Document:

<PAGE>   1

                                                                     EXHIBIT 4.2

THIS NOTE HAS NOT BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR
THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN
AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE
SECURITIES LAWS.

THIS NOTE IS SUBJECT TO THE TERMS OF A SUBORDINATION AGREEMENT BY MORGENTHALER
VENTURE PARTNERS V, L.P., AMPERSAND IV LIMITED PARTNERSHIP AND MOLEX
INCORPORATED IN FAVOR OF WELLS FARGO BANK MINNESOTA, NATIONAL ASSOCIATION DATED
AS OF MAY ___, 2001.

                                 SHELDAHL, INC.

                                      NOTE

$_________                                                         May __ , 2001

        FOR VALUE RECEIVED, Sheldahl, Inc., a Minnesota corporation (the
"Company"), hereby promises to pay to the order of _______________________ (the
"Holder"), the principal sum of _____________ ($________), on the Maturity Date
(as defined in the Purchase Agreement referred to below) together with interest
(computed on the basis of a 360 day year, so that 1/360th of the annualized
interest will accrue for each day that principal is outstanding) from the date
hereof until the date the unpaid balance of this Note and all amounts payable in
connection herewith have been paid to the Holder in full at the rate of interest
set forth in the Purchase Agreement. Interest may be paid quarterly on each of
March 31, June 30, September 30 and December 31 of each year, but, to the extent
not otherwise paid, interest shall be added to the principal quarterly on March
31, June 30, September 30 and December 31 of each year. All accrued interest
shall be payable in full on the date that this note is repaid in full.

        This Note is delivered as an instrument under seal.

        Payments of principal of, interest on and fees in connection with this
Note are to be made in lawful money of the United States of America as provided
in the Purchase Agreement. All amounts payable in connection herewith shall be
paid in cash on the date that this Note and all amounts payable in connection

<PAGE>   2

herewith are paid to the Holder. Payments shall be made to the Holder at such
place and by such means as provided in the Purchase Agreement.

        This Note is one of a series of notes issued pursuant to a Subordinated
Secured Notes Purchase Agreement, dated as of May ___, 2001 (as from time to
time amended, the "Purchase Agreement"), among the Company, as issuer, and the
Purchasers signatory thereto.

        This Note is entitled to the benefits of, and evidences obligations
incurred under, the Purchase Agreement, to which reference is made for a
description of the security for this Note and for a statement of the terms and
conditions relating to prepayment and repayment of the obligations evidenced
hereby. This Note may be subject to redemption prior to Maturity Date, as
provided in the Purchase Agreement.

        In case an Event of Default (as defined in the Purchase Agreement) shall
occur and be continuing, the principal of and accrued interest on this Note may
be declared to be due and payable in the manner and with the effect provided in
the Purchase Agreement.

        The Company hereby waives presentment, demand, protest or notice of any
kind in connection with this Note.

        THIS NOTE SHALL BE GOVERNED AND CONSTRUED UNDER THE LAWS OF THE
COMMONWEALTH OF MASSACHUSETTS.

                                       SHELDAHL, INC.

                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:<PAGE>   1

                                                                     EXHIBIT 4.3

     NINTH AMENDMENT TO CREDIT AND SECURITY AGREEMENT AND WAIVER OF DEFAULTS

       This Amendment, dated as of May 23, 2001, is made by and among SHELDAHL,
INC., a Minnesota corporation (the "Borrower"), WELLS FARGO BANK MINNESOTA,
NATIONAL ASSOCIATION f/k/a Norwest Bank Minnesota, National Association, a
national banking association ("Wells Fargo"; in its separate capacity as
administrative agent for the Lenders, the "Agent"), and each of the financial
institutions appearing on the signature pages hereof.

                                    Recitals

       The Borrower, the Agent and the Lenders are parties to a Credit and
Security Agreement dated as of June 19, 1998, as amended by a First Amendment to
Credit and Security Agreement dated as of November 25, 1998, a Second Amendment
to Credit and Security Agreement dated as of March 31, 1999, a Third Amendment
to Credit and Security Agreement dated as of April 5, 1999, a Fourth Amendment
to Credit and Security Agreement dated as of November 9, 1999, a Fifth Amendment
to Credit and Security Agreement dated as of June 16, 2000, a Sixth Amendment to
Credit and Security Agreement dated as of June 27, 2000, a Seventh Amendment to
Credit and Security Agreement dated as of November 7, 2000, and an Eighth
Amendment to Credit Agreement dated as of December 26, 2000 (as so amended, the
"Credit Agreement"). Capitalized terms used in these recitals have the meanings
given to them in the Credit Agreement unless otherwise specified.

