<PAGE>

                                                                    EXHIBIT 4.26

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF
ANY STATE AND, EXCEPT AND PURSUANT TO THE PROVISIONS OF ARTICLE 5 BELOW, MAY NOT
BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND
UNTIL REGISTERED UNDER SAID ACT AND APPLICABLE STATE SECURITIES LAW OR, IN THE
OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF
THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS
EXEMPT FROM REGISTRATION.

                            WARRANT TO PURCHASE STOCK

Company: Superconductor Technologies Inc., a California corporation
Number of Shares: Warrant Coverage (see below)
Class of Stock: Common
Warrant Price: Is the price per share on the Warrant Effective Date
Issue Date: is the Warrant Effective Date, which is the date Holder executes
            this Warrant
Expiration Date: is the 7th anniversary of the Issue Date

Warrant Coverage shall be defined as 2.00% of 5,000,000.

         THIS WARRANT CERTIFIES THAT, for the agreed upon value of $1.00 and for
other good and valuable consideration, SILICON VALLEY BANK ("Holder") is
entitled to purchase the number of fully paid and nonassessable shares of the
class of securities (the "Shares") of the company (the "Company") at the Warrant
Price all as set forth above and as adjusted pursuant to Article 2 of this
Warrant, subject to the provisions and upon the terms and conditions set forth
in this Warrant.

ARTICLE 1. EXERCISE.

                  1.1      Method of Exercise. Holder may exercise this Warrant
by delivering a duly executed Notice of Exercise in substantially the form
attached as Appendix 1 to the principal office of the Company. Unless Holder is
exercising the conversion right set forth in Article 1.2, Holder shall also
deliver to the Company a check, wire transfer (to an account designated by the
Company), or other from of payment acceptable to the Company for the aggregate
Warrant Price for the Shares being purchased.

                  1.2      Conversion Right. In lieu of exercising this Warrant
as specified in Article 1.1, Holder may from time to time convert this Warrant,
in whole or in part, into a number of Shares determined by dividing (a) the
aggregate fair market value of the Shares or other securities otherwise issuable
upon exercise of this Warrant minus the aggregate Warrant Price of such Shares
by (b) the fair market value of one Share. The fair market value of the Shares
shall be determined pursuant to Article 1.3.

                  1.3      Fair Market Value. If the Company's common stock is
traded in a public market and the shares are common stock, the fair market value
of each Share shall be the closing price of a Share reported for the business
day immediately before Holder delivers its Notice of Exercise to the Company (or
in the instance where the Warrant is exercised immediately prior to the
effectiveness of the Company's initial public offering, the "price to public"
per share price specified in the final prospectus relating to such offering). If
the Company's common stock is traded in a public market and the Shares are
preferred stock, the fair market value of a Share shall be the closing price of
a share of the Company's common stock reported for the business day immediately
before Holder delivers its Notice of Exercise to the Company (or, in the
instance where the Warrant is exercised immediately prior to the effectiveness
of the

                                      1

<PAGE>

Company's initial public offering, the initial "price to public" per share price
specified in the final prospectus relating to such offering), in both cases,
multiplied by the number of shares of the Company's common stock into which a
Share is convertible. If the Company's common stock is not traded in a public
market, the Board of Directors of the Company shall determine fair market value
in its reasonable good faith judgment.

                  1.4      Delivery of Certificate and New Warrant. Promptly
after Holder exercises or converts this Warrant and, if applicable, the Company
receives payment of the aggregate Warrant Price, the Company shall deliver to
Holder certificates for the Shares acquired and, if this Warrant has not been
fully exercised or converted and has not expired, a new Warrant representing the
Shares not so acquired.

                  1.5      Replacement of Warrants. On receipt of evidence
reasonably satisfactory to the Company of the loss, theft, destruction or
mutilation of this Warrant and, in the case of loss, theft or destruction, on
delivery of an indemnity agreement reasonably satisfactory in form and amount to
the Company or, in the case of mutilation, or surrender and cancellation of this
Warrant, the Company shall execute and deliver, in lieu of this Warrant, a new
warrant of like tenor.

                  1.6      Treatment of Warrant Upon Acquisition of Company.

                           1.6.1    "Acquisition". For the purpose of this
Warrant, "Acquisition" means any sale, license, or other disposition of all or
substantially all of the assets of the Company, or any reorganization,
consolidation, or merger of the Company where the holders of the Company's
securities before the transaction beneficially own less than 50% of the
outstanding voting securities of the surviving entity after the transaction.

                           1.6.2    Treatment of Warrant at Acquisition.

A)       Upon the written request of the Company, Holder agrees that, in the
event of an Acquisition in which the sole consideration is cash, either (a)
Holder shall exercise its conversion or purchase right under this Warrant and
such exercise will be deemed effective immediately prior to the consummation of
such Acquisition or (b) if Holder elects not to exercise the Warrant, this
Warrant will expire upon the consummation of such Acquisition. The Company shall
provide the Holder with written notice of its request relating to the foregoing
(together with such reasonable information as the Holder may request in
connection with such contemplated Acquisition giving rise to such notice), which
is to be delivered to Holder not less than ten (10) days prior to the closing of
the proposed Acquisition.

