<PAGE>

                                                                   EXHIBIT 10.21





                                 LOAN AGREEMENT


                                     between


                        THE INDUSTRIAL DEVELOPMENT BOARD
                           OF BLOUNT COUNTY, TENNESSEE


                                       and


                  ADVANCED CRYSTAL TECHNOLOGY, INC. (ACT, INC.)




                                    Securing:

                   $5,000,000 THE INDUSTRIAL DEVELOPMENT BOARD
                           OF BLOUNT COUNTY, TENNESSEE
                INDUSTRIAL DEVELOPMENT REVENUE BONDS, SERIES 1988
             (ADVANCED CRYSTAL TECHNOLOGY, INC. (ACT, INC.) PROJECT)




                                   Dated as of
                                 August 1, 1988





<PAGE>

                                TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                                    Page
                                                                                                    ----
                                    ARTICLE I
                                   DEFINITIONS
<S>               <C>                                                                               <C>
Section 1.01      Definitions....................................................................     2


                                   ARTICLE II
                         REPRESENTATIONS AND WARRANTIES

Section 2.01      Representations, Warranties and Covenants of the Issuer........................     3
Section 2.02      Representations, Warranties and Covenants of the Company.......................     4


                                   ARTICLE III
                            LOAN OF BOND PROCEEDS FOR
            ACQUISITION, CONSTRUCTION AND INSTALLATION OF THE PROJECT

Section 3.01      Loan of Bond Proceeds; Acquisition, Construction and
                    Installation of the Project..................................................     7
Section 3.02      Insufficient Moneys in Construction Fund.......................................     7
Section 3.03      Plans and Specifications.......................................................     8
Section 3.04      Completion Date................................................................     8
Section 3.05      Operation and Maintenance of Project; Renovation...............................     8
Section 3.06      Removal of Project Equipment...................................................     9
Section 3.07      Insurance......................................................................     9


                                   ARTICLE IV
                 ISSUANCE OF THE BONDS; DISPOSITION OF PROCEEDS
                         OF THE BONDS; CONSTRUCTION FUND

Section 4.01      Issuance of the Bonds..........................................................     10
Section 4.02      Issuance of Other Obligations..................................................     10
Section 4.03      Disposition of Bond Proceeds...................................................     10
Section 4.04      Disbursements from Construction Fund...........................................     10
Section 4.05      Investments....................................................................     11


                                    ARTICLE V
                         TITLE TO PROJECT; LOAN PAYMENTS
Section 5.01      Title to Project...............................................................     12
Section 5.02      Loan Payments..................................................................     12
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
                                                                                                     Page
                                                                                                     ----
                                   ARTICLE VI
                       LETTER OF CREDIT; PAYMENTS TO TRUSTEE;
                                OTHER OBLIGATION

<S>               <C>                                                                                <C>
Section 6.01      Letter of Credit...............................................................     13
Section 6.02      Payments Assigned; Obligations Absolute........................................     14
Section 6.03      Payments of Administration Expenses............................................     14
Section 6.04      Release and Indemnification Covenants..........................................     14
Section 6.05      Payment of Taxes; Discharge of Liens...........................................     16
Section 6.06      Obligations Under Other Contracts..............................................     17


                                   ARTICLE VII
                             DAMAGE AND DESTRUCTION

Section 7.01      Damage, Destruction and Condemnation...........................................     18


                                  ARTICLE VIII
                                SPECIAL COVENANTS

Section 8.01      The Company to Maintain its Existence..........................................     19
Section 8.02      Reports to the Trustee and Bank................................................     19
Section 8.03      Permits or Licenses............................................................     20
Section 8.04      Inspection of the Project......................................................     21
Section 8.05      Arbitrage Covenant.............................................................     21
Section 8.06      Issuer to Maintain Existence...................................................     21
Section 8.07      Tax Exempt Status of the Bonds.................................................     21
Section 8.08      Recording and Maintenance of Liens.............................................     21
Section 8.09      Authorized Issuer Representative...............................................     22
Section 8.10      Authorized Company Representative..............................................     22


                                   ARTICLE IX
                         ASSIGNMENT, LEASING AND SELLING

Section 9.01      Conditions.....................................................................     23
Section 9.02      Instruments Furnished to Trustee...............................................     23
Section 9.03      Limitation.....................................................................     23
</TABLE>


                                     - ii -

<PAGE>

<TABLE>
<CAPTION>
                                                                                                     Page
                                                                                                     ----
                                    ARTICLE X
                         EVENTS OF DEFAULT AND REMEDIES
<S>               <C>                                                                                <C>
Section 10.01     Events of Default..............................................................     24
Section 10.02     Force Majeure..................................................................     25
Section 10.03     Remedies.......................................................................     25
Section 10.04     No Remedy Exclusive............................................................     26
Section 10.05     Reimbursement of Attorneys' Fees...............................................     26
Section 10.06     Waiver of Breach...............................................................     26


                                   ARTICLE XI
                           OPTIONS IN FAVOR OF COMPANY

Section 1101      Option to Prepay Loan Payments.................................................     27
Section 11.02     INTENTIONALLY OMITTED..........................................................     27
Section 11.03     INTENTIONALLY OMITTED..........................................................     27
Section 11.04     Compliance with the Indenture..................................................     27


                                   ARTICLE XII
                     OBLIGATION TO ACCELERATE LOAN PAYMENTS

Section 12.01     Determination of Taxability....................................................     28


                                  ARTICLE XIII
                                  MISCELLANEOUS

Section 13.01     INTENTIONALLY OMITTED..........................................................     29
Section 13.02     Notices........................................................................     29
Section 13.03     Parties in Interest............................................................     29
Section 13.04     Amendments.....................................................................     29
Section 13.05     Counterparts...................................................................     29
Section 13.06     Severability...................................................................     29
Section 13.07     Governing Law..................................................................     30
Section 13.08     Company, Trustee and Issuer May Rely on Authorized
                    Representatives..............................................................     30
Section 13.09     Limited Liability of Officers, Etc.............................................     30


Exhibit A........................................................................................     31
Exhibit B........................................................................................     33
Exhibit C........................................................................................     35
</TABLE>


                                     - iii -
<PAGE>

                                 LOAN AGREEMENT

         THIS LOAN AGREEMENT, made and entered into as of August 1, 1988 by and
between The Industrial Development Board of Blount County, Tennessee a public
corporation duly organized and validly existing under the laws of the State of
Tennessee (the "Issuer") and Advanced Crystal Technology, Inc. (ACT, Inc., a
Tennessee corporation (the "Company");

                              W I T N E S S E T H:
                              - - - - - - - - - -

         WHEREAS, pursuant to Tennessee Code Annotated, Section 7-53-101 et
seq., as amended, (collectively, the "Act"), the Issuer is authorized and
empowered to issue its industrial development revenue bonds to finance the cost
of the acquisition, construction, improvement and equipping of a "Project" as
defined in the Act and is vested with powers necessary to enable it to
accomplish such purposes; and

         WHEREAS, pursuant to and in accordance with the provisions of the Act,
the Issuer has agreed to issue its bonds and to use the proceeds therefrom for
the purpose of lending proceeds thereof to the Company to finance a portion of
the cost of acquisition, construction and equipping of a manufacturing plant and
equipment to be used by the Company in connection with the manufacture of
optical components at a facility located in the unincorporated area of Blount
County, Tennessee (the "Project") which Project will constitute a "Project"
under the Act; and

         WHEREAS, the Issuer and the Company have agreed to enter into this Loan
Agreement pursuant to which the Issuer will lend the proceeds of the Bonds (as
herein defined) to the Company to finance a portion of the Project and the
Company will make Loan Payments (as hereinafter defined) to the Issuer in an
amount sufficient to pay the principal of and premium, if any, and interest on
such Bonds as and when the same shall become due and payable; and

         WHEREAS, the Bonds are to be issued pursuant to and secured by a Trust
Indenture dated as of the date hereof (the "Indenture"), by and between the
Issuer and Mitsui Finance Trust Company of New York, as Trustee (the "Trustee");
and

         WHEREAS, in order to support payment when due, whether at maturity,
upon redemption or acceleration or otherwise, of the principal of and premium,
if any, and interest on the Bonds, the Company has entered into a Letter of
Credit and Reimbursement Agreement dated as of the date hereof (the
"Reimbursement Agreement") with The Industrial Bank of Japan, Limited, New York
Branch (the "Bank"), pursuant to which the Bank has agreed to issue an
irrevocable transferable letter of credit in favor of the Trustee.

         NOW, THEREFORE, FOR AND IN CONSIDERATION OF THE RESPECTIVE
REPRESENTATIONS AND COVENANTS CONTAINED HEREIN, THE PARTIES HERETO AGREE AS
FOLLOWS (PROVIDED, HOWEVER, THAT IN THE PERFORMANCE OF THE AGREEMENTS OF THE
ISSUER HEREIN CONTAINED, ANY OBLIGATION OF THE ISSUER CREATED BY OR ARISING



<PAGE>

OUT OF THIS LOAN AGREEMENT SHALL NEVER CONSTITUTE AN INDEBTEDNESS OR AN
OBLIGATION NOR GIVE RISE TO A PECUNIARY LIABILITY OF THE ISSUER, BLOUNT COUNTY,
THE STATE OF TENNESSEE (THE "STATE"), OR ANY POLITICAL SUBDIVISION THEREOF OR A
CHARGE AGAINST THE GENERAL CREDIT OR TAXING POWERS, IF ANY, OR ANY OF THEM, BUT
SHALL BE A SPECIAL LIMITED OBLIGATION OF THE ISSUER PAYABLE SOLELY OUT OF THE
PROCEEDS DERIVED FROM THIS LOAN AGREEMENT, THE INSURANCE OR CONDEMNATION AWARDS
AS HEREIN PROVIDED AND ANY OTHER REVENUES ARISING OUT OF OR IN CONNECTION WITH
THIS LOAN AGREEMENT, AND THE SALE OF THE BONDS REFERRED TO IN SECTION 4.01
HEREOF, AND SHALL NOT BE A GENERAL OBLIGATION OF THE ISSUER OR CHARGE UPON ANY
OTHER REVENUES, RECEIPTS OR PROPERTY OF THE ISSUER), TO WIT:

                                     - 2 -
<PAGE>

                                    ARTICLE I

                                   DEFINITIONS

         Section 1.01. Definitions. Except as herein defined, the term defined
in Article I of the Indenture shall for all purposes of this Loan Agreement have
the meanings therein specified, unless the context clearly requires otherwise.


