Document:

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                                                                    Exhibit 10.6

                              (Summary Translation)

                              COOPERATION AGREEMENT

                                     Between
                      Jiangxi LDK Solar Hi-Tech Co., Ltd.
                                       And
                          Shanghai Jiaotong University

                              For the Establishment
                                       of
                Shanghai Jiaotong University LDK Solar Laboratory

                                October 10, 2005

<PAGE>

     This Agreement is made as of October 10, 2005 by and between Jiangxi LDK
Solar Hi-Tech Co., Ltd. at High-Tech Industrial Park, Xinyu City, Jiangxi
Province, China (herein "Party A") and Shanghai Jiaotong University at 1954
Huashan Road, Shanghai (herein "Party B").

     Through friendly negotiations, Party A and Party B have reached the
following agreement on the establishment of Shanghai Jiaotong University LDK
Solar Laboratory.

                         ARTICLE 1. COOPERATION CONTENT

     Party A and Party B shall jointly establish a solar energy laboratory
within the premises of Shanghai Jiaotong University. The name of the laboratory
shall be "Shanghai Jiaotong University LDK Solar Laboratory" (herein "LDK
Laboratory").

                          ARTICLE 2. COOPERATION TARGET

     Both parties shall endeavor to make the LDK Laboratory a base for
implementing their manufacturing, learning and research objectives.
Specifically, the LDK Laboratory will support (i) Party B in its application to
Shanghai municipal government and the PRC national government for its status as
a key solar energy research center and (ii) Party A in the implementation of its
commercialization plan to reach 200 MW solargrade multicrystalline wafer
production.

     Party B will provide technical support to Party A in its implementation of
the commercialization plan to reach 200 MW solargrade multicrystalline wafer
production. Both parties will jointly adapt and digest advanced equipment and
technology imported from overseas and engage in further research and development
to achieve the following targets:

(1)  Technology Adaptation

     1)   Cleaning and Etching Technology

          (1)  Master the approaches for analyzing and sorting silicon feedstock
               of different quality;

          (2)  Master the chemical mixture and etching process for cleaning
               different silicon feedstock;

          (3)  Master the operating guidelines, procedures and trouble-shooting
               methodologies for etching equipment; and

          (4)  Master the evaluation and quality control of cleaning and etching
               results.

     2)   Crystallization Technology

          (1)  Master the operating guidelines, structural designs,
               functionalities, control systems and trouble-shooting
               methodologies for the DSS furnaces;

          (2)  Master the feedstock charging procedures and different charging
               approaches;

          (3)  Master the cleaning, the mould release agents coating and the
               installation of new crucibles;

          (4)  Master the safety operating procedures and understand the
               rationale behind each operating procedure to insure safety of
               operations;

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          (5)  Master the design and control of electricity, air, water and
               heater systems;

          (6)  Master the evaluation and quality control of the ingots produced;
               and

          (7)  Master the maintenance of the equipment and replacement of spare
               parts.

     3)   Wafering Technology

          (1)  Master the operating guidelines, structural design and
               functionalities of the multi-wire saws;

          (2)  Master the loading and unloading of bricks, the installing and
               changing of the wire web, the slurry mixing and wire sawing
               technique;

          (3)  Master the control over wafer thickness, wafer surface quality
               and wafer yield;

          (4)  Master the problem detection, trouble shooting and maintenance of
               the equipment; and

          (5)  Master the quality measurement, analysis and evaluation of
               wafers.

(2)  Technology Development

     1)   Cleaning and Etching

          (1)  Research and develop methodologies for inspecting different types
               of silicon feedstock;

          (2)  Optimize etching solution and cleaning process (including ways to
               improve cleaning and etching quality, to enhance efficiency, to
               reduce solution consumption, to reduce power consumption in
               etching process, to increase etching scope and to improve
               operating capability and safety during the etching process);

          (3)  Develop and enhance etching equipment (including structural
               enhancement and process enhancement);

          (4)  Recycle and safely utilize cleaning/etching acid; and

          (5)  Localize the manufacturing of consumables for cleaning and
               etching.

     2)   Crystallization Technology

          (1)  Research and develop low-cost crucibles and recyclability of
               crucibles;

          (2)  Research and develop ways to increase ingot weight;

          (3)  Research the relationship between ingot lifetime and
               crystallization process optimization;

          (4)  Research silicon feedstock mixing optimization;

          (5)  Research ways to reduce power consumption for crystallization
               process;

          (6)  Research ways to speedily evaluate ingot quality;

          (7)  Research new DSS furnaces (with larger volume, better quality,
               less power consumption and higher efficiency); and

          (8)  Research ways to localize the manufacturing of new mould release
               agents and crystallization-related consumables.