       The Borrower has requested that the Lenders and the Agent consent to
certain transactions, waive certain Events of Default and that certain
amendments be made to the Credit Agreement. The Agent and the Lenders are
willing to grant the Borrower's requests pursuant to the terms and conditions
set forth herein.

       NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements herein contained, it is agreed as follows:

       1. Defined Terms. Capitalized terms used in this Amendment which are
defined in the Credit Agreement shall have the same meanings as defined therein,
unless otherwise defined herein. In addition, Section 1.1 of the Credit
Agreement is amended by adding or amending, as the case may be, the following
definitions:

              "`EBITDA' for a period means, the sum of (i) pretax earnings from
       continuing operations, (ii) Interest Expense and (iii) depreciation,
       depletion, and amortization of tangible and intangible assets, before (a)
       special extraordinary gains, (b) minority interests, and (c)
       miscellaneous gains and losses, in each case for such period, computed
       and calculated in accordance with GAAP."

<PAGE>   2

              "`Eligible Accounts' means the sum of: (i) all unpaid Accounts
       owed to the Borrower, net of any credits, and (ii) provided that neither
       an Event of Default nor a Materials Business Sale has occurred, all
       unpaid Accounts owed to IFT, net of any credits; except the following
       shall not in any event be deemed Eligible Accounts:

                     (i) that portion of Accounts (other than dated Accounts)
              unpaid 60 days or more after the due date, and that portion of
              dated Accounts unpaid 30 days or more after the stated due date or
              120 days or more after the shipping date;

                     (ii) that portion of Accounts that is disputed or subject
              to a claim of offset or a contra account;

                     (iii) that portion of Accounts not yet earned by the final
              delivery of goods or rendition of services, as applicable, by the
              Borrower or IFT to the customer;

                     (iv) Accounts owed by any unit of government, whether
              foreign or domestic (provided, however, that there shall be
              included in Eligible Accounts that portion of Accounts owed by
              such units of government for which the Borrower or IFT (as
              applicable) has provided evidence satisfactory to the Agent that
              (A) the Agent has a first priority perfected security interest and
              (B) such Accounts may be enforced by the Agent directly against
              such unit of government under all applicable laws);

                     (v) Accounts owed by an account debtor located outside the
              United States which are not backed by a bank letter of credit
              assigned to the Agent (if such assignment is required by the
              Agent), in the possession of the Agent and acceptable to the Agent
              in all respects, in its sole discretion; provided, however, that,
              Accounts due and owing from Siemens, Bosch, Delco, Ford, Texas
              Instruments, Polaroid, 3M, Hewlett Packard and Motorola which
              satisfy all other requirements of this definition (including
              without limitation clause (xiii)), shall not be deemed ineligible
              because of this clause;

                     (vi) Accounts owed by an account debtor that is insolvent,
              the subject of bankruptcy proceedings or has gone out of business;

                     (vii) Accounts owed by a shareholder, Subsidiary,
              Affiliate, officer or employee of the Borrower or IFT;

                                      -2-

<PAGE>   3

                     (viii) Accounts not subject to a duly perfected security
              interest in the Agent's favor or which are subject to any lien,
              security interest or claim in favor of any Person other than the
              Agent including without limitation any payment or performance
              bond;

                     (ix) Accounts owned by IFT until the Agent has received
              evidence satisfactory to it of the perfection and priority of its
              security interest in such Accounts;

                     (x) that portion of Accounts that has been restructured,
              extended, amended or modified;

                     (xi) that portion of Accounts that constitutes advertising,
              finance charges, service charges or sales or excise taxes;

                     (xii) Accounts owed by an account debtor, regardless of
              whether otherwise eligible, if 10% or more of the total amount due
              under Accounts from such debtor is ineligible under clauses (i),
              (ii) or (x) above, provided, however, that the Agent may from time
              to time in its sole discretion exclude from the operation of this
              clause (xii) those Accounts that the Agent designates; and;

                     (xiii) Accounts, or portions thereof, otherwise deemed
              ineligible by the Agent in its sole discretion."

