Document:

<PAGE>
                                                                  Exhibit 10.2.6

                           AMENDMENT NO. 6 AND WAIVER

         AMENDMENT NO. 6 AND WAIVER (this "Amendment") dated as of June 14,
2002, among CR BRIGGS CORPORATION (the "Company"), a corporation organized under
the laws of the State of Colorado, the Lenders named on the signature pages
hereof, and BNP PARIBAS, as successor-in-interest to Banque Paribas, New York
Branch, in its capacity as agent for the Lenders (the "Agent").

                                   WITNESSETH:

         WHEREAS, the Company, the Lenders and the Agent have entered into the
Loan Agreement dated as of December 6, 1995, and amended as of April 8, 1998,
August 19, 1998, July 8, 1999, March 26, 2001 and March 25, 2002 (as amended,
modified and supplemented from time to time, the "Loan Agreement"), providing
for certain Loans to be made to the Company by the Lenders to finance the
acquisition and construction of the Project;

         WHEREAS, the Company has requested that the Loan Agreement be further
amended and that certain matters be waived by the Lenders, subject and pursuant
to the terms and conditions of this Amendment;

         NOW, THEREFORE, the Company, the Lenders and the Agent wish to amend
the Loan Agreement in certain respects, and accordingly, the parties hereto
agree as follows:

         Section 1. Definitions. Terms used but not defined herein shall have
the respective meanings ascribed to such terms in the Loan Agreement.

         Section 2. Conditions Precedent. The agreements set forth in Sections 3
and 4 of this Amendment shall be subject to the occurrence of the following: (i)
the Lenders receipt of an Officer's Certificate that no Event of Default, which
is not otherwise being waived by the terms hereof, under the Loan Agreement
shall have occurred and be continuing; and (ii) Closing occurring pursuant to
the Agreement described in Section 3 below.

         Section 3. Waiver. Subject to the occurrence of the conditions
described in Section 2 above and the Company's and Guarantor's compliance with
the provisions of Section 4 below, the Lenders hereby waive: (i) the default
caused by Company's failure to make the Loan payment due in May, 2002; and (ii)
the requirements and obligations of the Company under Section 8.07 of the Loan
Agreement with respect to the sale by the Company of the crusher at the Project
(the "Crusher") pursuant to the terms and conditions set forth in that certain
Purchase Agreement, dated effective May 14, 2002 ("Agreement"), between
Guarantor and Corner Bay Silver Inc. ("Corner Bay"), a copy of which Agreement
is attached as Exhibit A hereto.

                                       1
<PAGE>

         Section 4. Amendments. The Loan Agreement is amended as follows:

         (a) Add the following provision after the last sentence of Section 8.07
of the Loan Agreement:

                  "Notwithstanding the foregoing provisions of the prior
         sentence of this Section 8.07, the proceeds from the sale of the
         Crusher pursuant to the Agreement shall, within five (5) days of
         receipt by Borrower or Guarantor, be applied in the following
         priorities: (i) U.S. $600,000 in payments necessary to remove
         mechanics' and materialmen's liens, potential defaults and obligations
         to vendors; (ii) U.S. $502,358.80, as payment necessary to pay off the
         purchase money security interest lien on the Crusher, currently held by
         John Deere Corporation; (iii) U.S. $950,000 to repayment of the Loans,
         50% of which (i.e., U.S. $475,000) shall be applied to Loan payments
         due starting in May, 2002, and 50% of which (i.e., U.S. $475,000) shall
         be applied to Loan payments due, in reverse order of maturity, starting
         with the June, 2003 payment, and (iv) 75% of amounts in excess of the
         amounts in (i), (ii) and (iii) above will be applied to Loan payments
         in reverse order of maturity, starting in April, 2003, and 25% of which
         shall be applied to Loan payments due in order of maturity, starting in
         August, 2002."

         (b) The text of Section 8.29, which was added to the Loan Agreement by
         Amendment No. 5, dated March 25, 2002, is deleted in its entirety and
         replaced with the following provisions: "To the extent that Borrower
         reduces total trade accounts payable below $2,250,000, the Lenders will
         receive payments, which shall be applied to the Principal balance due,
         equal to all such reductions."

                  Section 5. Guarantor Covenant. Guarantor, by its execution of
this Amendment, hereby covenants that: (i) if and to the extent it receives any
payments or proceeds pursuant to the Agreement, it shall cause these proceeds
and payments to be paid and applied as described in Section 4 above; and (ii)
Guarantor's guarantee obligations under the Guarantee Agreement shall remain in
full force and effect.

                  Section 6. Agent and Lender Covenant. Agent and Lender hereby
covenant to execute such releases of Security Documents with respect to the
Crusher as may be reasonably requested by the Company, in order to pursue the
sale of the Crusher.

                  Section 7. Documents Otherwise Unchanged. Except as herein
provided, the Loan Agreement shall remain unchanged and in full force and
effect, and each reference to the Loan Agreement shall be a reference to the
Loan Agreement as amended hereby and as the same may be further amended,
supplemented and otherwise modified and in effect from time to time.

                  Section 8. Counterparts. This Amendment may be executed in any
number of counterparts, each of which shall be identical and all of which, when
taken together, shall constitute one and the same instrument, and any of the
parties hereto may execute this Amendment by signing any such counterpart.

                                       2
<PAGE>

                  Section 9. Binding Effect. This Amendment shall be binding
upon and inure to the benefit of the parties hereto and their respective
successors and assigns.

                  Section 10. Governing Law. This Amendment shall be governed
by, and construed in accordance with, the laws of the State of New York.

         IN WITNESS WHEREOF, the parties hereto have caused this Waiver to be
duly executed as of the day and year first above written.

                                           "BORROWER"

                                           CR BRIGGS CORPORATION

                                           By:      /s/Gary C. Huber
                                                  ---------------------------
                                           Name:    Gary C. Huber
                                                  ---------------------------
                                           Title:   Vice President
                                                  ---------------------------

                                           "GUARANTOR"

                                           CANYON RESOURCES CORPORATION

                                           By:      /s/ Gary C. Huber
                                                  ---------------------------
                                           Name:    Gary C. Huber
                                                  ---------------------------
                                           Title:   Vice President
                                                  ---------------------------

                                           "AGENT"

                                           BNP PARIBAS, as agent for the Lenders

                                           By:      /s/ Sean Finnegan
                                                  ---------------------------
                                           Name:      Sean Finnegan
                                                  ---------------------------
                                           Title:   Vice President
                                                  ---------------------------

                                           "LENDERS"

                                           BNP PARIBAS

                                           By:       /s/ Barry Liu
                                                  ---------------------------
                                           Name:    Barry Liu
                                                  ---------------------------
                                           Title:   Vice President
                                                  ---------------------------

                                           By:      /s/ Sean Finnegan
                                                  ---------------------------
                                           Name:    Sean Finnegan
                                                  ---------------------------
                                           Title:   Vice President
                                                  ---------------------------

                                       3
<PAGE>

                                           BAYERISCHE HYPO-UND
                                           VEREINSBANK AG, NEW YORK
                                           BRANCH

                                           By:      /s/ Andrew G. Mathews
                                                  ---------------------------
                                           Name:    Andrew G. Mathews
                                                  ---------------------------
                                           Title:   Managing Director
                                                  ---------------------------

                                           By:      /s/ Carmen De Paula
                                                  ---------------------------
                                           Name:    Carmen De Paula
                                                  ---------------------------
                                           Title:   Associate Director
                                                  ---------------------------

                                          NM ROTHSCHILD & SONS LIMITED

                                           By:      /s/ C. Coleman
                                                  ---------------------------
                                           Name:    C. Coleman
                                                  ---------------------------
                                           Title:   Director
                                                  ---------------------------

                                           By:      /s/ N. A. Wood
                                                  ---------------------------
                                           Name:    Nicholas A. Wood
                                                  ---------------------------
                                           Title:   Assistant Director
                                                  ---------------------------

                                      4
<PAGE>

                                    EXHIBIT A

                               PURCHASE AGREEMENT

Canyon Resources Corporation of 14142 Denver West Parkway, Suite 250, Golden,
Colorado 80401

Dear Sirs:

RE:      BRIGGS MINE CRUSHING PLANT AND ANCILLARY ITEMS LOCATED IN CALIFORNIA

This letter will set out the general terms and conditions of the proposed
purchase of the Briggs Mine Crushing Plant and Ancillary Items (the "PLANT") of
Canyon Resources Corporation (the "CORPORATION") by Corner Bay Silver Inc. or
such other corporation as may be chosen by Corner Bay Silver Inc. (the
"PURCHASER").

It is the intent of this letter that it set out with sufficient particularity
the details of the transaction contemplated by the parties so that the parties
may establish the general terms of the formal, comprehensive asset purchase
agreement (the "AGREEMENT") to be executed by them and which will be prepared
for the Closing (the "CLOSING"), which will take place within 30 days of the
Corporation's signature of this letter, as more fully set forth at paragraph
4(a) hereof. This letter shall be legally binding and shall be effective as of
its signature by the Corporation, and shall constitute the sole contract between
the Corporation and Purchaser if the final Agreement is not executed within 30
days of Corporation's signature of this letter.

