Document:

<PAGE>

               PATENT, TRADEMARK AND COPYRIGHT SECURITY AGREEMENT
                                      (Sub)

         This Patent, Trademark and Copyright Security Agreement (the
"Agreement"), dated March 21, 2000 is entered into by and between U.S.
INTERACTIVE CORP. (DELAWARE), a Delaware corporation (the "Pledgor"), and PNC
BANK, NATIONAL ASSOCIATION, as Agent for the Banks referred to below (the
"Secured Party").

         WHEREAS, pursuant to that certain Credit Agreement (as amended,
restated, modified or supplemented from time to time, the "Credit Agreement") of
even date herewith by and among the Pledgor as borrower, the Banks and the
Secured Party as lenders (all as defined in the Credit Agreement), Secured Party
and the Banks have agreed to provide certain loans to the Pledgor, and the
Pledgor has agreed, among other things, to grant a security interest to the
Secured Party in certain patents, trademarks, copyrights and other property as
security for such loans and other obligations as more fully described herein.

         NOW, THEREFORE, intending to be legally bound hereby, the parties
hereto agree as follows:

         1. Except as otherwise expressly provided herein, capitalized terms
used in this Agreement shall have the respective meanings given to them in the
Credit Agreement.

         2. To secure the full payment and performance of all Obligations and
other liabilities of the Pledgor now or hereafter existing under the Credit
Agreement and the other Loan Documents, including, without limitation,
principal, interest, fees, expenses, costs and expenses of enforcement,
reasonable attorneys' fees and expenses, and obligations under indemnification
provisions in the Loan Documents (collectively, the "Secured Obligations"),
Pledgor hereby grants, and conveys a security interest to Secured Party in the
entire right, title and interest of Pledgor in and to all trade names, patent
applications, patents, trademark applications, trademarks and copyrights,
whether now owned or hereafter acquired by Pledgor, including, without
limitation, those listed on Schedule A hereto, including all proceeds thereof
(such as, by way of example, license royalties and proceeds of infringement
suits), the right to sue for past, present and future infringements, all rights
corresponding thereto throughout the world and all reissues, divisions,
continuations, renewals, extensions and continuations-in-part thereof, and the
goodwill of the business to which any of the patents, trademarks and copyrights
relate (collectively, the "Patents, Trademarks and Copyrights").

         3. Pledgor covenants and warrants that:

            (a) the Patents, Trademarks and Copyrights are subsisting and have
not been adjudged invalid or unenforceable, in whole or in part;

            (b) to the best of Pledgor's knowledge, each of the Patents,
Trademarks and Copyrights is valid and enforceable;

            (c) Pledgor is the sole and exclusive owner of the entire and
unencumbered right, title and interest in and to each of the Patents, Trademarks
and Copyrights, free and clear of any liens, charges and encumbrances, including
without limitation pledges, assignments, licenses, shop rights and covenants by
Pledgor not to sue third persons;

            (d) Pledgor has the corporate power and authority to enter into this
Agreement and perform its terms;

<PAGE>

            (e) no claim has been made to Pledgor or, to the knowledge of
Pledgor, any other person that the use of any of the Patents, Trademarks and
Copyrights does or may violate the rights of any third party;

            (f) Pledgor has used, and will continue to use for the duration of
this Agreement, consistent standards of quality in its manufacture of products
sold under the Patents, Trademarks and Copyrights; and

            (g) Pledgor has used, and will continue to use for the duration of
this Agreement, proper statutory notice in connection with its use of the
Patents, Trademarks and Copyrights, except for those Patents, Trademarks and
Copyrights that are hereafter allowed to lapse in accordance with Paragraph 10
hereof.

         4. Pledgor agrees that, until all of the Secured Obligations shall have
been satisfied in full, it will not enter into any agreement (for example, a
license agreement) which is inconsistent with Pledgor's obligations under this
Agreement, without Secured Party's prior written consent which shall not be
unreasonably withheld except Pledgor may license technology in the ordinary
course of business without the Secured Party's consent to suppliers and
customers to facilitate the manufacture and use of Pledgor's products.

