Document:

<PAGE>

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                   EXHIBIT 10.44

                     PATENT ASSIGNMENT AND CROSS-LICENSE AND
                           TRADEMARK LICENSE AGREEMENT

         This Patent Assignment and Cross-License and Trademark License
Agreement ("Agreement") is entered into as of February 11, 2003 ("Effective
Date") by and between the Parties,

                  Entegris, Inc., a Minnesota corporation having corporate
         offices at 3500 Lyman Boulevard, Chaska, Minnesota 55318 ("Entegris"),
         and

                  Entegris Cayman Ltd., a Cayman Island corporation and
         wholly-owned subsidiary of Entegris, Inc. ("Entegris Cayman"), and

                  Asyst Technologies, Inc., a California corporation having a
         principal place of business at 48761 Kato Road, Fremont, California
         94538 ("Asyst").

         WHEREAS, Asyst is the owner of patents relating to wafer and/or reticle
containers, including SMIF Pods and Front Opening Unified Pods ("FOUPs"), load
ports for interfacing with wafer and/or reticle containers ("Ports"), material
handling systems for transporting, storing, delivering and loading SMIF Pods,
FOUPs and individual wafers, and systems used to track, identify, manage,
control and route lots, carriers, wafers and/or reticles during the manufacture
of semiconductor devices ("Tracking Systems").

         WHEREAS, Entegris and Entegris Cayman are the owners of patents
relating to wafer and/or reticle carriers and containers, Ports, and/or Tracking
Systems.

         WHEREAS, Entegris, Entegris Cayman, and Asyst are parties to that
certain Asset Purchase Agreement, dated as of February 11, 2003 (the "Asset
Purchase Agreement") under which the Parties have agreed to transfer and to
license certain patents relating to wafer and/or reticle containers, Ports,
material handling systems and/or Tracking Systems.

         In consideration of the above, Entegris, Entegris Cayman, and Asyst
agree as follows:

                                 A R T I C L E 1

                                   DEFINITIONS

         1.1      "POD AND CARRIER PATENTS" means United States and foreign
patents issued on or before the [*] anniversary of the Effective Date having
claims directed to sealable, transportable containers, wafer and/or reticle
carriers and containers, or components of wafer and/or reticle carriers and
containers, including, but not limited to, the patents identified in Exhibit I
to this Agreement. By way of example, components of wafer and/or reticle
carriers and containers may include, without limitation, purging components,
valves, manifolds, filters, cartridges, sensors embedded in or residing in the
interior of wafer and/or reticle carriers and containers, and

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      page - 1 -

<PAGE>

vapor drains. Pod and Carrier Patents do not include Combined Pod and Port
Patents, Environmental Control Patents, MHS Patents, or AutoID/Lot Tracking
Patents as defined below.

         1.2      "COMBINED POD AND PORT PATENTS" means United States and
foreign patents issued on or before the [*] anniversary of the Effective Date
having claims directed to (a) the combined structure of a wafer or reticle
container and a Port or (b) the operation of a wafer or reticle container and a
Port, including, but not limited to, the patents identified in Exhibit II to
this Agreement.

         1.3      "PORT PATENTS" means United States and foreign patents issued
on or before the [*] anniversary of the Effective Date having claims directed to
the structure and/or operation of a Port.

         1.4      "MHS PATENTS" means United States and foreign patents issued
on or before the [*] anniversary of the Effective Date having claims directed to
the structure and/or operation of a material handling system for transporting,
storing, delivering and/or loading wafer and/or reticle containers or individual
wafers in the manufacture of semiconductor devices, or components of such a
system.

         1.5      "ENVIRONMENTAL CONTROL PATENTS" means United States and
foreign patents issued on or before the [*] anniversary of the Effective Date
having claims directed to environmental control features of Ports for
controlling the environment inside of wafer and/or reticle containers, including
purging systems, including, but not limited to, the patents identified in
Exhibit III to this Agreement; provided, however, that Environmental Control
Patents do not include patents with claims principally directed to environmental
control features within wafer and/or reticle containers.

         1.6      "AUTOID/LOT TRACKING PATENTS" means United States and foreign
patents issued on or before the [*] anniversary of the Effective Date having
claims principally directed to systems or components of systems used to track,
identify, manage, control and route lots, carriers, wafers and/or reticles
during the manufacture of semiconductors or semiconductor wafers, including, but
not limited to, the patents identified in Exhibit IV to this Agreement.

         1.7      "LICENSED PATENTS" means Pod and Carrier Patents, Port
Patents, Combined Pod and Port Patents, MHS Patents, Environmental Control
Patents, and AutoID/Lot Tracking Patents.

         1.8      "EXCLUSIVE RIGHTS PATENTS" means the Patents and Applications
identified in Schedules 1b and 1c of Exhibit I to this Agreement and all foreign
equivalents and counterparts, divisions, continuations, continuations-in-part,
reexaminations, and reissues of such Patents and Applications.

         1.9      "ACQUIRED PRODUCTS" means sealable transportable containers
made primarily of plastic, wafer and/or reticle carriers and

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      page - 2 -

<PAGE>

containers specifically adapted for use in the manufacture, storage, transport
of semiconductor wafers and plastic flat panel carriers and containers
specifically adapted for use in the manufacture, storage, and transport of flat
panel displays.

         1.10     "RETICLE POD" means containers for holding reticles comprising
a base, a machine operable latch mechanism, a top cover, and a seal . Reticle
Pod does not include containers used solely for shipment of reticles between
facilities.

         1.11     "NON-PLASTIC FLAT PANEL DISPLAY PRODUCTS" means non-plastic
carriers and containers specifically adapted for use in the manufacture, storage
and transport of flat panel displays.

         1.12     "LICENSED TRADEMARKS" means the marks ASYST(R), A S Y S T(R),
and A(R).

         1.13     "SUBSIDIARIES" means any corporation, company or other legal
entity, in which more than fifty percent (50%) of the shares entitled to vote
for the election of directors or persons performing similar functions are, now
or hereafter, owned or controlled, directly or indirectly by a Party hereto, or
jointly by the Parties hereto; provided, however, that any corporation, company
or other legal entity shall be a Subsidiary only for as long as such ownership
or control exists.

         1.14     "THIRD PARTY" means any person or entity other than Asyst,
Entegris, Entegris Cayman, Asyst's Subsidiaries, and Entegris' Subsidiaries.

         Unless otherwise defined herein all capitalized terms shall have the
same meaning and effect as set forth in the Asset Purchase Agreement.

                                A R T I C L E 2

                      PATENT ASSIGNMENT AND LICENSE GRANTS

         2.1      Asyst hereby sells, assigns, transfers and otherwise conveys
to Entegris Cayman the entire right, title and interest in and to the specific
Patents and Applications identified in Exhibit I and any foreign counterparts,
and all other patents or applications that now or in the future claim priority
to any Patent or Application identified in Exhibit I.

                  2.1.1    Asyst shall execute assignments in the form of
         Exhibit V to this Agreement and Asyst shall execute any and all other
         documents necessary and sufficient to permit Entegris Cayman to effect
         the transfer of all right, title and interest in the Patents of Exhibit
         I to Entegris Cayman and to record the assignment of the Patents or
         Applications identified in Exhibit I to Entegris Cayman in the United
         States Patent and Trademark Office and in the Patent Offices of other
         relevant jurisdictions.