1.       ASSETS

The Purchaser will purchase the Plant, which is 100% owned or leased by the
Corporation and more particularly described in Schedule A attached to this
letter. All such assets comprising the Plant will be purchased free and clear of
any encumbrances and will be purchased upon the following terms and conditions:

         (a)      The Purchaser will purchase the Plant that will include
                  machinery, equipment and ancillary items as set out in
                  Schedule A. Such assets as set out in Schedule A are intended
                  to be removed from the Corporation's property in the State of
                  California, USA and transported at Purchaser's cost to the
                  Purchaser's property in Sonora, Mexico by common carrier.

         (b)      The Corporation will provide all documentation in its
                  possession related to the design, installation, maintenance,
                  and operation of items listed in Schedule A, including, but
                  not limited to, manufacturer's operating and maintenance
                  manuals, specifications and drawings related to the original
                  and subsequent installation of equipment, Corporation's
                  operating and maintenance history, including preventive
                  maintenance procedures and records and correspondence relating
                  to purchase, maintenance and operation of equipment. All
                  warranties and

                                       1
<PAGE>

                  maintenance records with respect to machinery, equipment and
                  ancillary items are to be made available as soon as practical
                  and transferred to the Purchaser, in all cases before Closing.

         (c)      The Corporation will give to the Purchaser and its
                  representatives such access to the property (the "PREMISES")
                  where the Plant is located, and such other authorization as
                  may be necessary, to enable the Purchaser and its
                  representatives to conduct reviews of the Plant and to
                  complete activities related to the dismantling and movement of
                  the equipment off-site. The Purchaser will endeavour to remove
                  all equipment from the Premises within 180 days from the date
                  this letter is signed by the Corporation. Purchaser will
                  ensure that the immediate Plant area is left free of all
                  equipment described in Schedule A and that only concrete
                  foundations are remaining upon completion.

         (d)      After Closing, the Corporation will provide as part of the
                  Agreement, without additional cost, up to 500 hours of use of
                  the Corporation's 40-ton crane for use in the dismantling and
                  loading of trucks to transport equipment off-site. The crane
                  will normally be available to the Purchaser during daylight
                  hours during a 12-week period after Closing when the equipment
                  is disassembled and transported. Purchaser will provide fuel,
                  lubricants, and operator and make the crane available for
                  preventive and corrective maintenance, as required. The
                  Corporation will also provide, during the 12-week dismantling
                  and shipping period, electrical power and water as required
                  to: (i) test operate machinery and motors, (ii) make repairs
                  as needed, and (iii) clean and prepare equipment for shipment.

         (e)      No action taken by the Purchaser or its representatives
                  hereunder shall constitute a trespass. If, prior to the end of
                  the date fixed for Closing, the Purchaser elects for any
                  reason not to proceed with the purchase of the Plant, it may
                  terminate the Agreement by giving written notice to the
                  Corporation of its intention to so terminate, whereupon all of
                  the obligations otherwise imposed upon the Purchaser under the
                  Agreement shall be of no further force or effect, and
                  Corporation shall be entitled to retain the down payment of
                  US$250,000 paid by the Purchaser pursuant to paragraph 2(a).
                  If the Purchaser has not provided payment of shares pursuant
                  to paragraph 2(b) within 30 days of the date of acceptance of
                  this letter, then the Agreement will terminate with no further
                  obligations between the parties, unless the parties mutually
                  agree to extend the Closing date, and Corporation shall be
                  entitled to retain the down payment of US$250,000 paid by
                  Purchaser pursuant to paragraph 2(a).

         (f)      The Purchaser will not assume any liabilities of the
                  Corporation, other than as expressly provided herein. Without
                  limiting the generality of the foregoing, it is understood and
                  agreed that the following liabilities are not being assumed by
                  the Purchaser:

                  i)       sales commission payable with respect to the
                           transactions described herein,

                                       2
<PAGE>

                  ii)      insurance coverage of the Plant until the Purchaser
                           has taken possession and title at Closing, and

                  iii)     any and all environmental liabilities associated with
                           the Plant.

2.       PURCHASE PRICE

         (a)      Upon the Corporation's signature of this letter, the Purchaser
                  will pay to the Corporation a down payment of US$250,000 to
                  secure an exclusive 30-day purchase period for the Plant,
                  commencing at the date of the Corporation's signature of this
                  letter. This payment is refundable only if the Corporation's
                  Board of Directors fails to approve the sale of the Plant or
                  the Corporation otherwise fails to give effect to the
                  transaction contemplated herein.

         (b)      Upon Closing, 850,000 common shares of the Purchaser shall be
                  issued to the Corporation, subject to appropriate regulatory
                  approval. It is anticipated that a hold period will be imposed
                  on the shares. Notwithstanding such restrictions, the
                  Corporation shall be allowed to sell shares, provided that,
                  such sales are in compliance with applicable securities laws
                  and regulations.

         (c)      If the net price received by the Corporation from the sale of
                  all of the shares (i.e., net of commissions, discounts, taxes
                  and other fees for transfer or sale), plus the amount of cash
                  paid to the Corporation pursuant to paragraph 2(a), is less
                  than US$2,250,000, the Purchaser shall pay the difference to
                  Corporation by wire transfer in immediately available funds,
                  within 10 calendar days after being notified in writing by the
                  Corporation of the amount of that difference. The Corporation
                  shall accompany that notice with reasonable documentation that
                  evidences the amount of net price received by the Corporation.

3.       CONDUCT OF BUSINESS

From the date of its signature of this letter until the Closing, the Corporation
will maintain the Plant in the ordinary and usual course, properly insured, will
confer regularly with the Purchaser to report on the status of the Plant and
will not make any decisions likely to have a material effect on the Plant,
including Plant operation, without consulting with and obtaining the approval of
the Purchaser (such approval not to be unreasonably withheld).

4.       DATE OF THE AGREEMENT AND CLOSING

         (a)      The Closing will take place within 30 days of the date of the
                  Corporation's signature of this letter. If the signature of
                  this letter has not occurred by May 15, 2002, then the entire
                  offer to purchase shall be null and void. The Corporation
                  shall provide usual and normal representations and warranties
                  in respect of its sole and unencumbered ownership of the Plant
                  to allow the Purchaser to take free and clear title and
                  control of the Plant and remove the Plant from the
                  Corporation's

                                       3
<PAGE>
                  Premises. OTHERWISE, CORPORATION MAKES NO IMPLIED OR EXPRESS
                  WARRANTIES REGARDING THE CONDITION OF THE PLANT OR REGARDING
                  ITS FITNESS FOR ANY PARTICULAR PURPOSE, AND PURCHASER TAKES
                  THE PLANT "AS IS".

         (b)      Closing is subject to the approval by the Boards of Directors
                  of the Corporation and the Purchaser, as well as all required
                  regulatory approvals, within the 30-day period described in
                  Paragraph 4(a).

5.       CONFIDENTIALITY

The Purchaser and the Corporation will keep this letter and their mutual
interest in a proposed transaction (as well as all information obtained in
connection with their respective due diligence investigations), including any
negotiations between the Purchaser and the Corporation in respect thereof,
strictly confidential except as required by regulatory authorities. Upon
execution of this letter, the Corporation will cease any and all discussions,
whether direct or indirect, with persons other than the Purchaser, with respect
to the sale of the Plant and will enter into no other discussions with third
parties prior to either of the termination events set forth in paragraphs 1(e)
or 4(b).

6.       TERMINATION

This letter may be terminated and the transaction contemplated hereby may be
abandoned or terminated:

         (a)      at any time by the mutual agreement of the parties hereto,

         (b)      by the Purchaser, as set forth in paragraphs 1(e) and 4(b); or

         (c)      by the Corporation, as set forth in paragraph 4(b).

7.       GENERAL PROVISIONS

         (a)      Each party hereto represents and warrants that it is duly
                  authorized and has all necessary power and authority to
                  execute and deliver this letter and to perform its obligations
                  hereunder. It is expressly agreed and acknowledged that no
                  other agreement or meeting of the minds has been reached.
                  Accordingly, if for any reason whatsoever the purchase of the
                  Plant is not consummated, no party hereto shall be entitled to
                  any form of relief whatsoever, including, without limitation,
                  injunctive relief or damages.

         (b)      This letter may be executed in two or more counterparts, any
                  one of which need not contain the signature of more than one
                  party, but all such counterparts taken

                                       4
<PAGE>
                  together will constitute one and the same agreement and shall
                  be governed by the laws of the State of California.

         (c)      Each party hereto shall bear all expenses incurred by it in
                  connection with this letter, including, without limitation,
                  the charges of their respective legal counsel, accountants,
                  financial advisors and finders.

Please indicate your consent and agreement to the foregoing by signing both
copies of this Option to Purchase Agreement in the space provided below and
returning one fully executed copy (which return may be made by fax to (416)
368-7141).

                                        Yours very truly,

                                        Corner Bay Silver Inc.
                                        ("Purchaser")

                                        By:
                                           -------------------------------------
                                            Authorized Signing Officer

Agreed to and acknowledged this          day of May, 2002.