              "`Eligible Inventory' means the sum of: (i) all Inventory of the
       Borrower, at the lower of cost or market value as determined in
       accordance with GAAP, and (ii) provided that neither an Event of Default
       nor a Materials Business Sale has occurred, all Inventory of IFT, at the
       lower of cost or market value as determined in accordance with GAAP;
       except the following shall not in any event be deemed Eligible Inventory:

                     (i) Inventory that is: in-transit (provided that goods in
              transit in the ordinary course of business between the Borrower's
              facilities in Brown and Marshall Counties, South Dakota, its
              facilities in Rice and Dakota Counties, Minnesota and Boulder
              County, Colorado shall not be excluded by this clause); located at
              any warehouse, job site or other premises not approved by the
              Agent in writing; located outside of the states, or localities, as
              applicable, in which the Agent has filed financing statements to
              perfect a first priority security interest in such Inventory;
              covered by any negotiable or non-negotiable warehouse receipt,
              bill of lading or other document of title not in the Agent's
              possession; on consignment from or to any Person or subject to any
              bailment;

                                      -3-

<PAGE>   4

                     (ii) Supplies, packaging, maintenance parts or sample
              Inventory;

                     (iii) Inventory that is damaged, obsolete, slow moving or
              not currently saleable in the normal course of the Borrower's or
              IFT's operations;

                     (iv) Inventory that the Borrower or IFT has returned, has
              attempted to return, is in the process of returning or intends to
              return to the vendor thereof;

                     (v) Inventory that is perishable or live;

                     (vi) Inventory manufactured by the Borrower or IFT pursuant
              to a license, other than that manufactured under a license from
              IBM, Inc., unless the applicable licensor has agreed in writing to
              permit the Agent to exercise its rights and remedies against such
              Inventory;

                     (vii) Inventory that is subject to a security interest in
              favor of any Person other than the Agent;

                     (viii) Inventory owned by IFT until the Agent has received
              evidence satisfactory to it of the perfection and priority of its
              security interest in such Inventory; and

                     (ix) Inventory otherwise deemed ineligible by the Agent in
              its sole discretion."

              "`Margin' means, from March 1, 2001 and thereafter, four percent
       (4.0%)."

              "`Materials Business Sale' means a sale by the Borrower, which
       sale is approved by the Agent and the Lenders in their sole discretion,
       of the Borrower's adhesive-based tapes, laminates and composite materials
       business, excluding Accentia, Comclad, lithium batteries products,
       Novaclad, Novaflex, Flexbase, and those products and assets associated
       with the flexible interconnect division."

              "`Molex' means Molex Incorporated."

              "`Ninth Amendment' means the Ninth Amendment to Credit and
       Security Agreement by and among the Borrower, the Lenders and the Agent
       dated as of May 23, 2001."

              "`Ninth Amendment Effective Date' means the date all conditions
       set forth in Paragraph 13 of the Ninth Amendment are satisfied."

                                      -4-

<PAGE>   5

              "`Subordinated Lender' means, individually and collectively,
       Molex, Morgenthaler and Ampersand."

       2. Term Note Payments. Section 2.10 is amended by deleting and replacing
such section in its entirety as follows:

              Section 2.10 Payment of Term Notes. The principal of the Term
       Notes will be payable in aggregate equal monthly installments of $205,130
       beginning January 1, 1999 and on the first day of each month thereafter
       until the Termination Date at which time the outstanding principal
       balance of the Term Notes and all interest accrued thereon shall be due
       and payable in full. The Agent has obtained, at the Borrower's expense,
       an appraisal of the Eligible Equipment and all equipment owned by all
       Subsidiaries of the Borrower following the Merger (the "Combined
       Equipment") which has established that the aggregate outstanding
       principal balance of the Term Notes exceeds 75% of the orderly
       liquidation value of the Combined Equipment as shown on such appraisal.
       Upon the earlier of: (i) the occurrence of an Event of Default, (ii) the
       occurrence of a Materials Business Sale, (iii) the date of any
       refinancing of the Obligations by any lender other than the Lenders or
       (iv) July 30, 2001, the Borrower shall immediately prepay the Term Notes
       in the amount of such excess together with any prepayment fee owed
       pursuant to Section 2.16.