                  2.1.2    Notwithstanding the provisions of Articles 2.1 and
         2.1.1, Asyst shall sell, assign, transfer and otherwise convey only
         Asyst's undivided fifty percent ownership of the right, title and
         interest in Application USSN 10/161,436 identified in Schedule 1c of
         Exhibit I.

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 3 -

<PAGE>

         2.2      Entegris and Entegris Cayman grant to Asyst and Asyst's
Subsidiaries a [*] (except as provided in Article 7.2) license, including the
right to grant sublicenses, under all Exclusive Rights Patents owned or
licensable by Entegris Cayman or Entegris to make, have made, use, sell, offer
to sell, import, export, and otherwise dispose of, [*], all products except
Acquired Products.

                  2.2.1    Asyst, [*] for all products except Acquired Products,
         shall have the power to institute and prosecute, at Asyst's own
         expense, suits for infringement of the Exclusive Rights Patents by any
         products except Acquired Products, and, if required by law, Entegris
         Cayman and/or Entegris will join as party plaintiff in such suits.

                  2.2.2    All expenses in such suits, including Entegris
         Cayman's and Entegris' attorneys' fees, will be paid entirely by Asyst.

                  2.2.3    Asyst shall have the [*] right to collect all
         damages, profits and awards of any nature resulting from such suits.

                  2.2.4    Asyst is empowered to settle any claim or suit for
         infringement of the Exclusive Rights Patents by any products except
         Acquired Products by granting the infringing party a sublicense.

                  2.2.5    Asyst, Entegris Cayman and Entegris shall reasonably
         assist and cooperate with one another with regard to litigation
         procedures such as producing documents, making inventors available for
         deposition, and providing information at the other's reasonable
         request.

         2.3      Asyst grants to Entegris Cayman a [*] (except as provided in
Article 7.2) license, including the right to grant sublicenses, under all
Combined Pod and Port Patents owned or licensable by Asyst to make, have made,
use, sell, offer to sell, import, export, and otherwise dispose of, [*],
Acquired Products.

                  2.3.1    Entegris Cayman, [*] for Acquired Products, shall
         have the power to institute and prosecute, at Entegris Cayman's own
         expense, suits for infringement of the Combined Pod and Port Patents by
         Acquired Products, and, if required by law, Asyst will join as party
         plaintiff in such suits.

                  2.3.2    All expenses in such suits, including Asyst's
         attorneys' fees, will be paid entirely by Entegris Cayman.

                  2.3.3    Entegris Cayman shall have the [*] right to collect
         all damages, profits and awards of any nature resulting from such
         suits.

                  2.3.4    Entegris Cayman is empowered to settle any claim or
         suit for infringement of the Combined Pod and Port Patents by Acquired
         Products by granting the infringing party a sublicense.

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 4 -

<PAGE>

                  2.3.5    Asyst, Entegris Cayman, and Entegris shall reasonably
         assist and cooperate with one another with regard to litigation
         procedures such as producing documents, making inventors available for
         deposition, and providing information at the other's reasonable
         request.

         2.4      Entegris Cayman and Entegris grant to Asyst and Asyst's
Subsidiaries a [*] (except as provided in Article 7.2) license under Pod and
Carrier Patents owned or licensable by Entegris Cayman or Entegris to (a)
conduct development, research, testing, or demonstration of Acquired Products,
provided that Asyst does not transfer Acquired Products to third parties for
purposes other than development, research, testing, or demonstration, and (b) to
make, have made, use, sell, offer to sell, import, export, and otherwise dispose
of, [*], Non-Plastic Flat Panel Display Products.

         2.5      Entegris Cayman and Entegris grant to Asyst and Asyst's
Subsidiaries a [*] (except as provided in Article 7.2) license under all Port
Patents, MHS Patents, Environmental Control Patents, and AutoID/Lot Tracking
Patents owned or licensable by Entegris Cayman or Entegris to make, have made,
use, sell, offer to sell, import, export, and otherwise dispose of, [*], all
products except Acquired Products.

         2.6      Asyst grants to Entegris Cayman a [*] (except as provided in
Article 7.2) license under Pod and Carrier Patents, MHS Patents, Environmental
Control Patents, and AutoID/Lot Tracking Patents owned or licensable by Asyst to
make, have made, use, sell, offer to sell, import, export, and otherwise dispose
of, [*], Acquired Products.

         2.7      The licenses granted in this Article 2 shall extend for the
life of the Licensed Patents and the Exclusive Rights Patents.

         2.8      The rights and licenses granted under Articles 2.4, 2.5, and
2.6 of this Agreement exclude the right to grant sublicenses.

         2.9      No right or license is granted by Asyst to Entegris Cayman or
Entegris or by Entegris Cayman or Entegris to Asyst under this Agreement, by
implication or by estoppel, or otherwise to any patents, inventions, patent
application, know-how, technology, trademark, copyright, trade secret, or other
property right, other than the rights and licenses expressly granted in Article
2 of this Agreement.

                                A R T I C L E 3

                                   WARRANTIES

         3.1      Asyst represents and warrants that Asyst has the full right,
power, and authority to enter into and perform its obligations under this
Agreement and grant to Entegris Cayman and Entegris the licenses and other
rights as set forth herein, and there are no outstanding agreements, grants,
licenses, encumbrances, liens, or agreements, either written or implied,
inconsistent therewith or pursuant to which this Agreement or the parties'
performance hereunder would violate, breach, or cause a default.

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 5 -

<PAGE>

         3.2      The execution, delivery, and performance of this Agreement
have been duly authorized by all necessary corporate actions on the part of
Asyst.

         3.3      Entegris Cayman represents and warrants that Entegris Cayman
has the full right, power, and authority to enter into and perform Entegris
Cayman's obligations under this Agreement, and there are no outstanding
agreements, grants, licenses, encumbrances, liens, or agreements, either written
or implied, inconsistent therewith or pursuant to which this Agreement or the
parties' performance hereunder would violate, breach, or cause a default.

         3.4      The execution, delivery, and performance of this Agreement
have been duly authorized by all necessary corporate actions on the part of
Entegris Cayman.

         3.5      Entegris represents and warrants that Entegris has the full
right, power, and authority to enter into and perform Entegris's obligations
under this Agreement, and there are no outstanding agreements, grants, licenses,
encumbrances, liens, or agreements, either written or implied, inconsistent
therewith or pursuant to which this Agreement or the parties' performance
hereunder would violate, breach, or cause a default.

         3.6      The execution, delivery, and performance of this Agreement
have been duly authorized by all necessary corporate actions on the part of
Entegris.

         3.7      DISCLAIMER OF WARRANTIES. Except as expressly set forth
herein, EACH PARTY EXPRESSLY DISCLAIMS, TO THE EXTENT ALLOWED BY APPLICABLE LAW,
ANY AND ALL WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT
LIMITATION THE WARRANTIES OF DESIGN, MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE (EVEN IF INFORMED OF SUCH PURPOSE), NONINFRINGEMENT OF THE INTELLECTUAL
PROPERTY RIGHTS OF THIRD PARTIES, OR ARISING FROM A COURSE OF DEALING, USAGE OR
TRADE PRACTICES, IN ALL CASES WITH RESPECT THERETO.