                                        Canyon Resources Corporation
                                        ("Corporation")

                                        By:

                                           -------------------------------------
                                            Authorized Signing Officer

                                       5<PAGE>
                                                                    EXHIBIT 10.1

         THIS LOAN AND SECURITY AGREEMENT dated May 10, 2002, between SILICON
VALLEY BANK ("Bank"), whose address is 3003 Tasman Drive, Santa Clara,
California 95054 with a loan production office at 4410 Arapahoe Avenue, Suite
200, Boulder, CO 80303 and ADVANCED ENERGY INDUSTRIES, INC. ("Borrower"), whose
address is 1625 Sharp Point Drive, Fort Collins, CO 80525 provides the terms on
which Bank will lend to Borrower and Borrower will repay Bank. The parties agree
as follows:

1        ACCOUNTING AND OTHER TERMS

         Accounting terms not defined in this Agreement will be construed
following GAAP. Calculations and determinations must be made following GAAP. The
term "financial statements" includes the notes and schedules. The terms
"including" and "includes" always mean "including (or includes) without
limitation," in this or any Loan Document. Capitalized terms in this Agreement
shall have the meanings set forth in Section 13.

2        LOAN AND TERMS OF PAYMENT

2.1      PROMISE TO PAY.

         Borrower promises to pay Bank the unpaid principal amount of all Credit
Extensions and interest on the unpaid principal amount of the Credit Extensions.

2.1.1    REVOLVING ADVANCES.

         (a) Bank will make Advances not exceeding (i) the lesser of (A) the
Committed Revolving Line or (B) the Borrowing Base, if applicable, minus (ii)
the FX Reserve and all amounts for services utilized under the Cash Management
Services Sublimit. Amounts borrowed under this Section may be repaid and
reborrowed during the term of this Agreement. Notwithstanding the foregoing, the
Borrowing Base shall not be applied at any time that the aggregate amount of
Credit Extensions outstanding, or that would be outstanding immediately
following a requested Advance, are equal to or less than $10,000,000.

         (b) To obtain an Advance, Borrower must notify Bank by facsimile or
telephone by 3:00 p.m. Pacific time on the Business Day the Advance is to be
made. Borrower must promptly confirm the notification by delivering to Bank the
Payment/Advance Form attached as Exhibit B. Bank will credit Advances to
Borrower's deposit account. Bank may make Advances under this Agreement based on
instructions from a Responsible Officer or his or her designee or without
instructions if the Advances are necessary to meet Obligations which have become
due. Bank may rely on any telephone notice given by a person whom Bank believes
is a Responsible Officer or designee. Borrower will indemnify Bank for any loss
Bank suffers due to such reliance.

         (c) The Committed Revolving Line terminates on the Revolving Maturity
Date, when all Advances are immediately payable.

2.1.2    FOREIGN EXCHANGE SUBLIMIT.

         If there is availability under the Committed Revolving Line and the
Borrowing Base (if applicable), then Borrower may enter in foreign exchange
forward contracts with the Bank under which Borrower commits to purchase from or
sell to Bank a set amount of foreign currency more than one business day after
the contract date (the "FX Forward Contract"). Bank will subtract 10% of each
outstanding FX Forward Contract from the foreign exchange sublimit, which is a
maximum of $10,000,000 (the "FX Reserve"). The total FX Forward Contracts at any
one time may not exceed 10 times the amount of the FX Reserve. Bank may
terminate the FX Forward Contracts if an Event of Default occurs.

2.1.3    CASH MANAGEMENT SERVICES SUBLIMIT.

         Borrower may use up to $5,000,000 (the "Cash Management Services
Sublimit") for Bank's Cash Management Services, which may include merchant
services, direct deposit of payroll, business credit card, and check cashing
services identified in various cash management services agreements related to
such services (the "Cash Management Services"). Such aggregate amounts utilized
under the Cash

<PAGE>

Management Services Sublimit will at all times reduce the amount otherwise
available to be borrowed under the Committed Revolving Line. Any amounts Bank
pays on behalf of Borrower or any amounts that are not paid by Borrower for any
Cash Management Services will be treated as Advances under the Committed
Revolving Line and will accrue interest at the rate for Advances.

2.2      OVERADVANCES.

         If Borrower's Obligations under Section 2.1.1 and Section 2.1.2 exceed
the lesser of either (i) the Committed Revolving Line or (ii) the Borrowing Base
(if applicable), Borrower must immediately pay Bank the excess.

2.3      INTEREST RATE AND PAYMENTS ON COMMITTED REVOLVING LINE.

         (a) Interest Rate. Advances accrue interest on the outstanding
principal balance at a per annum rate of 1.00 percentage point below the Prime
Rate. After an Event of Default, Obligations accrue interest at 5 percent above
the rate effective immediately before the Event of Default. The interest rate
increases or decreases when the Prime Rate changes. Interest is computed on a
360 day year for the actual number of days elapsed.

         (b) Payments. Interest due on the Committed Revolving Line is payable
on the same date of each month as the date of the month this Agreement is dated.
Payments received after 12:00 noon Pacific time are considered received at the
opening of business on the next Business Day. When a payment is due on a day
that is not a Business Day, the payment is due the next Business Day and
additional fees or interest accrue.

2.4      AUTHORIZATION TO DEBIT ACCOUNTS.

         Borrower authorizes Bank to debit any of Borrower's deposit accounts
with Bank including Account Number ____________________________ for principal
and interest payments currently owing to Bank or any other amounts Borrower owes
Bank. Bank will promptly notify Borrower when it debits Borrower's accounts.
These debits are not a set-off.

2.3      FEES.

         (a) Commitment Fee. Borrower will pay to Bank a fully earned,
non-refundable commitment fee of $2,500.00 in connection with the Committed
Revolving Line, payable on the Closing Date.

         (b) Non-usage Fee. No later than the 20th calendar day following the
end of each calendar quarter, Borrower shall pay to Bank a non-usage fee equal
to One Fourth of One Percent (0.25%) of the difference between the Committed
Revolving Line and the average daily outstanding balance during the prior
calendar quarter.

         (c) Bank Expenses. Borrower will pay to Bank all Bank Expenses
(including reasonable attorneys' fees and reasonable expenses), as defined in
this Agreement, incurred through and after the date of this Agreement, are
payable when due.

3        CONDITIONS OF LOANS

3.1      CONDITIONS PRECEDENT TO INITIAL CREDIT EXTENSION.

         Bank's obligation to make the initial Credit Extension is subject to
the condition precedent that it receive the agreements, documents and fees it
requires.

3.2      CONDITIONS PRECEDENT TO ALL CREDIT EXTENSIONS.

         Bank's obligations to make each Credit Extension, including the initial
Credit Extension, is subject to the following:

                                       2
<PAGE>

         (a) timely receipt of any Payment/Advance Form; and

         (b) the representations and warranties in Section 5 must be materially
true on the date of the Payment/Advance Form and on the effective date of each
Credit Extension and no Event of Default may have occurred and be continuing, or
result from the Credit Extension. Each Credit Extension is Borrower's
representation and warranty on that date that the representations and warranties
of Section 5 remain true.

4        CREATION OF SECURITY INTEREST

4.1      GRANT OF SECURITY INTEREST.

         Borrower grants Bank a continuing security interest in all presently
existing and later acquired Collateral to secure all Obligations and performance
of each of Borrower's duties under the Loan Documents. Except for Permitted
Liens, any security interest will be a first priority security interest in the
Collateral. Bank may place a "hold" on any deposit account pledged as
Collateral. If this Agreement is terminated, Bank's lien and security interest
in the Collateral will continue until Borrower fully satisfies its Obligations.

4.2      AUTHORIZATION TO FILE.

         Borrower authorizes Bank to file financing statements without notice to
Borrower, with all appropriate jurisdictions, as Bank deems appropriate, in
order to perfect or protect Bank's interest in the Collateral.

5        REPRESENTATIONS AND WARRANTIES

         Borrower represents and warrants as follows:

5.1      DUE ORGANIZATION AND AUTHORIZATION.

         Borrower and each Subsidiary is duly existing and in good standing in
its state of formation and qualified and licensed to do business in, and in good
standing in, any state in which the conduct of its business or its ownership of
property requires that it be qualified, except where the failure to do so could
not reasonably be expected to cause a Material Adverse Change.

         The execution, delivery and performance of the Loan Documents have been
duly authorized, and do not conflict with Borrower's formation documents, nor
constitute an event of default under any material agreement by which Borrower is
bound. Borrower is not in default under any agreement to which or by which it is
bound in which the default could reasonably be expected to cause a Material
Adverse Change.

5.2      COLLATERAL.

         Borrower has good title to the Collateral, free of Liens except
Permitted Liens. Borrower has no other deposit account, other than the deposit
accounts described in the Schedule. The Accounts are bona fide, existing
obligations, and the service or property has been performed or delivered to the
account debtor or its agent for immediate shipment to and unconditional
acceptance by the account debtor. The Collateral is not in the possession of any
third party bailee (such as at a warehouse). In the event that Borrower, after
the date hereof, intends to store or otherwise deliver the Collateral to such a
bailee, then Borrower will receive the prior written consent of Bank and such
bailee must acknowledge in writing that the bailee is holding such Collateral
for the benefit of Bank. Borrower has no notice of any actual or imminent
Insolvency Proceeding of any account debtor whose accounts are an Eligible
Account in any Borrowing Base Certificate. To the knowledge of Borrower,
Inventory is in all material respects of good and marketable quality, free from
material defects. Borrower is the sole owner of the Intellectual Property,
except for non-exclusive licenses granted to its customers in the ordinary
course of business. Each Patent is valid and enforceable and no part of the
Intellectual Property has been judged invalid or

                                       3
<PAGE>
unenforceable, in whole or in part, and no legal proceeding has been initiated
against Borrower claiming that any part of the Intellectual Property violates
the rights of any third party.