B)       Upon the written request of the Company, Holder agrees that, in the
event of an Acquisition that is an "arms length" sale of all or substantially
all of the Company's assets (and only its assets) to a third party that is not
an Affiliate (as defined below) of the Company (a "True Asset Sale"), either (a)
Holder shall exercise its conversion or purchase right under this Warrant and
such exercise will be deemed effective immediately prior to the consummation of
such Acquisition or (b) if Holder elects not to exercise the Warrant, this
Warrant will continue until the Expiration Date if the Company continues as a
going concern following the closing of any such True Asset Sale. The Company
shall provide the Holder with written notice of its request relating to the
foregoing (together with such reasonable information as the Holder may request
in connection with such contemplated Acquisition giving rise to such notice),
which is to be delivered to Holder not less than ten (10) days prior to the
closing of the proposed Acquisition.

C)       Upon the closing of any Acquisition other than those particularly
described in subsections (A) and (B) above, the successor entity shall assume
the obligations of this Warrant, and this Warrant shall be exercisable for the
same securities, cash, and property as would be payable for the Shares issuable
upon exercise of the unexercised portion of this Warrant as if such Shares

                                        2

<PAGE>

were outstanding on the record date for the Acquisition and subsequent closing.
The Warrant Price and/or number of Shares shall be adjusted accordingly.

As used herein "Affiliate" shall mean any person or entity that owns or controls
directly or indirectly ten (10) percent or more of the stock of Company, any
person or entity that controls or is controlled by or is under common control
with such persons or entities, and each of such person's or entity's officers,
directors, joint venturers or partners, as applicable.

ARTICLE 2. ADJUSTMENTS TO THE SHARES.

                  2.1      Stock Dividends, Splits, Etc. If the Company declares
or pays a dividend on the Shares payable in common stock, or other securities,
then upon exercise of this Warrant, for each Share acquired, Holder shall
receive, without cost to Holder, the total number and kind of securities to
which Holder would have been entitled had Holder owned the Shares of record as
of the date the dividend occurred. If the Company subdivides the Shares by
reclassification or otherwise into a greater number of shares or takes any other
action which increase the amount of stock into which the Shares are convertible,
the number of shares purchasable hereunder shall be proportionately increased
and the Warrant Price shall be proportionately decreased. If the outstanding
shares are combined or consolidated, by reclassification or otherwise, into a
lesser number of shares, the Warrant Price shall be proportionately increased
and the number of Shares shall be proportionately decreased.

                  2.2      Reclassification, Exchange, Combinations or
Substitution. Upon any reclassification, exchange, substitution, or other event
that results in a change of the number and/or class of the securities issuable
upon exercise or conversion of this Warrant, Holder shall be entitled to
receive, upon exercise or conversion of this Warrant, the number and kind of
securities and property that Holder would have received for the Shares if this
Warrant had been exercised immediately before such reclassification, exchange,
substitution, or other event. Such an event shall include any automatic
conversion of the outstanding or issuable securities of the Company of the same
class or series as the Shares to common stock pursuant to the terms of the
Company's Articles or Certificate (as applicable) of Incorporation upon the
closing of a registered public offering of the Company's common stock. The
Company or its successor shall promptly issue to Holder an amendment to this
Warrant setting forth the number and kind of such new securities or other
property issuable upon exercise or conversion of this Warrant as a result of
such reclassification, exchange, substitution or other event that results in a
change of the number and/or class of securities issuable upon exercise or
conversion of this Warrant. The amendment to this Warrant shall provide for
adjustments which shall be as nearly equivalent as may be practicable to the
adjustments provided for in this Article 2 including, without limitation,
adjustments to the Warrant Price and to the number of securities or property
issuable upon exercise of the new Warrant. The provisions of this Article 2.2
shall similarly apply to successive reclassifications, exchanges, substitutions,
or other events.

                  2.3      Intentionally Omitted.

                  2.4      No Impairment. The Company shall not, by amendment of
its Articles or Certificate (as applicable) of Incorporation or through a
reorganization, transfer of assets, consolidation, merger, dissolution, issue,
or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed under
this Warrant by the Company, but shall at all times in good faith assist in
carrying out of all the provisions of this Article 2 and in taking all such
action as may be necessary or appropriate to protect Holder's rights under this
Article against impairment.

                  2.5      Fractional Shares. No fractional Shares shall be
issuable upon exercise or conversion of the Warrant and the number of Shares to
be issued shall be rounded down to the nearest whole Share. If a fractional
share interest arises upon any exercise or conversion of

                                        3

<PAGE>

the Warrant, the Company shall eliminate such fractional share interest by
paying Holder the amount computed by multiplying the fractional interest by the
fair market value of a full Share.