                                     - 3 -
<PAGE>

                                   ARTICLE II

                         REPRESENTATIONS AND WARRANTIES

         Section 2.01. Representations, Warranties and Covenants of the Issuer.
The Issuer makes the following representations, warranties and covenants as the
basis for the undertakings on the part of the Company contained herein and of
the Trustee contained in the Indenture:

         (a) The Issuer is a public corporation duly organized and validly
existing under the laws of the State. Under the provisions of the Act, the
Issuer has the power to enter into the transactions contemplated by this Loan
Agreement, the Bond Purchase Agreement, the Bond Resolution, the Indenture, the
Indexing Agent Agreement and the Bonds, and to carry out its obligations
hereunder and thereunder. The Project constitutes a "Project" within the meaning
of the Act and a manufacturing facility with the meaning of Section
144(a)(12)(C) of the Code. By proper action of the Board of Directors of the
Issuer, the Issuer has been duly authorized to issue and deliver the Bonds and
to execute and deliver this Loan Agreement, the Bond Purchase Agreement, the
Indenture, the Tax Regulatory Agreement, the Indexing Agent Agreement and the
various closing certificates, including a nonarbitrage certificate.

         (b) Neither the execution and delivery of this Loan Agreement, the Bond
Purchase Agreement, the Tax Regulatory Agreement, the Indexing Agent Agreement
or the Indenture nor the issuance and sale of the Bonds, nor the performance by
the Issuer of its obligations under this Loan Agreement, the Bond Purchase
Agreement, the Indenture, the Tax Regulatory Agreement, the Indexing Agent
Agreement or the Bonds will constitute on the part of the Issuer a breach of, or
a default under, any existing law, court or administrative regulation, decree or
order of the Issuer or any agreement, indenture, mortgage, lease or other
instrument to which the Issuer is subject or by which it is or may be bound.

         (c) The Issuer will issue its Bonds in the aggregate principal amount
of $5,000,000 and will use the proceeds therefrom to make a loan to the Company
to pay for the Costs of the Project to the extent funds from such Bond proceeds
are available therefor.

         (d) The Bonds will be issued under the Indenture and the Bond
Resolution and will mature, bear interest, be redeemable and have the other
terms and provisions set forth in the Indenture and the Bond Resolution. The
Issuer has not assigned its interest in this Loan Agreement other than to the
Trustee.

         (e) Under existing statutes and decisions, no taxes on income or
profits are imposed on the Issuer.

         (f) The Issuer is not in default under any of the provisions of the
laws of the State which would affect its existence or its powers referred to in
the preceding subsection (a).

                                     - 4 -
<PAGE>

         (g) The Issuer hereby finds and determines that all requirements of the
Act have been complied with.

         (h) During the term of this Loan Agreement (including any renewal
thereof), the Issuer will not allow any encumbrances on the Project, other than
Permitted Encumbrances without the written consent of the Authorized Company
Representative and the Trustee.

         Section 2.02. Representations, Warranties and Covenants of the Company.
The Company makes the following representations, warranties and covenants as the
basis for the undertakings on the part of the Issuer contained herein and of the
Trustee contained in the Indenture:

         (a) The Company is a corporation duly organized, validly existing and
in good standing under the laws of the State.

         (b) The Company has all requisite power and authority necessary (i) to
own and operate its properties, (ii) to carry on its business as presently
proposed to be conducted, and (iii) to execute and deliver and to perform and
observe the covenants and agreements on its part contained in this Loan
Agreement, the Reimbursement Agreement, the Remarketing Agreement, the Indexing
Agent Agreement, the Mortgage, the Bond Purchase Agreement, the Pledge
Agreement, the Tax Regulatory Agreement and all other instruments referred to
herein and therein to which it is a party.

         (c) All necessary orders, consents, authorizations, permits, licenses
and approvals legally required by governmental authorities to be obtained to the
date hereof in connection with the acquisition of the Project have been obtained
or are in the process of being obtained and are in full force and effect, and
the Company knows of no reason why it cannot obtain all other necessary orders,
consents, authorizations, permits, licenses and approvals legally required by
governmental authorities required to be obtained after the date hereof in
connection with the completion of the acquisition, construction and installation
and the operation of the Project. Copies of all such permits, licenses and
approvals obtained on or before the time of the issuance and delivery of the
Bonds have been delivered to the Trustee.

         (d) This Loan Agreement, the Reimbursement Agreement, the Remarketing
Agreement, the Pledge Agreement, the Indexing Agent Agreement, the Mortgage, the
Tax Regulatory Agreement and the Bond Purchase Agreement have each been duly
authorized, executed and delivered by the Company, and, assuming due
authorization, execution and delivery by the other party or parties hereto and
thereto, this Loan Agreement, the Reimbursement Agreement, the Remarketing
Agreement, the Pledge Agreement, the Indexing Agent Agreement, the Mortgage, the
Tax Regulatory Agreement and the Bond Purchase Agreement are each legal, valid
and binding obligations of the Company, enforceable against the Company in
accordance with their respective terms, except as the enforceability thereof may
be subject to bankruptcy, insolvency, reorganization, moratorium and other laws
relating


                                     - 5 -
<PAGE>

to or affecting creditors' rights generally and general equitable principles
(including the exercise of judicial discretion in accordance with such
principles)

         (e) The execution and delivery of this Loan Agreement, the
Reimbursement Agreement, the Remarketing Agreement, the Mortgage, the Pledge
Agreement, the Indexing Agent Agreement, the Tax Regulatory Agreement and the
Bond Purchase Agreement, compliance with the terms, conditions and provisions
hereof and thereof and the consummation of the transactions herein and therein
contemplated do not and will not violate any law or any regulation, order, writ,
injunction or decree of any court or governmental instrumentality applicable to
the Company, or result in a breach of any of the terms, conditions or provisions
of the Articles of Incorporation or By-Laws of the Company or of any mortgage,
indenture, agreement or instrument to which the Company is a party or by which
it or any of its properties are bound.

         (f) There is no action, suit, proceeding, inquiry or investigation
before or by any court, public board or body pending or, to the knowledge of the
Company, threatened against or affecting the Company wherein an unfavorable
decision, ruling or finding could have a material adverse effect on the
properties, business, condition (financial or other), or results of operations
of the Company or which would adversely affect the validity or enforceability
of, or the authority or ability of the Company to perform its obligations under,
this Loan Agreement, the Reimbursement Agreement, the Remarketing Agreement, the
Pledge Agreement, the Indexing Agent Agreement, the Bond Purchase Agreement the
Tax Regulatory Agreement or the Mortgage.

         (g) The estimated Cost of the Project is as set forth in the Project
Certificate and has been determined in accordance with sound engineering and
accounting principles.

         (h) The land and building constituting the Project are described in
Exhibit A hereto and the Project Equipment is described in Exhibit B hereto and
no changes shall be made in construction of the Project which will have the
effect of firing the effective use or character of the Project, as contemplated
by this Loan Agreement, or of disqualifying the Project as an "economic
development facility" under the Act and "manufacturing facility" under Section
144(a)(12)(C) of the Code. The Company intends to use, and will use, the Project
in a manner so as to maintain the status of the Project as a "manufacturing
facility" under Section 144(a)(12)(C) of the Code. The Project is located within
the planning and zoning jurisdiction of the Issuer.

         (i) The statements, information and descriptions contained in the
Project Certificate, as of the date hereof and at he time of the delivery of the
Bonds to the Purchasers, are and will be true, correct and complete, do not and
will not contain any untrue statement or misleading statement of a material
fact, and do not and will not omit to state a material fact required to be
stated therein or necessary to make the statements, information and descriptions
contained therein, in light of the


                                     - 6 -
<PAGE>

circumstances under which they were made, not misleading, and the estimates and
the assumptions contained in the Project Certificate, as of the date hereof and
at the time of the delivery of the Bonds, are and will be reasonable and base on
the best information available to the Company.

         (j) The Company will not use the Project in such manner as to, or take
or permit any one to take any action which would, impair the exemption of
interest on the Bonds from federal income taxation, and will not use the Project
in a manner not authorized by the terms of this Loan Agreement and Exhibits
hereto.

         (k) The Company covenants and agrees that during the period beginning
on the date of issuance of the Bonds and ending upon the termination of this
Loan Agreement, the Company, at the request of the Issuer or the Trustee, will
permit a duly authorized agent of the Issuer or the Trustee to enter upon and
inspect the Project during regular business and to examine and copy at the
principal office of the Company all books, records and other documents of the
Company relating to the number and types of jobs at the Project.

         (l) To the best knowledge of the Company, no member of the Issuer or
officer, agent or employee thereof is, in his or her own name or in the name of
a nominee, an officer, director or holder of an ownership interest in any
person, association, trust, corporation, partnership or other entity which is,
in its own name or in the name of a nominee, a party to any contract or
agreement upon which the member or officer, or employee may be called upon to
act or vote in connection with the Project.