5.3      LITIGATION.

         Except as shown in the Schedule or in Borrower's reports filed with the
Securities and Exchange Commission, copies of which have been provided to Bank,
there are no actions or proceedings pending or, to the knowledge of Borrower's
Responsible Officers, threatened by or against Borrower or any Subsidiary in
which a likely adverse decision could reasonably be expected to cause a Material
Adverse Change.

5.4      NO MATERIAL ADVERSE CHANGE IN FINANCIAL STATEMENTS.

         All consolidated financial statements for Borrower, and any Subsidiary,
delivered to Bank fairly present in all material respects Borrower's
consolidated financial condition and Borrower's consolidated results of
operations. There has not been any material deterioration in Borrower's
consolidated financial condition since the date of the most recent financial
statements submitted to Bank.

5.5      SOLVENCY.

         Borrower is able to pay its debts (including trade debts) as they
become due.

5.6      REGULATORY COMPLIANCE.

         Borrower is not an "investment company" or a company "controlled" by an
"investment company" under the Investment Company Act. Borrower is not engaged
as one of its important activities in extending credit for margin stock (under
Regulations T and U of the Federal Reserve Board of Governors). Borrower has
complied in all material respects with the Federal Fair Labor Standards Act.
Borrower has not violated any laws, ordinances or rules, the violation of which
could reasonably be expected to cause a Material Adverse Change. None of
Borrower's or any Subsidiary's properties or assets has been used by Borrower or
any Subsidiary or, to the best of Borrower's knowledge, by previous Persons, in
disposing, producing, storing, treating, or transporting any hazardous substance
other than legally. Borrower and each Subsidiary has timely filed all required
tax returns and extensions and paid, or made adequate provision to pay, all
material taxes, except those being contested in good faith with adequate
reserves under GAAP. Borrower and each Subsidiary has obtained all consents,
approvals and authorizations of, made all declarations or filings with, and
given all notices to, all government authorities that are necessary to continue
its business as currently conducted, except where the failure to do so could not
reasonably be expected to cause a Material Adverse Change.

5.7      SUBSIDIARIES.

         Borrower does not own any stock, partnership interest or other equity
securities except for Permitted Investments.

5.8      FULL DISCLOSURE.

         No written representation, warranty or other statement of Borrower in
any certificate or written statement given to Bank (taken together with all such
written certificates and written statements to Bank) contains any untrue
statement of a material fact or omits to state a material fact necessary to make
the statements contained in the certificates or statements not misleading. It
being recognized by Bank that the projections and forecasts provided by Borrower
in good faith and based upon reasonable assumptions are not viewed as facts and
that actual results during the period or periods covered by such projections and
forecasts may differ and could differ from the projected and forecasted results.

                                       4
<PAGE>

6        AFFIRMATIVE COVENANTS

         Borrower will do all of the following for so long as Bank has an
obligation to lend, or there are outstanding Obligations:

6.1      GOVERNMENT COMPLIANCE.

         Borrower will maintain its and all Subsidiaries' legal existence and
good standing in its jurisdiction of formation and maintain qualification in
each jurisdiction in which the failure to so qualify would reasonably be
expected to cause a material adverse effect on Borrower's business or
operations. Borrower will comply, and have each Subsidiary comply, with all
laws, ordinances and regulations to which it is subject, noncompliance with
which could have a material adverse effect on Borrower's business or operations
or would reasonably be expected to cause a Material Adverse Change.

6.2      FINANCIAL STATEMENTS, REPORTS, CERTIFICATES.

         (a) Borrower will deliver to Bank: (i) within 5 days of filing with the
Securities and Exchange Commission, but no later than 90 days after the end of
Borrower's fiscal year, an annual report on Form 10-K together with an
unqualified opinion on the financial statements (ii) within 5 days of filing,
but no later than 45 days after the end of each of Borrower's first three
quarters of each fiscal year, copies of all reports on Form 10-Q filed with the
Securities and Exchange Commission, (iii) within 5 days of filing, copies of all
statements, reports and notices made available to Borrower's security holders or
to any holders of Subordinated Debt and all reports on Form 8-K, filed with the
Securities and Exchange Commission; (iv) a prompt report of any legal actions
pending or threatened against Borrower or any Subsidiary that could result in
damages or costs to Borrower or any Subsidiary of $500,000 or more; (v) prompt
notice of any material change in the composition of the Intellectual Property or
knowledge of an event that materially adversely affects the value of the
Intellectual Property; and (vi) budgets, sales projections, operating plans or
other financial information Bank requests.

         (b) Within 30 days after the last day of each month if during such
month the aggregate amount of all Credit Extensions outstanding at any time
during such month exceed $10,000,000, Borrower will deliver to Bank a Borrowing
Base Certificate signed by a Responsible Officer in the form of EXHIBIT C, with
aged listings of accounts receivable and accounts payable.

         (c) With the quarterly reports on Form 10-Q as required by this Section
6.2, Borrower will deliver to Bank a Compliance Certificate signed by a
Responsible Officer in the form of EXHIBIT D.

         (d) At any time that the aggregate amount of outstanding Credit
Extensions, exclusive of interest thereon, exceeds $10,000,000 and remains
outstanding for 30 consecutive days, Borrower will allow Bank to conduct and
initial audit Borrower's Collateral at Borrower's expense. Such audits will be
conducted no more often than once every year after the initial audit, unless an
Event of Default has occurred and is continuing.

6.3      INVENTORY; RETURNS.

         Borrower will keep all Inventory, if any, in good and marketable
condition, free from material defects. Returns and allowances between Borrower
and its account debtors will follow Borrower's customary practices as they exist
at execution of this Agreement. Borrower must promptly notify Bank of all
returns, recoveries, disputes and claims that involve more than 10% of
Borrower's gross sales for any month.

6.4      TAXES.

         Borrower will make, and cause each Subsidiary to make, timely payment
of all material federal, state, and local taxes or assessments (other than taxes
and assessments which Borrower is contesting in good faith, with adequate
reserves maintained in accordance with GAAP) and will deliver to Bank, on
demand, appropriate certificates attesting to the payment.

                                       5
<PAGE>

6.5      INSURANCE.

         Borrower will keep its business and the Collateral insured for risks
and in amounts standard for Borrower's industry, and as Bank may reasonably
request. Insurance policies will be in a form, with companies, and in amounts
that are reasonably satisfactory to Bank in Bank's reasonable discretion. All
property policies will have a lender's loss payable endorsement showing Bank as
an additional loss payee and all liability policies will show the Bank as an
additional insured and provide that the insurer must give Bank at least 20 days
notice before canceling its policy. At Bank's request, Borrower will deliver
certified copies of policies and evidence of all premium payments. Proceeds
payable under any policy will, at Bank's option, be payable to Bank on account
of the Obligations.

6.6      PRIMARY ACCOUNTS.

         Borrower will maintain its primary depository and operating accounts
with Bank.

6.7      FINANCIAL COVENANTS.

         Borrower will maintain on a consolidated basis as of the last day of
each fiscal quarter of Borrower unless otherwise noted:

         (i) QUICK RATIO. A ratio of Quick Assets to Current Liabilities of at
         least 2.00 to 1.0.

         (ii) TANGIBLE NET WORTH. A Tangible Net Worth plus Subordinated Debt of
         at least the sum of $100,000,000 plus 50% of the net profit for such
         quarter.

         (iii) PROFITABILITY/(LOSS). A minimum net profit (and maximum net loss)
         calculated as earnings before depreciation, amortization and other
         one-time, non-cash charges, on a per share basis and measured on a
         rolling 6-month basis as follows: as of 3/31/02: ($1.00); as of
         6/30/02: ($0.75): as of 9/30/02: ($0.34); and as of 12/31/02 and
         thereafter: $0.01.

6.8      REGISTRATION OF INTELLECTUAL PROPERTY RIGHTS.

         At such time as Borrower determines that it is appropriate to do so,
Borrower will register with the United States Patent and Trademark Office or the
United States Copyright Office Borrower's Intellectual Property that is
determined by Borrower to be material to Borrower's business and additional
Intellectual Property rights developed or acquired including significant
revisions or additions to or with any product before the sale or licensing of
the product to any third party.

         Borrower will (i) protect, defend and maintain the validity and
enforceability of Borrower's Intellectual Property and promptly advise Bank in
writing of any legal proceeding against Borrower for material infringements and
(ii) not allow any Intellectual Property that is determined by Borrower to be
material to Borrower's business to be abandoned, forfeited or dedicated to the
public without Bank's written consent, which consent shall not be unreasonably
withheld.

6.9      FURTHER ASSURANCES.

         Borrower will execute any further instruments and take further action
as Bank reasonably requests to perfect or continue Bank's security interest in
the Collateral or to effect the purposes of this Agreement.