                  2.6      Certificate as to Adjustments. Upon each adjustment
of the Warrant Price, the Company shall promptly notify Holder in writing, and,
at the Company's expense, promptly compute such adjustment, and furnish Holder
with a certificate of its Chief Financial Officer setting forth such adjustment
and the facts upon which such adjustment is based. The Company shall, upon
written request, furnish Holder a certificate setting forth the Warrant Price in
effect upon the date thereof and the series of adjustments leading to such
Warrant Price.

ARTICLE 3. REPRESENTATIONS AND COVENANTS OF THE COMPANY.

                  3.1      Representations and Warranties. The Company
represents and warrants to the Holder as follows:

                           (a)      The initial Warrant Price referenced on the
first page of this Warrant is not greater than the fair market value of the
Shares as of the date of this Warrant.

                           (b)      All Shares which may be issued upon the
exercise of the purchase right represented by this Warrant, and all securities,
if any, issuable upon conversion of the Shares, shall, upon issuance, be duly
authorized, validly issued, fully paid and nonassessable, and free of any liens
and encumbrances except for restrictions on transfer provided for herein or
under applicable federal and state securities laws.

                           (c)      The Capitalization Table previously provided
to Holder remains true and complete as of the Issue Date.

                  3.2      Notice of Certain Events. If the Company proposes at
any time (a) to declare any dividend or distribution upon any of its stock,
whether in cash, property, stock, or other securities and whether or not a
regular cash dividend; (b) to offer for sale additional shares of any class or
series of the Company's stock; (c) to effect any reclassification or
recapitalization of any of its stock; (d) to merge or consolidate with or into
any other corporation, or sell, lease, license, or convey all or substantially
all of its assets, or to liquidate, dissolve or wind up; or (e) offer holders of
registration rights the opportunity to participate in an underwritten public
offering of the company's securities for cash, then, in connection with each
such event, the Company shall give Holder: (1) at least 10 days prior written
notice of the date on which a record will be taken for such dividend,
distribution, or subscription rights (and specifying the date on which the
holders of common stock will be entitled thereto) or for determining rights to
vote, if any, in respect of the matters referred to in (c) and (d) above; (2) in
the case of the matters referred to in (c) and (d) above at least 10 days prior
written notice of the date when the same will take place (and specifying the
date on which the holders of common stock will be entitled to exchange their
common stock for securities or other property deliverable upon the occurrence of
such event); and (3) in the case of the matter referred to in (e) above, the
same notice as is given to the holders of such registration rights.

                  3.3      Registration Under Securities Act of 1933, as
amended. The Company agrees that the Shares or, if the Shares are convertible
into common stock of the Company, such common stock, shall be subject to the
registration rights set forth on Exhibit A.

                  3.4      No Shareholder Rights. Except as provided in this
Warrant, the Holder will not have any rights as a shareholder of the Company
until the exercise of this Warrant.

ARTICLE 4. REPRESENTATIONS, WARRANTIES OF THE HOLDER. The Holder represents and
warrants to the Company as follows:

                                        4

<PAGE>

                  4.1      Purchase for Own Account. This Warrant and the
securities to be acquired upon exercise of this Warrant by the Holder will be
acquired for investment for the Holder's account, not as a nominee or agent, and
not with a view to the public resale or distribution within the meaning of the
Act. Holder also represents that the Holder has not been formed for the specific
purpose of acquiring this Warrant or the Shares.

                  4.2      Disclosure of Information. The Holder has received or
has had full access to all the information it considers necessary or appropriate
to make an informed investment decision with respect to the acquisition of this
Warrant and its underlying securities. The Holder further has had an opportunity
to ask questions and receive answers from the Company regarding the terms and
conditions of the offering of this Warrant and its underlying securities and to
obtain additional information (to the extent the Company possessed such
information or could acquire it without unreasonable effort or expense)
necessary to verify any information furnished to the Holder or to which the
Holder has access.

                  4.3      Investment Experience. The Holder understands that
the purchase of this Warrant and its underlying securities involves substantial
risk. The Holder has experience as an investor in securities of companies in the
development stage and acknowledges that the Holder can bear the economic risk of
such Holder's investment in this Warrant and its underlying securities and has
such knowledge and experience in financial or business matters that the Holder
is capable of evaluating the merits and risks of its investment in this Warrant
and its underlying securities and/or has a preexisting personal or business
relationship with the Company and certain of its officers, directors or
controlling persons of a nature and duration that enables the Holder to be aware
of the character, business acumen and financial circumstances of such persons.

                  4.4      Accredited Investor Status. The Holder is an
"accredited investor" within the meaning of Regulation D promulgated under the
Act.

                  4.5      The Act. The Holder understands that this Warrant and
the Shares issuable upon exercise or conversion hereof have not been registered
un the Act in reliance upon a specific exemption therefrom, which exemption
depends upon, among other things, the bona fide nature of the Holder's
investment intent as expressed herein. The Holder understands that this Warrant
and the Shares issued upon any exercise or conversion hereof must be held
indefinitely unless subsequently registered under the 1933 Act and qualified
under applicable state securities laws, or unless exemption from such
registration and qualification are otherwise available.

ARTICLE 5. MISCELLANEOUS.