         3.8      Nothing in this Agreement shall be construed as:

                  3.8.1    a representation or warranty by Asyst or Entegris
         Cayman or Entegris of the validity, enforceability or scope of any of
         the Licensed Patents; or

                  3.8.2    a requirement that Asyst or Entegris Cayman or
         Entegris shall file any patent application or secure any patent, except
         that Asyst will maintain all applications being transferred to Entegris
         Cayman until said files are physically transferred; or

                  3.8.3    a representation or warranty that any product made,
         used, sold, or otherwise disposed of by Asyst or Entegris Cayman or
         Entegris is free from infringement of patents of Third Parties.

         3.9      Asyst agrees that if Asyst intends not to maintain any
Licensed Patents owned by Asyst, Asyst will provide Entegris Cayman reasonable
notice of at least 45 days of said intention not to pay said maintenance fees or
annuities and Asyst will [*].

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 6 -

<PAGE>

         3.10     Asyst will not in the future disparage the patents of Exhibit
I.

         3.11     Entegris Cayman agrees that if Entegris Cayman intends not to
maintain any Combined Pod and Port Patents, Port Patents, Environmental Control
Patents, or Auto ID/Lot Tracking Patents owned by Entegris Cayman, Entegris
Cayman will provide Asyst reasonable notice of at least 45 days of said
intention not to pay said maintenance fees or annuities and Entegris Cayman [*].

         3.12     Entegris agrees that if Entegris intends not to maintain any
Combined Pod and Port Patents, Port Patents, Environmental Control Patents, or
Auto ID/Lot Tracking Patents owned by Entegris, Entegris will provide Asyst
reasonable notice of at least 45 days of said intention not to pay said
maintenance fees or annuities and Entegris will [*].

         3.13     Asyst warrants that Asyst has disclosed to Entegris all other
licenses and all pending litigation involving Pod and Carrier Patents, Combined
Pod and Port Patents, Environmental Control Patents, and Auto ID/Lot Tracking
Patents owned by Asyst.

         3.14     Entegris warrants that Entegris has disclosed to Asyst all
other licenses and all pending litigation involving Pod and Carrier Patents,
Combined Pod and Port Patents, Environmental Control Patents, and Auto ID/Lot
Tracking Patents owned by Entegris.

                                A R T I C L E 4

                                    ROYALTIES

         4.1      See Exhibit VI.

         4.2      Entegris hereby guarantees the payment of the royalties due by
Entegris Cayman under this agreement.

                                A R T I C L E 5

                           TRADEMARK LICENSE AGREEMENT

         5.1      Asyst grants Entegris Cayman a [*] (except as provided in
Article 7.2) license under the Licensed Trademarks to use the Licensed
Trademarks in conjunction with marketing and selling Acquired Products.

                  5.1.1    Use of the Licensed Trademarks by Entegris Cayman
         shall inure to the benefit of Asyst.

                  5.1.2    Entegris Cayman shall use the Licensed Trademarks in
         a form which is in accordance with sound trademark practice so as not
         to weaken the value of the Licensed Trademarks.

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 7 -

<PAGE>

                  5.1.3    Entegris Cayman shall not engage in any act or
         omission which may diminish or impair the goodwill or reputation
         associated with the Licensed Trademarks.

         5.2      TRADEMARK QUALITY CONTROL.

                  5.2.1    In order to promote the goodwill symbolized by each
         of the Licensed Trademarks, Entegris Cayman will insure that the goods
         with which the Licensed Trademarks are associated are continuously of
         the same high quality as the goods marketed under the Licensed
         Trademarks by Asyst.

                  5.2.2    All uses of the Licensed Trademarks on Acquired
         Products and packaging for Acquired Products shall be approved by Asyst
         prior to use; provided, however, that such approval shall not be
         unreasonably withheld.

                  5.2.3    Upon reasonable notice from Asyst that the standards
         specified in Article 5.1 are not satisfied or discovery by Entegris
         Cayman or Entegris that the standards specified in Article 5.1 are not
         satisfied, Asyst shall have the right to inspect the Acquired Products
         manufactured by Entegris Cayman or Entegris, and the methods of
         manufacture of the Acquired Products on the premises of Entegris Cayman
         or Entegris, on the premises of third-party manufacturers, and
         elsewhere, as part of appropriate quality control.

                  5.2.4    Entegris Cayman shall, when requested by Asyst, make
         available to Asyst, at a time and place mutually agreed upon by
         Entegris Cayman and Asyst, a sample of each Acquired Product marketed
         by Entegris Cayman in association with the Licensed Trademarks at the
         time of such a request for the purpose of inspecting the Acquired
         Products.

                  5.2.5    Upon notice from Asyst or discovery by Entegris
         Cayman that the standards specified in Article 5.1 are not satisfied,
         Entegris Cayman shall, at Entegris Caymans' expense, promptly take any
         corrective action or destroy any Acquired Product or the packaging for
         any Acquired Product that does not satisfy the standards of Article
         5.1.

                  5.2.6    In order to promote the goodwill symbolized by each
         of the Licensed Trademarks, Entegris will insure that the goods with
         which the Licensed Trademarks are associated are continuously of the
         same high quality as the goods marketed under the Licensed Trademarks
         by Asyst.

                  5.2.7    Entegris shall, when requested by Asyst, make
         available to Asyst, at a time and place mutually agreed upon by
         Entegris and Asyst, a sample of each Acquired Product marketed by
         Entegris in association with the Licensed Trademarks at the time of
         such a request for the purpose of inspecting the Acquired Products.

                  5.2.8    Upon notice from Asyst or discovery by Entegris that
         the standards specified in Article 5.1 are not satisfied, Entegris
         shall, at Entegris' expense, promptly

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 8 -

<PAGE>

         take any corrective action or destroy any Acquired Product or the
         packaging for any Acquired Product that does not satisfy the standards
         of Article 5.1.

                                A R T I C L E 6

                                ENTIRE AGREEMENT

         6.1      This Agreement along with the Exhibits to this Agreement and
the Asset Purchase Agreement constitute the entire agreement and understanding
of Asyst, Entegris Cayman, and Entegris and supersedes all prior understandings
and representations (oral or written) between the parties with respect to the
subject matter hereof. Neither this Agreement nor any subsequent agreement
amending, supplementing, or terminating this Agreement shall be binding on the
parties unless and until it has been signed by duly authorized representatives
of the Parties.

                                A R T I C L E 7

                                  MISCELLANEOUS

         7.1      DISPUTE RESOLUTION. The dispute resolution procedures of the
Asset Purchase Agreement are applicable to all disputes arising under this
Assignment.

         7.2      TRANSFERABILITY.

                  7.2.1    Entegris shall not transfer this Agreement or the
         licenses and rights granted to Entegris under this Agreement to any
         third party, by agreement, assignment, merger, asset sale,
         consolidation, operation of law, or otherwise, without the prior
         written consent of Asyst; provided, however, that Entegris may transfer
         this Agreement to a successor in ownership of all or substantially all
         of the assets of Entegris, if the successor expressly assumes in
         writing Entegris' obligations under this Agreement.