                                       6
<PAGE>

7        NEGATIVE COVENANTS

         Borrower will not do any of the following without Bank's prior written
consent, which will not be unreasonably withheld, for so long as Bank has an
obligation to lend or there are any outstanding Obligations:

7.1      DISPOSITIONS.

         Convey, sell, lease, transfer or otherwise dispose of (collectively a
"Transfer"), or permit any of its Subsidiaries to Transfer, all or any part of
its business or property, except for Transfers (i) of Inventory in the ordinary
course of business; (ii) of non-exclusive licenses and similar arrangements for
the use of the property of Borrower or its Subsidiaries in the ordinary course
of business; (iii) of worn-out, damaged, or obsolete Equipment; or (iv) other
Transfers which constitute liquidation of Investments as permitted in Section
7.6(i).

7.2      CHANGES IN BUSINESS, OWNERSHIP, MANAGEMENT OR BUSINESS LOCATIONS.

         Engage in or permit any of its Subsidiaries to engage in any business
other than the businesses currently engaged in by Borrower or reasonably related
thereto or have a material change in its ownership of greater than 25% (other
than by the sale of Borrower's equity securities in a public offering) or have a
change in its management. Borrower will not, without at least 30 days prior
written notice, relocate its chief executive office or add any new offices or
business locations in which Borrower maintains or stores over $25,000 in
Borrower's assets or property.

7.3      MERGERS OR ACQUISITIONS.

         Merge or consolidate, or permit any of its Subsidiaries to merge or
consolidate, with any other Person, or acquire, or permit any of its
Subsidiaries to acquire, all or substantially all of the capital stock or
property of another Person, except a Permitted Acquisition where no Event of
Default has occurred and is continuing or would exist after giving effect to
such Permitted Acquisition. Bank shall respond to Borrower's request for consent
to any transaction contemplated by this Section 7.3 other than a Permitted
Acquisition within 10 days of the receipt of a written request for such consent,
which request shall be accompanied by such materials as are reasonably requested
by Bank for the purpose of making a decision regarding such consent. A
Subsidiary may merge or consolidate into another Subsidiary or into Borrower.

7.4      INDEBTEDNESS.

         Create, incur, assume, or be liable for any Indebtedness, or permit any
Subsidiary to do so, other than Permitted Indebtedness.

7.5      ENCUMBRANCE.

         Create, incur, or allow any Lien on any of its property, particularly
any of its Intellectual Property, or assign or convey any right to receive
income, including the sale of any Accounts, or permit any of its Subsidiaries to
do so, except for Permitted Liens, or permit any Collateral not to be subject to
the first priority security interest granted hereby, subject to Permitted Liens.

7.6      DISTRIBUTIONS; INVESTMENTS.

         (i) Directly or indirectly acquire or own any Person, or make any
Investment in any Person, other than Permitted Investments, or permit any of its
Subsidiaries to do so; (ii) pay any dividends or make any distribution or
payment or redeem, retire or purchase any capital stock; or (iii) make any loans
or other extensions of credit, other than trade accounts created in the ordinary
course of business and in customary amounts consistent with Borrower's past
practices, or permit any of its Subsidiaries to do so.

                                       7
<PAGE>

7.7      TRANSACTIONS WITH AFFILIATES.

         Directly or indirectly enter into or permit to exist any material
transaction with any Affiliate of Borrower except for transactions that are in
the ordinary course of Borrower's business, upon fair and reasonable terms that
are no less favorable to Borrower than would be obtained in an arm's length
transaction with a nonaffiliated Person.

7.8      SUBORDINATED DEBT.

         Make or permit any payment on any Subordinated Debt, except under the
terms of the Subordinated Debt, or amend any provision in any document relating
to the Subordinated Debt without Bank's prior written consent.

7.9      COMPLIANCE.

         Become an "investment company" or a company controlled by an
"investment company," under the Investment Company Act of 1940 or undertake as
one of its important activities extending credit to purchase or carry margin
stock, or use the proceeds of any Advance for that purpose; fail to meet the
minimum funding requirements of ERISA, permit a Reportable Event or Prohibited
Transaction, as defined in ERISA, to occur; fail to comply with the Federal Fair
Labor Standards Act or violate any other law or regulation, if the violation
could reasonably be expected to have a material adverse effect on Borrower's
business or operations or would reasonably be expected to cause a Material
Adverse Change, or permit any of its Subsidiaries to do so.

8        EVENTS OF DEFAULT

         Any one of the following is an Event of Default:

8.1      PAYMENT DEFAULT.

         If Borrower fails to pay any of the Obligations within 5 days after
their due date. During any such 5 day period the failure to cure the default is
not an Event of Default (but no Credit Extension will be made during the cure
period);

8.2      COVENANT DEFAULT.

         If Borrower does not perform any obligation in Section 6 or violates
any covenant in Section 7 or does not perform or observe any other material
term, condition or covenant in this Agreement, any Loan Documents, or in any
agreement between Borrower and Bank and as to any default under a term,
condition or covenant that can be cured, has not cured the default within 20
days after it occurs, or if the default cannot be cured within 20 days or cannot
be cured after Borrower's attempts within the 20 day period, and the default may
be cured within a reasonable time, then Borrower has an additional period (of
not more than 30 days) to attempt to cure the default. During the additional
time, the failure to cure the default is not an Event of Default (but no Credit
Extensions will be made during the cure period);

8.3      MATERIAL ADVERSE CHANGE.

         If there (i) occurs a material adverse change in the business,
operations, or condition (financial or otherwise) of the Borrower, or (ii) is a
material impairment of the prospect of repayment of any portion of the
Obligations, or (iii) is a material impairment of the value of the Collateral or
a negative change in the priority of Bank's security interests in the
Collateral; and the occurrence of any one of which shall, for purposes of this
Agreement, constitute a "Material Adverse Change";

                                       8
<PAGE>

8.4      ATTACHMENT.

         (i) If any material portion of Borrower's assets is attached, seized,
levied on, or comes into possession of a trustee or receiver and the attachment,
seizure or levy is not removed in 30 days, or (ii) if Borrower is enjoined,
restrained, or prevented by court order from conducting a material part of its
business, or (iii) if a judgment or other claim becomes a Lien on a material
portion of Borrower's assets, or (iv) if a notice of lien, levy, or assessment
is filed against any of Borrower's assets by any government agency and not paid
within 30 days after Borrower receives notice. These are not Events of Default
if stayed or if a bond is posted pending contest by Borrower (but no Credit
Extensions will be made during the cure period);

8.5      INSOLVENCY.

         (i) If Borrower becomes insolvent or (ii) if Borrower begins an
Insolvency Proceeding or (iii) an Insolvency Proceeding is begun against
Borrower and not dismissed or stayed within 30 days (but no Credit Extensions
will be made before any Insolvency Proceeding is dismissed);

8.6      OTHER AGREEMENTS.

         If there is a default in any agreement between Borrower and a third
party that gives the third party the right to accelerate any Indebtedness
exceeding $500,000 or that could cause a Material Adverse Change;

8.7      JUDGMENTS.

         If a money judgment(s) in the aggregate of at least $500,000 is
rendered against Borrower and is unsatisfied and unstayed for 30 days (but no
Credit Extensions will be made before the judgment is stayed or satisfied); or

8.8      MISREPRESENTATIONS.

         If Borrower or any Person acting for Borrower makes any material
misrepresentation or material misstatement now or later in any warranty or
representation in this Agreement or in any writing delivered to Bank or to
induce Bank to enter this Agreement or any Loan Document.

9        BANK'S RIGHTS AND REMEDIES

9.1      RIGHTS AND REMEDIES.

         When an Event of Default occurs and continues Bank may, without notice
or demand, do any or all of the following:

         (a) Declare all Obligations immediately due and payable (but if an
Event of Default described in Section 8.5 occurs all Obligations are immediately
due and payable without any action by Bank);

         (b) Stop advancing money or extending credit for Borrower's benefit
under this Agreement or under any other agreement between Borrower and Bank;

         (c) Settle or adjust disputes and claims directly with account debtors
for amounts, on terms and in any order that Bank considers advisable;

         (d) Make any payments and do any acts it considers necessary or
reasonable to protect its security interest in the Collateral. Borrower will
assemble the Collateral if Bank requires and make it available as Bank
designates. Bank may enter premises where the Collateral is located, take and
maintain possession of any part of the Collateral, and pay, purchase, contest,
or compromise any Lien which appears to be prior or superior to its security
interest and pay all expenses incurred. Borrower

                                       9
<PAGE>

grants Bank a license to enter and occupy any of its premises, without charge,
to exercise any of Bank's rights or remedies;

         (e) Apply to the Obligations any (i) balances and deposits of Borrower
it holds, or (ii) any amount held by Bank owing to or for the credit or the
account of Borrower;

         (f) Ship, reclaim, recover, store, finish, maintain, repair, prepare
for sale, advertise for sale, and sell the Collateral. Bank is granted a
non-exclusive, royalty-free license or other right to use, without charge,
Borrower's labels, Patents, Copyrights, Mask Works, rights of use of any name,
trade secrets, trade names, Trademarks, service marks, and advertising matter,
or any similar property as it pertains to the Collateral, in completing
production of, advertising for sale, and selling any Collateral and, in
connection with Bank's exercise of its rights under this Section, Borrower's
rights under all licenses and all franchise agreements inure to Bank's benefit;
and

         (g) Dispose of the Collateral according to the Code.