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     3)   Wafering Technology

          (1)  Research ways to localize the manufacturing of wafering
               consumables (including wires, pulleys, glue, SiC and others);

          (2)  Research and develop ways to recycle wafering related raw
               materials and consumables;

          (3)  Research ways to speedily evaluate wafering quality;

          (4)  Research and develop ways to reduce wafer breakage and kerfing;

          (5)  Research with respect to ultra-thin wafer sawing; and

          (6)  Research with respect to ultra-thin wafer cleaning and packaging.

          ARTICLE 3. ADMINISTRATIVE RELATIONSHIP OF THE LDK LABORATORY

     The LDK Laboratory is subject to the administrative jurisdiction of
Shanghai Jiaotong University.

              ARTICLE 4. MANAGEMENT STRUCTURE OF THE LDK LABORATORY

     The LDK Laboratory will be managed by its director under the leadership of
a managing board. The initial managing board will consist of three members from
Party A: Mr. Peng Xiaofeng, Mr. Tong Xingxue and Mr. Shao Yonggang and four
members from Party B: Mr. Xie Shenwu, Mr. Peng Yinghong, Mr. Ye Qinghao and Mr.
Cui Rongqiang. Each member will serve a term of two years. Professor Xie Shenwu,
President of placeCityShanghai Jiaotong University will be the chairman of the
initial managing board and Mr. Peng Xiaofeng, chairman of Jiangxi LDK Solar
Hi-Tech Co,. Ltd. will be a vice chairman of the initial managing board. Both
the chairman and vice chairman will serve a term of two years. The director of
the LDK Laboratory will be elected by both parties, subject to nomination by
Party B and consent by Party A. The initial director of the LDK Laboratory will
be Professor Cui Rongqiang for a term of two years.

                ARTICLE 5. WORKING CAPITAL OF THE LDK LABORATORY

       Party A will fund Rmb 5,000,000 for the first phase operations of the LDK
Laboratory, with the funds to be disbursed in line with the progress and
development of the various research and development projects. Funding for the
second phase operations of the LDK Laboratory will be determined by the parties
on the basis of the results of the first phase. Party A will remit an initial
payment of Rmb 1,000,000 (or 20% of its first phase funding commitment) to the
account of Party B within one week after this Agreement becomes effective.

                  ARTICLE 6. FUNDS FOR RESEARCH AND DEVELOPMENT

     The LDK Laboratory will report to both parties with respect to the subjects
or topics of its research and development in order for Party A to provide
funding for such research and development in a timely manner. Party A will have
priority in proposing the subjects or topics for research and development by the
LDK Laboratory.

                   ARTICLE 7. FACILITIES OF THE LDK LABORATORY

     Party B will provide laboratory facilities (including offices) and research
and development equipment and resources (including office equipment and
resources) to the LDK Laboratory. Party A will make its existing resources
available to the LDK Laboratory for its research and development.

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         ARTICLE 8. OWNERSHIP OF RESEARCH RESULTS AND COMMERCIALIZATION

     The research results of the LDK Laboratory will be jointly owned by Party A
and Party B. Party A will have priority in utilizing any research results of the
LDK Laboratory. The economic benefits will be shared between Party A (40%) and
Party B (30%), with the remaining 30% as re-investment from Party A into the LDK
Laboratory. Any transfer of research results of the LDK Laboratory to a third
party will require joint approval from Party A and Party B. In addition, Party A
agrees that Party B will lead in any joint application for research and
development awards and funding.

     Party B agrees to make two of its patented technologies available to Party
A to use, free of charge. These technologies are (i) impulse lamp-house signal
solar cell measurement technology (with patent number: ZL01113030.X) and (ii)
transparent conductive thin film and spay deposition antireflection equipment
and method (with patent number: ZL99116819.4).

                         ARTICLE 9. PARTY A'S R&D CENTER

     The LDK Laboratory will assist Party A in (i) establishing its solar R&D
center in Jiangxi Province, (ii) applying for provincial, ministerial and
national research funding allowances and (iii) training research and development
personnel. All related expenditures will be funded by funds for research and
development under Article 6.