         5. If, before the Secured Obligations shall have been indefeasibly
satisfied in full and the Commitments have terminated, Pledgor shall own any new
trademarks or any new copyrightable or patentable inventions, or any patent
application or patent for any reissue, division, continuation, renewal,
extension, or continuation in part of any Patent, Trademark or Copyright or any
improvement on any Patent, Trademark or Copyright, the provisions of this
Agreement shall automatically apply thereto and Pledgor shall give to Secured
Party prompt notice thereof in writing. Pledgor and Secured Party agree to
modify this Agreement by amending Schedule A to include any future patents,
patent applications, trademark applications, trademarks, copyrights or copyright
applications and the provisions of this Agreement shall apply thereto.

         6. Secured Party shall have, in addition to all other rights and
remedies given it by this Agreement and those rights and remedies set forth in
the Credit Agreement, those allowed by Law and the rights and remedies of a
secured party under the Uniform Commercial Code as enacted in any jurisdiction
in which the Patents, Trademarks and Copyrights may be located and, without
limiting the generality of the foregoing, if an Event of Default has occurred
and is continuing, Secured Party may immediately, without demand of performance
and without other notice (except as set forth below) or demand whatsoever to
Pledgor, all of which are hereby expressly waived, and without advertisement,
sell at public or private sale or otherwise realize upon, in a city that the
Agent shall designate by notice to the Pledgor, in Philadelphia, Pennsylvania or
elsewhere, the whole or from time to time any part of the Patents, Trademarks
and Copyrights, or any interest which Pledgor may have therein and, after
deducting from the proceeds of sale or other disposition of the Patents,
Trademarks and Copyrights all expenses (including fees and expenses for brokers
and attorneys), shall apply the remainder of such proceeds toward the payment of
the Secured Obligations as the Secured Party, in its sole and reasonable
discretion, shall determine. Any remainder of the proceeds after payment in full
of the Secured Obligations shall be paid over to Pledgor. Notice of any sale or
other disposition of the Patents, Trademarks and Copyrights shall be given to
Pledgor at least fifteen (15) days before the time of any intended public or
private sale or other disposition of the Patents, Trademarks and Copyrights is
to be made, which Pledgor hereby agrees shall be reasonable notice of such sale
or other disposition. At any such sale or other disposition, Secured Party may,
to the extent permissible under applicable Law, purchase the whole or any part
of the Patents, Trademarks and Copyrights sold, free from any right of
redemption on the part of Pledgor, which right is hereby waived and released.

                                      -2-
<PAGE>

         7. If any Event of Default shall have occurred and be continuing,
Pledgor hereby authorizes and empowers Secured Party to make, constitute and
appoint any officer or agent of Secured Party, as Secured Party may select in
its exclusive discretion, as Pledgor's true and lawful attorney-in-fact, with
the power to endorse Pledgor's name on all applications, documents, papers and
instruments necessary for Secured Party to use the Patents, Trademarks and
Copyrights, or to grant or issue, on commercially reasonable terms, any
exclusive or nonexclusive license under the Patents, Trademarks and Copyrights
to any third person, or necessary for Secured Party to assign, pledge, convey or
otherwise transfer title in or dispose, on commercially reasonable terms, of the
Patents, Trademarks and Copyrights to any third Person. Pledgor hereby ratifies
all that such attorney shall lawfully do or cause to be done by virtue hereof.
This power of attorney, being coupled with an interest, shall be irrevocable for
the life of this Agreement.

         8. At such time as Pledgor shall have indefeasibly paid in full all of
the Secured Obligations and the Commitments shall have terminated, this
Agreement shall terminate and Secured Party shall execute and deliver to Pledgor
all deeds, assignments and other instruments as may be necessary or proper to
re-vest in Pledgor full title to the Patents, Trademarks and Copyrights, subject
to any disposition thereof which may have been made by Secured Party pursuant
hereto.

         9. Any and all reasonable fees, costs and expenses, of whatever kind or
nature, including reasonable attorneys' fees and expenses incurred by Secured
Party in connection with the preparation of this Agreement and all other
documents relating hereto and the consummation of this transaction, the filing
or recording of any documents (including all taxes in connection therewith) in
public offices, the payment or discharge of any taxes, counsel fees, maintenance
fees, encumbrances, the protection, maintenance or preservation of the Patents,
Trademarks and Copyrights, or the defense or prosecution of any actions or
proceedings arising out of or related to the Patents, Trademarks and Copyrights,
shall be borne and paid by Pledgor within fifteen (15) days of demand by Secured
Party, and if not paid within such time, shall be added to the principal amount
of the Secured Obligations and shall bear interest at the highest rate
prescribed in the Credit Agreement.