9.2      POWER OF ATTORNEY.

         Effective only when an Event of Default occurs and continues, Borrower
irrevocably appoints Bank as its lawful attorney to: (i) endorse Borrower's name
on any checks or other forms of payment or security; (ii) sign Borrower's name
on any invoice or bill of lading for any Account or drafts against account
debtors, (iii) make, settle, and adjust all claims under Borrower's insurance
policies; (iv) settle and adjust disputes and claims about the Accounts directly
with account debtors, for amounts and on terms Bank determines reasonable; and
(v) transfer the Collateral into the name of Bank or a third party as the Code
permits. Bank may exercise the power of attorney to sign Borrower's name on any
documents necessary to perfect or continue the perfection of any security
interest regardless of whether an Event of Default has occurred. Bank's
appointment as Borrower's attorney in fact, and all of Bank's rights and powers,
coupled with an interest, are irrevocable until all Obligations have been fully
repaid and performed and Bank's obligation to provide Credit Extensions
terminates.

9.3      ACCOUNTS COLLECTION.

         When an Event of Default occurs and continues, Bank may notify any
Person owing Borrower money of Bank's security interest in the funds and verify
the amount of the Account. Borrower must collect all payments in trust for Bank
and, if requested by Bank, immediately deliver the payments to Bank in the form
received from the account debtor, with proper endorsements for deposit.

9.4      BANK EXPENSES.

         If Borrower fails to pay any amount or furnish any required proof of
payment to third persons, Bank may make all or part of the payment or obtain
insurance policies required in Section 6.5, and take any action under the
policies Bank deems prudent. Any amounts paid by Bank are Bank Expenses and
immediately due and payable, bearing interest at the then applicable rate and
secured by the Collateral. No payments by Bank are deemed an agreement to make
similar payments in the future or Bank's waiver of any Event of Default.

9.5      BANK'S LIABILITY FOR COLLATERAL.

         If Bank complies with reasonable banking practices and the Code, it is
not liable for: (a) the safekeeping of the Collateral; (b) any loss or damage to
the Collateral; (c) any diminution in the value of the Collateral; or (d) any
act or default of any carrier, warehouseman, bailee, or other person. Borrower
bears all risk of loss, damage or destruction of the Collateral.

9.6      REMEDIES CUMULATIVE.

         Bank's rights and remedies under this Agreement, the Loan Documents,
and all other agreements are cumulative. Bank has all rights and remedies
provided under the Code, by law, or in

                                       10
<PAGE>

equity. Bank's exercise of one right or remedy is not an election, and Bank's
waiver of any Event of Default is not a continuing waiver. Bank's delay is not a
waiver, election, or acquiescence. No waiver is effective unless signed by Bank
and then is only effective for the specific instance and purpose for which it
was given.

9.7      DEMAND WAIVER.

         Borrower waives demand, notice of default or dishonor, notice of
payment and nonpayment, notice of any default, nonpayment at maturity, release,
compromise, settlement, extension, or renewal of accounts, documents,
instruments, chattel paper, and guarantees held by Bank on which Borrower is
liable.

10       NOTICES

         All notices or demands by any party about this Agreement or any other
related agreement must be in writing and be personally delivered or sent by an
overnight delivery service, by certified mail, postage prepaid, return receipt
requested, or by telefacsimile to the addresses set forth at the beginning of
this Agreement. A party may change its notice address by giving the other party
written notice.

11       CHOICE OF LAW, VENUE

         Colorado law governs the Loan Documents without regard to principles of
conflicts of law. Borrower and Bank each submit to the exclusive jurisdiction of
the State and Federal courts in the City and County of Denver, Colorado.

12       GENERAL PROVISIONS

12.1     SUCCESSORS AND ASSIGNS.

         This Agreement binds and is for the benefit of the successors and
permitted assigns of each party. Borrower may not assign this Agreement or any
rights under it without Bank's prior written consent which may be granted or
withheld in Bank's discretion. Bank has the right, without the consent of or
notice to Borrower, to sell, transfer, negotiate, or grant participation in all
or any part of, or any interest in, Bank's obligations, rights and benefits
under this Agreement.

12.2     INDEMNIFICATION.

         Borrower will indemnify, defend and hold harmless Bank and its
officers, employees, and agents against: (a) all obligations, demands, claims,
and liabilities asserted by any other party in connection with the transactions
contemplated by the Loan Documents; and (b) all losses or Bank Expenses
incurred, or paid by Bank from, following, or consequential to transactions
between Bank and Borrower (including reasonable attorneys fees and expenses),
except for losses caused by Bank's gross negligence or willful misconduct.

12.3     TIME OF ESSENCE.

         Time is of the essence for the performance of all obligations in this
Agreement.

12.4     SEVERABILITY OF PROVISION.

         Each provision of this Agreement is severable from every other
provision in determining the enforceability of any provision.

12.5     AMENDMENTS IN WRITING, INTEGRATION.

         All amendments to this Agreement must be in writing and signed by
Borrower and Bank. This Agreement represents the entire agreement about this
subject matter, and supersedes prior or

                                       11
<PAGE>

contemporaneous negotiations or agreements. All prior or contemporaneous
agreements, understandings, representations, warranties, and negotiations
between the parties about the subject matter of this Agreement and the Loan
Documents merge into this Agreement and the Loan Documents.

12.6     COUNTERPARTS.

         This Agreement may be executed in any number of counterparts and by
different parties on separate counterparts, each of which, when executed and
delivered, are an original, and all taken together, constitute one Agreement.

12.7     SURVIVAL.

         All covenants, representations and warranties made in this Agreement
continue in full force while any Obligations remain outstanding. The obligations
of Borrower in Section 12.2 to indemnify Bank will survive until all statutes of
limitations for actions that may be brought against Bank have run.

12.8     CONFIDENTIALITY.

         In handling any confidential information, Bank will exercise the same
degree of care that it exercises for its own proprietary information, but
disclosure of information may be made (i) to Bank's subsidiaries or affiliates
in connection with their business with Borrower, (ii) to prospective transferees
or purchasers of any interest in the loans (provided, however, Bank shall use
commercially reasonable efforts in obtaining such prospective transferee or
purchasers agreement of the terms of this provision), (iii) as required by law,
regulation, subpoena, or other order, (iv) as required in connection with Bank's
examination or audit and (v) as Bank considers appropriate exercising remedies
under this Agreement. Confidential information does not include information that
either: (a) is in the public domain or in Bank's possession when disclosed to
Bank, or becomes part of the public domain after disclosure to Bank; or (b) is
disclosed to Bank by a third party, if Bank does not know that the third party
is prohibited from disclosing the information.

12.9     ATTORNEYS' FEES, COSTS AND EXPENSES.

         In any action or proceeding between Borrower and Bank arising out of
the Loan Documents, the prevailing party will be awarded its reasonable
attorneys' fees and other reasonable costs and expenses incurred, in addition to
any other relief to which it may be entitled.

13       DEFINITIONS

13.1     DEFINITIONS.

         In this Agreement:

         "ACCOUNTS" are all existing and later arising accounts, contract
rights, and other obligations owed Borrower in connection with its sale or lease
of goods (including licensing software and other technology) or provision of
services, all credit insurance, guaranties, other security and all merchandise
returned or reclaimed by Borrower and Borrower's Books relating to any of the
foregoing.

         "ADVANCE" or "ADVANCES" is a loan advance (or advances) made in U.S.
Dollars under the Committed Revolving Line.

         "AEI JAPAN" is Advanced Energy Japan K.K. Ltd.

         "AFFILIATE" of a Person is a Person that owns or controls directly or
indirectly the Person, any Person that controls or is controlled by or is under
common control with the Person, and each of that Person's senior executive
officers, directors, partners and, for any Person that is a limited liability
company, that Person's managers and members.

                                       12
<PAGE>

         "BANK EXPENSES" are all audit fees and expenses and reasonable costs
and expenses (including reasonable attorneys' fees and expenses) for preparing,
negotiating, administering, defending and enforcing the Loan Documents
(including appeals or Insolvency Proceedings).

         "BORROWER'S BOOKS" are all Borrower's books and records including
ledgers, records regarding Borrower's assets or liabilities, the Collateral,
business operations or financial condition and all computer programs or discs or
any equipment containing the information.

         "BORROWING BASE" is (i) 80% of Eligible Accounts plus (ii) the lesser
of 20% of the value of Borrower's Eligible Inventory (valued at the lower of
cost or wholesale fair market value) or $5,000,000, as determined by Bank from
Borrower's most recent Borrowing Base Certificate.

         "BUSINESS DAY" is any day that is not a Saturday, Sunday or a day on
which the Bank is closed.

         "CASH ACQUISITION" is any acquisition by the Borrower of the assets or
capital stock of another entity, the consideration for which consists solely of
cash and/or marketable securities.

         "CASH MANAGEMENT SERVICES" are defined in Section 2.1.3.

         "CLOSING DATE" is the date of this Agreement.

         "CODE" is the Uniform Commercial Code, as applicable.

         "COLLATERAL" is the property described on EXHIBIT A.

         "COMMITTED REVOLVING LINE" is a Credit Extension of up to $25,000,000.