                  7.2.2    Entegris Cayman shall not transfer (a) any of the
         patents and applications assigned from Asyst to Entegris Cayman, or (b)
         this Agreement, or (c) any licenses or rights granted to Entegris
         Cayman under this Agreement to any Third Party, by agreement,
         assignment, merger, asset sale, consolidation, operation of law, or
         otherwise, without the prior written consent of Asyst; provided,
         however, that Entegris Cayman may transfer (a) the patents and
         applications assigned from Asyst to Entegris Cayman, or (b) this
         Agreement, or (c) any licenses or rights granted to Entegris Cayman
         under this Agreement to Entegris or a Subsidiary of Entegris, if
         Entegris or the Subsidiary expressly assumes in writing Entegris
         Cayman's obligations under this Agreement.

                  7.2.3    Entegris shall not permit any Entegris Subsidiary to
         transfer (a) any of the patents and applications assigned from Asyst to
         Entegris Cayman, or (b) this Agreement, or (c) any licenses or rights
         granted to Entegris Cayman under this Agreement to any Third Party, by
         agreement, assignment, merger, asset sale, consolidation, operation of
         law, or otherwise, without the prior written consent of Asyst;
         provided, however, that

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                      Page - 9 -

<PAGE>

         Entegris Subsidiaries may transfer (a) the patents and applications
         assigned from Asyst to Entegris Cayman, or (b) this Agreement, or (c)
         any licenses or rights granted to under this Agreement to Entegris or a
         Subsidiary of Entegris, if Entegris or the Subsidiary expressly assumes
         in writing the obligations under this Agreement.

                  7.2.4    Asyst shall not transfer this Agreement or the
         licenses and rights granted to Asyst under this Agreement to any third
         party, by agreement, assignment, merger, asset sale, consolidation,
         operation of law, or otherwise, without the prior written consent of
         Entegris; provided, however, that Asyst may transfer this Agreement to
         a successor in ownership of all or substantially all of the assets of
         Asyst, if the successor expressly assumes in writing Asyst's
         obligations under this Agreement.

         7.3      GUARANTEE. Entegris guarantees the performance and obligations
of Entegris Cayman under this agreement.

         7.4      CONFIDENTIALITY. The terms of this Agreement are deemed
confidential and shall not be disclosed to third parties or publicly unless
authorized in writing by all parties; except upon written agreement of the
parties or by operation of law or as required by SEC regulations. Any
information disclosed to one of the parties during the transfer and licensing of
the patents identified herein may be designated in writing by any party to be
confidential and where there is such designation said information will not be
publicly disclosed or disclosed to third parties except upon written agreement
of the parties or by operation of law or as required by SEC regulations.

         7.5      NO STRICT CONSTRUCTION. The normal rule of construction to the
effect that any ambiguities are to be resolved against the drafting Party shall
not be employed in the interpretation of this Agreement. Unless the context
clearly requires a different interpretation, words denoting the singular will
include the plural and vice versa; words denoting any gender will include all
genders; words denoting persons will include corporations, partnerships, joint
ventures, proprietorships and other business entities.

         7.6      CHOICE OF LAW. This Agreement shall be construed under, and
interpreted in accordance with, the laws of the State of Minnesota.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 10 -

<PAGE>

         7.7      EXECUTION. This Agreement may be executed in counterparts by
the Parties, each of which shall be deemed an original, and which together shall
constitute one and the same instrument, having the same force and effect as if a
single original had been executed by all the Parties.

IN WITNESS THEREOF, each of the Parties has caused this Agreement to be executed
by its duly authorized representative.

Dated: February 11, 2003                    Asyst Technologies, Inc.

                                            By:    /s/ Geoffrey Ribar
                                                   --------------------
                                            Name:  Geoffrey Ribar
                                            Title: Senior Vice President and
                                                   Chief Financial Officer

Dated: February 11, 2003                    Entegris Cayman Ltd.

                                            By:    /s/ John D. Villas
                                                   --------------------
                                            Name:  John D. Villas
                                            Title: Director

Dated: February 11, 2003                    Entegris, Inc.

                                            By:    /s/ Michael Wright
                                                   --------------------
                                            Name:  Michael Wright
                                            Title: Chief Operating Officer

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 11 -

<PAGE>

                                    EXHIBIT I

SCHEDULE Ia

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------
 PATENT
 NUMBERS                                TITLE                                ISSUE DATE/FILING DATE
---------------------------------------------------------------------------------------------------
<S>          <C>                                                             <C>
4,739,882    Container Having Disposable Liner                                 April 26, 1988
---------------------------------------------------------------------------------------------------
4,815,912    Box Door Actuated Retainer                                        March 28, 1989
             - Corresponding Patents in EP, DE, JP
---------------------------------------------------------------------------------------------------
4,995,430    Sealable Transportable Container Latch Mechanism                  February 26, 1991
             - Corresponding Patents in EP, DE, JP, SG, TW
---------------------------------------------------------------------------------------------------
5,469,963    Sealable Transportable Container Improved Liner                   November 28, 1995
             - Corresponding Patent in TW
---------------------------------------------------------------------------------------------------
5,611,452    Sealable Transportable Container Improved Liner                   March 18, 1997
---------------------------------------------------------------------------------------------------
6,042,651    Molecular Contamination Control System                            March 28, 2000
---------------------------------------------------------------------------------------------------
6,216,873    SMIF Container Including a Reticle Support Structure              April 17, 2001
             - Foreign application pending in TW
---------------------------------------------------------------------------------------------------
6,221,163    Molecular Contamination Control System                            April 24, 2001
---------------------------------------------------------------------------------------------------
6,223,396    Pivoting Side Handles                                             May 1, 2001
---------------------------------------------------------------------------------------------------
6,319,297    Modular SMIF Pod Breather, Adsorbent, and Purge Cartridges        November 20, 2001
---------------------------------------------------------------------------------------------------
6,368,411    Molecular Contamination Control System                            April 9, 2002
---------------------------------------------------------------------------------------------------
6,398,032    SMIF Pod Including Independently Support Wafer Cassette           June 4, 2002
             - Foreign applications pending in EP, HK, JP, KR
---------------------------------------------------------------------------------------------------
             SMIF Container Including an Electrostatic Dissipative Reticle
6,513,654    Support Structure                                                 February 4, 2003
             - Corresponding PCT Application pending
---------------------------------------------------------------------------------------------------
[*]          [*]                                                               [*]
---------------------------------------------------------------------------------------------------
</TABLE>