                  5.1      Term: This Warrant is exercisable in whole or in part
at any time and from time to time on or before the Expiration Date.

                  5.2      Legends. This Warrant and the Shares (and the
securities issuable, directly or indirectly, upon conversion of the Shares, if
any) shall be imprinted with a legend in substantially the following form:

                  THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN
                  REGISTERED UNDER THE ACT, OR THE SECURITIES LAWS OF ANY STATE
                  AND, EXCEPT AND PURSUANT TO THE PROVISIONS OF ARTICLE 5 BELOW,
                  MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR
                  HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND
                  APPLICABLE STATE SECURITIES LAW OR, IN THE OPINION OF LEGAL
                  COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF
                  THESE SECURITIES, SUCH OFFER, SALE OR

                                        5

<PAGE>

                  TRANSFER, PLEDGE OR HYPOTHECATION IS EXEMPT FROM REGISTRATION.

                  5.3      Compliance with Securities Laws on Transfer. This
Warrant and the Shares issuable upon exercise of this Warrant (and the
securities issuable, directly or indirectly, upon conversion of the Shares, if
any) may not be transferred or assigned in whole or in part without compliance
with applicable federal and state securities laws by the transferor and the
transferee (including, without limitation, the delivery of investment
representation letters and legal opinions reasonably satisfactory to the
Company, as reasonably requested by the Company). The Company shall not require
Holder to provide an opinion of counsel if the transfer is to Silicon Valley
Bancshares (Holder's parent company) or any other affiliate of Holder.
Additionally, the Company shall also not require an opinion of counsel if there
is no material question as to the availability of current information as
referenced in Rule 144(c), Holder represents that it has complied with Rule
144(d) and (e) in reasonable detail, the selling broker represents that it has
complied with Rule 144(f), and the Company is provided with a copy of Holder's
notice of proposed sale.

                  5.4      Transfer Procedure. Upon receipt by Holder of the
executed Warrant, Holder will transfer all of this Warrant to Silicon Valley
Bancshares, Holder's parent company, by execution of an Assignment substantially
in the form of Appendix 2. Subject to the provisions of Article 5.3 and upon
providing Company with written notice, Silicon Valley Bancshares and any
subsequent Holder may transfer all or part of this Warrant or the Shares
issuable upon exercise of this Warrant (or the Shares issuable directly or
indirectly, upon conversion of the Shares, if any) to any transferee, provided,
however, in connection with any such transfer, Silicon Valley Bancshares or any
subsequent Holder will give the Company notice of the portion of the Warrant
being transferred with the name, address and taxpayer identification number of
the transferee and Holder will surrender this Warrant to the Company for
reissuance to the transferee(s) (and Holder if applicable). The Company may
refuse to transfer this Warrant or the Shares to any person who directly
competes with the Company, unless, in either case, the stock of the Company is
publicly traded.

                  5.5      Notices. All notices and other communications from
the Company to the Holder, or vice versa, shall be deemed delivered and
effective when given personally or mailed by first-class registered or certified
mail, postage prepaid, at such address as may have been furnished to the Company
or the Holder, as the case may (or on the first business day after transmission
by facsimile) be, in writing by the Company or such holder from time to time.
Effective upon receipt of the fully executed Warrant and the initial transfer
described in Article 5.4 above, all notices to the Holder shall be addressed as
follows until the Company receives notice of a change of address in connection
with a transfer or otherwise:

                           Silicon Valley Bancshares
                           Attn: Treasury Department
                           3003 Tasman Drive, HA 200
                           Santa Clara, CA 95054
                           Telephone: 408-654-7400
                           Facsimile: 408-496-2405

         Notice to the Company shall be addressed as follows until the Holder
receives notice of a change in address:

                           Superconductor Technologies
                           Attn: Martin S. McDermut
                           460 Ward Drive
                           Santa Barbara, CA 93111-2310
                           Telephone (805) 690-4539
                           Facsimile: (805) 682-9496

                                        6

<PAGE>

                  5.6      Waiver. This Warrant and any term hereof may be
changed, waived, discharged or terminated only by an instrument in writing
signed by the party against which enforcement of such change, waiver, discharge
or termination is sought.

                  5.7      Attorney's Fees. In the event of any dispute between
the parties concerning the terms and provisions of this Warrant, the party
prevailing in such dispute shall be entitled to collect from the other party all
costs incurred in such dispute, including reasonable attorney's fees.

                  5.8      Automatic Conversion upon Expiration. In the event
that, upon the Expiration Date, the fair market value of one Share (or other
security issuable upon the exercise hereof) as determined in accordance with
Section 1.3 above is greater than the Exercise Price in effect on such date,
then this Warrant shall automatically be deemed on and as of such date to be
converted pursuant to Section 1.2 above as to all Shares (or such other
securities) for which it shall not previously have been exercised or converted,
and the Company shall promptly deliver a certificate representing the Shares (or
such other securities) issued upon such conversion to the Holder.

                  5.9      Counterparts. This Warrant may be executed in
counterparts, all of which together shall constitute one and the same agreement.