         "CONTINGENT OBLIGATION" is, for any Person, any direct or indirect
liability, contingent or not, of that Person for (i) any indebtedness, lease,
dividend, letter of credit or other obligation of another such as an obligation
directly or indirectly guaranteed, endorsed, co-made, discounted or sold with
recourse by that Person, or for which that Person is directly or indirectly
liable; (ii) any obligations for undrawn letters of credit for the account of
that Person; and (iii) all obligations from any interest rate, currency or
commodity swap agreement, interest rate cap or collar agreement, or other
agreement or arrangement designated to protect a Person against fluctuation in
interest rates, currency exchange rates or commodity prices; but "Contingent
Obligation" does not include endorsements in the ordinary course of business.
The amount of a Contingent Obligation is the stated or determined amount of the
primary obligation for which the Contingent Obligation is made or, if not
determinable, the maximum reasonably anticipated liability for it determined by
the Person in good faith; but the amount may not exceed the maximum of the
obligations under the guarantee or other support arrangement.

         "COPYRIGHTS" are all copyright rights, applications or registrations
and like protections in each work or authorship or derivative work, whether
published or not (whether or not it is a trade secret) now or later existing,
created, acquired or held.

         "CREDIT EXTENSION" is each Advance, FX Forward Contract or any other
extension of credit by Bank for Borrower's benefit.

         "CURRENT ASSETS" are amounts that under GAAP should be included on that
date as current assets on Borrower's consolidated balance sheet.

         "CURRENT LIABILITIES" are the aggregate amount of Borrower's Total
Liabilities which mature within one (1) year.

         "ELIGIBLE ACCOUNTS" are Accounts in the ordinary course of Borrower's
business that meet all Borrower's representations and warranties in Section 5;
but Bank may change eligibility standards by

                                       13
<PAGE>

giving Borrower 30 days prior notice. Unless Bank agrees otherwise in writing,
Eligible Accounts will not include:

         (a) Accounts that the account debtor has not paid within 90 days of
         invoice date;

         (b) Accounts for an account debtor, 50% or more of whose Accounts have
         not been paid within 90 days of invoice date;

         (c) Credit balances over 90 days from invoice date;

         (d) Accounts for an account debtor, including Affiliates, whose total
         obligations to Borrower exceed 25% of all Accounts, unless Bank
         approves in writing in advance;

         (e) Accounts for which the account debtor does not have its principal
         place of business in the United States, unless approved by Bank on a
         case by case basis;

         (f) Accounts for which the account debtor is a federal, state or local
         government entity or any department, agency, or instrumentality of any
         such entity;

         (g) Accounts for which Borrower owes the account debtor, but only up to
         the amount owed (sometimes called "contra" accounts, accounts payable,
         customer deposits or credit accounts);

         (h) Accounts for demonstration or promotional equipment, or in which
         goods are consigned, sales guaranteed, sale or return, sale on
         approval, bill and hold, retainage, or other terms if account debtor's
         payment may be conditional;

         (i) Accounts for which the account debtor is Borrower's Affiliate,
         officer, employee, or agent;

         (j) Accounts in which the account debtor disputes liability or makes
         any claim and Bank reasonably believes there may be a basis for dispute
         (but only up to the disputed or claimed amount), or if the Account
         Debtor is subject to an Insolvency Proceeding, or becomes insolvent, or
         goes out of business;

         (k) Accounts for which Bank reasonably determines collection to be
         doubtful; and

         (l) Accounts owed to AEI Japan as long as such Accounts are subject to
         Liens in favor of other financial institutions.

         "ELIGIBLE INVENTORY" is Borrower's Inventory, including raw materials,
located at its principal place of business (or any location permitted under
Section 7.2) that is in all material respects of good and marketable quality,
free from material defects, but does not include used, returned, obsolete,
consigned, work in progress, demonstrative or custom inventory, supplies,
packing or shipping materials.

         "EQUIPMENT" is all present and future machinery, equipment, tenant
improvements, furniture, fixtures, vehicles, tools, parts and attachments in
which Borrower has any interest.

         "ERISA" is the Employment Retirement Income Security Act of 1974, and
its regulations.

         "FX FORWARD CONTRACT" is defined in Section 2.1.2.

         "FX RESERVE" is defined in Section 2.1.2.

         "GAAP" is generally accepted accounting principles.

         "INDEBTEDNESS" is (a) indebtedness for borrowed money or the deferred
price of property or services, such as reimbursement and other obligations for
surety bonds and letters of credit,

                                       14
<PAGE>
(b) obligations evidenced by notes, bonds, debentures or similar instruments,
(c) capital lease obligations and (d) Contingent Obligations.

         "INSOLVENCY PROCEEDING" is a proceeding by or against any Person under
the United States Bankruptcy Code, or any other bankruptcy or insolvency law,
including assignments for the benefit of creditors, compositions, extensions
generally with its creditors, or proceedings seeking reorganization,
arrangement, or other relief.

         "INTELLECTUAL PROPERTY" is:

         (a) Copyrights (whether published of not), Trademarks, Patents, and
Mask Works including amendments, renewals, extensions, and all licenses or other
rights to use and all license fees and royalties from the use;

         (b) Any trade secrets and any intellectual property rights in computer
software and computer software products now or later existing, created, acquired
or held;

         (c) All design rights which may be available to Borrower now or later
created, acquired or held;

         (d) Any claims for damages (past, present or future) for infringement
of any of the rights above, with the right, but not the obligation, to sue and
collect damages for use or infringement of the intellectual property rights
above; and

         All proceeds and products of the foregoing, including all insurance,
indemnity or warranty payments.

         "INVENTORY" is present and future inventory in which Borrower has any
interest, including merchandise, raw materials, parts, supplies, packing and
shipping materials, work in process of a tangible nature and finished products
intended for sale or lease or to be furnished under a contract of service, of
every kind and description now or later owned by or in the custody or
possession, actual or constructive, of Borrower, including inventory temporarily
out of its custody or possession or in transit and including returns on any
accounts or other proceeds (including insurance proceeds) from the sale or
disposition of any of the foregoing and any documents of title.

         "INVESTMENT" is any beneficial ownership of (including stock,
partnership interest or other securities) any Person, or any loan, advance or
capital contribution to any Person.

         "LIEN" is a mortgage, lien, deed of trust, charge, pledge, security
interest or other encumbrance.

         "LOAN DOCUMENTS" are, collectively, this Agreement, any note, or notes
or guaranties executed by Borrower, and any other present or future agreement
between Borrower and/or for the benefit of Bank in connection with this
Agreement, all as amended, extended or restated.

         "MASK WORKS" are all mask works or similar rights available for the
protection of semiconductor chips, now owned or later acquired.

         "MATERIAL ADVERSE CHANGE" is described in Section 8.3.

         "MATURITY DATE" is the Revolving Maturity Date.

         "OBLIGATIONS" are debts, principal, interest, Bank Expenses and other
amounts Borrower owes Bank now or later, including cash management services,
letters of credit and foreign exchange contracts, if any and including interest
accruing after Insolvency Proceedings begin and debts, liabilities, or
obligations of Borrower assigned to Bank.

         "PATENTS" are patents, patent applications and like protections,
including improvements, divisions, continuations, renewals, reissues, extensions
and continuations-in-part of the same.

                                       15
<PAGE>

         "PERMITTED ACQUISITION" is (i) any Cash Acquisition in which the
aggregate consideration paid, directly or indirectly, by the Borrower does not
exceed the lesser of 15% of Borrower's Tangible Net Worth or 50% of Borrower's
aggregate cash and marketable securities immediately prior to such Cash
Acquisition, or (ii) any Stock Acquisition that does not result in a change in
ownership of more than 25% of the aggregate voting control of the Borrower
outstanding immediately prior to such Stock Acquisition and the consideration
paid, directly or indirectly, will not in the aggregate exceed 50% of Borrower's
Tangible Net Worth, or (iii) any transaction consisting in part of a Stock
Acquisition and in part of a Cash Acquisition, provided that each such portion
does not exceed a pro rata portion of the applicable threshold set forth in the
preceding clauses (i) and (ii) as is equal to the percentage of the aggregate
consideration paid in such transaction.

         "PERMITTED INDEBTEDNESS" is:

         (a) Borrower's indebtedness to Bank under this Agreement or any other
Loan Document;

         (b) Indebtedness existing on the Closing Date and shown on the
Schedule;

         (c) Subordinated Debt;

         (d) Indebtedness to trade creditors and with respect to surety bonds
and similar obligations incurred in the ordinary course of business;

         (e) Indebtedness secured by Permitted Liens;

         (f) Indebtedness in the form of convertible notes (similar to those due
September 4, 2004 and November 15, 2006) or other debt securities up to an
aggregate principal amount not exceeding 25% of Borrower's Tangible Net Worth;
and

         (g) Indebtedness of AEI Japan up to an aggregate principal amount of
$36,093,000.