                       ARTICLE 10. INTERNSHIP AND TRAINING

     Party A will provide the LDK Laboratory with internship opportunities and
the LDK Laboratory will provide Party A with training facilities.

                   ARTICLE 11. REPRESENTATIONS AND WARRANTIES

     (1) Each party represents, warrants and covenants to the other party as
follows (each effective upon the signing of this Agreement):

     1)   The obligations undertaken by each party pursuant to this Agreement
          are legal and will not conflict with its obligations under any other
          agreement or document and will not contravene any laws, rules and
          regulations in China; and

     2)   Each party shall perform its obligations under this Agreement in
          compliance with the laws, rules and regulations of China.

     (2) Each party shall notify the other party promptly and shall take all
reasonable measures to remedy or cure as requested by the other party upon the
occurrence of any event or the existence of any circumstance that would result
in any of its representations, warranties and covenants becoming untrue or
inaccurate.

     (3) Neither party may transfer its rights and obligations under this
Agreement.
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                            ARTICLE 12. FORCE MAJEURE

     (1) No party shall be liable for non-performance or partial non-performance
of its obligations under this Agreement to the extent that such non-performance
or partial non-performance is caused by force majeure and not by any fault of
such party; provided, however, that such party shall be obligated to take all
necessary measures, conditions permitting, to mitigate the losses so caused.

     (2) The party that is prevented from performing this Agreement due to force
majeure shall notify the other party in writing as soon as practicable upon the
occurrence of force majeure and shall submit a report to the other party within
15 days of the occurrence of such force majeure, setting forth therein its
reasons for non-performance or partial non-performance and for the need to delay
its performance.

                               ARTICLE 13. DEFAULT

     Upon effectiveness of this Agreement, if any party shall default in its
performance of its obligations hereunder and causes the performance of this
Agreement impossible, unless due to force majeure as described in Article 12,
such party shall pay Rmb 100,000 to the other party as liquidated damages.

                             ARTICLE 14. TERMINATION

     (1) Each party shall have the right to terminate this Agreement upon the
occurrence of any of the following, after notice in writing to the other party:

     1)   The other party has breached or has not performed any of its
          obligations under this Agreement; or

     2)   Any representation, warranty or covenant is materially untrue and
          misleading or remains unperformed, regardless of its cause or reason.

     (2) When this Agreement is terminated due to causes under Article 14(1),
the obligations of the parties shall terminate forthwith; provided, however,
that such termination shall not affect any pre-existing rights and claims of the
parties or any liabilities for damages as a result of the termination of this
Agreement due to causes under Article 14(1).

                         ARTICLE 15. DISPUTE RESOLUTION

     Settlement of any dispute in connection with this Agreement shall first be
sought through friendly negotiations, failing which, either party may submit the
dispute to a court with jurisdiction for settlement.

                      ARTICLE 16. AMENDMENT AND SUPPLEMENT

     Any amendment and supplement to this Agreement shall be valid only if made
out in writing and duly signed by both parties.

                              ARTICLE 17. VALIDITY

     This Agreement shall come into effect upon signing by the respective duly
authorized representatives of the parties, with corporate seals attached
hereunto. Thereafter, this Agreement shall remain valid for five years.

                            ARTICLE 18. COUNTERPARTS

     This Agreement is made in four original counterparts, with two for Party A
and two for Party B. Each original counterpart shall constitute one and the same
instrument.

                                    Party A: JIANGXI LDK SOLAR HI-TECH CO., LTD.
                                    (Seal)

                                    By:  /s/ Peng Xiaofeng
                                       ------------------------------------
                                    Name:  Peng Xiaofeng
                                    Title: Authorized Representative
                                    Date:  October 10, 2005

                                    Party B: SHANGHAI JIAOTONG UNIVERSITY
                                    (Seal)

                                    By:  /s/ Zheng Hang
                                       ------------------------------------
                                    Name:  Zheng Hang
                                    Title: Authorized Representative
                                    Date:  October 10, 2005<PAGE>

                                                                  Exhibit 10.7.1

                                   AGREEMENT

This Agreement is made effective as of the 21st day of June, 2005, by and
between GT Solar Technologies, a division of GT Equipment Technologies, Inc. at
243 Daniel Webster Highway, Merrimack, NH 03054 USA ("GT Solar") and Jiangxi LDK
Solar Hi-Tech Co., Ltd. at Xinyu Hi-Tech Development Zone, Xinyu City, Jiangxi,
China ("Customer").