                  5.10     Governing Law. This Warrant shall be governed by and
construed in accordance with the laws of the State of California, without giving
effect to its principles regarding conflicts of law.

                                           "COMPANY"
                                           Superconductor Technologies Inc.

                                           By:__________________________________

                                           Name: _______________________________
                                                  (Print)
                                           Title: Chairman of the Board,
                                                  President or Vice President

                                           By:__________________________________

                                           Name: _______________________________
                                                  (Print)
                                           Title: Chief Financial Officer,
                                                  Secretary, Assistant Treasurer
                                                  or Assistant Secretary

                                           "HOLDER"
                                           Silicon Valley Bank

                                           By:__________________________________

                                           Name: _______________________________

                                           Title: ______________________________

                                           Warrant Effective Date:______________

                                        7

<PAGE>

                                   APPENDIX 1

                               NOTICE OF EXERCISE

         1.       Holder elects to purchase ___________ shares of the
Common/Series ______ Preferred [strike one] Stock of Superconductor Technologies
Inc. pursuant to the terms of the attached Warrant, and tenders payment of the
purchase price of the shares in full.

                  [or]

         1.       Holder elects to convert the attached Warrant into Shares/cash
[strike one] in the manner specified in the Warrant. This conversion is
exercised for _____________________ of the Shares covered by the Warrant.

         [Strike paragraph that does not apply.]

         2.       Please issue a certificate or certificates representing the
shares in the name specified below:

                     _______________________________________
                              Holders Name

                     _______________________________________

                     _______________________________________
                              (Address)

         3.       By its execution below and for the benefit of the Company,
Holder hereby restates each of the representations and warranties in Article 4
of the Warrant as the date hereof.

                                                 HOLDER:

                                                 _______________________________

                                                 By:____________________________

                                                 Name:__________________________

                                                 Title:_________________________

                                                 (Date):________________________

<PAGE>

                                   APPENDIX 2

                                   ASSIGNMENT

For value received, Silicon Valley Bank hereby sells, assigns and transfers unto

                           Name:    Silicon Valley Bancshares
                           Address: 3003 Tasman Drive (HA-200)
                                    Santa Clara, CA 95054

                           Tax ID: 91-1962278

that certain Warrant to Purchase Stock issued by Superconductor Technologies
Inc. (the "Company"), on ____________________ (the "Warrant") together with all
rights, title and interest therein.

                                         SILICON VALLEY BANK

                                         By:____________________________________

                                         Name:__________________________________

                                         Title:_________________________________

Date: [insert Issue Date]_____________

By its execution below, and for the benefit of the Company, Silicon Valley
Bancshares makes each of the representations and warranties set forth in Article
4 of the Warrant as of the date hereof.

                                         SILICON VALLEY BANCSHARES

                                         By:____________________________________

                                         Name:__________________________________

                                         Title: ________________________________

                                        2

<PAGE>

                                   "EXHIBIT A"
                               SILICON VALLEY BANK
                          REGISTRATION RIGHTS AGREEMENT

         THIS REGISTRATION RIGHTS AGREEMENT is entered into as of Warrant
Effective Date, by and between Silicon Valley Bank ("Purchaser") and the Company
whose name appears on the last page of this Agreement.

                                    RECITALS

         A.       Concurrently with the execution of this Agreement, the
Purchaser is purchasing from the Company a Warrant to Purchase Stock (the
"Warrant") pursuant to which Purchaser has the right to acquire from the Company
the Shares (as defined in the Warrant).

         B.       By this Agreement, the Purchaser and the Company desire to set
forth the registration rights of the Shares all as provided herein.

         C.       Capitalized terms used herein shall have the same meaning as
set forth in the Warrant.

                  NOW, THEREFORE, in consideration of the mutual promises,
covenants and conditions hereinafter set forth, the parties hereto mutually
agree as follows:

         1.       Registration Rights. The Company covenants and agrees as
follows:

                  1.1      Definitions. For purposes of this Section 1:

                           (a)      The term "register," "registered," and
"registration" refer to a registration effected by preparing and filing a
registration statement or similar document in compliance with the Securities Act
of 1933, as amended (the "Securities Act"), and the declaration or ordering of
effectiveness of such registration statement or document;

                           (b)      The term "Registrable Securities" means (i)
the Shares (if Common Stock) or all shares of Common Stock of the Company
issuable or issued upon conversion of the Shares and (ii) any Common Stock of
the Company issued as (or issuable upon the conversion or exercise of any
warrant, right or other security which is issued as) a dividend or other
distribution with respect to, or in exchange for or in replacement of, any stock
referred to in (i).

                           (c)      The terms "Holder" or "Holders" means the
Purchaser or qualifying transferees under subsection 1.8 hereof who hold
Registrable Securities.

                           (d)      The term "SEC" means the Securities and
Exchange Commission.