         10. Pledgor shall have the duty, through counsel reasonably acceptable
to Secured Party, to prosecute diligently any patent applications of the
Patents, Trademarks and Copyrights pending as of the date of this Agreement if
commercially reasonable or thereafter until the Secured Obligations shall have
been indefeasibly paid in full and the Commitments shall have terminated, to
make application on unpatented but patentable inventions (whenever it is
commercially reasonable in the reasonable judgment of Pledgor to do so) and to
preserve and maintain all rights in patent applications and patents of the
Patents, including without limitation the payment of all maintenance fees
(whenever it is commercially reasonable in the reasonable judgment of Pledgor to
do so). Any expenses incurred in connection with such an application shall be
borne by Pledgor. Pledgor shall not abandon any Patent, Trademark or Copyright
material to the business of Pledgor without the consent of Secured Party, which
shall not be unreasonably withheld.

         11. Pledgor shall have the right, with the consent of Secured Party,
which shall not be unreasonably withheld, to bring suit, action or other
proceeding in its own name, and to join Secured Party, if necessary, as a party
to such suit so long as Secured Party is satisfied that such joinder will not
subject it to any risk of liability, to enforce the Patents, Trademarks and
Copyrights and any licenses thereunder. Pledgor shall promptly, upon demand,
reimburse and indemnify Secured Party for all damages, costs and expenses,
including reasonable legal fees, incurred by Secured Party as a result of such
suit or joinder by Pledgor.

         12. No course of dealing between Pledgor and Secured Party, nor any
failure to exercise nor any delay in exercising, on the part of Secured Party,
any right, power or privilege hereunder or under the Credit Agreement or other
Loan Documents shall operate as a waiver of such right, power or privilege, nor
shall any single or partial exercise of any right, power or privilege hereunder
or thereunder preclude any other or further exercise thereof or the exercise of
any other right, power or privilege.

                                      -3-
<PAGE>

         13. All of Secured Party's rights and remedies with respect to the
Patents, Trademarks and Copyrights, whether established hereby or by the Credit
Agreement or by any other agreements or by Law, shall be cumulative and may be
exercised singularly or concurrently.

         14. The provisions of this Agreement are severable, and if any clause
or provision shall be held invalid and unenforceable in whole or in part in any
jurisdiction, then such invalidity or unenforceability shall affect only such
clause or provision, or part thereof, in such jurisdiction, and shall not in any
manner affect such clause or provision in any other jurisdiction, or any clause
or provision of this Agreement in any jurisdiction.

         15. This Agreement is subject to modification only by a writing signed
by the parties, except as provided in Paragraph 5.

         16. The benefits and burdens of this Agreement shall inure to the
benefit of and be binding upon the respective successors and permitted assigns
of the parties, provided, however, that Pledgor may not assign or transfer any
of its rights or obligations hereunder or any interest herein and any such
purported assignment or transfer shall be null and void.

         17. This Agreement shall be governed by and construed in accordance
with the internal Laws of the Commonwealth of Pennsylvania without regard to its
conflicts of law principles.

                      [SIGNATURES APPEAR ON FOLLOWING PAGE]

                                      -4-
<PAGE>

                   [SIGNATURE PAGE 1 OF 1 TO PATENT, TRADEMARK
                        AND COPYRIGHT SECURITY AGREEMENT]

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective officers or agents thereunto duly authorized, as of
the date first above written.

ATTEST:                               U.S. INTERACTIVE CORP. (DELAWARE)

______________________________        By:______________________________________
Name:                                 Name:
Title:                                Title:

                                      PNC BANK, NATIONAL ASSOCIATION, as Agent

                                      By:______________________________________
                                      Name:
                                      Title:

<PAGE>

                                   SCHEDULE A
                                       TO
               PATENT, TRADEMARK AND COPYRIGHT SECURITY AGREEMENT

                     LIST OF REGISTERED PATENTS, TRADEMARKS,
                           TRADE NAMES AND COPYRIGHTS

         1.       Registered Patents:

         2.       Trademarks:

         3.       Trade Names:

         4,       Copyrights:<PAGE>   1
                                                                   EXHIBIT 10.30

                              EMPLOYMENT AGREEMENT

                  THIS AGREEMENT is made and entered into as of the 10th day of
December, 1999, by and between FSI International, Inc., a Minnesota corporation
(hereinafter "FSI"), and Donald S. Mitchell who has agreed to accept employment
in Minnesota with FSI as Chief Executive Officer and President (hereinafter
"Employee").