       3. Financial Covenants. Sections 6.18 through 6.21 of the Credit
Agreement are amended to read as set forth below.

              "Section 6.18 - Reserved"

              "Section 6.19 - Reserved"

              "Section 6.20 - Reserved"

              "Section 6.21 Minimum EBITDA. The Borrower will achieve during the
       period described below, EBITDA, of not less than the amount set forth
       opposite such period:

<TABLE>
      <S>                                            <C>
        March 30, 2001 through
             May 3, 2001                             $(5,000,000)

        March 30, 2001 through
             May 31, 2001                            $(5,000,000)

        March 30, 2001 through
             June 29, 2001                           $(5,000,000)
</TABLE>

                                      -5-

<PAGE>   6

       4. New Compliance Certificate. Exhibit F to the Credit Agreement is
hereby amended in its entirety and replaced by Exhibit A to this Amendment.

       5. Other Affirmative Covenants. Article 6 is amended by adding the
following Sections 6.23, 6.24 and 6.25:

              "Section 6.23 Sale Commitment Information. By May 23, 2001, the
       Borrower will deliver to the Agent a copy of an engagement letter from a
       reputable investment banking firm retained by the Borrower to broker a
       Materials Business Sale. By June 15, 2001, the Borrower will deliver to
       the Agent a copy of those written materials prepared by such investment
       banking firm regarding such Materials Business Sale.

              Section 6.24 Potential Sale Updates. Prior to the close of
       business on Friday of each week following the date of the Ninth
       Amendment, the Borrower will deliver to the Agent, in form and detail
       acceptable to the Agent, progress reports regarding any potential
       Materials Business Sale; simultaneously, upon request by the Agent, the
       Borrower will deliver to the Agent those documents deemed by the Agent to
       be material to any such potential Materials Business Sale.

              Section 6.25 Sale Documentation. Prior to a Materials Business
       Sale, the Borrower will deliver to the Agent: (i) a copy of the final
       proposed purchase agreement to consummate such Materials Business Sale,
       (ii) a calculation of the Borrowing Base prior to giving effect to such
       proposed Materials Business Sale and (iii) a calculation of the Borrowing
       Base after giving effect to such proposed Materials Business Sale."

       6. Expressed Consent. Section 7.1 of the Credit Agreement is amended by
replacing the final period with "; and" and inserting the following new
subsection (f):

              "(f) a lien in favor of the Subordinated Lender on all assets,
       other than real property assets, including but not limited to
       Manufacturing Fixtures (as defined in the Subordinated Secured Notes
       Purchase Agreement, dated as of May 18, 2001, by and among the Borrower
       and the Subordinated Lender) of the Borrower, its Affiliates and its
       Subsidiaries, including but not limited to IFT, which lien shall be
       junior to the interest of the Agent and the Lenders, and which lien shall
       be automatically released upon the closing of the sale of any such assets
       to any bona fide purchaser approved by the Agent. Following such a sale
       contemplated in this subsection 7.1(f), the Subordinated Lender may hold
       a lien on only those proceeds of such sale which are in excess of the
       Obligations."

                                      -6-

<PAGE>   7

       7. New Subordinated Debt. Section 7.2 of the Credit Agreement is amended
to add the following new subsection (b-1) immediately following subsection (b):

              "(b-1) indebtedness to be used for general corporate purposes and
       working capital only not exceeding a principal amount of $5,000,000 and
       subordinated to the Obligations pursuant to a subordination agreement
       satisfactory to the Agent in its sole discretion, with the Borrower's
       obligation to pay such indebtedness being evidenced by instruments (which
       may be assigned) notifying any holder thereof of such subordination."