                                     - 7 -
<PAGE>

                                   ARTICLE III

                            LOAN OF BOND PROCEEDS FOR
            ACQUISITION, CONSTRUCTION AND INSTALLATION OF THE PROJECT

         Section 3.01. Loan of Bond Proceeds; Acquisition, Construction and
Installation of the Project. The Issuer hereby agrees to loan the proceeds of
the Bonds to the Company, and the Company hereby agrees that it will complete
the acquisition, construction and installation of the Project as promptly as
practicable, and that it will acquire and install other facilities and personal
property deemed necessary for the operation of the Project, all substantially in
accordance with the installation plans and specifications therefor, including
any, and all supplements, amendments and additions (or deletions) thereto (or
therefrom); provided, however, that such other facilities and property shall not
materially impair the effective use of the Project as contemplated by this Loan
Agreement or disqualify the Project as a "Project" within the meaning of the Act
and a "manufacturing facility" within the meaning of Section 144(a)(12)(C) of
the Code. The Company will enter into such contracts for the acquisition,
construction and installation of the Project and shall appoint such agents to
act on its behalf with respect to the acquisition, construction and installation
of the Project as shall be necessary. The Company hereby agrees to bring any
actions or proceedings against any person which the Company may deem proper to
cause the completion of the Project. The Company agrees to use its best efforts
to complete the acquisition, construction and installation of the Project as
promptly as practicable after receipt of the proceeds from the sale of the
Bonds, delays incident to strikes, riots, acts of God or the public enemy beyond
the reasonable control of the Company only excepted; but if such acquisition,
construction and installation is not completed, there shall be no resulting
liability on the part of the Issuer and no diminution in the Loan Payments
required in Section 5.02 hereof.

         Section 3.02. Insufficient Moneys in Construction Fund. If the moneys
in the Construction Fund, together with any other moneys made available to pay
the Costs of the Project, shall not be sufficient to pay the Costs of the
Project in full, then the Company shall pay all that portion of the Costs of the
Project in excess of the moneys available therefor.

         The Issuer does not make any warranty, either express or implied, that
the moneys which will be paid into the Construction Fund will be sufficient to
pay the Costs of the Project in full.

         If the Company shall make any payments pursuant to this Section 3.02,
it shall not be entitled to any reimbursement therefor from the Issuer or the
Owners of the Bonds or from the Trustee except to the extent of moneys available
therefor in the Construction Fund (if any), nor shall it be entitled to any
diminution in or postponement of the payment of the Loan Payments or the payment
of any other amount is payable under this Loan Agreement.

                                     - 8 -
<PAGE>

         Section 3.03. Plans and Specifications. The Plans and Specifications
will be filed with the Trustee and the Bank on or prior to the first
disbursement of moneys from the Construction Fund to pay Costs of the Project
(other than Costs of Issuance) as provided in Section 4.04 hereof. The Company
may revise its Plans and Specifications for the Project (including without
limitation, any changes therein, additions thereto, substitutions therefor and
deletions therefrom and revisions not theretofore referred to or contemplated in
Exhibit A or B hereto) at any time and from time to time in any respect;
provided, however, that if any such revision shall render inaccurate in a
material way the description of the Project contained in the Exhibits hereto,
the Company shall deliver to the Issuer and the Trustee (a) a revised Exhibit A
or B, or, if applicable, both, containing a description of the ct as revised,
the accuracy of which shall have been certified by an Authorized Company
Representative, and (b) an on of Bond Counsel to the effect that the Project as
described in the revised Exhibit A or B; or, if applicable, both, is such that
the expenditure of the proceeds of the sale of the Bonds pursuant to this Loan
Agreement shall not impair the validity of the Bonds under the Act or the
exclusion of the interest on the Bonds, from the gross income of the Owners of
Bonds for federal income tax purposes. A revision of Exhibit A or B, or, if
applicable, both, hereto pursuant to Section 3.03 shall not constitute an
amendment, change or modification of this Loan Agreement within the meaning of
Article XIV of the Indenture.

         Section 3.04. Completion Date. The Completion Date shall be evidenced
to the Issuer, the Bank, the Trustee and the Company by a certificate signed by
the Authorized Company Representative stating (a) the date on which the Project
was substantially completed, (b) that all other facilities and equipment
necessary in connection with the Project have been acquired and installed, (c)
that the acquisition, construction and installation of the Project and such
other facilities and equipment have been accomplished in such a manner as to
conform with all applicable zoning, planning, building, environmental and other
similar governmental regulations, (d) that all Costs of the Project then or
theretofore due and payable have been paid and (e) that the amounts which the
Trustee shall retain in the construction Fund for the payment of Costs of the
Project not then due or for liabilities which the Company is contesting or which
otherwise should be retained and the reasons such amounts should be retained.
Such certificate shall state that it is given without prejudice to any rights
against third parties which then exist or may subsequently come into being and
shall be approved in writing by the Authorized Issuer Representative and the
Authorized Bank Representative. The Authorized Company Representative shall
include with such certificate a statement specifically describing all items of
personal property comprising a part of the Project. The Certificate shall be
delivered as promptly as practicable after the occurrence of the events and
conditions referred to in subsections (a) through (d) of this Section.

         Surplus proceeds in the Construction Fund shall be deposited in the
Bond Fund as provided in Section 5.02 of the Indenture and shall be applied as
provided in Section 4.04(b) of the Indenture.

         Section 3.05. Operation and Maintenance of Project; Renovation. The
Company shall at all times, at its own expense, maintain, preserve and keep the
Project, and every element and unit thereof, in good repair, working order and
condition, and from time to time make all needful and proper repairs and


                                     - 9 -
<PAGE>

renewals thereto and otherwise maintain the Project; provided, however, that the
Company shall have no obligation to operate, maintain or repair any element or
item of the Project the operation, maintenance, or repair of which becomes
uneconomic to the Company because of damage or destruction or obsolescence
(including economic obsolescence), or change in government standards and
regulations, or the termination by the Company of the operation of the
facilities to which the element or item of the Project is an adjunct if and so
long as the Company is proceeding in good faith to maintain the availability of
the Project for use as an authorized "Project" under the Act and a
"manufacturing facility" under Section 144(a)(12)(C) of the Code.

         After the Completion Date, the Company may at its own expense remodel
the Project or make such substitution, modifications and improvements to the
Project from time to time as it, in its discretion, may deem to be desirable for
its uses and purposes, which renovation, substitutions, modifications and
improvements shall be included under the terms of this Loan Agreement as part of
the Project.

         Section 3.06. Removal of Project Equipment. The Company shall not be
under any obligation to renew, repair or replace any inadequate, obsolete, worn
out, unsuitable, undesirable or unnecessary item of Project Equipment. In any
instance where the Company in its sole discretion determines that any items of
Project Equipment have become inadequate, obsolete, worn out, unsuitable,
undesirable or unnecessary, the Company may remove such items of Project
Equipment and (on behalf of the Issuer), sell, trade-in, exchange or otherwise
dispose of them (in whole or in part) without any responsibility or
accountability to the issuer or the Trustee.

         Section 3.07. Insurance. The Company shall provide maintain insurance
as required by the Mortgage, and to the extent such coverage is commercially
available, the Company shall cause all liability insurance policies with respect
to Project to be endorsed to include the Trustee and the Issuer as named
insureds or additional insureds, as appropriate.


                                     - 10 -
<PAGE>

                                   ARTICLE IV

                 ISSUANCE OF THE BONDS; DISPOSITION OR PROCEEDS
                         OF THE BONDS; CONSTRUCTION FUND

         Section 4.01. Issuance of the Bonds. In order to provide funds (a) for
a loan to the Company for the purpose of paying the partial costs of acquiring,
construction and installing the Project and (b) to pay the Costs of Issuance,
the Issuer shall issue the Bonds under and in accordance with the Indenture. The
Company hereby approves the issuance of the Bonds and all terms and conditions
thereof and of the Indenture. The Company recognizes its responsibility to
perform certain of the Issuer's obligations under the Indenture, consents
thereto and agrees to abide thereby.

         Section 4.02. Issuance of Other Obligations. The Issuer and the Company
expressly reserve the right to enter into, to the extent permitted by law, an
agreement or agreements other than this Loan Agreement with respect to the
issuance by the Issuer, under an indenture or indentures other than the
Indenture, of obligations to refund all or any principal amount of the Bonds.

         Section 4.03. Disposition of Bond Proceeds. The Issuer shall establish
the Bond Fund and the Construction Fund with the Trustee in accordance with
Sections 4.01 and 5.01 of the Indenture. In accordance with the provisions of
the Indenture (a) the accrued interest on the Bonds, if any, paid by the
Purchaser shall be deposited into the Bond Fund, and (b) the balance shall be
deposited into the Construction Fund.

         The moneys on deposit in the Construction Fund shall be applied by the
Trustee as provided in Section 4.04 hereof and as otherwise provided in Article
V of the Indenture. Until the moneys on deposit in the Construction Fund are so
applied, such moneys shall be and remain the property of the Company, subject to
the lien of the Indenture, but the Company shall only have such right, title and
interest therein as is expressly provided in this Loan Agreement and the
Indenture.

         Section 4.04. Disbursements from Construction Fund.

         (a) Pursuant to the Indenture, the Issuer has established the
Construction Fund for the payment of the Costs of the Project. The moneys on
deposit in the Construction Fund shall be disbursed from time to time to the
Company to reimburse the Company for portions of the Costs of the Project paid
by it or to make payments to persons designated by the Company in respect of
portions of the Costs of the Project, upon receipt by the Trustee of a Written
Requisition executed by an Authorized Company Representative substantially in
the form attached hereto as Exhibit C; provided, however, that no disbursement
shall be made from the Construction Fund to pay Costs of the Project, other than
Costs of Issuance, until the Company has provided all of the instruments
described in Section 4.04(e) below. Notwithstanding anything herein to the
contrary, disbursements may be made from the Construction Fund to pay Costs of
the Project constituting Costs of Issuance upon presentation to the Trustee of a
Written Requisition in the for required by this Section 4.04(a). Upon request of
the Trustee, the


                                     - 11 -
<PAGE>

Company shall furnish invoices or other documentation in connection with each
such Written Requisition. Any Written Requisition under this Section 4.04 may be
in the form of a communication by telegram, telex or facsimile transmission, but
if, in such form, it shall be promptly confirmed by a Written Requisition
executed by an Authorized Company Representative. The Company shall furnish to
the Issuer a copy of each Written Requisition delivered to the Trustee promptly
upon request therefor.