                  1.2      Company Registration.

                           (a)      Registration. If at any time or from time to
time, the Company shall determine to register any of its securities, for its own
account or the account of any of its shareholders, other than a registration on
Form S-1 or S-8 relating solely to employee stock option or purchase plans, or a
registration on Form S-4 relating solely to an SEC Rule 145 transaction, or a
registration on any other form (other than Form S-1, S-2, S-3 or S-18, or their
successor forms) or any successor to such forms, which does not include
substantially the same information as would be required to be included in a
registration statement covering the sale of Registrable Securities, the Company
will:

                                    (i)      promptly give to each Holder
written notice thereof (which shall include a list of the jurisdictions in which
the Company intends to attempt to qualify such securities under the applicable
blue sky or other state securities laws); and

                                        3

<PAGE>

                                    (ii)     include in such registration (and
compliance), and in any underwriting involved therein, all the Registrable
Securities specified in a written request or requests, made within 30 days after
receipt of such written notice from the Company, by any Holder or Holders,
except as set forth in subsection 1.2(b) below.

                           (b)      Underwriting. If the registration of which
the Company gives notice is for a registered public offering involving an
underwriting, the Company shall so advise the Holders as a part of the written
notice given pursuant to subsection 1.2 (a) (i). In such event the right of any
Holder to registration pursuant to this subsection 1.2 shall be conditioned upon
such Holder's participation in such underwriting and the inclusion of such
Holder's Registrable Securities in the underwriting to the extent provided
herein. All Holders proposing to distribute their securities through such
underwriting shall (together with the Company and the other shareholders
distributing their securities through such underwriting) enter into an
underwriting agreement in customary form with the underwriter or underwriters
selected for such underwriting by the Company.

                  1.3      Expenses of Registration. All expenses incurred in
connection with any registration, qualification or compliance pursuant to this
Section 1 including without limitation, all registration, filing and
qualification fees, printing expenses, fees and disbursements of counsel for the
Company and expenses of any special audits incidental to or required by such
registration, shall be borne by the Company except the Company shall not be
required to pay underwriters' fees, discounts or commissions relating to
Registrable Securities. All expenses of any registered offering not otherwise
borne by the Company shall be borne pro rata among the Holders participating in
the offering and the Company.

                  1.4      Registration Procedures. In the case of each
registration, qualification or compliance effected by the Company pursuant to
this Registration Rights Agreement, the Company will keep each Holder
participating therein advised in writing as to the initiation of each
registration, qualification and compliance and as to the completion thereof.
Except as otherwise provided in subsection 1.3, at its expense the Company will:

                           (a)      Prepare and file with the SEC a registration
statement with respect to such Registrable Securities and use its best efforts
to cause such registration statement to become effective, and, upon the request
of the Holders of a majority of the Registrable Securities registered
thereunder, keep such registration statement effective for up to 120 days.

                           (b)      Prepare and file with the SEC such
amendments and supplements to such registration statement and the prospectus
used in connection with such registration statement as may be necessary to
comply with the provisions of the Securities Act with respect to the disposition
of all securities covered by such registration statement.

                           (c)      Furnish to the Holders such numbers of
copies of a prospectus, including a preliminary prospectus, in conformity with
the requirements of the Securities Act, and such other documents as they may
reasonably request in order to facilitate the disposition of Registrable
Securities owned by them.

                           (d)      Use its best efforts to register and qualify
the securities covered by such registration statement under such other
securities or Blue Sky laws of such jurisdictions as shall be reasonably
requested by the Holders, provided that the Company shall not be required in
connection therewith or as a condition thereto to qualify to do business or to
file a general consent to service of process in any such states or
jurisdictions.

                           (e)      In the event of any underwritten public
offering, enter into and perform its obligations under an underwriting
agreement, in usual and customary form, with the managing underwriter of such
offering. Each Holder participating in such underwriting shall also enter into
and perform its obligations under such an agreement.

                           (f)      Notify each Holder of Registrable Securities
covered by such registration statement at any time when a prospectus relating
thereto is required to be delivered under the Securities

                                        4

<PAGE>

Act or the happening of any event as a result of which the prospectus included
in such registration statement, as then in effect, includes an untrue statement
of a material fact or omits to state a material fact required to be stated
therein or necessary to make the statements therein not misleading in the light
of the circumstances then existing.

                  1.5      Indemnification.

                           (a)      The Company will indemnify each Holder of
Registrable Securities and each of its officers, directors and partners, and
each person controlling such Holder, with respect to which such registration,
qualification or compliance has been effected pursuant to this Rights Agreement,
and each underwriter, if any, and each person who controls any underwriter of
the Registrable Securities held by or issuable to such Holder, against all
claims, losses, expenses, damages and liabilities (or actions in respect
thereto) arising out of or based on any untrue statement (or alleged untrue
statement) of a material fact contained in any prospectus, offering circular or
other document (including any related registration statement, notification or
the like) incident to any such registration, qualification or compliance, or
based on any omission (or alleged omission) to state therein a material fact
required to be stated therein or necessary to make the statement therein not
misleading, or any violation or alleged violation by the Company of the
Securities Act, the Securities Exchange Act of 1934, as amended, ("Exchange
Act") or any state securities law applicable to the Company or any rule or
regulation promulgated under the Securities Act, the Exchange Act or any such
state law and relating to action or inaction required of the Company in
connection with any such registration, qualification of compliance, and will
reimburse each such Holder, each of its officers, directors and partners, and
each person controlling such Holder, each such underwriter and each person who
controls any such underwriter, within a reasonable amount of time after incurred
for any reasonable legal and any other expenses incurred in connection with
investigating, defending or settling any such claim, loss, damage, liability or
action; provided, however, that the indemnity agreement contained in this
subsection 1.5 (a) shall not apply to amounts paid in settlement of any such
claim, loss, damage, liability, or action if such settlement is effected without
the consent of the Company (which consent shall not be unreasonably withheld);
and provided further, that the Company will not be liable in any such case to
the extent that any such claim, loss, damage or liability arises out of or is
based on any untrue statement or omission based upon written information
furnished to the Company by an instrument duly executed by such Holder or
underwriter specifically for use therein.

