchangeable Shares present or represented by proxy thereat may transact the
business for which the meeting was originally called and a resolution passed
thereat by the affirmative vote of not less than two-thirds of the votes cast on
such resolution at such meeting shall constitute the approval or consent of the
holders of the Exchangeable Shares.

                                      -18-
<PAGE>

                                  ARTICLE 11
                    RECIPROCAL CHANGES, ETC. IN RESPECT OF
                               SMTC COMMON STOCK

11.1 Each holder of an Exchangeable Share acknowledges that the Exchangeable
Share Support Agreement provides, in part, that SMTC will not, without the prior
approval of the Corporation and the prior approval of the holders of the
Exchangeable Shares given in accordance with Section 10.2 of these share
provisions:

     (a)  issue or distribute shares of SMTC Common Stock (or securities
          exchangeable for or convertible into or carrying rights to acquire
          shares of SMTC Common Stock) to the holders of all or substantially
          all of the then outstanding shares of SMTC Common Stock by way of
          stock dividend or other distribution, other than an issue of shares of
          SMTC Common Stock (or securities exchangeable for or convertible into
          or carrying rights to acquire shares of SMTC Common Stock) to holders
          of shares of SMTC Common Stock who exercise an option to receive
          dividends in shares of SMTC Common Stock (or securities exchangeable
          for or convertible into or carrying rights to acquire shares of SMTC
          Common Stock) in lieu of receiving cash dividends;

     (b)  issue or distribute rights, options or warrants to the holders of all
          or substantially all of the then outstanding shares of SMTC Common
          Stock entitling them to subscribe for or to purchase shares of SMTC
          Common Stock (or securities exchangeable for or convertible into or
          carrying rights to acquire shares of SMTC Common Stock); or

     (c)  issue or distribute to the holders of all or substantially all of the
          then outstanding shares of SMTC Common Stock:

          (i)   shares or securities of SMTC of any class other than SMTC Common
                Stock (other than shares convertible into or exchangeable for or
                carrying rights to acquire shares of SMTC Common Stock);

          (ii)  rights, options or warrants other than those referred to in
                Section 11.1(b) above;

          (iii) evidences of indebtedness of SMTC; or

          (iv)  assets of SMTC;

unless the economic equivalent on a per share basis of such rights, options,
securities, shares, evidences of indebtedness or other assets is issued or
distributed simultaneously to holders of the Exchangeable Shares.

11.2 Each holder of an Exchangeable Share acknowledges that the Exchangeable
Share Support Agreement further provides, in part, that SMTC will not, without
the prior approval of the Corporation and the prior approval of the holders of
the Exchangeable Shares given in accordance with Section 10.2 of these share
provisions:

                                      -19-
<PAGE>

     (a)  subdivide, redivide or change the then outstanding shares of SMTC
          Common Stock into a greater number of shares of SMTC Common Stock;

     (b)  reduce, combine, consolidate or change the then outstanding shares of
          SMTC Common Stock into a lesser number of shares of SMTC Common Stock;
          or

     (c)  reclassify or otherwise change the shares of SMTC Common Stock or
          effect an amalgamation, merger, reorganization or other transaction
          affecting the shares of SMTC Common Stock;

unless the same or an economically equivalent change shall simultaneously be
made to or in the rights of the holders of the Exchangeable Shares. The
Exchangeable Share Support Agreement further provides, in part, that the
aforesaid provisions of the Exchangeable Share Support Agreement shall not be
changed without the approval of the holders of the Exchangeable Shares given in
accordance with Section 10.2 of these share provisions.

                                  ARTICLE 12
                 ACTIONS BY THE CORPORATION AND ITS AFFILIATES

12.1 The Corporation will take all such actions and do all such things as shall
be necessary or advisable to perform and comply with and to ensure performance
and compliance by SMTC, SMTC Nova Scotia and the Corporation with all provisions
of the Exchangeable Share Support Agreement applicable to SMTC, SMTC Nova Scotia
and the Corporation, respectively, in accordance with the terms thereof
including, without limitation, taking all such actions and doing all such things
as shall be necessary or advisable to enforce to the fullest extent possible for
the direct benefit of the Corporation all rights and benefits in favour of the
Corporation under or pursuant to such agreement.

12.2 The Corporation shall not propose, agree to or otherwise give effect to any
amendment to, or waiver or forgiveness of its rights or obligations under, the
Exchangeable Share Support Agreement without the approval of the holders of the
Exchangeable Shares given in accordance with Section 10.2 of these share
provisions other than such amendments, waivers and/or forgiveness as may be
necessary or advisable for the purposes of:

     (a)  adding to the covenants of the other parties to such agreement for the
          protection of the Corporation or the holders of the Exchangeable
          Shares thereunder;

     (b)  making such provisions or modifications not inconsistent with such
          agreement as may be necessary or desirable with respect to matters or
          questions arising thereunder which, in the good faith opinion of the
          Board of Directors, it may be expedient to make, provided that the
          Board of Directors shall be of the good faith opinion, after
          consultation with counsel, that such provisions and modifications will
          not be prejudicial to the interests of the holders of the Exchangeable
          Shares; or

     (c)  making such changes in or corrections to such agreement which, on the
          advice of counsel to the Corporation, are required for the purpose of
          curing or correcting any ambiguity or defect or inconsistent provision
          or clerical omission

                                      -20-
<PAGE>

     or mistake or manifest error contained therein, provided that the Board of
     Directors shall be of the good faith opinion, after consultation with
     counsel, that such changes or corrections will not be prejudicial to the
     interests of the holders of the Exchangeable Shares.

