GT Solar Signs $173 Million Contract With DC Chemical

U.S. Company To Increase Export Of
Polysilicon Production Equipment To South Korea
MERRIMACK, N.H.--(Business Wire)--
GT Solar Incorporated, a global provider of specialized equipment
and technology for the solar power industry, announced that on July
11, 2008, it signed a $173 million contract with DC Chemical Co.,
Ltd., a leading Korean chemical company. The signing of the contract
has previously been disclosed.

Under the terms of the agreement, GT Solar will provide DC
Chemical with state-of-the-art polysilicon CVD reactors, which are
used to manufacture polysilicon, a key raw material utilized to
produce solar cells. This latest agreement marks the third contract
between the two companies since GT Solar began offering CVD reactors
and related equipment in 2006.

"Higher global energy prices, increased environmental awareness
and the desire for energy security are accelerating the adoption of
solar power. In addition, governments around the world have
implemented various tariffs, tax credits and other incentives designed
to encourage the use of solar power," said Tom Zarrella, president and
chief executive officer for GT Solar International. "DC Chemical has
constructed its first polysilicon plant, has begun manufacturing
polysilicon, and recently announced a large-scale expansion. We are
proud to be working with this forward-thinking company and pleased to
support their expanding operations."

"GT Solar has been a trusted provider of equipment and expertise
to DC Chemical since we entered the high-value, high-growth
polysilicon business more than two years ago," said Mr. Shin, DC
Chemical's vice chairman. "We look forward to utilizing our new
reactors to increase our polysilicon production capabilities at our
existing facility in Gunsan, South Korea, and to strengthening our
relationship with GT Solar."

Polysilicon is a highly purified form of silicon that is used to
make both semiconductor wafers for microelectronics applications and
solar wafers. The chemical vapor deposition process involved in the
production of polysilicon takes place in a specialized CVD reactor
using a variety of complex chemical processes.

Details of this contract were publicly disclosed on July 11, 2008,
in a filing with the U.S. Securities and Exchange Commission. The
agreement contemplates that GT Solar would begin to deliver reactors
to DC Chemical in April 2009.

About GT Solar Incorporated

GT Solar Incorporated, based in Merrimack, NH (USA), is a wholly
owned subsidiary of GT Solar International, Inc. (NASDAQ: SOLR), a
global provider of specialized manufacturing equipment and services
essential for the production of photovoltaic wafers, cells and modules
and polysilicon. GT Solar's principal products are directional
solidification systems and chemical vapor deposition reactors and
related equipment. For additional information about GT Solar, please
visit www.gtsolar.com.

Forward-Looking Statement

Some of the statements that we make in this press release are
forward looking in nature. These statements are based on management's
current expectations or beliefs. These forward looking statements are
not a guarantee of performance and are subject to a number of
uncertainties and other factors, many of which are outside our
control, which could cause actual events to differ materially from
those expressed or implied by the statements. These factors may
include our inability to manage our expansion effectively, our
dependence on a small number of customers and suppliers, our limited
number of products, the possibility of product liability claims, our
inability to protect our intellectual property rights, increased
competition from other manufacturers of equipment for PV products,
risks associated with doing business in foreign countries and various
other risks as outlined in GT Solar International, Inc.'s filings with
the Securities and Exchange Commission. Statements in this press
release should be evaluated in light of these important factors. GT
Solar International, Inc. is under no obligation to, and expressly
disclaims any such obligation to, update or alter its forward-looking
statements, whether as a result of new information, future events, or
otherwise.

GT Solar Incorporated
Susan Vaillancourt, 603-589-3782
susan.vaillancourt@gtsolar.com
or
Hill & Knowlton
Jessica Anderson, 212-885-0492
jessica.anderson@hillandknowlton.com

Copyright Business Wire 2008