DEFINITIONS

                  Specific terms used in this Agreement have the following
                  meanings:

                  "Base Annual Salary" shall mean the highest annual rate of the
                  Employee's base salary with the Company during the 12 (twelve)
                  months preceding the date of termination of the Employee's
                  employment with the Company and its Subsidiaries (without
                  reduction for any salary reduction or other deferral
                  contribution to any employee benefit plan sponsored by the
                  Company).

                  "Cause" shall mean and be limited to, (i) willful and gross
                  neglect of duties by the Employee or (ii) an act or acts
                  committed by the Employee constituting a felony under United
                  States federal or applicable state law and substantially
                  detrimental to the Company or any Subsidiary or the reputation
                  of the Company or any Subsidiary, so long as Employee is given
                  written notice thereof and fails to promptly cure (if such
                  "Cause" can be cured) and subsequently there is a
                  determination by a resolution duly adopted by the affirmative
                  vote of not less than two-thirds of the entire membership of
                  the Board at a meeting thereof called and held for such
                  purpose (after reasonable notice is provided to the Employee
                  and the Employee is given an opportunity to be heard before
                  the Board) finding that in the good faith opinion of the Board
                  the Employee is guilty of the conduct described above in (i)
                  or (ii).

                  "Company" means, separately and collectively, FSI and any
                  entity in which FSI has an ownership interest, directly or
                  indirectly, of at least 20% (twenty percent) of the
                  outstanding shares of such entity.

                  "Competing Product"

                           (a)      for the period you are an Employee of the
                                    Company means any product or service that
                                    competes with or will compete with any
                                    product, product line, or service that is
                                    sold, marketed, produced, distributed,
                                    leased, or under development by the Company
                                    with respect to which Employee performed
                                    services of any kind or nature during the 24
                                    (twenty-four) month period ending on the
                                    date of the conduct at issue;
                           (b)      for the period after Employee's employment
                                    with the Company, has ended, any product or
                                    service that competes with or will compete
                                    with any product, product line, or service
                                    that is sold, marketed, produced,
                                    distributed, leased, or under development by

                                       1

<PAGE>   2

                                    the Company with respect to which Employee
                                    performed services of any kind or nature
                                    during the 24 (twenty-four) month period
                                    ending on the date Employee's employment
                                    with the Company ends.

                  "Confidential Information" means certain proprietary
                  information maintained in confidence by the Company as
                  intellectual property, trade secrets, or otherwise, including
                  but not limited to information relating to (i) the Company's
                  finances, processes, products, services, research, and
                  development, and (ii) its manufacturing, purchasing,
                  accounting, engineering, designing, marketing, merchandising,
                  selling, distributing, leasing, and servicing systems and
                  techniques; it also includes plans or proposals with regard to
                  any of the foregoing, whether implemented or not. All
                  information originated by Employee, or disclosed to Employee,
                  or to which Employee otherwise gains access, during the period
                  of Employee's employment with FSI that the Employee has reason
                  to believe is Confidential Information, or that is
                  characterized or treated by the Company as being Confidential
                  Information, or that would be of economic value to a third
                  party, shall be presumed to be Confidential Information.

                  "Customer" means any firm, person, corporation, or other
                  entity
                           (i)      to whom or to which the Company has sold,
                                    distributed, or leased its products or
                                    services, or
                           (ii)     whom or which the Company has solicited for
                                    sales, distribution, or leasing of its
                                    products or services,
                  whether directly or indirectly, and whether by or through
                  employees of the Company or of affiliated sales organizations.

                  "Customer Information" means information relating to
                  Customers' operations, processes, products, and research and
                  development and to Customers' manufacturing, purchasing, and
                  engineering systems and techniques.

                  "Restricted Country" means any nation or country in which the
                  Company had Customers, had business operations, or otherwise
                  did business, directly or indirectly, in the 24 (twenty-four)
                  month period ending on the effective date of the termination
                  of Employee's employment with FSI.

                  Terms not specifically defined will be interpreted in light of
the context in which they appear.