12.3 The Corporation, SMTC Nova Scotia, SMTC and the Transfer Agent shall be
entitled to deduct and withhold from any dividend or consideration otherwise
payable to any holder of Exchangeable Shares such amounts as the Corporation,
SMTC Nova Scotia, SMTC or the Transfer Agent is required to deduct and withhold
with respect to such payment under the Income Tax Act (Canada), the United
States Internal Revenue Code of 1986 or any provision of provincial, state,
local or foreign tax law, in each case, as amended. To the extent that amounts
are so withheld, such withheld amounts shall be treated for all purposes hereof
as having been paid to the holder of the Exchangeable Shares in respect of which
such deduction and withholding was made, provided that such withheld amounts are
actually remitted to the appropriate taxing authority. To the extent that the
amount so required or permitted to be deducted or withheld from any payment to a
holder exceeds the cash portion of the consideration otherwise payable to the
holder, the Corporation, SMTC Nova Scotia, SMTC and the Transfer Agent are
hereby authorized to sell or otherwise dispose of such portion of the
consideration as is necessary to provide sufficient funds to the Corporation,
SMTC Nova Scotia, SMTC or the Transfer Agent, as the case may be, to enable it
to comply with such deduction or withholding requirement and the Corporation,
SMTC Nova Scotia, SMTC or the Transfer Agent shall notify the holder thereof and
remit to such holder any unapplied balance of the net proceeds of such sale.

12.4 All shares of SMTC Common Stock delivered by or on behalf of the
Corporation, SMTC Nova Scotia, or SMTC to any holder of Exchangeable Shares in
accordance with these share provisions shall be duly issued as fully paid and
non-assessable and shall be free and clear of any lien, claim or encumbrance.

                                  ARTICLE 13
                              LEGEND; CALL RIGHTS

13.1 The certificates evidencing the Exchangeable Shares shall contain or have
affixed thereto a legend in form and on terms approved by the Board of
Directors, with respect to the Exchangeable Share Support Agreement, the Call
Rights, and the Voting and Exchange Trust Agreement (including the provisions
with respect to the voting rights, exchange right and automatic exchange right
thereunder).

13.2 Each holder of an Exchangeable Share, whether of record or beneficial, by
virtue of becoming and being such a holder shall be deemed to acknowledge each
of the Liquidation Call Right, the Retraction Call Right and the Redemption Call
Right, in each case, in favour of SMTC Nova Scotia, and the overriding nature
thereof in connection with the liquidation, dissolution or winding-up of the
Corporation or the retraction or redemption of Exchangeable Shares, as the case
may be, and to be bound thereby in favour of SMTC Nova Scotia as therein
provided.

                                      -21-
<PAGE>

                                  ARTICLE 14
                                    NOTICES

14.1 Any notice, request or other communication to be given to the Corporation
by a holder of Exchangeable Shares shall be in writing and shall be valid and
effective if given by mail (postage prepaid) or by fax or by delivery to the
registered office of the Corporation and addressed to the attention of the
President of the Corporation. Any such notice, request or other communication,
if given by mail, fax or delivery, shall only be deemed to have been given and
received upon actual receipt thereof by the Corporation.

14.2 Any presentation and surrender by a holder of Exchangeable Shares to the
Corporation or the Transfer Agent of certificates representing Exchangeable
Shares in connection with the liquidation, dissolution or winding-up of the
Corporation or the retraction or redemption of Exchangeable Shares shall be made
by ordinary mail (postage prepaid) or by delivery to the registered office of
the Corporation or to such office of the Transfer Agent as may be specified by
the Corporation, in each case, addressed to the attention of the President of
the Corporation. Any such presentation and surrender of certificates shall only
be deemed to have been made and to be effective upon actual receipt thereof by
the Corporation or the Transfer Agent, as the case may be. Any such presentation
and surrender of certificates made by ordinary mail shall be at the sole risk of
the holder mailing the same.

14.3 Any notice, request or other communication to be given to a holder of
Exchangeable Shares by or on behalf of the Corporation shall be in writing and
shall be valid and effective if given by mail (postage prepaid) or by delivery
to the address of the holder recorded in the securities register of the
Corporation or, in the event of the address of any such holder not being so
recorded, then at the last known address of such holder. Any such notice,
request or other communication, if given by mail, shall be deemed to have been
given and received on the third Business Day following the date of mailing and,
if given by delivery, shall be deemed to have been given and received on the
date of delivery. Accidental failure or omission to give any notice, request or
other communication to one or more holders of Exchangeable Shares shall not
invalidate or otherwise alter or affect any action or proceeding to be taken by
the Corporation pursuant thereto.

14.4 If the Corporation determines that mail service is or is threatened to be
interrupted at the time when the Corporation is required or elects to give any
notice to the holders of Exchangeable Shares hereunder, the Corporation shall,
notwithstanding the provisions hereof, give such notice by means of publication
in The Globe and Mail, national edition, or any other English language daily
newspaper or newspapers of general circulation in Canada and in a French
language daily newspaper of general circulation in the Province of Quebec, once
in each of two successive weeks, and notice so published shall be deemed to have
been given on the latest date on which the first publication has taken place.

     If, by reason of any actual or threatened interruption of mail service due
to strike, lockout or otherwise, any notice to be given to the Corporation would
be unlikely to reach its destination in a timely manner, such notice shall be
valid and effective only if delivered personally to the Corporation in
accordance with Section 14.1 or 14.2, as the case may be.

                                      -22-
<PAGE>

                                 SCHEDULE "A"
                             NOTICE OF RETRACTION

To:     SMTC Manufacturing Corporation of Canada (the "Corporation") and SMTC
        Nova Scotia Company ("SMTC Nova Scotia").

     This notice is given pursuant to Article 6 of the provisions (the
"Exchangeable Share Provisions") attaching to the Exchangeable Shares of the
Corporation represented by this certificate and all capitalized words and
expressions used in this notice that are defined in the Exchangeable Share
Provisions have the meanings ascribed to such words and expressions in such
Exchangeable Share Provisions.

     The undersigned hereby notifies the Corporation that, subject to the
Retraction Call Right referred to below, the undersigned desires to have the
Corporation redeem in accordance with Article 6 of the Exchangeable Share
Provisions:

     [_] all share(s) represented by this certificate; or

     [_] __________________ share(s) only represented by this certificate.

     The undersigned hereby notifies the Corporation that the Retraction Date
     shall be  _______________________.

     NOTE: The Retraction Date must be a Business Day and must not be less than
           10 Business Days nor more than 15 Business Days after the date upon
           which this notice is received by the Corporation. If no such Business
           Day is specified above, the Retraction Date shall be deemed to be the
           fifteenth Business Day after the date on which this notice is
           received by the Corporation.