         (b) In paying any Written Requisition under this Section 4.04, the
Trustee and the Issuer shall be entitled to rely as to the completeness and
accuracy of all statements in such Written Requisition upon the approval of such
Written Requisition by an Authorized Company Representative, execution thereof
and communication thereof by telegram, telex or facsimile transmission to be
conclusive evidence of such approval, and the Company shall indemnify and save
harmless the Issuer and the Trustee from any liability incurred in connection
with any Written Requisition so executed and communicated by an Authorized
Company Representative.

         (c) The Company shall not submit in the aggregate Written Requisitions
which, if paid, would result in less than 95% pay of the Net Proceeds thereupon
requisitioned being used to Exempt Costs.

         (d) The Company shall not submit or cause to be submitted to the
Trustee any Written Requisition pursuant to this Section 4.04 and shall have no
claim upon any moneys in the Construction Fund, so long as there shall have
occurred and be continuing any Event of Default or any "Event of Default" under
the Indenture.

         Section 4.05. Investments. All moneys held in the Construction Fund
established pursuant to the Indenture shall be invested and einvested and
transferred to any other funds or accounts as provided in the Indenture. Moneys
in the Bond Fund and Bond Purchase Fund shall not be invested.


                                     - 12 -
<PAGE>

                                    ARTICLE V

                         TITLE TO PROJECT; LOAN PAYMENTS

         Section 5.01. Title to Project. The Company will have, upon the
execution and delivery of this Loan Agreement, good and marketable title to the
Project, free from all encumbrances other than the Permitted Encumbrances.

         Section 5.02. Loan Payments.

         (a) In consideration of the loan to the Company hereunder, the Company
shall pay to the Trustee for the account of the Issuer an amount equal to the
aggregate principal amount of the Bonds from time to time Outstanding, and the
premium, if any, and interest thereon, such amounts to be paid in installments
due on the dates, in the amounts and in the manner prodded in the Indenture for
the Issuer to cause amounts to be deposited in the Bond Fund for the payment
when due of the principal of and premium, if any, and interest on the Bonds
whether at maturity, upon redemption, upon acceleration or otherwise; provided,
however, that any amount credited under the Indenture against any payment
required to be made by the Issuer thereunder shall be credited against the
corresponding payment otherwise required to be made by the Company hereunder,
and the obligation of the Company to make such payment hereunder shall be deemed
to have been reduced by the amount of such credit and, provided, further, that
the obligation of the Company to make any payment hereunder shall be satisfied
and discharged to the extent of the corresponding payment made by the Bank to
the Trustee under the Letter of Credit (the "Loan Payments"). The Company agrees
to provide for the delivery of the Letter of Credit to the Trustee to secure
such obligation.

         (b) From the date of the original issuance of the Bond to and including
the date of final maturity of the Bonds, the Company shall provide for the
payment of the principal of the Bonds when due, whether upon redemption or
acceleration, and premium, if any, and interest on the Bonds by the delivery of
the Letter of Credit to the Trustee simultaneously with the original issuance
and delivery of the Bonds, which Letter of Credit shall be in effect until the
Letter of Credit Expiration. The Issuer hereby authorizes and directs the
Trustee to draw moneys under the Letter of Credit in accordance with the
provisions of the Indenture to the extent necessary to pay the principal of and
premium, if any, and interest on the Bond as and when due.

         (c) If the amounts available under the Letter of Credit are
insufficient to pay the principal of the Bonds when due (whether at maturity or
upon acceleration or redemption or otherwise) or to pay premium, if any, or
interest on the Bonds when due, the Company shall be obligated to furnish to the
Trustee a sum equal to the difference between the amount available for such
purpose and such amount due on the Bonds.


                                     - 13 -
<PAGE>

                                   ARTICLE VI

                     LETTER OF CREDIT; PAYMENTS TO TRUSTEE;
                                OTHER OBLIGATIONS

                         Section 6.01. Letter of Credit.

         (a) The Letter of Credit delivered by the Company to the Trustee
pursuant to Section 5.02(b) hereof shall be an irrevocable letter of credit of
The Industrial Bank of Japan, Limited, New York Branch (the "Bank"), or a
commercial bank which (or, if such bank does not have outstanding senior,
long-term debt securities rated by Moody's or S&P, the parent corporation of
which) has outstanding senior long-term debt securities rated in one of the
three highest rating categories by Moody's or S&P.

         The Letter of Credit shall be an obligation of the Bank, which shall
not expire, except as otherwise provided in this Section 6.01, prior to
September 11, 1998, to pay to the Trustee upon request and in accordance with
the terms thereof, up to (i) an amount equal to the aggregate principal amount
of the Bonds then outstanding to pay the principal of the Bonds when due,
whether at maturity, upon purchase, redemption or otherwise and (ii) the
premium, if any, and (iii) an amount equal to at least 65 days' interest on the
Bonds (at the maximum rate of interest thereon permitted under the Indenture) to
pay the interest on the Bonds when due.

         The Bank's obligation under the Letter of Credit may be reduced to the
extent of any drawings thereunder.

         (b) If at any time prior to the expiration of the Letter of Credit the
rating of the Bank is changed, resulting in a lowering of the rating of the
Bonds by Moody's, if the Bond's are then rated by such agency, or by S&P, if the
Bonds are then rated by such agency, the Company may, at its option, provide for
the delivery to the Trustee of an Alternate Letter of Credit. Such Alternate
Letter of Credit shall be an irrevocable letter of credit issued by a commercial
bank, the terms of which shall in all material respects be the same as the
original Letter of Credit whether during a variable interest rate or fixed
interest rate period and which shall have the same expiration date as the Letter
of Credit. On or prior to the date of the delivery of such Alternate Letter of
Credit to the Trustee, the Company shall furnish to the Trustee and the Issuer
(i) an opinion of Bond Counsel stating that the delivery of such Alternate
Letter of Credit to the Trustee is authorized under this Loan Agreement and
complies with the terms hereof and (ii) written evidence from Moody's, if the
Bonds are then rated by Moody' s, and S&P, if the Bonds are then rated by S&P,
in each case to the effect that such rating agency has reviewed the proposed
Alternate Letter of Credit and that the substitution of the proposed Alternate
Letter of Credit for the Letter of Credit will not, by itself, result in a
reduction of its respective rating of the Bonds from that which then prevails.

         (c) Pursuant to the Indenture, in order to exercise its Option to
Convert, the Company must provide an amendment to the Letter of Credit providing
for an interest coverage period of 215 days, computed at the Fixed Rate and
payment


                                     - 14 -
<PAGE>

of any applicable premium or a new Letter of Credit (similar in form the Letter
of Credit) in the amount of the outstanding principal amount of the Bonds plus
any applicable premium and with an interest coverage period of 215 days,
computed at the Fixed Rate.

         Section 6.02. Payments Assigned; Obligations Absolute. It is understood
and agreed that all Loan Payments substantially all other right, title and
interest of the Issuer in, to and under the Loan Agreement are, by the
Indenture, to be pledged by the Issuer to the Trustee. The any assents to such
pledge and agrees that the obligation of the Company to make the Loan Payments
and to pay or make provision for payments to the Trustee under Section 5.02
hereof shall be absolute, irrevocable and unconditional and shall not be subject
to cancellation, termination or abatement, or to any defense other than payment
or to any right of set-off, counterclaim or recoupment arising out of any breach
under this Agreement, the Indenture or otherwise by the Issuer, the Trustee or
any other party or out of any failure or inability of the Trustee for any reason
to realize upon the Letter of Credit or other credit facility provided by the
Company under Section 6.01 hereof, or out of any obligation or liability at any
time owing to the Company by the Issuer, the Trustee or any other party. The
Loan Payments and the other payments due hereunder shall continue to be payable
at the times and in the amount is herein specified whether or not the Project or
any portion thereof shall have been completed or the Project or any portion
thereof shall have been destroyed by fire or other casualty, or title thereto,
or the use thereof, shall have been take by the exercise of the power of eminent
domain, all subject, however, to the provisions for extraordinary redemption as
set forth in the Indenture and that there shall be no abatement of or diminution
in any such payments by reason thereof, whether or not the Project shall be used
or useful and whether or not any applicable laws, regulations or standards shall
prevent or prohibit the use of the Project, or for any other reason.

         Section 6.03. Payment of Administration Expenses. The Company shall
pay, or cause to be paid, when due all Ad ministration Expenses, the payment of
the compensation and the reimbursement of expenses, advances, indemnities and
other amount is payable to the Trustee, the Paying Agent, the Tender Agent and
the Registrar under the Indenture to be made directly to such entity, including
without limitation the costs set forth in Section 12.04 of the Indenture.

         Section 6.04. Release and Indemnification Covenants. (a) The Company
releases the Trustee, the Remarketing Agent, the Tender Agent, the Paying Agent,
the Registrar and the Bank from, agrees that the Trustee, the Remarketing Agent,
the Tender Agent, the Paying Agent, the Registrar and the Bank shall not be
liable for, and agrees to indemnify and hold the Trustee, the Remarketing Agent,
the Tender Agent, the Paying Agent, the Registrar and the Bank free and harmless
from, any liability for any loss or damage to property or any injury to or death
of any person that may be occasioned by any cause whatsoever pertaining to the
Project or the financing thereof, except in any case as a result of the gross
negligence or willful misconduct of the person otherwise entitled to
indemnification hereunder.


                                     - 15 -
<PAGE>

         (b) The Company will indemnify and hold the Trustee, the Remarketing
Agent, the Tender Agent, the Paying Agent, the Registrar and the Bank free and
harmless from any loss, claim, damage, tax (other than tax incurred on fees paid
to the Trustee, the Remarketing Agent, the Tender Agent, the Paying Agent, the
Registrar and the Bank by the Company), penalty, liability (including but not
limited to liability for any patent infringement), disbursement, litigation
expenses, attorneys' fees and expenses or court costs arising out of, or in any
way relating to, the execution or performance of this Loan Agreement or any
other documents referred to herein or contemplated hereby, the issuance or sale
of the Bonds, actions taken or forborne under the Indenture or with respect to
the acceptance or administration of the trust thereunder or any cause whatsoever
pertaining to the Project, except in any case, as to the liability of each of
the Trustee, the Remarketing Agent, the Tender Agent, the Paying Agent, the
Registrar or the Bank as a result of its own gross negligence or willful
misconduct and except with respect to any liability incurred by each of the
Trustee, the Remarketing Agent, the Tender Agent, the Paying Agent, the
Registrar or the Bank with respect to any information furnished by it in writing
for use in the Preliminary Official Statement or the Official Statement.

