GT SOLAR INCORPORATED EMPLOYEE,
NON-COMPETITION, NON-DISCLOSURE,
PROPRIETARY INFORMATION AND PATENT AND INVENTION

ASSIGNMENT AGREEMENT

In consideration of my employment or continued employment, as the case may be, with GT Solar Incorporated (the "Company"), and the compensation received by me from the Company, from time to time, I hereby agree with the Company as follows:

1. Proprietary Information and Inventions—I understand and acknowledge that:

A. The Company is engaged in a continuous program of research, design, development, production, marketing and servicing with respect to its business and that as part of my employment by the Company, I am (or may be), expected to make new contributions and inventions of value to the Company.

B. My employment creates a relationship of confidence and trust between me and the Company with respect to certain information applicable to the business of the Company or applicable to the business of any client or customer of the Company, which may be made known to me by the Company or by any client or customer of the Company, or learned by me during the period of my employment.

C. The Company possesses, and will continue to possess, information that has been created, discovered or developed by, or otherwise become known to, the Company (including, without limitation, information created, discovered, developed or made known by me during the period of or arising out of my employment by the Company, whether before or after the date hereof) or in which property rights have been or may be assigned or otherwise conveyed to the Company, which information has commercial value in the business in which the Company is engaged and is treated by the Company as confidential. All such information is hereinafter called "Proprietary Information", which term, as used herein, shall also include, but shall not be limited to, systems, processes, formulae, data, functional specifications, computer programs, blueprints, know-how, improvements, discoveries, developments, designs, inventions, techniques, marketing plans, strategies, forecasts, new products, unpublished financial statements, budgets, projections, licenses, prices, costs and customer and supplier lists; provided, however, that the term "Proprietary Information" shall not include any of the foregoing which is in the public domain.

D. All existing confidential lists of customers of the Company, and all confidential lists of customers of the Company developed during the course of my employment by the Company, are and shall be the sole and exclusive property of the Company, and that I neither have nor shall have any right, title or interest therein; such lists of customers are and must continue to be confidential; and the Company's present and future business relationship with its customers is and will continue to be of a type which normally continues unless interfered with by others.

E. As used herein, the period of my employment includes any time during which I may be retained by the Company as an Independent Contractor.

2. Ownership of Proprietary Information—All Proprietary Information shall be the sole property of the Company and its assigns, and the Company and its assigns shall be the sole owner of all patents, copyrights, trademarks and other rights in connection therewith. I hereby assign to the Company any rights I may have or acquire in such Proprietary Information. I hereby acknowledge that all Proprietary Information is and must continue to be confidential and that the same is not readily accessible to competitors of the Company. At all times, both during my employment by the Company and after its termination, I will keep in strictest confidence and trust all Proprietary Information and I will not use or disclose any Proprietary Information without the written consent of the Company, except as may be necessary in the ordinary course of performing my duties as an employee of the Company.

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