AGREEMENT:

                  In consideration of his/her employment by FSI, and the wages,
salary, and employee benefits to be provided to Employee in compensation for
his/her services, Employee hereby agrees as follows:

                  1.       Employee acknowledges and agrees:

                           (a)      That during the course of his/her employment
with FSI, Employee may have access to Confidential Information; that the Company
has developed and established

                                       2

<PAGE>   3

and will continue to develop and establish a valuable and extensive trade in its
products and services; and that the Company would suffer great loss and
irreparable injury if Employee were to disclose any of the Confidential
Information, or use it in the solicitation of the customers of the Company or
use it to compete with the Company.

                           (b)      That during the course of his/her employment
with FSI, Employee may have access to Customer Information; that Customer
Information obtained by Employee during the course of his/her employment with
FSI is a valuable asset of FSI; and that the Company would suffer great loss and
irreparable injury if Employee were to use Customer Information in the
solicitation of Customers of the Company or to otherwise compete with the
Company.

                  2.       (a)      Employee during his/her employment with FSI
and at all times thereafter shall maintain in strictest confidence and shall
not, without FSI's express advance written consent, directly or indirectly
(whether through written or printed materials, electronic media, or oral
communications, and whether Employee's source of information is written or
printed materials, electronic media, oral communications, or his/her own
memory),

                  (i)      copy, or

                  (ii)     transmit, publish, communicate, or otherwise disclose
                           or make available, or permit or cause to be
                           transmitted, published, communicated or otherwise
                           disclosed or made available, to any other firm,
                           person, corporation or other entity, or

                  (iii)    use as owner, director, officer, manager, trustee,
                           partner, employee, independent contractor, agent, or
                           consultant in any business venture or other
                           enterprise or endeavor, any Confidential Information
                           or Customer Information.

                           (b)      An exception to the provisions of paragraph
2(a), above, is that in the scope and course of his/her employment with FSI,
Employee may, in furtherance of the Company's business interests, communicate
Confidential Information or Customer Information to other responsible Company
personnel, Customers, and other persons or entities with whom or which the
Company has dealings, who have a need to know such information.

                  3.       During Employee's employment under this Agreement and
for a period of one (1) year following termination of Employee's employment
hereunder, whether voluntary or involuntary:

                           (a)      Employee will inform any new employer, prior
to accepting employment, of the existence of this Agreement and provide such
employer with a copy of this Agreement.

                           (b)(i)   Except for ownership of 1% or less of the
shares of any company listed on a national or regional stock exchange, Employee
will not own any shares of stock or other ownership interest, either directly or
indirectly, or serve as a director, officer, manager, trustee, partner,
employee, independent contractor, agent, or consultant, or otherwise become
active or involved in the management, operation, or representation of a business
or other

                                       3

<PAGE>   4

enterprise that is engaged in or about to engage in selling, marketing,
producing, distributing, leasing, designing, or developing a Competing Product
in any Restricted Country.

                               (ii) It is provided, however, that Employee may
accept employment with a business organization that is engaged or about to
engage in selling, marketing, producing, distributing, leasing, or developing a
Competing Product in a Restricted Country if (i) such business organization is
diversified to the extent that it has significant operations other than that
portion of the business organization that is engaged or about to engage in
selling, marketing, producing, distributing, leasing, or developing a Competing
Product; (ii) during the entire one year period following termination of
employment with FSI, such Employee will be rendering services to that portion of
the business organization that is not engaged or about to engage in selling,
marketing, producing, distributing, leasing, or developing a Competing Product;
and (iii) prior to acceptance of employment by Employee with such business
organization, separate written assurances satisfactory to FSI shall be received
and accepted by FSI from both the Employee and the business organization, in
each case stating that during the entire one year period following termination
of employment with FSI Employee will not be rendering services to any portion of
the business organization that, directly or indirectly, is engaged or about to
engage in selling, marketing, producing, distributing, leasing, designing, or
developing a Competing Product.

                           (c)      Employee will not, on behalf of
himself/herself or any other person or entity, directly or indirectly sell,
distribute, or lease a Competing Product to, or solicit sales, distribution, or
leasing of a Competing Product to, any Customer with whom Employee communicated,
whether in person, through written or printed materials, or by telephone,
electronic mail, or other form of electronic transmission, during the 24
(twenty-four) month period ending on the effective date of the termination of
Employee's employment with FSI. This paragraph 3(c) shall not be interpreted to
limit or restrict in any way the commitments of Employee set forth in paragraph
3(b), above.