         (c) The Company releases the Issuer (including any person at any time
serving as a member, officer, agent or employee of the Issuer) from, and agrees
that the Issuer (including any person at any time serving as a member, officer,
agent or employee of the Issuer) shall not be liable for, and agrees to
indemnify and hold the Issuer (including any person at any time serving as a
member, officer, agent or employee of the, Issuer) harmless from: (i) any
liability for any loss or damage to property or any injury to, or death of, any
person that may be occasioned by any cause whatsoever pertaining to the Project,
or (ii) any liabilities, losses or damages, or claims therefor, arising out of
failure, or claimed failure, of the Company to comply with its covenants
contained in this Loan Agreement. In addition, the Company agrees to indemnify
and hold the Issuer (including any person at any time serving as a member,
officer, agent or employee of the Issuer) harmless to the fullest extent
permitted by law to any losses, costs, charges, expenses, judgments and
liabilities incurred by it in connection with any action, suit or proceeding
instituted or threatened in connection with the transactions contemplated by
this Loan Agreement. If any such claim is asserted, the Issuer or any individual
indemnified herein, as the case may be, will give prompt written notice to the
Company and the Company will promptly assume the defense thereof, including the
employment of counsel and payment of all expenses of such defense, with full
power to litigate, compromise or settle the same in its sole discretion;
provided that the Issuer shall have the right to approve in writing all counsel
engaged by the Company to conduct such defense.

         (d) Each of the Trustee, the Remarketing Agent, the Tender Agent, the
Paying Agent, the Registrar, the Bank and the (each an "Indemnified Person")
shall have the right to employ separate counsel in any action in respect of
which it may be entitled to indemnification hereunder and to participate in the
defense thereof, but the fees and expenses of such counsel shall be at the
expense of such Indemnified Person unless (a) the employment thereof has been
specifically authorized by the Company, (b) the Company has failed to assume the
defense and employ counsel, or


                                     - 16 -
<PAGE>

(c) the parties to any such action (including any impleaded parties) include
such Indemnified Person (or any person serving at any time as one of its
members, directors, officers, agents or employees) and the Company, and such
Indemnified Person shall have been advised by its counsel that representation of
the Company and such Indemnified Person (or any person serving at any time as
one of its members, directors, officers, agents or employees) by the counsel
could be inappropriate under applicable standards of professional conduct due to
actual or potential differing interests between them (in which case, if such
Indemnified Person notifies the Company in writing that it elects to employ
separate counsel at the expense of the Company, the Company shall not have the
right to assume the defense of such action on behalf of such Indemnified
Person). It is understood that the Company shall, in connection with any one
such action or separate but substantially similar or related actions in the same
jurisdiction arising out of the same general allegations circumstances, be
liable for the fees and expenses of only one separate firm of attorneys at any
time if such Indemnified Person (or any person serving at any time as one of its
members, directors, officers, agents or employees) and the Company do not have
(in the opinion of such counsel for such Indemnified Person) actual or potential
differing interest among themselves, which firm shall be designated in writing
by Company, subject to the written approval of such Indemnified Person as
aforesaid. The Company shall not be liable for any settlement of any such action
effected without its written consent, but if settled with its written consent or
if there is a final judgment for the plaintiff in any such action, the Company
agrees to indemnify and hold harmless such Indemnified Person (including any
person serving at any time as a member, director, officer, agent or employee of
the Issuer) from and against any loss, liability, damage or expense by reason of
such settlement or judgment.

         Section 6.05. Payment of Taxes; Discharge of Liens. The Company shall:
(a) pay, or make provision for payment of, all lawful taxes and assessments,
including income, profits, property or excise taxes, if any, or other municipal
or governmental charges, levied or assessed by any federal, state or municipal
government or political body upon the Project or any part thereof or upon the
Issuer with respect to the Loan Payments or any utilities charges and any and
all other costs, charges or impositions associated with the Project when the
same shall become due; and (b) pay or cause to be satisfied and discharged or
make adequate provision to satisfy and discharge, within sixty (60) days after
the same shall accrue, any lien or charge upon the Project or the Loan Payments
and all lawful claims or demands for labor, materials, supplies or other charges
which, if unpaid, might be or become a lien thereon; provided, however, that, if
the Company shall first notify the Issuer, the Bank and the Trustee of its
intention so to do, the Company may in good faith contest any such lien or
charge or claims or demands in appropriate legal proceedings, and in such event
may permit the items so contested to remain undischarged and unsatisfied during,
the period of such contest and any appeal therefrom, unless by nonpayment of any
such items the lien of the Indenture as to the Loan Payments as to the Project
will be materially endangered, in which event the Company shall promptly pay and
cause to be satisfied and discharged all such unpaid items. The Issuer shall
cooperate fully with the Company in any such contest.


                                     - 17 -
<PAGE>

         Section 6.06. Obligations Under Other Contracts. The Company shall
materially perform its obligations under any contract or agreement n connection
with the Bonds or the Project.


                                     - 18 -
<PAGE>

                                   ARTICLE VII

                             DAMAGE AND DESTRUCTION

         Section 7.01. Damage, Destruction and Condemnation. There is hereby
incorporated herein and made a part hereof Article III of the Mortgage. Prior to
the termination of the Letter of Credit all actions taken under this Section
7.01 shall be taken at the direction of the Bank.

                                     - 19 -
<PAGE>

                                  ARTICLE VIII

                                SPECIAL COVENANTS

         Section 8.01. The Company to Maintain its Existence. During the term of
this Loan Agreement, the Company will do or cause to be done all things
necessary to preserve and keep in full force and effect its corporate existence
and good standing as a corporation in the State, and will not dissolve or
otherwise dispose of all or substantially all of its assets and will not
consolidate with or merge into another corporation or permit one or more other
companies to consolidate or merge into it; provided, that the Company may,
without violating the agreement contained in this Section 8.01 (but subject to
the other covenants herein, including Section 8.07), consolidate with or merge
into another corporation or permit one or more other corporations to consolidate
with or merge into it, or transfer all or substantially all of its assets to
another corporation, but only if the corporation resulting from or surviving
such merger (if other than the Company) or consolidation or the corporation to
which such transfer is made (i) shall expressly assume and agree in writing to
perform all of the Company's obligations under this Loan Agreement, and (ii)
shall be a domestic corporation (i.e., a corporation incorporated and existing
under the laws of one of the states of the United States or the District of
Columbia) or, if not a domestic corporation, shall appoint and maintain an agent
for service of process in the State.

         Section 8.02. Reports to the Trustee and Bank.

         (a) The Company shall prepare and deliver to the Bank, on or before the
forty-fifth (45th) day of each fiscal quarter during the term hereof, a written
report summarizing the operations of the Company during the next preceding
calendar quarter, which report shall include a summary of the progress of
construction, equipping and development of the Project.

         (b) The Company will promptly furnish to the Trustee and the Bank from
time to time such information regarding the business and affairs and financial
condition of the Company as the Trustee and the Bank may reasonably request, and
will furnish to the Trustee and the Bank:

                  (i) As soon as available and in any event within ninety (90)
         days after the close of each of the Company's 6-month fiscal
         half-years, a review of the Company's balance sheet as at the close of
         such fiscal quarter and the unaudited operating statement of the
         Company for such fiscal quarter, setting forth in each case in
         comparative form the figures for the corresponding periods in the
         previous fiscal year as well as year to date figures, all in such
         detail as the Trustee or the Bank may request;

                  (ii) As soon as available and in any event within one hundred
         twenty (120) days after the close of the Company's fiscal years, the
         audited balance sheet of the Company as at the end of such fiscal year
         and the audited operating statements of the Company for such fiscal
         year, setting forth in each


                                     - 20 -
<PAGE>

         case in comparative form the figures for the previous fiscal year,
         accompanied by a certificate of the chief financial officer of the
         Company to the effect that such financial statement have been prepared
         in accordance with generally accepted accounting principles and stating
         that no event of default hereunder exists;

                  (iii) Concurrently with the furnishing of the annual financial
         statements, a schedule, certified as complete and correct by the
         Authorized Company Representative, setting forth full information as to
         the amount, name of insurance company, policy number and a certificate
         issued by the issuer or an independent insurance broker who is the
         broker regularly retained by the Company) evidencing all such insurance
         policies carried by the Company;

                  (iv) Immediately upon becoming aware of the existence of any
         condition or event which constitutes, or with notice or lapse of time,
         or both, would constitute, an Event of Default under this Loan
         Agreement, a written notice specifying the nature and period of
         existence thereof and what action the Company is taking or proposes to
         take with respect thereto;

                  (v) Immediately upon the occurrence of a default under any
         indenture, mortgage, deed to trust, promissory note, lease agreement,
         note agreement or any other agreement or undertaking to which the
         Company is a party, which default results in (or, in the reasonable
         opinion of the Company, is likely to result in) an acceleration of all
         payments due under such documents and could materially and adversely
         affect the property, business, operation, or condition, financial or
         otherwise, of the Company, a written notice specifying the notice given
         or action taken by the Company and the nature of the claimed default
         and that action the Company is taking or proposes to take with respect
         thereto; and

                  (vi) Immediately upon receipt of written notification of any
         action, suit or proceeding pending against or effecting the Company in
         any court or before any arbitrator or governmental authority, which if
         adversely determined could materially and adversely affect the
         property, business, operation, or condition, financial or otherwise, of
         the Company, a written notice specifying the nature hereof and what
         action the Company is taking or proposes to take with respect thereto.