     The undersigned acknowledges the overriding Retraction Call Right of SMTC
Nova Scotia to purchase all but not less than all the Retracted Shares from the
undersigned and that this notice shall be deemed to be a revocable offer by the
undersigned to sell the Retracted Shares to SMTC Nova Scotia in accordance with
the Retraction Call Right on the Retraction Date for the Purchase Price and on
the other terms and conditions set out in Section 6.3 of the Exchangeable Share
Provisions. This Retraction Request, and this offer to sell the Retracted Shares
to SMTC Nova Scotia, may be revoked and withdrawn by the undersigned by notice
in writing given to the Corporation at any time before the close of business on
the Business Day immediately preceding the Retraction Date.

     The undersigned acknowledges that if, as a result of solvency provisions of
applicable law, the Corporation is unable to redeem all Retracted Shares, the
undersigned will be deemed to have exercised the Exchange Right (as defined in
the Voting and Exchange Trust Agreement) so as to require SMTC to purchase the
unredeemed Retracted Shares.

                                      -i-
<PAGE>

     The undersigned hereby represents and warrants to the Corporation and SMTC
Nova Scotia that the undersigned:

     [_] is

     (select one)

     [_] is not

a non-resident of Canada for purposes of the Income Tax Act (Canada).

     The undersigned acknowledges that in the absence of an indication that the
undersigned is not a non-resident of Canada, withholding on account of Canadian
tax may be made from amounts payable to the undersigned on the redemption or
purchase of the Retracted Shares.

     The undersigned hereby represents and warrants to the Corporation and SMTC
Nova Scotia that the undersigned has good title to, and owns, the share(s)
represented by this certificate to be acquired by the Corporation or SMTC Nova
Scotia, as the case may be, free and clear of all liens, claims and
encumbrances.

___________     _____________________________        __________________________
(Date)          (Signature of Shareholder)           (Guarantee of Signature)

[_]   Please check box if the securities and any cheque(s) resulting from the
      retraction or purchase of the Retracted Shares are to be held for pick-up
      by the shareholder from the Transfer Agent, failing which the securities
      and any cheque(s) will be mailed to the last address of the shareholder as
      it appears on the register.

NOTE: This panel must be completed and this certificate, together with such
      additional documents as the Transfer Agent may require, must be deposited
      with the Transfer Agent. The securities and any cheque(s) resulting from
      the retraction or purchase of the Retracted Shares will be issued and
      registered in, and made payable to, respectively, the name of the
      shareholder as it appears on the register of the Corporation and the
      securities and any cheque(s) resulting from such retraction or purchase
      will be delivered to such shareholder as indicated above, unless the form
      appearing immediately below is duly completed.

                                     -ii-
<PAGE>

Date: ___________________________

Name of Person in Whose Name Securities or Cheque(s) Are to be Registered,
Issued or Delivered (please print): _____________________________________

Street Address or P.O. Box: _____________________________________________

Signature of Shareholder:  ______________________________________________

City, Province and Postal Code: _________________________________________

Signature Guaranteed by: ________________________________________________

NOTE: If this Retraction Request is for less than all of the shares represented
      by this certificate, a certificate representing the remaining shares of
      the Corporation will be issued and registered in the name of the
      shareholder as it appears on the register of the Corporation, unless the
      Share Transfer Power hereon is duly completed in respect of such share(s).

                                     -iii-<PAGE>

                                                                     EXHIBIT 4.3

                     EXCHANGEABLE SHARE SUPPORT AGREEMENT

     MEMORANDUM OF AGREEMENT made as of the 27th day of July, 2000.

AMONG:

                    SMTC CORPORATION,
                    a corporation existing under the laws of
                    the State of Delaware
                    (hereinafter referred to as "SMTC"),

                                                       OF THE FIRST PART,

                               - and -

                    SMTC NOVA SCOTIA COMPANY,
                    an unlimited company existing under the laws of
                    the Province of Nova Scotia
                    (hereinafter referred to as "SMTC Nova Scotia"),

                                                       OF THE SECOND PART,

                               - and -

                    SMTC MANUFACTURING CORPORATION
                    OF CANADA,
                    a corporation existing under the laws of
                    the Province of Ontario
                    (hereinafter referred to as "SMTC Canada"),

                                                      OF THE THIRD PART.

          WHEREAS, pursuant to an underwriting agreement dated as of July 20,
2000 and a prospectus dated July 20, 2000 filed with the securities regulatory
authorities in each of the provinces of Canada (the "Prospectus"), SMTC Canada
has agreed to issue 4,375,000 non-voting exchangeable shares of SMTC Canada
("Exchangeable Shares") to the public in an initial public offering (the
"Initial Public Offering") and may, from time to time, issue additional
Exchangeable Shares or securities exchangeable for or convertible into or
carrying rights to acquire Exchangeable Shares;

          AND WHEREAS SMTC Canada will, on the date of this agreement, issue
1,469,445 Exchangeable Shares to certain SMTC Canada shareholders on the
conversion of previously issued SMTC Canada Class L exchangeable shares;

          AND WHEREAS each Exchangeable Share is exchangeable at the holder's
option at any time, without further payment, for one share of common stock of
SMTC (the "SMTC Common Stock");
<PAGE>

          AND WHEREAS coincident with and as part of the issue of Exchangeable
Shares pursuant to the Initial Public Offering, SMTC, SMTC Nova Scotia and SMTC
Canada are to execute a support agreement substantially in the form of this
agreement;

          NOW THEREFORE in consideration of the respective covenants and
agreements provided in this agreement and for other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged),
the parties hereto covenant and agree as follows:

                                   ARTICLE 1
                        DEFINITIONS AND INTERPRETATION

1.1  Definitions

     Each term denoted herein by initial capital letters and not otherwise
defined herein shall have the meaning ascribed thereto in the rights,
privileges, restrictions and conditions attaching to the Exchangeable Shares
(collectively, the "Exchangeable Share Provisions"), unless the context requires
otherwise.