                           (b)      Each Holder will, if Registrable Securities
held by or issuable to such Holder are included in the securities as to which
such registration, qualification or compliance is being effected, indemnify the
Company, each of its directors and officers, each underwriter, if any, of the
Company's securities covered by such a registration statement, each person who
controls the Company within the meaning of the Securities Act, and each other
such Holder, each of its officers, directors and partners and each person
controlling such Holder, against all claims, losses, expenses, damages and
liabilities (or actions in respect thereof) arising out of or based on any
untrue statement (or alleged untrue statement) of a material fact contained in
any such registration statement, prospectus, offering circular or other
document, or any omission (or alleged omission) to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading, and will reimburse the Company, such Holders, such directors,
officers, partners, persons or underwriters for any reasonable legal or any
other expenses incurred in connection with investigating, defending or settling
any such claim, loss, damage, liability or action, in each case to the extent,
but only to the extent, that such untrue statement (or alleged untrue statement)
or omission (or alleged omission) is made in such registration statement,
prospectus, offering circular or other document in reliance upon and in
conformity with written information furnished to the Company by an instrument
duly executed by such Holder specifically for use therein; provided, however,
that the indemnity agreement contained in this subsection 1.5(b) shall not apply
to amounts paid in settlement of any such claim, loss, damage, liability or
action if such settlement is effected without the consent of the Holder, (which
consent shall not be unreasonably withheld); and provided further, that the
total amount for which any Holder shall be liable under this subsection 1.5(b)
shall not in any event exceed the aggregate proceeds received by such Holder
from the sale of Registrable Securities held by such Holder in such
registration.

                           (c)      Each party entitled to indemnification under
this subsection 1.5 (the "Indemnified Party") shall give notice to the party
required to provide indemnification (the "Indemnifying

                                        5

<PAGE>

Party") promptly after such Indemnified Party has actual knowledge of any claim
as to which indemnity may be sought, and shall permit the Indemnifying Party to
assume the defense of any such claim or any litigation resulting therefrom;
provided that counsel for the Indemnifying Party, who shall conduct the defense
of such claim or litigation, shall be approved by the Indemnified Party (whose
approval shall not be unreasonably withheld), and the Indemnified Party may
participate in such defense at such party's expense; and provided further, that
the failure of any Indemnified Party to give notice as provided herein shall not
relieve the Indemnifying Party of its obligations hereunder, unless such failure
resulted in prejudice to the Indemnifying Party; and provided further, that an
Indemnified Party (together with all other Indemnified Parties which may be
represented without conflict by one counsel) shall have the right to retain one
separate counsel, with the fees and expenses to be paid by the Indemnifying
Party, if representation of such Indemnified Party by the counsel retained by
the Indemnifying Party would be inappropriate due to actual or potential
differing interests between such Indemnified Party and any other party
represented by such counsel in such proceeding. No Indemnifying Party, in the
defense of any such claim or litigation, shall, except with the consent of each
Indemnified Party, consent to entry of any judgment or enter into any settlement
which does not include as an unconditional term thereof the giving by the
claimant or plaintiff to such Indemnified Party of a release from all liability
in respect to such claim or litigation.

                  1.6      Information by Holder. Any Holder or Holders of
Registrable Securities included in any registration shall promptly furnish to
the Company such information regarding such Holder or Holders and the
distribution proposed by such Holder or Holders as the Company may request in
writing and as shall be required in connection with any registration,
qualification or compliance referred to herein.

                  1.7      Rule 144 Reporting. With a view to making available
to Holders the benefits of certain rules and regulations of the SEC which may
permit the sale of the Registrable Securities to the public without
registration, the Company agrees at all times to:

                           (a)      make and keep public information available,
as those terms are understood and defined in SEC Rule 144, after 90 days after
the effective date of the first registration filed by the Company for an
offering of its securities to the general public;

                           (b)      file with the SEC in a timely manner all
reports and other documents required of the Company under the Securities Act and
the Exchange Act (at any time after it has become subject to such reporting
requirements); and

                           (c)      so long as a Holder owns any Registrable
Securities, to furnish to such Holder forthwith upon request a written statement
by the Company as to its compliance with the reporting requirements of said Rule
144 (at any time after 90 days after the effective date of the first
registration statement filed by the Company for an offering of its securities to
the general public), and of the Securities Act and the Exchange Act (at any time
after it has become subject to such reporting requirements), a copy of the most
recent annual or quarterly report of the Company, and such other reports and
documents so filed by the Company as the Holder may reasonably request in
complying with any rule or regulation of the SEC allowing the Holder to sell any
such securities without registration.