       8. Events of Default. Subsection 8.1(t) of the Credit Agreement is
amended by replacing the final period with "; or" and inserting the following
new subsections (u), (v) and (w):

              "(u) By July 16, 2001, the Subordinated Lender shall not have
       indicated to the Agent in writing their continuing commitment to
       consummate a Materials Business Sale and the Borrower has not provided
       the Agent with a written offer proposing a Materials Business Sale from
       another bona fide purchaser;

              (v) By June 29, 2001, the Borrower shall fail to deliver to the
       Agent financial projections for the period from June 30, 2001 through
       December 31, 2001;

              (w) By July 20, 2001, the Agent, the Lenders and the Borrower
       shall fail to establish, for the period from July 20, 2001 through
       December 31, 2001: (i) a new definition for Borrowing Base in Section 1.1
       and (ii) new financial covenants in Article 6."

       9. No Other Changes. Except as explicitly amended by this Amendment, all
of the terms and conditions of the Credit Agreement shall remain in full force
and effect and shall apply to any advance or letter of credit thereunder.

       10. Expressed Consent to New Subordinated Debt. Notwithstanding any
language in the Credit Agreement, including but not limited to Sections 7.2 and
7.9, the Agent and the Lenders hereby consent to the Borrower's incurring
indebtedness in the principal amount of $5,000,000, which indebtedness shall be
owed to the Subordinated Lender and which indebtedness shall be fully
subordinated to the Obligations pursuant to a Subordination Agreement of even
date herewith by the Subordinated Lender for the benefit of the Agent on behalf
of the Lenders.

                                      -7-

<PAGE>   8

       11. Defaults. The following Events of Default exist (the "Existing
Defaults"):

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------
CREDIT AGREEMENT SECTION/COVENANT                REQUIRED AS OF 3/30/01                   ACTUAL AS OF 3/30/01
----------------------------------------------------------------------------------------------------------------------
<S>                                              <C>                                      <C>
Section 6.18 Minimum Cash Flow
Available for Debt Service                           $12,600,000                                $9,212,000
----------------------------------------------------------------------------------------------------------------------

Section 6.19 Minimum Debt Service
Coverage Ratio                                      1.50 to 1.00                               1.43 to 1.00
----------------------------------------------------------------------------------------------------------------------

Section 6.20 Pre-Tax Net Income                     $(4,000,000)                               $(11,772,000)
----------------------------------------------------------------------------------------------------------------------
</TABLE>

Upon the terms and subject to the conditions set forth in this Amendment, the
Lenders hereby waive the Existing Defaults. This waiver shall be effective only
in this specific instance and for the specific purpose for which it is given,
and this waiver shall not entitle the Borrower to any other or further waiver in
any similar or other circumstances.

       12. Amendment Fee. In consideration of the Lenders' execution of this
Amendment, the Borrower shall pay the Agent a fully earned, non-refundable fee
in the amount of $300,000, which fee shall be paid as follows: (a) $150,000
shall be paid as of the date hereof; (b) $150,000 shall be paid on the earlier
of: (i) the occurrence of an Event of Default, (ii) the occurrence of a
Materials Business Sale, (iii) the date of any refinancing of the Obligations by
any lender other than the Lenders or (iv) July 30, 2001.

       13. Conditions Precedent. This Amendment, and the waiver set forth in
Paragraph 11 hereof, shall be effective when the following conditions have been
met to the satisfaction of the Agent:

              (a) the Agent shall have received an executed original hereof;

              (b) the Agent shall have received those executed documents
       necessary for the Lenders to properly perfect their liens against the
       intellectual property of the Borrower and IFT;

              (c) the Agent shall have received, in form and content
       satisfactory to the Agent, a mortgage from the Borrower securing the
       Obligations with the Borrower's Britton, South Dakota facility and real
       property;

              (d) the Agent shall have received, in form and content
       satisfactory to the Agent, an unconditional, limited guaranty from Molex
       Incorporated in the amount of $1,000,000;

              (e) the Agent shall have received, in form and content
       satisfactory to the Agent, a subordination agreement from the
       Subordinated Lender with respect to a $5,000,000 loan to the Borrower,
       including but not limited to a subordination and deferral of any fees to
       be charged by the Subordinated Lender. Such loan may be secured by a lien
       junior to the interest of the Agent and the Lenders on those assets of

                                      -8-

<PAGE>   9

       the Borrower other than real property assets; but such lien shall be
       automatically released upon the closing of the sale of any such assets to
       any bona fide purchaser approved by the Agent, and the Subordinated
       Lender shall have no further rights or interests in such assets. At the
       request of the Agent or the Borrower, the Subordinated Lender shall
       execute and deliver all documents evidencing and effectuating such
       release of any security interests. Thereafter, the loan from the
       Subordinated Lender may be secured by a lien which shall attach only to
       those proceeds of the sale contemplated in this subparagraph (e) which
       proceeds are in excess of the Obligations.