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 12 -

<PAGE>

                              EXHIBIT I, CONTINUED

SCHEDULE Ib

<TABLE>
------------------------------------------------------------------------------------------------
<S>          <C>                                                              <C>
5,740,845    Sealable Transportable Container Having Breather Assembly        April 2, 1998
------------------------------------------------------------------------------------------------
5,785,186    Substrate Housing and Docketing System                           July 28, 1998
             - Corresponding Patents in EP, CN, AU, JP
------------------------------------------------------------------------------------------------
5,810,062    Two Stage Valve for Charging and/or Vacuum Relief of Pods        September 22, 1998
------------------------------------------------------------------------------------------------
5,823,361    Substrate Support Apparatus for a Substrate Housing              October 20, 1998
------------------------------------------------------------------------------------------------
5,853,214    Aligner for a Substrate Carrier                                  December 29, 1998
             - Corresponding Patents in JP, DE, CN, AU
------------------------------------------------------------------------------------------------
5,984,116    Substrate Support Apparatus for a Substrate Housing              November 16, 1999
             - Corresponding Patents in AU, CN, JP, DE
------------------------------------------------------------------------------------------------
6,187,182    Filter Cartridge Assembly for a Gas Purging System               February 13, 2001
             (Joint Ownership with Entegris)
             - Corresponding Patent in TW
             - Foreign applications pending in CA, CN, EP, JP, KR
------------------------------------------------------------------------------------------------
</TABLE>

SCHEDULE Ic

<TABLE>
<S>          <C>                                                              <C>
------------------------------------------------------------------------------------------------
   USSN      SMIF Container with Latch Lock Mechanism                         July 10, 2001
09/902,195   - Corresponding PCT Application pending
------------------------------------------------------------------------------------------------
[*]          [*]                                                              [*]
------------------------------------------------------------------------------------------------
[*]          [*]                                                              [*]
------------------------------------------------------------------------------------------------
[*]          [*]                                                              [*]
------------------------------------------------------------------------------------------------
</TABLE>

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 13 -

<PAGE>

                                   EXHIBIT II

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------
PATENT
NUMBERS                             TITLE                                        ISSUE DATE
-------------------------------------------------------------------------------------------------
<S>          <C>                                                              <C>
4,674,939    Sealed Standard Interface Apparatus                              June 23, 1987
             - Corresponding patents in EP, DE, JP, KR
-------------------------------------------------------------------------------------------------
5,169,272    Method and Apparatus for Transferring Articles Between Two       December 8, 1992
             Controlled Environments
             - Corresponding patents in EP, JP
-------------------------------------------------------------------------------------------------
5,370,491    Method and Apparatus for Transferring Articles Between Two       December 6, 1994
             Controlled Environments
-------------------------------------------------------------------------------------------------
5,547,328    Method and Apparatus for Transferring Articles Between Two       August 20, 1996
             Controlled Environments
-------------------------------------------------------------------------------------------------
5,834,915    Substrate Housing and Docking System                             November 10, 1998
-------------------------------------------------------------------------------------------------
5,895,191    Sealable, Transportable Container Adapted for Horizontal         April 20, 1999
             Loading and Unloading
-------------------------------------------------------------------------------------------------
</TABLE>

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 14 -

<PAGE>

                                   EXHIBIT III

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------
PATENT
NUMBERS                                  TITLE                                  ISSUE DATE
------------------------------------------------------------------------------------------------
<S>          <C>                                                              <C>
4,724,874    Sealable Transportable Container Having a Particle Filtering     February 16, 1988
             System
             o Corresponding Patents in EP, DE, JP, SG
------------------------------------------------------------------------------------------------
5,848,933    Docking and Environmental Purging System for Integrated Circuit  December 15, 1998
             Wafer Transport Assemblies
------------------------------------------------------------------------------------------------
5,879,458    Molecular Contamination Control System                           March 9, 1999
             o Corresponding Patent in SG
             o Foreign applications pending in EP, JP, KR
------------------------------------------------------------------------------------------------
5,988,233    Evacuation-Driven SMIF Pod Purge System                          November 23, 1999
             o Corresponding patents in EP, HK, JP, KR
------------------------------------------------------------------------------------------------
6,056,026    Passively Activated Valve for Carrier Purging                    May 2, 2002
             o Corresponding Patent in TW
             o Foreign applications pending in CN, EP, JP, KR
------------------------------------------------------------------------------------------------
6,120,371    Docking and Environmental Purging System for Integrated Circuit  September 19, 2000
             Wafer Transport Assemblies
------------------------------------------------------------------------------------------------
6,164,664    Kinematic Coupling Compatible Passive Interface Seal             December 26, 2000
------------------------------------------------------------------------------------------------
6,368,411    Molecular Contamination Control System                           April 9, 2002
------------------------------------------------------------------------------------------------
</TABLE>

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 15 -

<PAGE>

                                   EXHIBIT IV

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------
 PATENT
 NUMBERS                                      TITLE                                      ISSUE DATE
-------------------------------------------------------------------------------------------------------
<S>               <C>                                                                 <C>
4,827,110         Method and Apparatus for Monitoring the Location of Wafer Disks     May 2, 1989
-------------------------------------------------------------------------------------------------------
4,833,306         Bar Code Remote Recognition System for Process Carriers of          May 23, 1989
                  Wafer Disks
                  - Corresponding Patents in CA, EP, DE, KR, TW
-------------------------------------------------------------------------------------------------------
4,888,473         Wafer Disk Location Monitoring System and Tagged Process            December 19, 1989
                  Carriers for Use Therewith
-------------------------------------------------------------------------------------------------------
4,974,166         Processing Systems with Intelligent Article Tracking                November 27, 1990
                  - Corresponding Patents in EP, DE, JP, KR, TW
-------------------------------------------------------------------------------------------------------
5,097,421*        Intelligent Wafer Carrier                                           March 17, 1992
                  - Corresponding Patents in EP, DE, JP, SG
-------------------------------------------------------------------------------------------------------
5,166,884         Intelligent System for Processing and Storing Articles              November 24, 1992
                  - Corresponding Patents in JP
-------------------------------------------------------------------------------------------------------
5,339,074         Very Low Frequency Tracing System                                   August 16, 1994
                  - Corresponding Patents in FR, DE, IT, JP, KR
-------------------------------------------------------------------------------------------------------
5,831,738         Apparatus and Methods for Viewing Identification Marks on           November 3, 1998
                  Semiconductor Wafers
                  - Corresponding Patents in KR
                  - Foreign application pending in JP
-------------------------------------------------------------------------------------------------------
6,473,668         Intelligent Minienvironment                                         October 29, 2002
-------------------------------------------------------------------------------------------------------
</TABLE>

* Currently in litigation with Jenoptik

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 16 -

<PAGE>
                                    EXHIBIT V

                                   ASSIGNMENT

                  WHEREAS, Asyst Technologies, Inc., has rights and interest to
a certain patents and patent applications described as follows:

<TABLE>
<CAPTION>
Patent Number/
Serial Number               Title                                                                  Issue Date/Filing Date
-------------               ------------------------------------------------------------------     ----------------------
<S>                         <C>                                                                    <C>
4,739,882                   Container Having Disposable Liner                                      April 26, 1988
4,815,912                   Box Door Actuated Retainer                                             March 28, 1989
4,995,430                   Sealable Transportable Container Latch Mechanism                       February 26, 1991
5,469,963                   Sealable Transportable Container Improved Liner                        November 28, 1995
5,611,452                   Sealable Transportable Container Improved Liner                        March 18, 1997
6,042,651                   Molecular Contamination Control System                                 March 28, 2000
6,216,873                   SMIF Container Including a Reticle Support Structure                   April 17, 2001
6,221,163                   Molecular Contamination Control System                                 April 24, 2001
6,223,396                   Pivoting Side Handles                                                  May 1, 2001
6,319,297                   Modular SMIF Pod Breather, Adsorbent, and Purge Cartridges             November 20, 2001
6,368,411                   Modular Contamination Control System                                   April 9, 2002
6,398,032                   SMIF Pod Including Independently Support Wafer Cassette                June 4, 2002
6,513,654                   SMIF Container Including an Electrostatic Dissipative Reticle          February 4, 2003
                            Support Structure
USSN                        System for Preventing Improper Insertion of FOUP Door Into FOUP        December 13, 2001
10/020,761
5,740,845                   Sealable Transportable Container Having Breather Assembly              April 2, 1998
5,785,186                   Substrate Housing and Docketing System                                 July 28, 1998
5,810,062                   Two Stage Valve for Charging and/or Vacuum Relief of Pods              September 22, 1998
5,823,361                   Substrate Support Apparatus for a Substrate Housing                    October 20, 1998
5,853,214                   Aligner for a Substrate Carrier                                        December 29, 1998
5,984,116                   Substrate Support Apparatus for a Substrate Housing                    November 16, 1999
6,187,182                   Filter Cartridge Assembly for a Gas Purging System (Joint Ownership    February 13, 2001
                            with Entegris)
USSN                        SMIF Container with Latch Lock Mechanism                               July 10, 2001
09/902,195
USSN                        Laterally Floating Latch Hub Assembly                                  December 13, 2001
10/022,309
USSN                        Transportable Container Including Internal Environment Monitor         January 24, 2002
10/042,849
An undivided fifty percent ownership interest in Application USSN 10/161,436 titled "System for Providing Electrical Ground Path
Through a Port Door" filed on June 3, 2002.
</TABLE>

                  WHEREAS, ENTEGRIS CAYMAN LTD. is desirous of acquiring any and
all such interest in and to said patents and applications.

                  NOW, THEREFORE, Be It Known, that for good and valuable
consideration, the receipt of which is hereby acknowledged by the undersigned,
the entire rights, title and interest of said above identified patents and
applications, the inventions disclosed and claimed therein, and any renewals,
continuations, divisionals, continuation-in-parts, reissues, extensions,
substitutions, foreign or domestic counterparts thereof, including any and all
rights to apply for and obtain patents therefore in all foreign countries, is
hereby sold, assigned and transferred to ENTEGRIS CAYMAN LTD.

                  The undersigned agrees to sign such papers, testify orally and
do other things at the expense of ENTEGRIS CAYMAN LTD. or its successors or
assigns, as may be reasonably necessary for the purpose of obtaining and
enforcing the patents.

                           Signed at this 11th day of February, 2003.

                                  ASYST TECHNOLOGIES, INC.

                                  By: /s/ Geoffrey Ribar
                                      ------------------

                                  Printed Name: Geoffrey Ribar

                                  Its: Senior Vice President and Chief Financial
                                       Officer

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 17 -

<PAGE>

                                   EXHIBIT VI

                                    ROYALTIES

Asyst shall be entitled to receive certain royalties on the Net Revenues (as
defined below) as set forth below:

         VI.2(a)  The sum equal to [*]% of all Net Revenues generated in the
                  semiconductor industry by Entegris, Entegris Cayman or
                  Entegris' Subsidiaries during each year with respect to (i)
                  [*] (iii) spare and replacement parts in respect of the
                  products described in (i) and (ii) of this subsection VI.2(a),
                  for a period of five (5) years after the Closing Date stated
                  in the Asset Purchase Agreement; and

         VI.2(b)  a portion of all Net Revenues generated in the semiconductor
                  industry by Entegris or Entegris' Subsidiaries during each
                  year with respect to (i) 300mm FOUPs or wafer carriers or
                  containers having substantially the same structure as a 300mm
                  FOUP and used in production of semiconductors or wafers, (ii)
                  the 300mm FOUPS purchased by Entegris from Asyst in the
                  semiconductor industry; and (iii) spare and replacement parts
                  in respect of the products described in (i) and (ii) of this
                  subsection VI.2(b) for a period of five (5) years after the
                  Closing Date as set forth below:

                  (i)   The sum equal to [*]% of such Net Revenues up to $[*]
                        million per annum;

                  (ii)  [*]% of such Net Revenues between $[*] million and $[*]
                        million per annum; and

                  (iii) [*]% of such Net Revenues over $[*] million per annum.

         For purposes hereof, the 300mm FOUPS and wafer carriers or containers
having substantially the same structure as a 300mm FOUP and used in production
of semiconductors or wafers for which Asyst is entitled to the above royalties
shall not include any of Entegris' current products or containers which are used
to ship wafers between facilities. [*].

         Notwithstanding the above, [*].

         VI.2(c)  The term "Net Revenues" shall mean the total sales price of
                  the particular product(s) for which customers are billed or
                  otherwise charged (including the lease or consignment of
                  product) for by Entegris in the usual course of business
                  during each fiscal year of Entegris, excluding: (i) revenues
                  received from services related to the particular product(s)
                  (including without limitation cleaning services); (ii) sales
                  taxes, excise taxes and other taxes levied in respect of such
                  sales; (iii) return sales; (iv) transportation and insurance
                  costs incurred by Entegris with respect to such product(s).
                  Royalties on products

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 18 -

<PAGE>

                  discounted below [*]% of the average selling price of a
                  product on a quarterly basis will be based upon [*]% of the
                  average selling price of that product on a quarterly basis.
                  Any out-of-payment-period credit adjustments for return sales
                  or other bona fide price adjustments which exceed royalties
                  payable for any period will be accrued and offset against
                  royalties which accrue to Asyst in subsequent payment periods.
                  With respect to product(s) leased or consigned by Entegris, or
                  if the pricing of a royalty-bearing product hereunder is
                  otherwise commingled with the pricing of other products and
                  services of Entegris or a wholly-owned subsidiary of Entegris,
                  then the price of the royalty-bearing products for the
                  purposes of calculating royalties shall be equal to the
                  average net sales price of all equivalent products sold by the
                  Entegris for the fiscal quarter in question, without giving
                  effect in the calculation of such average to any products
                  given away or commingled with other goods and services;
                  provided, however, that the bundling of multiple
                  royalty-bearing products together without the commingling of
                  non-royalty-bearing products or services is treated as a
                  single aggregate sale and royalty is calculated based upon the
                  aggregate sale price for such products (i.e. not the average
                  net sales price of equivalent products).

         VI.2(d)  Entegris shall keep records, with respect to the sale of all
                  the products subject to royalties under this Section V.2 and
                  the selling prices thereof. Asyst shall at its own expense
                  have a right, through an independent certified public
                  accountant selected by Asyst, to examine and audit, not more
                  than once each fiscal year, and during normal business hours
                  and upon prior reasonable notice, all such records and
                  accounts as may, under recognized accounting practices,
                  contain information bearing upon the amount of royalty payment
                  due to Asyst from Entegris under this Agreement.