                  1.8      Transfer of Registration Rights. Holders' rights to
cause the Company to register their securities and keep information available,
granted to them by the Company under subsections 1.2 and 1.7 may be assigned to
a transferee or assignee of a Holder's Registrable Securities not sold to the
public, provided, that the Company is given written notice by such Holder at the
time of or within a reasonable time after said transfer, stating the name and
address of said transferee or assignee and identifying the securities with
respect to which such registration rights are being assigned. The Company may
prohibit the transfer of any Holders' rights under this subsection 1.8 to any
proposed transferee or assignee who the Company reasonably believes is a
competitor of the Company.

         2.       General.

                  2.1      Waivers and Amendments. With the written consent of
the record or beneficial holders of at least a majority of the Registrable
Securities, the obligations of the Company and the rights of the Holders of the
Registrable Securities under this agreement may be waived (either generally or
in a

                                        6

<PAGE>

particular instance, either retroactively or prospectively, and either for a
specified period of time or indefinitely), and with the same consent the
Company, when authorized by resolution of its Board of Directors, may enter into
a supplementary agreement for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of this Agreement;
provided, however, that no such modification, amendment or waiver shall reduce
the aforesaid percentage of Registrable Securities without the consent of all of
the Holders of the Registrable Securities. Upon the effectuation of each such
waiver, consent, agreement of amendment or modification, the Company shall
promptly give written notice thereof to the record holders of the Registrable
Securities who have not previously consented thereto in writing. This Agreement
or any provision hereof may be changed, waived, discharged or terminated only by
a statement in writing signed by the party against which enforcement of the
change, waiver, discharge or termination is sought, except to the extent
provided in this subsection 2.1.

                  2.2      Governing Law. This Agreement shall be governed in
all respects by the laws of the State of California as such laws are applied to
agreements between California residents entered into and to be performed
entirely within California.

                  2.3      Successors and Assigns. Except as otherwise expressly
provided herein, the provisions hereof shall inure to the benefit of, and be
binding upon, the successors, assigns, heirs, executors and administrators of
the parties hereto.

                  2.4      Entire Agreement. Except as set forth below, this
Agreement and the other documents delivered pursuant hereto constitute the full
and entire understanding and agreement between the parties with regard to the
subjects hereof and thereof.

                  2.5      Notices, etc. All notices and other communications
required or permitted hereunder shall be in writing and shall be mailed by first
class mail, postage prepaid, certified or registered mail, return receipt
requested, addressed (a) if to Holder, at such Holder's address as set forth
below, or at such other address as such Holder shall have furnished to the
Company in writing, or (b) if to the Company, at the Company's address set forth
below, or at such other address as the Company shall have furnished to the
Holder in writing.

                  2.6      Severability. In case any provision of this Agreement
shall be invalid, illegal, or unenforceable, the validity, legality and
enforceability of the remaining provisions of this Agreement or any provision of
the other Agreement s shall not in any way be affected or impaired thereby.

                  2.7      Titles and Subtitles. The titles of the sections and
subsections of this Agreement are for convenience of reference only and are not
to be considered in construing this Agreement.

                  2.8      Counterparts. This Agreement may be executed in any
number of counterparts, each of which shall be an original, but all of which
together shall constitute one instrument.

                                        7

<PAGE>

PURCHASER                                       COMPANY

SILICON VALLEY BANK                             SUPERCONDUCTOR
                                                TECHNOLOGIES, INC.

By:__________________________________           By:_____________________________

Name:________________________________           Name:___________________________

Title:_______________________________           Title:__________________________

Address:                                        Address:

3003 Tasman Drive                               460 Ward Drive
Santa Clara, CA 95054                           Santa Barbara, CA 93111-2310

                                        8

<PAGE>

                                    EXHIBIT B

                               Registration Rights

         The Shares (if common stock), or the common stock issuable upon
conversion of the Shares, shall be deemed "registrable securities" or otherwise
entitled to "piggy back" registration rights in accordance with the terms of the
following agreement (the "Agreement") between the Company and its investor(s):

                  _____________________________________________________
                  [Identify Agreement by date, title and parties. If no
                  Agreement exists, indicate by "none".]

         The Company agrees that no amendments will be made to the Agreement,
which would have an adverse impact on Holder's registration rights thereunder
without the consent of Holder. By acceptance of the Warrant to which this
Exhibit B is attached, Holder shall be deemed to be a party to the Agreement,
unless Holder otherwise elects not to become or to cease being a party thereto.

         If no Agreement exists, then the Company and the Holder shall enter
into Holder's standard form of Registration Rights Agreement as in effect on the
Issue Date of the Warrant.

                                        1