1.2  Interpretation Not Affected by Headings

     The division of this agreement into Articles, Sections and other portions
and the insertion of headings are for convenience of reference only and shall
not affect the construction or interpretation of this agreement. Unless
otherwise indicated, all references to an "Article" or "Section" followed by a
number and/or letter refer to the specified Article or Section of this
agreement. The terms "this agreement", "hereof", "herein" and "hereunder" and
similar expressions refer to this agreement and not to any particular Article,
Section or other portion hereof, and include any agreement or instrument
supplementary or ancillary hereto.

1.3  Number, Gender

     In this agreement, unless the context otherwise requires, words importing
the singular number only shall include the plural and vice versa, and words
importing any gender shall include all genders.

1.4  Date for Any Action

     If any date on which any action is required to be taken under this
agreement is not a Business Day, such action shall be required to be taken on
the next succeeding Business Day.

                                   ARTICLE 2
                       COVENANTS OF SMTC AND SMTC CANADA

2.1  Covenants Regarding Exchangeable Shares

     So long as any Exchangeable Shares (other than Exchangeable Shares owned by
SMTC or its Affiliates) remain outstanding, SMTC will:

                                      -2-
<PAGE>

     (a)  not declare or pay any dividend on the shares of SMTC Common Stock
          unless (i) SMTC Canada shall (w) simultaneously declare or pay, as the
          case may be, an equivalent dividend (as provided for in the
          Exchangeable Share Provisions) on the Exchangeable Shares (an
          "Equivalent Dividend"), and (x) have sufficient money or other assets
          or authorized but unissued securities available to enable the due
          declaration and the due and punctual payment, in accordance with
          applicable law, of any Equivalent Dividend, or (ii) SMTC Canada shall
          (y) simultaneously subdivide the Exchangeable Shares in lieu of a
          stock dividend thereon (as provided for in the Exchangeable Share
          Provisions) (an "Equivalent Stock Subdivision"), and (z) have
          sufficient authorized but unissued securities available to enable the
          Equivalent Stock Subdivision;

     (b)  advise SMTC Canada sufficiently in advance of the declaration by SMTC
          of any dividend on the shares of SMTC Common Stock and take all such
          other actions as are reasonably necessary, in co-operation with SMTC
          Canada, to ensure that (i) the respective declaration date, record
          date and payment date for an Equivalent Dividend shall be the same as
          the declaration date, record date and payment date for the
          corresponding dividend on the shares of SMTC Common Stock or, (ii) the
          record date and effective date for an Equivalent Stock Subdivision
          shall be the same as the record date and payment date for the
          corresponding stock dividend on the shares of SMTC Common Stock;

     (c)  ensure that the record date for any dividend declared on the shares of
          SMTC Common Stock is not less than 10 Business Days after the
          declaration date of such dividend;

     (d)  take all such actions and do all such things as are reasonably
          necessary or desirable to enable and permit SMTC Canada, in accordance
          with applicable law, to pay and otherwise perform its obligations with
          respect to the satisfaction of the Company Liquidation Amount, the
          Retraction Price or the Redemption Price in respect of each issued and
          outstanding Exchangeable Share (other than Exchangeable Shares owned
          by SMTC or its Affiliates) upon the liquidation, dissolution or
          winding-up of SMTC Canada, the delivery of a Retraction Request by a
          holder of Exchangeable Shares or a redemption of Exchangeable Shares
          by SMTC Canada, as the case may be, including without limitation all
          such actions and all such things as are necessary or desirable to
          enable and permit SMTC Canada to cause to be delivered shares of SMTC
          Common Stock to the holders of Exchangeable Shares in accordance with
          the provisions of Articles 5, 6 or 7, as the case may be, of the
          Exchangeable Share Provisions;

     (e)  take all such actions and do all such things as are reasonably
          necessary or desirable to enable and permit SMTC Nova Scotia, in
          accordance with applicable law, to perform its obligations arising
          upon the exercise by it of the Liquidation Call Right, the Retraction
          Call Right or the Redemption Call Right, including without limitation
          all such actions and all such things as are necessary or desirable to
          enable and permit SMTC Nova Scotia to cause to be delivered shares of
          SMTC Common Stock to the holders of Exchangeable Shares in accordance
          with the

                                      -3-
<PAGE>

          provisions of the Liquidation Call Right, the Retraction Call Right or
          the Redemption Call Right, as the case may be; and

     (f)  if it becomes a "specified financial institution" (as such term is
          defined in the Income Tax Act (Canada)) or does not deal at arm's
          length with such a person, take all such actions and do all such
          things as are reasonably necessary or desirable to cause SMTC Nova
          Scotia to exercise the Retraction Call Right if requested to do so by
          a holder of Exchangeable Shares making a Retraction Request.

2.2  Segregation of Funds

     SMTC will cause SMTC Canada or SMTC Nova Scotia, as the case may be, to
deposit a sufficient amount of funds in a separate account of SMTC Canada or
SMTC Nova Scotia and segregate a sufficient amount of such other assets and
property as is necessary to enable SMTC Canada to pay dividends when due and to
enable SMTC Canada or SMTC Nova Scotia to pay or otherwise satisfy their
respective obligations under Articles 5, 6 or 7 of the Exchangeable Share
Provisions, as applicable.

2.3  Reservation of SMTC Common Stock

     SMTC hereby represents, warrants and covenants in favour of SMTC Canada and
SMTC Nova Scotia that SMTC has reserved for issuance and will, at all times
while any Exchangeable Shares (other than Exchangeable Shares held by SMTC or
its Affiliates) are outstanding, keep available, free from pre-emptive and other
rights, out of its authorized and unissued capital stock such number of shares
of SMTC Common Stock (or other shares or securities into which shares of SMTC
Common Stock may be reclassified or changed as contemplated by Section 2.7) (a)
as is equal to the sum of (i) the number of Exchangeable Shares issued and
outstanding from time to time, and (ii) the number of Exchangeable Shares
issuable upon the exercise of all rights, options or other entitlements to
acquire Exchangeable Shares outstanding from time to time, and (b) as are now
and may hereafter be required to enable and permit SMTC to meet its obligations
under the Voting and Exchange Trust Agreement and under any other security or
commitment pursuant to which SMTC may now or hereafter be required to issue
shares of SMTC Common Stock, to enable and permit SMTC Nova Scotia to meet its
obligations under each of the Liquidation Call Right, the Retraction Call Right
and the Redemption Call Right and to enable and permit SMTC Canada to meet its
obligations hereunder and under the Exchangeable Share Provisions.