                  If Asyst's calculation of royalties differs from Entegris'
                  calculation, Asyst may, at its option, deliver a notice to
                  Entegris disputing Entegris' calculation (a "Challenge
                  Notice") at any time, but in no event more than ninety (90)
                  days after the close of a calendar year with respect to
                  royalties accrued during that calendar year. If a Challenge
                  Notice is delivered to Entegris pursuant to the preceding
                  sentence, Asyst and Entegris shall, during the thirty (30)
                  days following such delivery, use all commercially reasonable
                  efforts to reach agreement. If during such period Asyst and
                  Entegris are unable to agree regarding the disputed
                  calculation, Asyst and Entegris shall promptly thereafter
                  select an Accounting Referee (as hereinafter defined) and
                  cause such Accounting Referee to promptly review this
                  Agreement, any related agreements, all such records and
                  accounts as may, under recognized accounting practices,
                  contain information bearing upon the amount of royalty payment
                  due to Asyst from Entegris under this Agreement and the
                  respective parties' disputed calculations. The Accounting
                  Referee shall deliver to Asyst and Entegris as promptly as
                  practicable a report setting forth the Accounting Referee's
                  calculation. Such report shall be final and binding upon Asyst
                  and

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 19 -

<PAGE>

                  Entegris. The cost of such report shall be borne by (i) Asyst
                  if the Accounting Referee's calculation changes royalties by
                  less than [*] percent ([*]%) of the royalties stated in the
                  disputed Royalty Statement(s); or (ii) the Entegris if the
                  Accounting Referee's calculation changes royalties by greater
                  than [*] percent ([*]%) of the royalties stated in the
                  disputed Royalty Statement(s). The "Accounting Referee" shall
                  mean a reputable firm of independent auditors of national
                  standing other than the auditors of the Entegris, at or prior
                  to the Closing Date. In any event, adjustment shall be made to
                  compensate for any errors or omission disclosed by Accounting
                  Referee's report.

         VI.2(e)  The thresholds for determining the amount of royalties to be
                  paid hereunder shall be based on a calendar year. Royalties
                  hereunder shall be remitted to Asyst quarterly for royalties
                  accrued during each preceding quarter, based on Net Revenues
                  to date for the current calendar year. The Net Revenue
                  thresholds in Section VI.2(b) shall be prorated for partial
                  years at the beginning and end of the royalty term.

         VI.2(f)  Within forty-five (45) days after the end of each fiscal
                  quarter of Entegris, commencing upon the close of the first
                  fiscal quarter after the Closing Date and continuing
                  thereafter until all of the royalties payable hereunder shall
                  have been reported and paid, Entegris shall furnish Asyst a
                  statement signed by a duly authorized officer of Entegris
                  showing all products subject to royalties which were sold
                  during such quarter and the prices at which they were sold,
                  and the amount of the royalty payable thereon (the "Royalty
                  Statement"). If no products subject to royalty have been sold,
                  that fact shall be set forth in such a statement. The
                  royalties stated to be payable to Asyst in the Royalty
                  Statement shall be paid within forty-five (45) days after the
                  end of that quarter in which they accrue.

         VI.2(g)  A bonus royalty of [*] percent ([*]%) on revenues generated by
                  Entegris and Entegris' Subsidiaries in excess of [*] from
                  Entegris' current and future SMIF Pods and all royalty bearing
                  products for combined calendar years 2003, 2004 and 2005. The
                  maximum payment under this section shall not exceed [*]. For
                  purposes hereof, Asyst shall be entitled to credit for Asyst
                  and Entegris' respective sales for 2003 prior to the Effective
                  Date for the products identified in Sections VI.2(a) and
                  VI.2(b).

PATENT ASSIGNMENT AND CROSS-LICENSE AND TRADEMARK LICENSE AGREEMENT

[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                     Page - 20 -<PAGE>

                                                                     EXHIBIT 4.2

                                           Merrill Lynch Global Emerging Markets
                                           Partners, L.P.

                                           Brian A. Renaud
                                           Merrill Lynch Global Partners, Inc.
                                           Vice President

                                           World Financial Center, North Tower
                                           250 Vesey Street
                                           New York, NY  10283-1327
                                           U.S.A.

[LOGO]Merrill Lynch                        June 13, 2003

Arthur J. Young
PSi Technologies Holdings, Inc.
PSi Technologies, Inc.
Electronics Avenue
FTI Complex, Taguig
Metro Manila 1604
Philippines

Dear Mr. Young:

Merrill Lynch Global Emerging Markets Partners, L.P. ("MLGEMP") would like to
express a non-binding indication of interest in pursuing an additional
investment in PSi Technologies, Inc. (the "Company"). An investment, if
consummated, would be in the form of a $4.0 million aggregate principal amount
Exchangeable Senior Subordinated Note (the "Note") of the Company for a cash
consideration of $4.0 million. The Note would accrue interest at an annual rate
of 10.00% net of any withholding taxes, the payment of which would be the
responsibility of the Company. The Note (or Notes to the extent of a transfer of
an interest in all or any part of the Note) would be exchangeable at the option
of the holders into 2,721,088 shares of common stock of PSi Technologies
Holdings, Inc. ("Holdings"), equal to a fully diluted ownership stake of 17%
(excluding the exchange of any accrued and unpaid interest), at a price of $1.47
per share, subject to customary antidilution adjustments and the adjustments
outlined in the attached term sheet dated June 13, 2003 (the "Term Sheet'). Such
transaction, if consummated, would be on the general terms and conditions
contained in the Term Sheet attached to this letter and included herein by
reference, subject to any subsequent changes, additions or deletions reflected
in the definitive agreements as may be agreed to by the parties.

This letter and the Term Sheet (together, the "Letter of Interest") (i) shall
not be deemed to be an offer or an agreement to agree; (ii) does not create a
binding obligation, fiduciary relationship, or joint venture between the
parties, and (iii) assumes the accuracy and completeness of the information
previously provided by you. A consummation of this investment would be subject
to the satisfactory completion of MLGEMP's due diligence review, the negotiation
and execution of definitive legal documentation acceptable to all parties and
their respective counsels, and the approvals and consents of governmental
agencies, third parties and MLGEMP as may be necessary or desirable, and the
satisfaction of the conditions precedent to closing contained in the definitive
legal documentation.

This Letter of Interest is delivered to you with the understanding and on the
condition that neither this Letter of Interest, nor the existence of a potential
transaction with MLGEMP or any of its Affiliates shall be disclosed publicly or
privately without the written permission of MLGEMP.

<PAGE>

This Letter of Interest may not be contradicted by evidence of any actual or
alleged prior, contemporaneous or subsequent understandings or agreements of the
parties whether oral, expressed or implied, other than in a writing that
expressly amends or supersedes this Letter of Interest. There are no unwritten
oral understandings or agreements between the parties.

To indicate your interest in having us proceed with consideration of this
transaction, please sign this letter and fax it to me at (662) 685-3582 by the
close of business on June 15, 2003. Please mail the original signature page(s)
to me at your earliest convenience.

The binding provisions of this Letter of Interest will be governed by and
construed in accordance with the laws of the State of New York, without regard
to conflict of law principles.