WHEREAS, Customer wishes to buy and GT Solar wishes to sell certain solar wafer,
cell and module fabrication equipment and/or technologies more particularly
defined herein below and in the attached EXHIBITS A and B ("Equipment") and;

WHEREAS, Customer wishes to install the Equipment in Xinyu, Jiangxi, China;

WHEREAS, the parties wish to enter into this Agreement to more particularly
define the terms and conditions of the purchase and sale of such Equipment.

NOW, THEREFORE, for good and valuable considerations the parties agree as
follows:

1. EQUIPMENT. GT Solar shall sell and Customer shall purchase a PV-FAB Water
Fabrication turnkey line, more particularly described in EXHIBITS A and B
attached hereto and incorporated herein by reference. GT Solar warrants and
represents that, upon delivery to Customer pursuant to Article 3, title to the
Equipment will be free and clear and without any liens or encumbrances.

2. PURCHASE PRICE; PAYMENT TERMS. The purchase price for the Equipment and
related services ("Purchase Price") shall be Thirty-three million and one
thousand U.S. Dollars ($33,001,000 USD).

Payment terms:

2.1. Customer shall pay a deposit ("Deposit") equal to twenty percent (20%) of
the total Purchase Price by wire transfer to GT Solar's bank account in such a
way that one-sixth of the deposit amount should be done by the middle of each
month starting from July, 2005 until middle of December, 2005.

2.2. Fourteen (14) days before each payment, GT Solar will open a standby letter
of credit in the amount of the Deposit in favor of Customer against GT Solar's
failure to deliver the Equipment pursuant to the terms of this Agreement.

2.3. At 75 days prior to each shipment, GT Solar will notify the shipment amount
to Customer. No less than sixty (60) days of each shipment, Customer will
establish in favor of GT Solar an irrevocable letter of credit covering seventy
percent (70%) of the said amount of the each shipment, which is payable to GT
Solar upon presentation of shipping documents.

2.4. Ten percent (10%) of the each shipment amount will be paid by Customer to
GT Solar by wire transfer within 90 days from the said shipment here within.

3. SHIPMENT TERMS. The "Commencement Date" will be the date GT Solar receives
the Deposit. All shipments and transfer of title shall be made CIF, Nanchang.

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4. CONTRACT SERVICES. Within sixty (60) days of the Commencement Date, GT Solar
shall provide Customer a list of facilities and any other requirements such as
power, water and space for operation of the delivered Equipment. GT Solar shall
also, as part of the Purchase Price (except for room and board), provide
supervision for the unpacking and installation of the Equipment, and shall
provide support, training, and assistance to Customer's engineers and operators
per EXHIBIT C. Such assistance shall include the supervision of the
commissioning and start up of the Equipment. Customer shall provide all local
labor and support for commissioning and start up of the Equipment.

Customer shall pay the cost of all the room, board and local transportation of
GT Solar's representatives during the period of the performance of such
services.

5. CONTRACT TERM. The Term of this Agreement shall commence upon the execution
and delivery of this Agreement and shall terminate upon the acceptance of the
Equipment by Customer. The warranty and indemnification provisions set forth in
sections 9, 10, and 15 shall survive acceptance of the equipment. Projected
delivery and performance milestones is attached hereto as EXHIBIT C and
incorporated herein by reference.

6. EQUIPMENT INSPECTION AND TRAINING. Customer personnel may be present at GT
Solar, or GT's vendors' facilities, for up to eight weeks to train on the
installation, operation and maintenance of the Equipment. After training, the
Equipment will be containerized for shipment. Customer personnel will assist in
the packing of the Equipment as part of their training if present at GT Solar at
such time. GT shall be responsible for local cost of Customer's employees for
the training in the US.

7. CUSTOMER RESPONSIBILITIES. It will be Customer's responsibility to provide
the facilities and prepare the production site for installation of the Equipment
one (1) month prior to installation. Facilities preparation shall include, but
is not limited to, the provision for appropriate electrical power, compressed
air, de-ionized water, cooling water circulation systems, gas circulation
systems, exhaust, back-up cooling water systems, back-up power systems, and
effluent waste treatment (to the extent required by local laws). Facilities
requirements will be defined by GT Solar no later than 60 days after the
Commencement Date. Any delays on the part of Customer in preparation of the
building, facilities or personnel may result in a delay of the performance by GT
Solar of its obligations pursuant to this Agreement and GT Solar reserves the
right to extend its performance period and price accordingly. Customer will be
solely responsible for all permits required for the installation and operation
of the Equipment on Customer site. Customer will also be solely responsible for
furnishing the personnel necessary for the proper installation of the Equipment
at the Customer site, operational training during start up and other recommended
periods, and acceptance of the Equipment. A list of Customer supplied items is
attached as EXHIBIT D.