2.4  Notification of Certain Events

     In order to assist SMTC in complying with its obligations hereunder and to
permit SMTC Nova Scotia to exercise the Liquidation Call Right, the Retraction
Call Right and the Redemption Call Right, SMTC Canada will notify SMTC and SMTC
Nova Scotia of each of the following events at the time set forth below:

                                      -4-
<PAGE>

     (a)  in the event of any determination by the Board of Directors to
          institute voluntary liquidation, dissolution or winding-up proceedings
          with respect to SMTC Canada or to effect any other distribution of the
          assets of SMTC Canada among its shareholders for the purpose of
          winding-up its affairs, at least 60 days prior to the proposed
          effective date of such liquidation, dissolution, winding-up or other
          distribution;

     (b)  promptly, upon the earlier of receipt by SMTC Canada of notice of and
          SMTC Canada otherwise becoming aware of any threatened or instituted
          claim, suit, petition or other proceedings with respect to the
          involuntary liquidation, dissolution or winding-up of SMTC Canada or
          to effect any other distribution of the assets of SMTC Canada among
          its shareholders for the purpose of winding-up its affairs;

     (c)  immediately, upon receipt by SMTC Canada of a Retraction Request;

     (d)  on the same date on which notice of redemption is given to holders of
          Exchangeable Shares, upon the determination of a Redemption Date in
          accordance with the Exchangeable Share Provisions; and

     (e)  as soon as practicable upon the issuance by SMTC Canada of any
          Exchangeable Shares, rights, options or warrants to acquire
          Exchangeable Shares or other securities exchangeable for or
          convertible into Exchangeable Shares.

2.5  Delivery of SMTC Common Stock to SMTC Canada and SMTC Nova Scotia

     In furtherance of its obligations under Sections 2.1(d) and (e), upon
notice from SMTC Canada or SMTC Nova Scotia of any event that requires SMTC
Canada or SMTC Nova Scotia to cause to be delivered shares of SMTC Common Stock
to any holder of Exchangeable Shares, SMTC shall forthwith issue and deliver or
cause to be delivered to SMTC Canada or SMTC Nova Scotia the requisite number of
shares of SMTC Common Stock to be received by, and issued to or to the order of,
the former holder of the surrendered Exchangeable Shares, as SMTC Canada or SMTC
Nova Scotia shall direct. All such shares of SMTC Common Stock shall be duly
authorized and validly issued as fully paid and non-assessable and shall be free
and clear of any lien, claim or encumbrance. In consideration of the issuance
and delivery of each such share of SMTC Common Stock, SMTC Canada or SMTC Nova
Scotia, as the case may be, shall issue to SMTC, or, as SMTC shall direct,
common shares of SMTC Canada or SMTC Nova Scotia, cash, securities or other
property having equivalent value.

2.6  Qualification of SMTC Common Stock

     If any shares of SMTC Common Stock (or other shares or securities into
which shares of SMTC Common Stock may be reclassified or changed as contemplated
by Section 2.7) to be issued and delivered hereunder require registration or
qualification with or approval of or the filing of any document, including any
prospectus or similar document or the taking of any proceeding with or the
obtaining of any order, ruling or consent from any governmental or regulatory
authority under any Canadian or United States federal, provincial or state
securities or other law or regulation or pursuant to the rules and regulations
of any securities or other

                                      -5-
<PAGE>

regulatory authority or the fulfilment of any other Canadian or United States
legal requirement before such shares (or such other shares or securities) may be
issued by SMTC and delivered by SMTC at the direction of SMTC Nova Scotia or
SMTC Canada, if applicable, to the holder of surrendered Exchangeable Shares or
in order that such shares (or such other shares or securities) may be freely
traded thereafter (other than any restrictions of general application on
transfer of securities of an issuer that is not a "reporting issuer" or
equivalent within the meaning of Canadian provincial securities laws, or by
reason of a holder being a "control person" for purposes of Canadian provincial
securities law or an "affiliate" of SMTC for purposes of United States federal
or state securities law), SMTC will, in good faith, expeditiously take all such
actions and do all such things as are necessary or desirable to cause such
shares of SMTC Common Stock (or such other shares or securities) to be and
remain duly registered, qualified or approved under Canadian and/or United
States law, as the case may be. SMTC will, in good faith, expeditiously take all
such actions and do all such things as are reasonably necessary or desirable to
cause all shares of SMTC Common Stock (or such other shares or securities) to be
delivered hereunder to be listed, quoted or posted for trading on all stock
exchanges and quotation systems on which outstanding shares of SMTC Common Stock
(or such other shares or securities) have been listed by SMTC and remain listed
and are quoted or posted for trading at such time.

2.7 Economic Equivalence

     (a)  SMTC will not, without the prior approval of SMTC Canada and the prior
          approval of the holders of the Exchangeable Shares given in accordance
          with Section 10.2 of the Exchangeable Share Provisions:

          (i)   issue or distribute shares of SMTC Common Stock (or securities
                exchangeable for or convertible into or carrying rights to
                acquire shares of SMTC Common Stock) to the holders of all or
                substantially all of the then-outstanding shares of SMTC Common
                Stock by way of stock dividend or other distribution, other than
                an issue of shares of SMTC Common Stock (or securities
                exchangeable for or convertible into or carrying rights to
                acquire shares of SMTC Common Stock) to holders of shares of
                SMTC Common Stock who exercise an option to receive dividends in
                shares of SMTC Common Stock (or securities exchangeable for or
                convertible into or carrying rights to acquire shares of SMTC
                Common Stock) in lieu of receiving cash dividends; or

