Soitec and Simgui announce first 200-mm SOI wafers produced in China

Shanghai, China (Shanghai SOI Forum), September 15 , 2015 — Soitec (Euronext), a world leader in
generating and manufacturing semiconductor materials for the electronics and energy industries, and
Shanghai Simgui Technology Co., Ltd. (Simgui), a leading Chinese silicon-based semiconductor
materials company, jointly announced today that the first 200-mm silicon-on-insulator (SOI) wafers have
been produced at Simgui’s manufacturing facility in Shanghai using Soitec’s proprietary Smart Cut™
technology, and will be shipped within the next weeks for customer’s qualification. This major milestone
in the companies’ licensing and technology transfer agreement, signed in May 2014, demonstrates that the
process has been successfully implemented at Simgui and that the technology transfer is proceeding as
planned to produce Soitec’s SOI products in order to increase SOI wafer capacity to serve the growing RF
and power markets.

“We are very pleased to have reached this major milestone with Simgui, which now has the capability to
manufacture Soitec’s SOI products using our Smart Cut technology. This represents a key step in our
commitment to increase capacity in response to the needs of our customers who serve the fast-growing
RF and power markets, both in China and worldwide,” said Paul Boudre, CEO and chairman of the board
of Soitec.

“China is a hot spot for the IC industry today. The fast growth of China’s mobile devices demands a
large number of SOI wafers. Through the collaboration with Soitec, Simgui has successfully
demonstrated a strong technical ability and expanded capacity to meet our customers ‘needs. In addition
to the planned high-volume manufacturing of SOI wafers, we will continue to promote the SOI ecosystem
in China and build a globally influential Chinese silicon industry,” said Dr. Xi Wang, chairman of the
board of directors of Simgui.

The two companies formed their international partnership last year to address both China’s growing
demand and to increase worldwide production capacity for 200-mm SOI wafers used in fabricating
semiconductors for RF and power applications. When completed, the partners’ first wafer production line
in China will boost the industrial manufacturing capacity of SOI wafers to meet increasing worldwide
usage and will also be a key element in establishing an SOI ecosystem in China.

About Shanghai Simgui Technology Co., Ltd. (Simgui): Simgui is a high-technology company in
Shanghai focused on supplying SOI wafers and providing foundry services for epitaxial (epi) wafers used
in key sectors of the semiconductor industry. It was spun off from the Shanghai Institute of Microsystem
and Information Technology (SIMIT) within the Chinese Academy of Sciences (CAS) and now is a joint
venture with a group of investors from Silicon Valley. Under the leadership of Simgui’s management
team, which includes six senior executives with Ph.D. degrees, both the SOI and epi businesses are
growing dramatically. For more information, visit: http://www.simgui.com.cn/en/

About Soitec: Soitec (Euronext, Tech 40 Paris) is a world leader in designing and manufacturing high-
performance semiconductor materials. The company uses its unique technologies and semiconductor
expertise to serve the electronics and energy markets. With 3,600 patents worldwide, Soitec’s strategy is
based on disruptive innovation to answer its customers’ needs for high performance, energy efficiency
and cost competitiveness. Soitec has manufacturing facilities, R&D centers and offices in Europe, the
U.S. and Asia. For more information, please visit www.soitec.com and follow us on Twitter:
@Soitec_EN