                  Section 8.03. Permits or Licenses. In the event that it may be
necessary for the proper performance of this Loan. Agreement on the part of the
Company or the Issuer that any application or applications for any permit or
license to do or to perform certain things be made to any governmental or other
agency by the Company or the Issuer, the Company and the Issuer each shall, upon
the request of either, execute such application or applications and such actions
shall be at the sole cost of and responsibility of the Company.


                                     - 21 -
<PAGE>

         Section 8.04. Inspection of the Project. After reasonable notice, the
Company agrees that the Issuer and the Trustee and their or any of their duly
authorized agents shall have the right (but not the obligation) at all
reasonable times to enter upon the project site and to examine and inspect the
Project. The Company further agrees that the Issuer and the Trustee and their or
any of their duly authorized agents shall have such rights of access to the
Project as may be reasonably necessary for the proper maintenance and operation
of the Project in the event of failure by the Company to perform its obligations
under Section 3.05 hereof. The Issuer and the Trustee and their or any of their
duly authorized agents shall also be permitted, at all reasonable times to
examine the books and records of the Company with respect to the Project. The
rights of access hereby reserved to the Issuer and the Trustee may be exercised
only after any such agent shall have executed release of liability and secrecy
agreements in the form then currently used by the Company. However, nothing
contained in this Section 8.04 or in any other provision of this Loan Agreement
shall be construed to entitle the Issuer and the Trustee to any information or
inspection involving any confidential proprietary technology of the Company.

         Section 8.05. Arbitrage Covenant. The Issuer and the Company mutually
covenant for the benefit of the Owners of the Bonds and the Issuer that the
proceeds of the bonds, the earnings thereon and any other moneys on deposit in
any fund or account maintained in respect of the Bonds (whether such moneys were
derived for the proceeds of the sale of the bonds or from other sources) will
not be used in a manner which would cause the Bonds to be "arbitrage bonds"
within the meaning of Section 148 of the Code.

         Section 8.06. Issuer to Maintain Existence. The Issuer covenants that
it will use its best efforts to maintain its existence as a public corporation
duly organized and validly existing under the laws of the State or assure the
assumption of its obligations hereunder, under the Indenture and under the Bonds
by any successor public body.

                  Section 8.07. Tax Exempt Status of the Bonds. The Company and
the Issuer covenant to take such action as may be necessary to maintain the
tax-exempt status of the Bonds, and to refrain from taking action which causes
the Bonds to lose their tax-exempt status, all as more fully set forth in the
Tax Regulatory Agreement.

                  Section 8.08.     Recording and Maintenance of Liens.

         (a) The Company will, at its own expense, take all necessary action to
maintain and preserve any liens and security interests of the Indenture so long
as any principal installment of, premium, if any, or interest on the Bonds
remains unpaid.

         (b) The Company will, forthwith after the execution and delivery of
this loan Agreement and the Indenture, and thereafter from time to time, cause
the Indenture (including any amendments thereof and supplements thereto) and any
financing statements in respect thereof to be filed, registered and recorded in
such a manner and in such places as may be required by law in order to publish
notice of any fully to perfect and protect (i) the lien and security interest
thereof upon, and (ii) the


                                     - 22 -
<PAGE>

line and security interest therein granted to the Trustee to the rights of the
Issuer assigned under the Indenture, and from time to time will perform or cause
to be performed any other act as provided by law and will execute or cause to be
executed any and all continuation statements and further instruments necessary
for such publication, perfection, and protection. Except to the extent it is
exempt therefrom, the Company will pay or cause to be paid all filing,
registration and recording fees incident to the preparation, execution and
acknowledgement of such instruments of further assurance, and all federal or
state fees and other similar fees, duties, imposts, assessments and charges
arising out of or in connection with the execution and delivery of this Loan
Agreement and the Indenture and such instruments of further assurance.

         (c) The Issuer shall have no responsibility for the preparation, filing
or recording of any instrument, document or financing statement or for the
maintenance of any security interest intended to be perfected thereby. The
Issuer will execute such instruments as may be necessary in connection with such
filing or recording.

         Section 8.09. Authorized Issuer Representative. Unless otherwise
specified herein, whenever under the provisions hereof the approval of the
Issuer is required or the Issuer is required to take some action at the request
of the Company, such approval shall be made or such action shall be by the
Authorized Issuer Representative; and the Company and/or the Trustee shall be
authorized to act on any such approval or action and the Issuer shall have no
complaint against the Company and/or the Trustee as a result of any such action
taken.

         Section 8.10. Authorized Company Representative. Unless otherwise
specified herein, whenever under the provisions hereof the approval of the
Company is required or the Company is required to take some action at the
request of the Issuer, such approval shall be made or such action shall be taken
by the Authorized Company Representative; and the Issuer and/or the Trustee
shall be authorized to act on any such approval or action and the Company shall
have no complaint against the Issuer and/or the Trustee as a result of any such
action taken.




                                     - 23 -
<PAGE>

                                   ARTICLE IX

                         ASSIGNMENT, LEASING AND SELLING

         Section 9.01. Conditions. The Company's interest in the Project may,
subject to the terms and conditions of the Mortgage, upon the consent of the
Trustee, be sold or assigned in whole or in part, and the Project may be leased
as a whole or in part (whether a specific element or unit or an undivided
interest), by the Company, subject, however, to the conditions that (i) no
assignment (other than pursuant to Section 8.01 hereof) or lease shall relieve
the Company from primary liability for any of its obligations hereunder, and in
the event of any such assignment or lease the Company shall remain primarily
liable for payment of the Loan Payments and for performance and observance of
the other agreements on its part herein provided to be performed and observed by
it, (ii) the assignee or lessee shall assume the obligations of the Company
hereunder to the extent of the interest assigned or leased, (iii) the Company
shall, within thirty (30) days after delivery thereof, furnish or cause to be
furnished to the Issuer and to the Trustee a true and complete copy of each such
assignment or lease, as the case may be, (iv) the Company shall have delivered
to the Trustee an opinion of counsel to the Company that such assignment, sale,
or lease complies with the provisions of this Section 9.01, and (v) prior to the
execution of any such assignment, sale, or lease, the Company shall furnish to
the Trustee an opinion of Bond Counsel to the effect that such assignment, sale,
or lease will not result in the occurrence of, or provide the basis for the
occurrence of, a Determination of Taxability. Any agreement between the Company
and the Issuer with respect to payments in lieu of ad valorem taxes owed, to the
Issuer shall not be a part of any assignment, lease or sale thereunder, without
the written consent of the Issuer.

         Section 9.02. Instruments Furnished to Trustee. The Company shall,
within fifteen (15) days after the delivery thereof, furnish to the Issuer and
the Trustee a true and complete copy of the agreements or other documents
effectuating any assignment, lease, or sale under Section 8.01 and Section 9.01
hereof.

         Section 9.03. Limitation. This Loan Agreement shall not be assigned nor
shall the Project be leased or sold, in whole or in part, xcept as provided in
this Article IX or in Sections 6.02 or 8.01 hereof.


                                     - 24 -
<PAGE>

                                    ARTICLE X

                         EVENTS OF DEFAULT AND REMEDIES

         Section 10.01. Events of Default. Each of the following events shall
constitute and is referred to in this Loan Agreement as an Event of Default:

         (a) a failure by the Company to make when due any Loan Payment, which
failure shall have resulted in an Event of Default under clause (a) or (b) of
Section 10.01 of the Indenture; or

         (b) a failure by the Company (i) to pay when due any amount required to
be paid under this Loan Agreement (other than referred to in Section 10.01(a)
hereof) or (ii) to observe and perform any covenant, condition or agreement on
its part to be observed or performed (other than a failure described in Section
10.01(a) hereof), which failure shall continue for a period of thirty (30) days
after written notice, specifying such failure and requesting that it be
remedied, shall have been given to the Company by the Trustee or to the Company
and the Trustee by the Issuer, provided, however, that if such failure cannot
reasonably be cured within such thirty (30) day period, the Company shall have a
reasonable period of time to remedy such failure if the Company notifies the
Issuer and the Trustee of the manner in which the failure shall be cured and if
appropriate corrective action is instituted within the initial thirty (30) day
period and is diligently pursued thereafter, and provided further that, except
in the case of fraud, failure by the Company to observe the representation and
warranty specified in Subsection 2.02(1) hereof shall not constitute an Event of
Default hereunder; or

         (c) the Company shall commence a voluntary case or other proceeding
seeking liquidation, reorganization or other relief with respect to itself or
its debts under any bankruptcy, insolvency or other similar law now or hereafter
in effect or seeking the appointment of a trustee, receiver, liquidator,
custodian or other similar official of it or any substantial part of its
property, or shall consent to any such relief or to the appointment of or taking
possession by any such official in an involuntary case or other proceeding
commenced against it, or shall make a general assignment for the benefit of
creditors, or shall fail generally to pay its debts as they become due, or shall
take any action to authorize any of the foregoing; or

         (d) an involuntary case or other proceeding shall be commenced against
the Company seeking liquidation, reorganization or other relief with respect to
it or its debts under any bankruptcy, insolvency or other similar law now or
hereafter in effect or seeking the appointment of a trustee, receiver,
liquidator, custodian or other similar official of it or any substantial part of
its property, and such involuntary case or other proceeding shall remain
undismissed and unstayed for a period of ninety (90) days; or

         (e) An event of default shall occur under the Indenture.


                                     - 25 -
<PAGE>

         Upon occurrence of an Event of Default under Section 10.01(c) or
Section 10.01(d), the Company shall immediately notify the Issuer and the
Trustee in writing of such Event of Default.