       14. Representations and Warranties. The Borrower hereby represents and
warrants to the Lenders as follows:

              (a) The Borrower has all requisite corporate power and authority
       to execute this Amendment and to perform all of its obligations
       hereunder, and this Amendment has been duly executed and delivered by the
       Borrower and constitutes the legal, valid and binding obligation of the
       Borrower, enforceable in accordance with its terms.

              (b) The execution, delivery and performance by the Borrower of
       this Amendment have been duly authorized by all necessary corporate
       action and do not (i) require any authorization, consent or approval by
       any governmental department, commission, board, bureau, agency or
       instrumentality, domestic or foreign, (ii) violate any provision of any
       law, rule or regulation or of any order, writ, injunction or decree
       presently in effect, having applicability to the Borrower, or the
       articles of incorporation or by-laws of the Borrower, or (iii) result in
       a breach of or constitute a default under any indenture or loan or credit
       agreement or any other agreement, lease or instrument to which the
       Borrower is a party or by which it or its properties may be bound or
       affected.

              (c) All of the representations and warranties contained in Article
       V of the Credit Agreement are correct on and as of the date hereof as
       though made on and as of such date, except to the extent that such
       representations and warranties relate solely to an earlier date.

       15. References. All references in the Credit Agreement to "this
Agreement" shall be deemed to refer to the Credit Agreement as amended hereby;
and any and all references in the Security Documents to the Credit Agreement
shall be deemed to refer to the Credit Agreement as amended hereby.

       16. No Other Waiver. Except as set forth in Paragraph 11, the execution
of this Amendment and acceptance of any documents related hereto shall not be
deemed to be a waiver of any Default or Event of Default under the Credit
Agreement or breach, default or event of default under any Security Document or
other document held by the Lenders, whether or not known to the Lenders and
whether or not existing on the date of this Amendment.

                                       -9-

<PAGE>   10

       17. Release. The Borrower hereby absolutely and unconditionally releases
and forever discharges the Lenders, and any and all participants, parent
corporations, subsidiary corporations, affiliated corporations, insurers,
indemnitors, successors and assigns thereof, together with all of the present
and former directors, officers, agents and employees of any of the foregoing,
from any and all claims, demands or causes of action of any kind, nature or
description, whether arising in law or equity or upon contract or tort or under
any state or federal law or otherwise, which the Borrower has had, now has or
has made claim to have against any such person for or by reason of any act,
omission, matter, cause or thing whatsoever arising from the beginning of time
to and including the date of this Amendment, whether such claims, demands and
causes of action are matured or unmatured or known or unknown.

       18. Costs and Expenses. The Borrower hereby reaffirms its agreement under
the Credit Agreement to pay or reimburse the Lenders on demand for all costs and
expenses incurred by the Lenders in connection with the Credit Agreement, the
Security Documents and all other documents contemplated thereby, including
without limitation all reasonable fees and disbursements of legal counsel.
Without limiting the generality of the foregoing, the Borrower specifically
agrees to pay all fees and disbursements of counsel to the Lenders for the
services performed by such counsel in connection with the preparation of this
Amendment and the documents and instruments incidental hereto. The Borrower
hereby agrees that the Lenders may, at any time or from time to time in its sole
discretion and without further authorization by the Borrower, make a loan to the
Borrower under the Credit Agreement, or apply the proceeds of any loan, for the
purpose of paying any such fees, disbursements, costs and expenses, including
without limitation the fee owed under Paragraph 12.

                                      -10-

<PAGE>   11

       19. Miscellaneous. This Amendment may be executed in any number of
counterparts, each of which when so executed and delivered shall be deemed an
original and all of which counterparts, taken together, shall constitute one and
the same instrument.