          (ii)  issue or distribute rights, options or warrants to the holders
                of all or substantially all of the then-outstanding shares of
                SMTC Common Stock entitling them to subscribe for or to purchase
                shares of SMTC Common Stock (or securities exchangeable for or
                convertible into or carrying rights to acquire shares of SMTC
                Common Stock); or

          (iii) issue or distribute to the holders of all or substantially all
                of the then-outstanding shares of SMTC Common Stock (A) shares
                or securities of SMTC of any class other than shares of SMTC
                Common Stock (other than shares convertible into or exchangeable
                for or carrying rights to

                                      -6-
<PAGE>

                acquire shares of SMTC Common Stock), (B) rights, options or
                warrants other than those referred to in Section 2.7(a)(ii), (C)
                evidences of indebtedness of SMTC or (D) assets of SMTC;

     unless the economic equivalent on a per share basis of such rights,
     options, securities, shares, evidences of indebtedness or other assets is
     issued or distributed simultaneously to holders of the Exchangeable Shares,
     in which case, for greater certainty, no approval of the holders of
     Exchangeable Shares is required.

(b)  SMTC will not, without the prior approval of SMTC Canada and the prior
     approval of the holders of the Exchangeable Shares given in accordance with
     Section 10.2 of the Exchangeable Share Provisions:

     (i)   subdivide, redivide or change the then-outstanding shares of SMTC
           Common Stock into a greater number of shares of SMTC Common Stock; or

     (ii)  reduce, combine, consolidate or change the then-outstanding shares of
           SMTC Common Stock into a lesser number of shares of SMTC Common
           Stock; or

     (iii) reclassify or otherwise change shares of SMTC Common Stock or effect
           an amalgamation, merger, reorganization or other transaction
           affecting shares of SMTC Common Stock;

     unless the same or an economically equivalent change shall simultaneously
     be made to, or in the rights of the holders of, the Exchangeable Shares, in
     which case, for greater certainty, no approval of the holders of
     Exchangeable Shares is required.

(c)  SMTC will ensure that the record date for any event referred to in Sections
     2.7(a) or 2.7(b) above, or (if no record date is applicable for such event)
     the effective date for any such event, is not less than five Business Days
     after the date on which such event is declared or announced by SMTC (with
     contemporaneous notification thereof by SMTC to SMTC Canada).

(d)  The Board of Directors shall determine, in good faith and in its sole
     discretion, economic equivalence for the purposes of any event referred to
     in Sections 2.7(a) or 2.7(b) and each such determination shall be
     conclusive and binding on SMTC. In making each such determination, the
     following factors shall, without excluding other factors determined by the
     Board of Directors to be relevant, be considered by the Board of Directors:

     (i)  in the case of any stock dividend or other distribution payable in
          shares of SMTC Common Stock, the number of such shares issued in
          proportion to the number of shares of SMTC Common Stock previously
          outstanding;

                                      -7-
<PAGE>

     (ii)  in the case of the issuance or distribution of any rights, options or
           warrants to subscribe for or purchase shares of SMTC Common Stock (or
           securities exchangeable for or convertible into or carrying rights to
           acquire shares of SMTC Common Stock), the relationship between the
           exercise price of each such right, option or warrant and the Current
           Market Price of a share of SMTC Common Stock;

     (iii) in the case of the issuance or distribution of any other form of
           property (including, without limitation, any shares or securities of
           SMTC of any class other than shares of SMTC Common Stock, any rights,
           options or warrants other than those referred to in Section
           2.7(d)(ii), any evidences of indebtedness of SMTC or any assets of
           SMTC), the relationship between the fair market value (as determined
           by the Board of Directors) of such property to be issued or
           distributed with respect to each outstanding share of SMTC Common
           Stock and the Current Market Price of a share of SMTC Common Stock;

     (iv)  in the case of any subdivision, redivision or change of the then-
           outstanding shares of SMTC Common Stock into a greater number of
           shares of SMTC Common Stock or the reduction, combination,
           consolidation or change of the then-outstanding shares of SMTC Common
           Stock into a lesser number of shares of SMTC Common Stock or any
           amalgamation, merger, reorganization or other transaction affecting
           shares of SMTC Common Stock, the effect thereof upon the then-
           outstanding shares of SMTC Common Stock; and

     (v)   in all such cases, the general taxation consequences of the relevant
           event to holders of Exchangeable Shares to the extent that such
           consequences may differ from the taxation consequences to holders of
           shares of SMTC Common Stock as a result of differences between
           taxation laws of Canada and the United States (except for any
           differing consequences arising as a result of differing marginal
           taxation rates and without regard to the individual circumstances of
           holders of Exchangeable Shares).

(e)  SMTC Canada agrees that, to the extent required, upon due notice from SMTC,
     SMTC Canada will use its best efforts to take or cause to be taken such
     steps as may be necessary for the purposes of ensuring that appropriate
     dividends are paid or other distributions are made by SMTC Canada, or
     subdivisions, redivisions or changes are made to the Exchangeable Shares,
     in order to implement the required economic equivalence with respect to the
     shares of SMTC Common Stock and Exchangeable Shares as provided for in this
     Section 2.7.

2.8 Tender Offers

     In the event that a tender offer, share exchange offer, issuer bid, take-
over bid or similar transaction with respect to shares of SMTC Common Stock
(each, an "Offer") is proposed by SMTC or is proposed to SMTC or its
shareholders and is recommended by the board of directors

                                      -8-
<PAGE>

of SMTC, or is otherwise effected or to be effected with the consent or approval
of the board of directors of SMTC, and the Exchangeable Shares are not redeemed
by SMTC Canada or purchased by SMTC Nova Scotia pursuant to the Redemption Call
Right, SMTC will use its reasonable efforts, expeditiously and in good faith, to
take all such actions and do all such things as are necessary or desirable to
enable and permit holders of Exchangeable Shares to participate in such Offer to
the same extent and on an economically equivalent basis as the holders of shares
of SMTC Common Stock, without discrimination. Without limiting the generality of
the foregoing, SMTC will use its reasonable efforts expeditiously and in good
faith to ensure that holders of Exchangeable Shares may participate in all such
Offers without being required to exercise their right to retract Exchangeable
Shares as against SMTC Canada (or, if so required, to ensure that any such
retraction shall be effective only upon, and shall be conditional upon, the
closing of the Offer and only to the extent necessary to tender to or deposit
under the Offer). Nothing herein shall affect the rights of SMTC Canada to
redeem (or SMTC Nova Scotia to purchase pursuant to the Redemption Call Right)
Exchangeable Shares, as applicable, in the event of an SMTC Control Transaction.