         Section 10.02. Force Majeure. The provisions of Section 10.01(b)(ii)
hereof are subject to the following limitations: If by reason of acts of God;
strikes, lockouts or other industrial disturbances; acts of public enemies;
orders of any kind of the government of the United States of America or of the
State, or any department, agency, political subdivision, court or official of
any of them, or any civil or military authority; insurrections; riots;
epidemics; landslides; lightning; earthquakes; volcanoes; fires; hurricanes;
tornados; storms; floods; washouts; droughts; arrests; restraint of government
and people; civil disturbances; explosions; breakage or accident to machinery;
partial or entire failure of utilities; or any case or event not reasonably
within the control of the Company, the Company is unable in whole or in part to
carry out any one or more of its agreements or obligations contained herein,
other than its obligations under Sections 5.01, 5.02, 6.05 and 8.01 hereof,
Company shall not be deemed in default by reason of not carrying out said
agreement or agreements or performing said obligation or obligations during the
continuance of such inability. The Company shall make reasonable effort to
remedy with all reasonable dispatch the cause or causes preventing it from
carrying out its agreements; provided, that the settlement or strikes, lockouts
and other industrial disturbances shall be entirely within the discretion of the
Company, and the Company shall not be required to settle strikes, lockouts and
other industrial disturbances by acceding to the demands of the opposing party
or parties when such course is in the judgment of the Company unfavorable to the
Company.

         Section 10.03. Remedies.

         (a) Upon the occurrence and continuance of any Event default described
in Section 10.01 hereof, and further upon the condition that, in accordance with
the terms of the Indenture, the Bonds shall have been declared to be due
immediately and payable pursuant to any provision of the Indenture, all
installments of the Loan Payments shall, without further action, become and be
immediately due and payable.

         Any waiver of any "Event of Default" under the Indenture and a
rescission and annulment of its consequences shall constitute a waiver of the
corresponding Event or Events of Default under this Loan Agreement and a
rescission and annulment of the consequences thereof.

         (b) Upon the occurrence and continuance of any Event of Default, the
Trustee or the Issuer may take any action at law or in equity to collect any
payments then due and thereafter to become due, or to enforce performance and
observance of any obligation, agreement or covenant of the company hereunder.

         (c) Any amounts collected from the Company pursuant to this Section
10.03 shall be applied in accordance with the Indenture.

                                     - 26 -
<PAGE>

         Section 10.04. Remedy Exclusive. No remedy conferred upon or reserved
to the Issuer or the Trustee hereby is intended to be exclusive of any other
available remedy or remedies, but each and every such remedy shall be cumulative
and, shall be in addition to every other remedy given hereunder or now or
hereafter existing at law or in equity or by statute. No delay or omission to
exercise any right or power accruing upon any default shall impair any such
right or power or shall be construed to be a waiver thereof, but any such right
or power may be exercised from time to time and as often as may be deemed
expedient. In order to entitle the Issuer or they, Trustee to exercise any,
remedy reserved to it in this Article X, it shall not be necessary to give any
notice, other than such notice as may be herein expressly required.

         Section 10.05. Reimbursement of Attorneys' Fees. If the, Company shall
default under any of the provisions hereof and the Issuer or the Trustee shall
employ attorneys or incur other reasonable expenses for the collection of
payments due hereunder or for the enforcement of performance or observance of
any obligation or agreement on the part of the Company contained herein, the
Company will upon demand therefor reimburse the Issuer or the Trustee, as the
case may be, for the reasonable fees of such attorneys and such other reasonable
expenses so incurred.

         Section 10.06. Waiver of Breach. In the event any obligation created
hereby shall be breached by either of the parties and such breach shall
thereafter be waived by the other party, shall such waiver shall be limited to
the particular breach so waived and shall not be deemed to waive any other
breach hereunder. In view of the assignment of certain of the Issuer's rights
and interest hereunder to the Trustee, the Issuer shall have no power to waive
any default hereunder by the Company in respect of such rights and interest
without the consent of the Trustee and the Trustee may exercise any of the
rights of the Issuer hereunder.


                                     - 27 -
<PAGE>

                                   ARTICLE XI

                           OPTIONS IN FAVOR OF COMPANY

         Section 11.01. Option to Prepay Loan Payments.

         (a) During the Variable Rate Period, the Company shall have, and is
granted the option to prepay all or any portion of the unpaid balance of the
Loan Payments, together with any interest thereon, on any Variable Period
Interest Payment Date by taking or causing the Issuer to take the actions
required to redeem in whole or in part the principal amount of the Bonds to be
redeemed and to pay the interest accrued thereon to the date of redemption
pursuant to Section 3.01(a)(i) of the Indenture, but only to the extent the
Bonds are subject to such redemption as provided therein.

         (b) The Company shall have, and is granted, the option to prepay all or
any portion of the unpaid balance of the loan Payments, together with any
interest and premium, if any, thereon, at any time by taking or causing the
Issuer to take the actions required to redeem in whole or in part the principal
amount of the Bonds to be redeemed and to pay the premium, if any, and the
interest accrued thereon to the date of redemption pursuant to Section
3.01(a)(ii) or 3.01(f) (as provided therein) of the Indenture; provided,
however, that no such redemption pursuant to Section 3.01(a)(ii) may be effected
prior to the times set forth in Section 3.01(a)(ii) of the Indenture; and
provided further, however, that no such redemption pursuant to Section 3(a)(ii)
of the Indenture may be effected from and after a Determination of Taxability.

         (c) To exercise any option under this Section 11.01 to repay the Loan
Payments, the Company shall give the Issuer, the Trustee and the Bank a notice
designating the principal amount of the Bonds to be redeemed, or for the payment
or redemption of which provision is to be made, and, in the case of redemption
of Bonds, or provision therefor, specifying the date of redemption, which shall
not be less than twenty-eight (28) days from the date such notice is given. Such
notice shall not be revocable by the Company at any time prior to the time at
which the Bonds to be redeemed or for the payment or redemption of which
provision is to be made, are first deemed paid in accordance with Article IX of
the Indenture.

         (d) The Company shall furnish to the Trustee any moneys required by the
Indenture to be deposited with the Trustee or otherwise paid by the Issuer in
connection with any of the foregoing purposes.

                  Section 11.02.   [INTENTIONALLY OMITTED].

                  Section 11.03.   [INTENTIONALLY OMITTED].

                  Section 11.04. Compliance with the Indenture. Anything in
this Loan Agreement to the contrary notwithstanding, the Issuer and the Company
shall take all actions required by this Loan Agreement and the Indenture in
order to comply with the provisions of the Indenture.


                                     - 28 -
<PAGE>

                                  ARTICLE XII

                     OBLIGATION TO ACCELERATE LOAN PAYMENTS

         Section 12.01. Determination of Taxability. As provided in Section 5.02
hereof, the Company shall be obligated and agrees to accelerate the amount of
Loan Payments payable hereunder as is determined by the Trustee to be sufficient
to redeem the Bonds in whole or (if the redemption of part of the Bonds will
preserve the federal income tax exemption of the interest on the remainder of
the Bonds as determined by Bond Counsel) in part, upon the, making of a final
determination by the Internal Revenue Service or a court of competent
jurisdiction as a result of a proceeding in which the Company participates to
the degree it deems sufficient, which determination the Company may not contest
for any reason or, in discretion, does not contest in a timely manner by an
appropriate proceeding, that the interest payable on the Bonds or any of them is
includable for federal income tax purposes in the gross income of any Owner of a
Bond, other than an Owner who is a "substantial user" of the Project or a
"related person" within the meaning of Section 147 of the Code (a "Determination
of Taxability").

         Upon the occurrence of a Determination of Taxability, the Bonds shall
be redeemed in whole unless, in the opinion of Bond Counsel, redemption of a
portion of the Bonds Outstanding would have the result that interest payable on
the Bonds remaining Outstanding after such redemption would not be includable in
the gross income for federal tax purposes of an Owner of a Bond (other than an
Owner who is a "substantial user" of the Project or a "related person" within
the meaning of Section 147 of the Code). In such event, the Bonds to be redeemed
(in the principal amount of $100,000 or any integral multiple of $5,000 in
excess thereof) shall be selected by the Trustee as provided in the Indenture in
such manner as the Trustee shall in its sole discretion deem fair and
appropriate, in such amount as is deemed necessary in the opinion of Bond
Counsel to accomplish that result.

         The redemption described above shall occur at any time not more than
(180) days after receipt by the company of the notice of the final determination
described above. All Loan Payments payable under this Article XII shall become
due and payable on the date fixed for the redemption of such Bonds. The Company
agrees that, immediately after receipt by it of notice of either a ruling or
court decision to the effect mentioned above, it will inform in writing the
Trustee, the Issuer and the Bank that it has received such notice.


                                     - 29 -
<PAGE>

                                  ARTICLE XIII

                                  MISCELLANEOUS

         Section 13.01. [INTENTIONALLY OMITTED].

         Section 13.02. Notices. Except as otherwise provided in this Loan
Agreement, all notices, certificates, requests, requisitions and other
communications hereunder shall be in writing and shall be sufficiently given and
shall be deemed given when mailed by registered mail, postage prepaid, addressed
as follows: if to the Issuer at 309 South Washington Street, Maryville,
Tennessee 37801 Attention: William A. Dunavant, Jr.; if to the Bank, to the
address designated in the Letter of Credit; if to the Company, at 200 Park
Avenue, New York, New York 10166-0130, Attention: Yasuo Terashima, with a copy
to the address when issued of the Project; if to the Trustee, at 277 Park
Avenue, New York, New York 10172-0121, Attention: Shinichi Hashimoto; if to the
Remarketing Agent, at such addresses as shall be designated by it in the
Remarketing Agreement. Any of the foregoing may, by notice given her under,
designate any further or different addresses to which subsequent notices,
certificates, requests or other communications shall be sent.