                                     Page 2

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8. SECURITY INTEREST. GT Solar reserves, and Customer hereby grants GT Solar, a
continuing security interest in Equipment, together with all additions,
improvements and accessories thereto made or supplied by GT Solar at any time,
and all proceeds of the foregoing, to secure payment of the Purchase Price to GT
Solar. Until receipt of final payment, Customer agrees that GT Solar shall have
the right to file or record a financing statement pursuant to applicable law to
evidence GT Solar's security interest in the Equipment and Customer will execute
such financing statements and other documents as GT Solar shall request to
perfect such interest. Customer agrees that, in the event of its failure to make
any payment required pursuant to this Agreement, it will make all Equipment
available to GT Solar upon demand and will pay all reasonable costs of GT Solar
in connection with the collection of any amounts due or other enforcement of GT
Solar's rights.

9. WARRANTY. For the earlier of (i) 15 months from the date of shipment to
Customer or (ii) one year from acceptance of the Equipment, GT Solar warrants
that all electrical and mechanical parts (except normal wear and tear on parts,
including bearings and any parts that come in contact with wires or slurry)
shall be free from defects in workmanship and materials and shall conform to GT
Solar's specifications. If any such parts are defective during the warranty
period or, upon delivery, the Equipment fails to meet the specifications set
forth in this Agreement, Customer shall inform GT Solar and GT Solar shall
either repair or replace any such items determined by GT Solar to be defective.
GT Solar's liability shall be limited to the cost of repairing and replacing
such defective items when shipped to GT Solar, freight prepaid, by Customer. The
repaired or replaced parts shall be shipped to Customer by GT Solar freight
prepaid. This warranty specifically excludes Customer's labor, Equipment
downtime, punitive, incidental or consequential damages, acts of God, or loss of
production. A purchase order from the Customer is required to initiate any
warranty action pending approval by GT Solar of the claim.

In the event that Customer has purchased Equipment from GT Solar that has been
manufactured by another manufacturer, GT Solar hereby agrees to pass through to
Customer any and all warranties without limitation made by such company.

This warranty does not extend to any Equipment that fails to operate by reason
of improper installation or operation by Customer or that has been subject to
misuse, neglect or accident or that has been repaired or materially altered
other than by GT Solar.

     THE WARRANTY SET FORTH HEREIN IS EXCLUSIVE AND IN LIEU OF ALL OTHER
     WARRANTIES, WHETHER STATUTORY, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND ALL WARRANTIES
     ARISING FROM COURSE OF DEALING OR USAGE. THE REMEDIES PROVIDED HEREIN

                                     Page 3

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     ARE CUSTOMER'S SOLE AND EXCLUSIVE REMEDIES WHETHER THE CLAIMS BY CUSTOMER
     ARE BASED IN CONTRACT, IN TORT (INCLUDING NEGLIGENCE) OR OTHERWISE.

10. INTELLECTUAL PROPERTY INDEMNIFICATION. GT Solar shall indemnify and hold
harmless Customer against any claim by any third party that the Equipment, when
used for the purpose for which it is designed and pursuant to GT Solar's
specifications, violates or infringes the patent, copyright, trademark, trade
secret or other proprietary rights of such third party.

Notwithstanding the foregoing, GT Solar shall have no obligation with respect to
claims of infringement based upon the use of the Equipment, individually or in
combination with other equipment supplied by GT Solar or others, if the
Equipment is used for any process not supplied by GT Solar. Further, GT Solar
shall have no obligation with respect to claims of infringement in the event
that the Equipment is manufactured or designed or operated in accordance with a
design, drawings or process not furnished by GT Solar.

The foregoing states the entire liability of GT Solar for any loss, liability,
or damage whatsoever to or sustained by Customer arising out of the infringement
by the Equipment of the property rights of third parties.

11. CUSTOMER TERMINATION. Customer may terminate this Agreement (other than for
default pursuant to Article 12 below) at any time by providing written notice of
such termination to GT Solar at least thirty (30) days in advance of the
proposed termination date, provided that if Customer terminates this Agreement
or any portion hereof within thirty (30) days following the Commencement Date,
GT Solar shall retain all payments due or received up to the date of the
proposed termination.