                                       Very truly yours,

                                       MERRILL LYNCH GLOBAL EMERGING
                                       MARKETS PARTNERS, L.P.
                                       By:  Merrill Lynch Global Capital, L.L.C.
                                                Its General Partner
                                       By:  Merrill Lynch Global Partners, Inc.
                                                Its Managing Member

                                       By /s/ Brian Renaud
                                         ---------------------------------------
                                         Name: Brian A. Renaud
                                         Title: Vice President

Accepted and Agreed
as of the date
first written above:

PSi Technologies Holdings, Inc.

By  /s/ Arthur J. Young, Jr.
    ---------------------------------
    Name: Arthur J. Young
    Title: President

PSi Technologies, Inc.

By  /s/ Arthur J. Young, Jr.
    ---------------------------------
    Name: Arthur J. Young
    Title: President

                                       2

<PAGE>

                         PSi Technologies Holdings, Inc.
                              PSi Technologies Inc.
                             Preliminary Term Sheet
                                  June 13, 2003

THIS TERM SHEET IS A NON-BINDING DOCUMENT PREPARED FOR DISCUSSION PURPOSES ONLY,
and the proposed Investment is specifically subject to the negotiation of
definitive documentation including a purchase agreement and other appropriate
agreements and documents; the performance of confirmatory business, legal and
tax due diligence; receipt of all internal approvals and other conditions
contained herein, all satisfactory to MLGEMP (as defined below) at its sole
discretion.

Operating Company:                      PSi Technologies, Inc. ("PSi" or the
                                        "Company")

Holding Company:                        PSi Technologies Holdings, Inc.
                                        ("Holdco")

Investor:                               Merrill Lynch Global Emerging Markets
                                        Partners, L.P. and/or an Affiliate
                                        ("MLGEMP").

Exchangeable Senior                     MLGEMP would purchase a USD$ 4.0 million
Subordinated Notes:                     aggregate principal amount Senior
                                        Subordinated Note (the "Note") of the
                                        Company for a cash consideration of
                                        USD$ 4.0 million. The Note shall accrue
                                        interest at an annual rate of 10.0% net
                                        of any  withholding taxes, the payment
                                        of such taxes to be the responsibility
                                        of the Company. Interest shall be
                                        payable semi-annually. If the Company
                                        cannot pay the required interest payment
                                        in cash,  it may pay in-kind.

Maturity Date:                          The principal amount of USD$ 4.0 million
                                        and the accrued interest shall be repaid
                                        in full upon June 1, 2008, if MLGEMP
                                        chooses not to exercise its exchange
                                        rights.

Exchange:                               The Note will be exchangeable at the
                                        option of the holders into shares of
                                        common stock of Holdco. The Note will be
                                        exchanged for 2,721,088 shares of common
                                        stock at a price (the "Exchange Price")
                                        of $1.47 per share, subject to customary
                                        antidilution adjustments and the
                                        adjustments set forth below.

Reduction of Exchange Price:            (a) In the event that Holdco reports a
                                            third quarter period ending 30th
                                            September, 2003 EBITDA figure of
                                            less than USD$ 3.89 million, the
                                            Exchange Price will be reduced to
                                            $1.29, subject to customary
                                            antidilution adjustments.

                                        (b) In the event that Holdco reports a
                                            fourth quarter period ending 31st
                                            December, 2003 EBITDA figure of less
                                            than USD$ 3.92 million, the Exchange
                                            Price will be reduced to (i) if the
                                            Exercise Price was previously
                                            reduced pursuant to (a) above,
                                            $1.15, subject to customary
                                            antidilution adjustments or (ii) if
                                            the Exercise Price was not
                                            previously reduced pursuant to (a)
                                            above, $1.29, subject to customary
                                            antidilution adjustments.

Redemption:                             In the event that, at any time after

<PAGE>

                                        three years from the date of the Note,
                                        the average last reported sale price of
                                        Holdco American Depositary Receipts for
                                        a 30 consecutive day trading period on
                                        the Nasdaq National Market (the
                                        "Nasdaq") is at least $3.00 and the
                                        average daily trading volume on the
                                        Nasdaq during such 30 day period is
                                        equal to at least 33.33% of the number
                                        of shares of common stock of Holdco for
                                        which the Note is then exchangeable, the
                                        Company may send written notice (the
                                        "Redemption Notice") to MLGEMP
                                        indicating that the Company desires to
                                        redeem the Note, specifying the date of
                                        such redemption, which will be not
                                        earlier than 30 days after the date of
                                        the Redemption Notice (the "Redemption
                                        Date"), the redemption price, which will
                                        be the principal amount outstanding on
                                        the Note plus accrued and unpaid
                                        interest, and the fulfillment of the
                                        conditions set forth above. The Note
                                        will be redeemed on the Redemption Date
                                        unless MLGEMP exercises its right to
                                        exchange the Note prior to the
                                        Redemption Date.

Ranking:                                The Notes will be an unsecured
                                        obligation. They will rank senior in
                                        right of payment with any future
                                        subordinated indebtedness, equal in
                                        right of payment with any of the
                                        existing subordinated indebtedness, and
                                        subordinated in right of payment to any
                                        of the existing senior indebtedness.

Use of Proceeds:                        The Company would use proceeds for the
                                        repayment of supplier credits and
                                        capital expenditures payables.

Covenants:                              As long as the Notes remain outstanding,
                                        the covenants shall limit the Company's
                                        and its subsidiaries' ability to:

                                        (a) amalgamate, acquire or merge with
                                            another company, business concern,
                                            firm or person;

                                        (b) sell, consolidate, recapitalize,
                                            spin-off, the Company or any
                                            subsidiary of the Company;

                                        (c) undertake any transactions with an
                                            affiliate not in the ordinary course
                                            of business and not on an
                                            arms-length basis (other than
                                            transactions with MLGEMP or its
                                            affiliates);

                                        (d) sell or otherwise dispose of any of
                                            the material assets, except in the
                                            ordinary course of business;

                                        (e) pay dividends, repurchase stock or
                                            make any investment in any person
                                            other than a wholly-owned subsidiary
                                            of the Company;

                                        (f) incur any indebtedness other than
                                            extensions of credit arising from
                                            current discussions with existing
                                            lenders;

<PAGE>

                                        (g) incur any new liens on the Company's
                                            assets unless the Notes are equally
                                            secured, other than liens incurred
                                            in connection with extensions of
                                            credit by existing lenders pursuant
                                            to current discussions; and

                                        (h) with respect to the Company's
                                            subsidiaries, issue or transfer
                                            equity or debt.

Default:                                In the event of a breach of the
                                        covenants contained in this term sheet,
                                        MLGEMP shall have the right to declare
                                        all or any part of the Notes to be
                                        immediately due and payable. Upon any
                                        cancellation or suspension of the
                                        Company's financial indebtedness due to
                                        any event of default, MLGEMP is
                                        entitled to declare the Notes due and
                                        payable prior to maturity.

Expenses:                               The Company shall bear all expenses
                                        relating to this transaction.

Governing Law:                          The agreements shall be governed by and
                                        construed in accordance with the laws of
                                        The State of New York applicable to
                                        contracts executed in and to be
                                        performed in that state.

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