         "PERMITTED INVESTMENTS" are:

         (a) Investments shown on the Schedule and existing on the Closing Date;

         (b) (i) marketable direct obligations issued or unconditionally
guaranteed by the United States or its agency or any State maturing within 1
year from its acquisition, (ii) commercial paper maturing no more than 1 year
after its creation and having the highest rating from either Standard & Poor's
Corporation or Moody's Investors Service, Inc., and (iii) Bank's certificates of
deposit issued maturing no more than 1 year after issue;

         (c) Investments accepted in connection with Transfers permitted by
Section 7.1; and

         (d) Investments of Subsidiaries in or to other Subsidiaries or Borrower
and Investments by Borrower in Subsidiaries not to exceed $32,000,000, of which
no more than $2,000,000 (less any distributions by way of loans or advances to
AEI Japan) shall be invested in AEI Japan, no more than $10,000,000 shall be
invested in AE Voorhees and Tower Energy, taken together, and no more than
$10,000,000 shall be invested in all other Subsidiaries other than AE Voorhees
and Tower Energy and AEI Japan, or their respective successors-in-interest, in
the aggregate in any fiscal year in each case;

         "PERMITTED LIENS" are:

         (a) Liens existing on the Closing Date and shown on the Schedule or
arising under this Agreement or other Loan Documents;

                                       16
<PAGE>

         (b) Liens for taxes, fees, assessments or other government charges or
levies, either not delinquent or being contested in good faith and for which
Borrower maintains adequate reserves on its Books, if they have no priority over
any of Bank's security interests;

         (c) Purchase money Liens (i) on Equipment acquired or held by Borrower
or its Subsidiaries incurred for financing the acquisition of the Equipment, or
(ii) existing on equipment when acquired, if the Lien is confined to the
property and improvements and the proceeds of the equipment;

         (d) Leases or subleases and licenses or sublicenses granted in the
ordinary course of Borrower's business, if the leases, subleases, licenses and
sublicenses permit granting Bank a security interest;

         (d) Liens incurred in the extension, renewal or refinancing of the
indebtedness secured by Liens described in (a) through (c), but any extension,
renewal or replacement Lien must be limited to the property encumbered by the
existing Lien and the principal amount of the indebtedness may not increase; and

         (e) Liens on assets of AEI Japan granted or assumed in connection with
the acquisition of Aera Japan Ltd. by AEI Japan.

         "PERSON" is any individual, sole proprietorship, partnership, limited
liability company, joint venture, company association, trust, unincorporated
organization, association, corporation, institution, public benefit corporation,
firm, joint stock company, estate, entity or government agency.

         "PRIME RATE" is Bank's most recently announced "prime rate," even if it
is not Bank's lowest rate.

         "QUICK ASSETS" is, on any date, the Borrower's consolidated,
unrestricted cash, cash equivalents, net billed accounts receivable and
investments with maturities of less than 12 months determined according to GAAP.

         "RESPONSIBLE OFFICER" is each of the Chief Executive Officer, the
President, the Chief Financial Officer and the, Controller of Borrower.

         "REVOLVING MATURITY DATE" is May __, 2003, the date 364 days from the
date of this Agreement.

         "SCHEDULE" is any attached schedule of exceptions.

         "STOCK ACQUISITION" is any acquisition by the Borrower of the assets or
capital stock of another entity, the consideration for which consists solely of
capital stock of the Borrower.

         "SUBORDINATED DEBT" is debt incurred by Borrower subordinated to
Borrower's indebtedness owed to Bank and which is reflected in a written
agreement in a manner and form acceptable to Bank and approved by Bank in
writing.

         "SUBSIDIARY" is for any Person, or any other business entity of which
more than 50% of the voting stock or other equity interests is owned or
controlled, directly or indirectly, by the Person or one or more Affiliates of
the Person.

         "TANGIBLE NET WORTH" is, on any date, the consolidated total assets of
Borrower and its Subsidiaries minus, (i) any amounts attributable to (a)
goodwill, (b) intangible items such as unamortized debt discount and expense,
Patents, trade and service marks and names, Copyrights and research and
development expenses except prepaid expenses, and (c) reserves not already
deducted from assets, and minus (ii) Total Liabilities; plus Subordinated Debt.

         "TOTAL LIABILITIES" is on any day, obligations that should, under GAAP,
be classified as liabilities on Borrower's consolidated balance sheet, including
all Indebtedness, and the current portion of Subordinated Debt allowed to be
paid, but excluding all other Subordinated Debt.

                                       17
<PAGE>

         "TRADEMARKS" are trademark and servicemark rights, registered or not,
applications to register and registrations and like protections, and the entire
goodwill of the business of Assignor connected with the trademarks.

BORROWER AND BANK EACH WAIVE THEIR RIGHT TO A JURY TRIAL OF ANY CLAIM OR CAUSE
OF ACTION ARISING OUT OF OR BASED UPON THIS AGREEMENT, ANY OTHER LOAN DOCUMENT
OR ANY CONTEMPLATED TRANSACTION, INCLUDING CONTRACT, TORT, BREACH OF DUTY AND
ALL OTHER CLAIMS. THIS WAIVER IS A MATERIAL INDUCEMENT FOR BOTH PARTIES TO ENTER
INTO THIS AGREEMENT. EACH PARTY HAS REVIEWED THIS WAIVER WITH ITS COUNSEL.

BORROWER:

ADVANCED ENERGY INDUSTRIES, INC.

By:
   --------------------------------

Title:
      -----------------------------

BANK:

SILICON VALLEY BANK

By:
   --------------------------------

Title:
      -----------------------------

                                       18
<PAGE>

                                    EXHIBIT A

         The Collateral consists of all of Borrower's right, title and interest
in and to the following whether owned now or hereafter arising:

         All goods and equipment now owned or hereafter acquired, including,
without limitation, all machinery, fixtures, vehicles (including motor vehicles
and trailers), and any interest in any of the foregoing, and all attachments,
accessories, accessions, replacements, substitutions, additions, and
improvements to any of the foregoing, wherever located;

         All inventory, now owned or hereafter acquired, including, without
limitation, all merchandise, raw materials, parts, supplies, packing and
shipping materials, work in process and finished products including such
inventory as is temporarily out of Borrower's custody or possession or in
transit and including any returns upon any accounts or other proceeds, including
insurance proceeds, resulting from the sale or disposition of any of the
foregoing and any documents of title representing any of the above;

         All contract rights and general intangibles (as such definitions may be
amended from time to time according to the Code), now owned or hereafter
acquired, including, without limitation, goodwill, trademarks, servicemarks,
trade styles, trade names, patents, patent applications, leases, license
agreements, franchise agreements, blueprints, drawings, purchase orders,
customer lists, route lists, infringements, claims, computer programs, computer
discs, computer tapes, literature, reports, catalogs, design rights, income tax
refunds, payments of insurance and rights to payment of any kind;

         All now existing and hereafter arising accounts, contract rights,
royalties, license rights and all other forms of obligations owing to Borrower
arising out of the sale or lease of goods, the licensing of technology or the
rendering of services by Borrower (as such definitions may be amended from time
to time according to the Code) whether or not earned by performance, and any and
all credit insurance, insurance (including refund) claims and proceeds,
guaranties, and other security therefor, as well as all merchandise returned to
or reclaimed by Borrower;

         All documents, cash, deposit accounts, securities, securities
entitlements, securities accounts, investment property, financial assets,
letters of credit, letter of credit rights, certificates of deposit, instruments
and chattel paper and electronic chattel paper now owned or hereafter acquired
and Borrower's Books relating to the foregoing;

         All copyright rights, copyright applications, copyright registrations
and like protections in each work of authorship and derivative work thereof,
whether published or unpublished, now owned or hereafter acquired; all trade
secret rights, including all rights to unpatented inventions, know-how,
operating manuals, license rights and agreements and confidential information,
now owned or hereafter acquired; all mask work or similar rights available for
the protection of semiconductor chips, now owned or hereafter acquired; all
claims for damages by way of any past, present and future infringement of any of
the foregoing; and

         All Borrower's Books relating to the foregoing and any and all claims,
rights and interests in any of the above and all substitutions for, additions
and accessions to and proceeds thereof.

         Notwithstanding the foregoing, the Collateral shall not be deemed to
include any copyrights, copyright applications, copyright registration and like
protection in each work of authorship and derivative work thereof, whether
published or unpublished, now owned or hereafter acquired; any patents, patent
applications and like protections including without limitation improvements,
divisions, continuations, renewals, reissues, extensions and
continuations-in-part of the same, trademarks, servicemarks and applications
therefor, whether registered or not, and the goodwill of the business of
Borrower connected with and symbolized by such trademarks, any trade secret
rights, software, software code, algorithms, technology, designs, discoveries,
processes, improvements, formulas, derivative works, including any rights

<PAGE>

to unpatented inventions, know-how, operating manuals, license rights and
agreements and confidential information, now owned or hereafter acquired; or any
claims for damage by way of any past, present and future infringement of any of
the foregoing (collectively, the "Intellectual Property"), except that the
Collateral shall include the proceeds of all the Intellectual Property that are
accounts, (i.e. accounts receivable) of Borrower, or general intangibles
consisting of rights to payment, if a judicial authority (including a U.S.
Bankruptcy Court) holds that a security interest in the underlying Intellectual
Property is necessary to have a security interest in such accounts and general
intangibles of Borrower that are proceeds of the Intellectual Property, then the
Collateral shall automatically, and effective as of the Closing Date, include
the Intellectual Property to the extent necessary to permit perfection of Bank's
security interest in such accounts and general intangibles of Borrower that are
proceeds of the Intellectual Property.

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