                           (d)      Employee will not, directly or indirectly,
persuade, encourage, or entice, or attempt to persuade, encourage or entice:
employees of the Company to terminate their employment relationship with the
Company; manufacturers or suppliers to adversely alter, or modify, or to
discontinue, their relationship with the Company unless at the written request
of FSI's President or Vice President of Human Resources; or Customers to
discontinue purchasing from the Company.

                  4.       If Employee is terminated by Company other than for
Cause, then Company shall pay Employee his Base Annual Salary for 1 (one) year,
such payments to be made during the Company's normal payroll periods at
Employee's last known address; provided, however, that the Company is not
obligated to pay such benefits if a majority of the Board of Directors
determines after giving Employee notice and an opportunity to be heard that he
has breached (and failed to cure, if such breach can be cured) any of Sections
2, 3, or 5 of the Agreement. Further, Employee shall not be entitled to such
severance payments in the event he voluntarily resigns. Such payments shall be
in lieu of any payments under the Company's Severance Plan and are conditioned
upon Employee's execution of a release in the form attached hereto and the
expiration (without rescission) of the applicable rescission period.

                  5. Upon termination of his/her employment with FSI, Employee
agrees to deliver promptly to FSI all records, manuals, books, blank forms,
documents, letters, memoranda, notes, notebooks, reports, data, tables,
photographs, videotapes, audio tapes,

                                       4

<PAGE>   5

computer disks or other form of computer storage, and calculations or copies
thereof, whether in written or printed materials or electronic media of any kind
or nature, which are the property of the Company or which relate in any way to
the business, products, practices, or techniques of the Company and all other
property, Confidential Information, and Customer Information including, but not
limited to, all documents and electronic media which in whole or in part contain
any Confidential Information or Customer Information, whether or not
constituting intellectual property or trade secrets, which in any of these cases
are in his/her possession or under his/her control. Employee shall be permitted
to retain personal correspondence, documents and items which contain no
Confidential Information or Customer Information; prior to removing any such
personal materials, Employee will review them with a representative designated
by FSI.

                  6.       Employee's employment is at-will. Neither this
Agreement, in whole or in part, nor any action taken hereunder shall be
construed as giving Employee any right to be retained in the employ of FSI for
any particular period of time nor shall it otherwise limit FSI's right to
terminate the employment of Employee at any time, with or without cause or
reason, or the Employee's right to resign.

                  7.       Employee specifically acknowledges and agrees that
the terms and conditions of the above restrictive covenants are reasonable and
necessary for the protection of FSI's business, Confidential Information, and
Customer Information, whether or not characterized as intellectual property or
trade secrets, and to prevent damage or loss to FSI as a result of any action
taken by Employee.

                  8.       Employee hereby acknowledges and agrees that any
breach by Employee of the foregoing provisions may cause FSI irreparable injury
for which there is no adequate remedy at law. Therefore, Employee expressly
agrees that FSI shall be entitled, in addition to any other remedies available,
to injunctive and/or other equitable relief to require specific performance or
prevent a breach under the provisions of this Agreement. Employee further agrees
that any delay by FSI in asserting a right under this Agreement, or any failure
by FSI to assert a right under this Agreement, does not constitute a waiver by
FSI of any right hereunder, and FSI may subsequently assert any or all of its
rights hereunder as if the delay or failure to assert rights had not occurred.

                  9.       In the event that any portion of this Agreement may
be held to be invalid or unenforceable for any reason, it is hereby agreed that
said invalidity or unenforceability shall not affect the other portions of this
Agreement and that the remaining terms and conditions or portions hereof shall
remain in full force and effect and any court of competent jurisdiction may so
modify the objectionable provision as to make it valid, reasonable, and
enforceable.

                  10.      This Agreement shall be binding upon and shall be
enforceable by the parties hereto and their respective successors and assignees.

                  11.      This Agreement shall be governed by the laws of the
State of Minnesota.

                  12.      This Agreement supersedes any previous agreement,
written or oral, between FSI and Employee relating to the same subject matter.
This Agreement may be amended or terminated only by a subsequent agreement in
writing signed by Employee and an officer of FSI.

                                       5

<PAGE>   6

                  IN WITNESS WHEREOF, the parties hereto have executed this
Agreement the day and year first-above written.

FSI INTERNATIONAL, INC.                    EMPLOYEE

By:  /s/J.A. Elftmann                      /s/D.S. Mitchell
     --------------------------            --------------------------
      Joel A. Elftmann                     Donald S. Mitchell

Its:  Chairman

                                       6

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