2.9  Ownership of Outstanding Shares

     Without the prior approval of SMTC Canada and the prior approval of the
holders of Exchangeable Shares given in accordance with Section 10.2 of the
Exchangeable Share Provisions, SMTC covenants and agrees in favour of SMTC
Canada that, as long as any outstanding Exchangeable Shares are owned by any
person or entity other than SMTC or any of its Affiliates, SMTC will be and
remain the direct or indirect beneficial owner of all issued and outstanding
voting shares in the capital of SMTC Canada and SMTC Nova Scotia.

2.10 SMTC and Affiliates Not to Vote Exchangeable Shares

     SMTC covenants and agrees that it will appoint and cause to be appointed
proxyholders with respect to all Exchangeable Shares held by it and its
Affiliates for the sole purpose of attending each meeting of holders of
Exchangeable Shares in order to be counted as part of the quorum for each such
meeting. SMTC further covenants and agrees that it will not, and will cause its
Affiliates not to, exercise any voting rights which may be exercisable by
holders of Exchangeable Shares from time to time pursuant to the Exchangeable
Share Provisions or pursuant to the provisions of the Business Corporations Act
(Ontario) (or any successor or other corporate statute by which SMTC Canada may
in the future be governed) with respect to any Exchangeable Shares held by it or
by its Affiliates in respect of any matter considered at any meeting of holders
of Exchangeable Shares.

2.11 Rule 10b-18 Purchases

     For greater certainty, nothing contained in this agreement, including
without limitation the obligations of SMTC contained in Section 2.8, shall limit
the ability of SMTC or SMTC Canada to make a "Rule l0b-18 Purchase" of shares of
SMTC Common Stock pursuant to Rule l0b-18 of the U.S. Securities Exchange Act of
1934, as amended, or any successor provisions thereof.

                                      -9-
<PAGE>

2.12 Stock Exchange Listing

     SMTC covenants and agrees in favour of SMTC Canada that, as long as any
outstanding Exchangeable Shares are owned by any person or entity other than
SMTC or any of its Affiliates, SMTC will use its reasonable best efforts to
maintain a listing for such Exchangeable Shares on a Canadian stock exchange.

                                  ARTICLE 3
                                SMTC SUCCESSORS

3.1  Certain Requirements in Respect of Combination

     SMTC shall not consummate any transaction (whether by way of
reconstruction, reorganization, consolidation, merger, transfer, sale, lease or
otherwise) whereby all or substantially all of its undertaking, property and
assets would become the property of any other Person or, in the case of a
merger, of the continuing corporation resulting therefrom unless, but may do so
if:

     (a)  such other Person or continuing corporation (the "SMTC Successor"), by
          operation of law, becomes, without more, bound by the terms and
          provisions of this agreement or, if not so bound, executes, prior to
          or contemporaneously with the consummation of such transaction, an
          agreement supplemental hereto and such other instruments (if any) as
          are reasonably necessary or advisable to evidence the assumption by
          the SMTC Successor of liability for all moneys payable and property
          deliverable hereunder and the covenant of such SMTC Successor to pay
          and deliver or cause to be delivered the same and its agreement to
          observe and perform all the covenants and obligations of SMTC under
          this agreement; and

     (b)  such transaction shall be upon such terms and conditions as
          substantially to preserve and not to impair in any material respect
          any of the rights, duties, powers and authorities of the other parties
          hereunder or the holders of Exchangeable Shares.

3.2  Vesting of Powers in Successor

     Whenever the conditions of Section 3.1 have been duly observed and
performed, the parties, if required by Section 3.1, shall execute and deliver a
supplemental agreement hereto and thereupon the SMTC Successor shall possess and
from time to time may exercise each and every right and power and shall be
subject to each and every obligation of SMTC under this agreement in the name of
SMTC or otherwise and any act or proceeding under any provision of this
agreement required to be done or performed by the board of directors of SMTC or
any officers of SMTC may be done and performed with like force and effect by the
directors or officers of such SMTC Successor.

                                      -10-
<PAGE>

3.3  Wholly-Owned Subsidiaries

     Nothing herein shall be construed as preventing the amalgamation or merger
of any wholly-owned direct or indirect subsidiary of SMTC with or into SMTC or
the winding-up, liquidation or dissolution of any wholly-owned subsidiary of
SMTC provided that all of the assets of such subsidiary are transferred to SMTC
or another wholly-owned direct or indirect subsidiary of SMTC and any such
transactions are expressly permitted by this Article 3.

                                  ARTICLE 4
                                   GENERAL

4.1  Term

     This agreement shall come into force and be effective as of the date hereof
and shall terminate and be of no further force and effect at such time as no
Exchangeable Shares (or securities or rights convertible into or exchangeable
for or carrying rights to acquire Exchangeable Shares) are held by any person or
entity other than SMTC and any of its Affiliates.

4.2  Amendments, Modifications

     This agreement may not be amended or modified except by an agreement in
writing executed by SMTC Canada, SMTC Nova Scotia and SMTC and approved by the
holders of the Exchangeable Shares in accordance with Section 10.2 of the
Exchangeable Share Provisions.