In the event that Customer terminates this Agreement between thirty-one (31) and
sixty (60) days after the Commencement Date, Customer shall pay to GT Solar
sixty percent (60%) of the Purchase Price. If the Agreement is terminated by
Customer at any time after sixty-one (61) days following the Commencement Date,
Customer shall pay to GT Solar the entire amount of the Purchase Price.

12. DEFAULT.

A. Either party may terminate this Agreement upon written notice to the other
party upon:

     (1). The failure of the other party to perform any material term, condition
or covenant of this Agreement, which failure has not been corrected within
thirty (30) days of the date of written notice of such failure given by the
other party; or

     (2). The failure of Customer to make a payment when due; or

     (3) The other party becomes insolvent or the subject of any bankruptcy
proceeding that is not dissolved within sixty (60) days.

                                     Page 4

<PAGE>

B. In the event of termination of this Agreement by GT Solar pursuant to the
terms of this Article 12, in addition to any other remedies it may have at law
or in equity, GT Solar may recover any and all monies which may be due pursuant
to Section 2 or any other provision of this Agreement and repossess any
Equipment sold hereunder for which it has not been paid. In the event of
termination by Customer pursuant to the terms of this Article 12, Customer shall
have the right to terminate the order and recover any monies previously paid by
it to GT Solar.

13. FORCE MAJEURE. GT Solar and Customer shall not be held responsible for any
delay or failure hereunder caused by fires, strikes, embargoes, government
requirements, civil or military authorities, acts of God or of the public enemy
or, if not within their reasonable control, by acts or omissions of
subcontractors, failure of transport, failure of communications, failure of
power supply or any other causes beyond their reasonable control.

14. LIMITATION OF LIABILITY. UNDER NO CIRCUMSTANCES WILL GT SOLAR BE LIABLE TO
CUSTOMER, WHETHER IN CONTRACT, IN TORT (INCLUDING NEGLIGENCE), UNDER ANY
WARRANTY OR OTHERWISE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL OR
PUNITIVE LOSS OR DAMAGE, INCLUDING LOSS OF PROFITS OR REVENUES, RESULTING FROM
OR ARISING OUT OF OR IN CONNECTION WITH GT SOLAR'S PERFORMANCE UNDER, OR BREACH
OF, THIS AGREEMENT OR THE MANUFACTURE, SALE, DELIVERY, RESALE, REPAIR OR USE OF
ANY EQUIPMENT COVERED BY OR FURNISHED PURSUANT TO THIS AGREEMENT.

15. INDEMNIFICATION. Each party agrees to defend, indemnify and hold harmless
the other party from and against any third party claims arising out of the acts
or omissions of the indemnifying party or its performance pursuant to this
Agreement. Each party's duty to defend and indemnify the other is conditional
upon timely notice by the other party of any claim for which indemnification is
sought and control by the indemnifying party of the litigation or settlement of
any indemnified claim.

16. LICENSED PROGRAMS. Computer software or other technology or know-how that,
in GT Solar's judgment, are required for the operation of the Equipment shall be
provided by GT Solar to Customer subject to such license terms as GT Solar shall
reasonably require.

In the event Customer sells, transfers or otherwise assigns its rights or
interests in the Equipment to any third party, except a parent or subsidiary
company of Customer, it is expressly understood that Customer does not have the
right to transfer licensed programs or assign the license or any rights Customer
may have regarding the use or possession of such licensed programs to such third
party without GT Solar's prior written consent and any attempted transfer or
assignment shall be void and of no force and effect.

17. GOVERNING LAW. This Agreement and any related order shall be governed and
interpreted, construed, and enforced in accordance with the laws of a neutral
country

                                     Page 5

<PAGE>

such as Sweden, its choice of laws and the Convention for the International Sale
of Goods to the contrary notwithstanding.

18. ASSIGNMENT. Neither party shall delegate any duties or assign any rights or
claims under this Agreement, other than to a parent or subsidiary company,
without the other party's prior written consent, which consent shall not be
unreasonably withheld, and any such attempt at delegation or assignment shall be
void.

19. FURTHER ASSURANCES. At any time, and from time to time after the
Commencement Date, each party will execute such additional instruments and take
such additional actions as may be reasonably requested by the other party to
confirm or perfect title to any property transferred hereunder or otherwise to
carry out the intent and purposes of this Agreement.