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

WELLS FARGO BANK MINNESOTA,                     SHELDAHL, INC.
  NATIONAL ASSOCIATION, as Agent

By /s/ Perry T. Larson                          By /s/ Peter Duff
   -----------------------------                   -----------------------------
   Perry T. Larson                                 Peter Duff
   Its Vice President                              Its Vice President - Finance

WELLS FARGO BANK MINNESOTA,                     THE CIT GROUP/EQUIPMENT
  NATIONAL ASSOCIATION                            FINANCING, INC.

By /s/ Perry T. Larson                          By /s/ William B. Stoebig
   -----------------------------                   -----------------------------
   Perry T. Larson                                 William B. Stoebig
   Its Vice President                              Its Vice President

                                      -11-

<PAGE>   12

                                                 Exhibit A to Ninth Amendment to
                                                 Amended and Restated Credit and
                                                 Security Agreement

                             COMPLIANCE CERTIFICATE

TO:      Perry T. Larson
         Wells Fargo Bank Minnesota, National Association

DATE:    ____________________, ______

SUBJECT: Financial Statements

Dear Mr. Larson:

       I am the duly qualified and acting Chief Financial Officer of Sheldahl,
Inc. (the "Borrower") and I am familiar with the financial statements and
financial affairs of the Borrower. I am authorized to execute this Compliance
Certificate on behalf of the Borrower.

       Pursuant to Section 6.1 of the Credit and Security Agreement dated as of
June 19, 1998, by and among the Borrower, Wells Fargo Bank Minnesota, National
Association, as agent ("Wells Fargo"; herein in such capacity, together with any
party which may become the successor Agent under such Credit and Security
Agreement, the "Agent"), and each of the financial institutions which are now or
may hereafter become parties to such Credit and Security Agreement, as amended
to date and as the same may be further amended, supplemented or restated from
time to time, the "Credit Agreement"), enclosed are an unaudited balance sheet
and statements of income and retained earnings of the Borrower, as of
___________, ____ (the "Reporting Date"), and for the year-to-date period ending
on the Reporting Date. All terms used in this Compliance Certificate shall have
the meanings given in the Credit Agreement.

       The balance sheet and statements of income and retained earnings fairly
present the financial condition of the Borrower as of the date thereof. They
have been prepared in accordance with GAAP.

       I hereby certify to the Lenders as follows:

       [ ]    The undersigned does not have knowledge of the occurrence of a
              Default or Event of Default under the Credit Agreement.

                                      -12-

<PAGE>   13

       [ ]    The undersigned has knowledge of the occurrence of a Default or
              Event of Default under the Credit Agreement and attached hereto is
              a statement of the facts with respect thereto.

              I further certify to the Lenders as follows:

              1. Minimum EBITDA. Pursuant to Section 6.21 of the Credit
       Agreement, as of the Reporting Date, the Borrower's Cash Flow Available
       for Debt Service was $_____________, which [ ] satisfies [ ] does not
       satisfy the requirement that such amount be no less than $(5,000,000).

              2. Capital Expenditures. Pursuant to Section 7.12 of the Credit
       Agreement, for the fiscal quarter ending on the Reporting Date, the
       Borrower and its Subsidiaries have expended or contracted to expend for
       Capital Expenditures, $__________________ in the aggregate, excluding the
       conversion of any existing operating leases to capital leases, which [ ]
       satisfies [ ] does not satisfy the requirement that such expenditures not
       exceed in the aggregate the amount set forth below for such fiscal
       quarter:

<TABLE>
<CAPTION>
  Fiscal Quarter Ending on or about           Maximum Capital Expenditures
  ---------------------------------           ----------------------------
  <S>                                         <C>
            March 31, 2001                             $5,000,000
            June 30, 2001                             $10,000,000
          September 30, 2001                          $16,000,000
          December 31, 2001                           $16,000,000
</TABLE>

Attached hereto are all relevant facts in reasonable detail to evidence, and the
computations of the financial covenants referred to above. These computations
were made in accordance with GAAP.

                                       SHELDAHL, INC.

                                       By
                                          --------------------------------------
                                          Its Vice President - Finance

                                      -13-

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