4.3  Ministerial Amendments

     Notwithstanding the provisions of Section 4.2, the parties to this
agreement may in writing, at any time and from time to time, without the
approval of the holders of the Exchangeable Shares, amend or modify this
agreement for the purposes of:

     (a)  adding to the covenants of any or all parties, provided that the board
          of directors of each of SMTC Canada, SMTC Nova Scotia and SMTC shall
          be of the good faith opinion that such additions will not be
          prejudicial to the rights or interests of the holders of the
          Exchangeable Shares;

     (b)  making such amendments or modifications not inconsistent with this
          agreement as may be necessary or desirable with respect to matters or
          questions which, in the good faith opinion of the board of directors
          of each of SMTC Canada, SMTC Nova Scotia and SMTC, it may be expedient
          to make, provided that each such board of directors shall be of the
          good faith opinion that such amendments or modifications will not be
          prejudicial to the rights or interests of the holders of the
          Exchangeable Shares; or

     (c)  making such changes or corrections which, on the advice of counsel to
          SMTC Canada, SMTC Nova Scotia and SMTC, are required for the purpose
          of curing or correcting any ambiguity or defect or inconsistent
          provision or clerical omission or mistake or manifest error, provided
          that the board of directors of each

                                      -11-
<PAGE>

          of SMTC Canada, SMTC Nova Scotia and SMTC shall be of the good faith
          opinion that such changes or corrections will not be prejudicial to
          the rights or interests of the holders of the Exchangeable Shares.

4.4  Meeting to Consider Amendments

     SMTC Canada, at the request of SMTC or SMTC Nova Scotia, shall call a
meeting or meetings of the holders of the Exchangeable Shares for the purpose of
considering any proposed amendment or modification requiring approval pursuant
to Section 4.2. Any such meeting or meetings shall be called and held in
accordance with the bylaws of SMTC Canada, the Exchangeable Share Provisions and
all applicable laws.

4.5  Changes in Capital of SMTC and SMTC Canada

     At all times after the occurrence of any event contemplated pursuant to
Sections 2.7 and 2.8 or otherwise, as a result of which either the shares of
SMTC Common Stock or the Exchangeable Shares or both are in any way changed,
this agreement shall forthwith be amended and modified as necessary in order
that it shall apply with full force and effect, with the appropriate changes, to
all new securities into which shares of SMTC Common Stock or the Exchangeable
Shares or both are so changed and the parties hereto shall execute and deliver
an agreement in writing giving effect to and evidencing such necessary
amendments and modifications.

4.6  Amendments Only in Writing

     No amendment to or modification or waiver of any of the provisions of this
agreement otherwise permitted hereunder shall be effective unless made in
writing and signed by all of the parties hereto.

4.7  Assignment

     This agreement shall not be assignable by any party hereto.

4.8  Time

     Time shall be of the essence of this agreement.

4.9  Governing Law

     This agreement and the rights and obligations of the parties hereto shall
be governed by and construed and interpreted in accordance with the laws of the
Province of Ontario and the federal laws of Canada applicable therein.

4.10 Severability

     If any term or other provision of this agreement is invalid, illegal or
incapable of being enforced by any rule or law, or public policy, all other
conditions and provisions of this agreement shall nevertheless remain in full
force and effect so long as the economic or legal

                                      -12-
<PAGE>

substance of the transactions contemplated hereby is not affected in any manner
materially adverse to any party. Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties hereto
shall negotiate in good faith to modify this agreement so as to effect the
original intent of the parties as closely as possible in an acceptable manner to
the end that the transactions contemplated hereby are fulfilled to the fullest
extent possible.

4.11 Enurement

     This agreement shall be binding upon and enure to the benefit of the
parties hereto and their respective successors and assigns.

4.12 Notices to Parties

     All notices and other communications hereunder shall be in writing and
shall be given and shall be deemed to have been duly given at the time of
receipt, if delivered in person or sent by facsimile transmission on a Business
Day at the place of receipt (or, if given on a non-Business Day at the place of
receipt, shall be deemed to have been duly given on the next succeeding Business
Day at such place) to the parties as follows:

(a)   if to SMTC:

      SMTC Corporation
      635 Hood Road
      Markham, Ontario
      Canada L3R 4N6

      Attention:  Richard J. Smith, C.A.
                  Vice-President, Finance and Administration
      Fax:        (905) 479-5326

      with a copy to:

      Ropes & Gray
      One International Place
      Boston, Massachusetts
      U.S.A. 02110-2624

      Attention:  Alfred Rose
      Fax:        (617) 951-7050

                                      -13-
<PAGE>

     (b)  if to SMTC Canada or SMTC Nova Scotia:

          SMTC Manufacturing Corporation of Canada
          635 Hood Road
          Markham, Ontario
          Canada L3R 4N6

          Attention:  Richard J. Smith, C.A.
                      Vice-President, Finance and Administration
          Fax:        (905) 479-5326

          with a copy to:

          McMillan Binch
          Suite 3800, South Tower
          Royal Bank Plaza
          Toronto, Ontario
          Canada M5J 2J7

          Attention:  Stephen C.E. Rigby
          Fax:        (416) 865-7048

or to such other address as a party may have furnished to the others in writing
in accordance herewith, except that notices of change of address shall be
effective only upon receipt.

4.13 Counterparts

     This agreement may be executed in counterparts, each of which shall be
deemed an original, and all of which taken together shall constitute one and the
same document.

4.14 Attornment

     Each of SMTC and SMTC Nova Scotia agrees that any action or proceeding
arising out of or relating to this agreement may be instituted in the courts of
Ontario, waives any objection which it may have now or hereafter to the venue of
any such action or proceeding, irrevocably submits to the jurisdiction of the
said courts in any such action or proceeding, agrees to be bound by any judgment
of the said courts and agrees not to seek, and hereby waives, any review of the
merits of any such judgment by the court of any other jurisdiction and hereby
appoints SMTC Canada at its registered office in the Province of Ontario as its
attorney for service of process.

                                      -14-
<PAGE>

     IN WITNESS WHEREOF the parties hereto have caused this agreement to be duly
executed as of the date first above written.

                                 SMTC CORPORATION

                                 By: /s/ Paul Walker
                                     ------------------------------
                                     Name:  Paul Walker
                                     Title: President

                                 SMTC NOVA SCOTIA COMPANY

                                 By: /s/ Paul Walker
                                     ------------------------------
                                     Name:  Paul Walker
                                     Title: President

                                 SMTC MANUFACTURING CORPORATION OF CANADA

                                 By: /s/ Paul Walker
                                     ------------------------------
                                     Name:  Paul Walker
                                     Title: President

                                      -15-

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