21. WAIVER. Any failure on the part of any party hereto to comply with any of
its obligations, agreements or conditions hereunder may only be waived in
writing by the party to whom such compliance is owed.

22. ARBITRATION. Any disputes that cannot be amicably resolved by the parties
shall be submitted to binding arbitration for resolution. The arbitration shall
be conducted before a panel of three (3) arbitrators in New Hampshire under the
rules of the American Arbitration Association. Each party shall select one
arbitrator and the two so chosen shall select the third, who shall act as
chairperson. If a party shall fail to appoint an arbitrator within twenty (20)
days after receiving written notice of the arbitration and the name of the
arbitrator selected by the party initiating the arbitration, the initiating
party may request that the American Arbitration Association appoint the second
arbitrator, and if the two arbitrators so selected fail to select a third
arbitrator within twenty (20) days after the appointment of the second
arbitrator, either arbitrator may request that the American Arbitration
Association select the third arbitrator. The decision of the majority of the
arbitrators shall be final and binding on the parties with respect to all
matters referred to the arbitration panel for decision and may be enforced in an
appropriate court in any competent jurisdiction. The arbitrators shall not have
the authority to award punitive or special damages. In the absence of a contrary
ruling by the arbitrators, each party shall pay its own costs and fees in
connection with the arbitration.

23. NOTICES. All notices and other communications hereunder shall be in writing
and shall be deemed to have been given if (i) delivered in person, (ii) sent by
prepaid first class registered or certified mail, return receipt requested, or
(iii) by delivery to the other party by recognized courier to the following
addresses:

To GT Solar:               GT Solar Technologies
                           243 Daniel Webster Highway
                           Merrimack, NH 03054 USA
                           Attn: President
                           cc: General Counsel
                           Tel: (603) 883-5200
                           Fax: (603) 598-0444

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<PAGE>

To Customer:               Jiangxi LDK Solar Hi-Tech Co., Ltd.
                           Xinyu Hi-Tech Development Zone,
                           Xinyu City, Jiangxi, China

24. EXPENSES. Whether or not the transactions contemplated hereby are
consummated, all costs and expenses incurred in connection with this Agreement
and the transactions contemplated shall be paid by the party incurring such
costs and expenses.

25. HEADINGS. The section and subsection headings in this Agreement are inserted
for convenience only and shall not affect in any way the meaning or
interpretation of this Agreement.

26. COUNTERPARTS. This Agreement may be executed simultaneously in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

27. BINDING EFFECT. This Agreement shall be binding upon the parties hereto and
inure to the benefit of the parties, their successors and permitted assigns.

28. ENTIRE AGREEMENT. This Agreement is the entire agreement of the parties with
respect to the subject matter hereof. There are no oral or written promises,
conditions, representations, understandings, interpretations or terms of any
kind as conditions or inducements to the execution hereof. This Agreement
supersedes all prior agreements, written or oral, including any memorandum of
understanding between the parties.

29. SEVERABILITY. If any part of this Agreement is deemed to be unenforceable,
the balance of this Agreement shall remain in full force and effect.

30. PRE-AGREED ITEM: GT Solar will agree to keep the similar supply schedule as
per this contract starting from May of 2006 if another expansion contract will
be signed by January of 2006 between the two parties hereby.

           THE BALANCE OF THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK

                                     Page 7

<PAGE>
IN WITNESS WHEREOF, the parties have caused this Agreement to be executed on
their behalf by their duly authorized agents as of the day and year first above
written.

Executed as of the date first written above.

<TABLE>
<S>                                                  <C>
For:  Jiangxi LDK Solar Hi-Tech Co., Ltd.            For:  GT Solar Technologies

/s/ Xiaofeng Peng                                    /s/ Kedar P. Gupta, CEO
-----------------------------                        --------------------------

Xinyu Hi-Tech Development Zone                       GT Solar Technologies
Xinyu City, Jiangxi, China                           243 Daniel Webster Highway
                                                     Merrimack, NH 03054 USA
</TABLE>