         Section 13.03. Parties in Interest. This Loan Agreement shall inure to
the benefit of and shall be binding upon the Issuer, the Company and their
respective successors and assigns, and shall inure to the benefit of the
Trustee, the Registrar, the Paying Agent and the Tender Agent, and no other
person, firm or corporation shall have any right, remedy or claim under or by
reason of this Loan Agreement except as provided in Sections 6.03 and 6.04
hereof; provided, however, that the liability of the Issuer hereunder and under
the Bonds is strictly limited as provided in the Act and the obligations of the
Issuer under the Bonds do not constitute general obligations of the Issuer. The
obligations of the Issuer under this Loan Agreement are special, limited
obligations of the Issuer, payable solely out of the revenues and income derived
under this Loan Agreement and as otherwise provided under this Loan Agreement
and the Indenture. The obligations of the Issuer hereunder shall not be deemed,
to constitute an indebtedness or an obligation of the Issuer, the State or any
political subdivision thereof within the purview of any constitutional
limitation or statutory provision, or a charge against the credit or general
taxing powers, if any, of any of them.

         Section 13.04. Amendments. This Loan Agreement may be amended only by
written agreements of the parties hereto, subject to the imitations set forth
herein and in the Indenture.

         Section 13.05. Counterparts. This Loan Agreement may be executed in any
number of counterparts, each of which, when so executed and delivered, shall be
an original; but such counterparts shall together constitute but one and the
same Loan Agreement.

         Section 13.06. Severability. If any provision of this Loan Agreement
shall be held or deemed to be or shall, in fact, be illegal, inoperative or
unenforceable,


                                     - 30 -
<PAGE>

the same shall not affect any other provisions herein contained or render the
same invalid, inoperative, or unenforceable to any extent whatever; provided
that no holding or invalidity shall require the Issuer to make any payments from
revenues other than those derived from this Loan Agreement and the Loan Payments
pledged under the Indenture.

         Section 13.07. Governing Law. The laws of the State shall govern the
validity, construction and performance of this Loan Agreement.

         Section 13.08. Company, Trustee and Issuer May Rely on Authorized
Representatives. Whenever under the provisions of this Loan Agreement the
approval of the Company is required or the Issuer or the Trustee is required to
take some action at the request of the Company, such approval shall be given or
such request shall be made by the Authorized Company Representative unless
otherwise specified in this Loan Agreement, and the Issuer and the Trustee shall
be authorized to act on any such approval or request and the Company shall have
no complaint or recourse against the Issuer and the Trustee as a result of any
such action taken. Whenever under the provisions of this Loan Agreement the
approval of the Issuer is required or the Company or the Trustee is required to
take some action at the request of the Issuer, such approval shall be given or
such request shall be made by the Authorized Issuer Representative unless
otherwise specified in this Loan Agreement, and the Company and the Trustee
shall be authorized to act on any such approval or request and the Issuer shall
no complaint or recourse against the Company and the Trustee as a result of any
such action taken; provided, however, that nothing in this Section 13.08 shall
be construed to impair the rights of the Trustee, as assignees of the Issuer or
otherwise, hereunder.

         Section 13.09. Limited Liability of Officers, Etc. No recourse shall be
had for the payment of the principal of, redemption premium, if any, and
interest on any of the Bonds or for any claim based thereon or upon any
obligation, covenant or agreement contained in the Indenture, this Loan
Agreement or the Bond Purchase Agreement against any past, present or future
member, officer, agent or employee of the Issuer, or any incorporator, member,
officer, employee, director or trustee of any successor corporation, as such,
either directly or through the Issuer or any successor corporation, assessment
or penalty or otherwise, and all such liability of any such incorporator,
member, officer, employee, director, agent or trustee is hereby expressly waived
and released as a condition of and consideration for the execution of the
Indenture or this Loan Agreement and the issuance of the Bonds.


                                     - 31 -
<PAGE>

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

<TABLE>
                                                                        THE INDUSTRIAL DEVELOPMENT
ATTEST:                                                                 BOARD OF BLOUNT COUNTY,
                                                                        TENNESSEE

<S>                                                                     <C>
By:  /s/ Fred R. Lawson                                                 By:  /s/ Steve West
    -----------------------------------                                -------------------------------------
           Secretary           [Title]                                           Chairman            [Title]


                                                                        ADVANCED CRYSTAL TECHNOLOGY,
                                                                        INC. (ACT, INC.)


                                                                        By:  /s/ Katsuhiko Hayaski
                                                                        ------------------------------------
                                                                                     President       [Title]
</TABLE>


                                     - 32 -
<PAGE>

                                    EXHIBIT A

                                   THE PROJECT

         The Project consists of the acquisition of approximately 7.805 acres of
land and the construction and equipping of a 16,200 square foot manufacturing
facility for the manufacture of single crystal and related optical components to
be located on or near 3100 Stock Creek Boulevard in the Stock Creek Industrial
Centre in Blount County, Tennessee, which includes all real and personal
property described in the Deed of Trust and Security Agreement.



                                     - 33 -
<PAGE>

                                    EXHIBIT B

                                THE PROJECT SITE

         SITUATED IN District No. Eleven (11) of Blount County, Tennessee, and
being in the Stock Creek Development Centre, and described more particularly as
follows:

         BEGINNING at a point in the easterly edge of the right of way for Stock
         Creek Boulevard, said point of beginning being the northwest corner of
         the tract conveyed hereby, and being marked by a concrete monument;
         thence the following calls and distances along the line of the
         remaining property of Blount County: (1) N. 63-31-19 E. 548.38 feet to
         a concrete monument; (2) s. 38-21-42 E. 583.59 feet to a concrete
         monument; (3a) S. 68-24-28 W. 659.77 feet to a concrete monument; (3b)
         N. 75-25-10 W. 1141.49 feet to a concrete monument in the easterly edge
         of the right of way for Stock Creek Boulevard, said monument being
         located approximately 4,259.19 feet in an easterly direction from the
         center line of Tennessee State Highway No. 33, measured along the
         southerly and easterly line of Stock Creek Boulevard; thence in a
         (northerly direction along the easterly edge of the right of way for
         Stock Creek Boulevard the following two calls: (4a) along the arc of a
         curve to the left (said arc having a radius of 388.31 feet), an arc
         distance of 278.27 feet (chord distance and direction: N. 05-56-55 W.
         272.35 feet); (4b) N. 26-28-41 W. 166.90 feet to the point of
         BEGINNING, and containing 7.805 acres, more or less, as surveyed on or
         about May 16, 1988, by Billy G. Knight, Tennessee Registered Land
         Surveyor No. 1375, a copy of said survey being attached and
         incorporated herein by this reference as Exhibit A hereto.

         This conveyance is made subject to the following:

         1.       There is reserved by Grantor for the use and benefit of the
                  Knox-Chapman Utility District, and/or its successors and
                  assigns, a perpetual easement for the maintenance and
                  replacement of the existing water main which is located in the
                  southeast portion of the above described tract near the
                  southern boundary lie (sic) as shown on said plat of survey;
                  said easement is twenty (20) feet in width, ten (10) feet on
                  each side of the said existing water main.

         2.       This property is subject to the Declaration of Covenants,
                  Conditions and Restrictions applicable to Stock Creek
                  Development Centre, duly adopted by the Board of County
                  Commissioners of Blount County, Tennessee on April 21, 1986,
                  and of record in Misc. Record Book 77, beginning at page 31,
                  in the Register's office for said County; said Declaration is
                  incorporated herein by, this reference, and Grantee, by
                  accepting


                                     - 34 -
<PAGE>

                  this deed (a) acknowledges receipt of a copy of said
                  Declaration and of the Design Guidelines referred to therein,
                  and (b) agrees to be bound thereby.

         3.       Grantee, by accepting this Deed, also agrees to promptly begin
                  construction of a manufacturing facility on the above
                  described land, and that should it fail to do so within twelve
                  (12) months from the date hereof, that Grantor shall have the
                  right and option to repurchase said property from Grantee at
                  the same price set forth hereinabove; this option shall begin
                  twelve (12) months from the date of this deed, if, but only
                  if, said construction has not begun, and if so begun, shall
                  expire two (2) months thereafter.

                  BEING AND INTENDING TO BE a part of Stock Creek Development
  Centre, and a part only of the property conveyed by Blount County to Advanced
  Crystal Technology, Inc. (ACT, Inc.) by deed dated June , 1988, recorded in
  Book of Deeds Vol. ______, page _______, in the Register's Office for Blount
  County, Tennessee.

                                     - 35 -
<PAGE>

                                    EXHIBIT C

                                   $5,000,000

                        The Industrial Development Board
                           of Blount County, Tennessee
                Industrial Development Revenue Bonds, Series 1988
             (Advanced Crystal Technology, Inc. (ACT, Inc.) Project)


                       REQUISITION ______________________

         This Requisition is made pursuant to the Loan Agreement (the "Loan
Agreement") dated as of August 1, 1988, between The Industrial Development Board
of Blount County, Tennessee, and Advanced Crystal Technology, Inc. (ACT, Inc.)
(the "Company"), relating to the above-captioned Bond issue. All terms used
herein shall have the meanings assigned to them such Loan Agreement.

To:      Mitsui Finance Trust Company of New York,, as Trustee

         Please pay from the Project Fund

to                               at                                      , the
   -----------------------------    ------------------------------------
sum of $
        -----------------------------------------
..

         In connection with this request, the undersigned hereby CERTIFIES:

         (1) that an obligation in the stated amount has been incurred, has been
paid or is currently payable, is a proper charge against the Project Fund and
has not been the basis of any previous withdrawal from the Project Fund;

         (2) that the purpose and circumstances of such obligations are as
follows: See Exhibit A attached;

         (3) that the Company has no knowledge of any vendors', mechanics', or
other liens or rights to liens which have not been disclosed to the Trustee and
the Bank, nor of any such liens or rights to liens which should be satisfied or
discharged before payment of such obligation is made;

         (4) that insofar as such obligation was incurred for labor, services,
materials or equipment in connection with the requisition, construction,
installation and equipping of the Project, such labor and services were actually
performed, and such materials and equipment were actually used or installed, in
connection with the acquisition, construction, installation and equipping of the
Project; and

                                     - 36 -
<PAGE>

         (5) that no Event of Default has occurred.

                                             ----------------------------------
                                             Authorized Company Representative
                                              Date:
                                                   ----------------------------

                                     - 37 -