                                     Page 8

<PAGE>
                                    EXHIBIT A

                          GTs-WAFFABTM Major Equipment

<Table>
<Caption>
------------------------------------- -------------------------------------------------- ---------------------
              PROCESS                                 EQUIPMENT (sets)                        Unit Price
------------------------------------- -------------------------------------------------- ---------------------
<S>                                   <C>                                                <C>
Crucible Preparation                  GT-Crucible spray system (3),                      [*]
                                      -------------------------------------------------- ---------------------
                                      Kilns (4)                                          [*]
------------------------------------- -------------------------------------------------- ---------------------
PolysiliconPreparation                GTs-Etch station, automatic (2)                    [*]
------------------------------------- -------------------------------------------------- ---------------------
Ingot Growth                          GT-DSS 240 furnace (21) (exclude mezzanines)       [*]
                                      -------------------------------------------------- ---------------------
                                      Under/unloader (4)                                 [*]
------------------------------------- -------------------------------------------------- ---------------------
Ingot Sectioning                      Cropping band saw (4)                              [*]
                                      -------------------------------------------------- ---------------------
                                      GT-Chamfer Grind (4)                               [*]
                                      -------------------------------------------------- ---------------------
                                      Lifetime Tester (1)                                [*]
                                      -------------------------------------------------- ---------------------
                                      IR inspection tester (1)                           [*]
------------------------------------- -------------------------------------------------- ---------------------
Wafer Cleaning                        GTs-Wafer Auto Cleaning station (1)                [*]
------------------------------------- -------------------------------------------------- ---------------------
Wafer inspection                      Automation inspection system                       [*]
------------------------------------- -------------------------------------------------- ---------------------
Slurry recovering                     GT-Slurry recovering system (1)                    [*]
------------------------------------- -------------------------------------------------- ---------------------
Misc.                                 Carts                                              [*]
                                      -------------------------------------------------- ---------------------
                                      Solar grade silicon (30 tons)                      [*]
------------------------------------- -------------------------------------------------- ---------------------
Installation                          He leak detector (1)                               [*]
------------------------------------- -------------------------------------------------- ---------------------
Production                            Technology transfer
------------------------------------- -------------------------------------------------- ---------------------
Spare parts
------------------------------------- -------------------------------------------------- ---------------------
Labor/Training/Engineering
------------------------------------- -------------------------------------------------- ---------------------
Travel cost
------------------------------------- -------------------------------------------------- ---------------------
CIF cost
------------------------------------- -------------------------------------------------- ---------------------
Total (USD)                                                                              33,001,000
------------------------------------- -------------------------------------------------- ---------------------
</Table>

The line shall be designed to be expandable on a modular basis. Some equipment
provided under this Agreement may be procured from outside the USA. Tooling is
provided for 156 mm x 156 mm wafers.

Manufacturer's recommended spare parts are included with equipment.

* Confidential treatment requested. The redacted material has been separated
Filed with The Securities And Exchange Commission.

<PAGE>
                                    EXHIBIT B

                 SPECIFICATIONS AND ACCEPTANCE TESTING OF WAFERS

        Conductivity type:              p-type (boron)
        Crystal Characteristic:         multicrystalline

        Resistivity:                    0.5 -- 2.0 ohm-cm
                                        (typical average: 1.5 ohm-cm)

        Wafer Size:                     156 mm x 156 mm x (270-325) um thick
        Wafer Size Variation:           + 0.5 mm
        Wafer Thickness Variation:      + 40 um

        Wafer throughput:               >=65MW

                                       2
<PAGE>
                                    EXHIBIT C

MAJOR TASKS: The Contract major tasks shall be as follows:

<Table>
<Caption>
TASK                     DESCRIPTION                        MONTHS*
<S>              <C>                                        <C>
Task 1           Procurement of equipment                   0 - 2
Task 2           First Equipment Shipment                   5th
Task 3           Transport & Custom Clearance               1
Task 4           Installation                               1 -- 2
Task 5           Training, Commissioning & Acceptance       1
</Table>

* Note: DSS will be shipped every month starting from the fifth month of receipt
of first Deposit.

A grace period of one (1) month can be added to the above schedule.

                                       3
<PAGE>
                                    EXHIBIT D

CUSTOMER SUPPLIED ITEMS

1.   Necessary water chillers with back-up system
2.   Necessary water with back-up systems
3.   Clean, dry compressed air
4.   Deionized water system
5.   All plumbing and wiring to the machines
6.   Necessary power with back-up systems
7.   Effluent treatment equipment
8.   Materials handling equipment
9.   Shelves, storage cabinet, and workbenches
10.  Other engineering and facility services needed-to be defined by GT Solar
     within 60 days of the Commencement Date.

                                       4

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