Introducing MEMC - MEMC Electronic Materials, Inc.

Technology is built on us.
Introducing MEMC
MEMC, based in St. Peters, Missouri, is a global leader in the manufacture and sale of wafers and
related products to the semiconductor and solar industries. MEMC’s products are the building blocks
for the $1 trillion electronics and the $18 billion solar cell and module markets. Through its SunEdison
subsidiary, MEMC is also a developer of solar power projects and is North America’s largest solar energy
services provider. MEMC, which was founded in 1959, employs approximately 4,800 people worldwide
and recorded sales of $1.2 billion in 2009. MEMC’s stock is traded on the New York Stock Exchange
under the symbol WFR and is included in the S&P 500 Index.
MEMC operates three business units: Semiconductor Materials, Solar Materials and Solar Energy.
Semiconductor Materials
Served market size: $7 billion
Silicon wafers are the foundation
upon which semiconductor devices
are built. Semiconductor devices
in turn supply the intelligence in all
electronic devices from computers to
smart phones, TVs, gaming devices,
music players, appliances and even
satellites. Our innovations add value
for semiconductor device makers,
helping them reduce costs while
improving the devices they build by
holding more memory, performing
faster or having longer battery life.
Funding these advancements and
next generation technologies requires
financial strength and asset-efficient
strategies. This has contributed
to the reduction in the number of
competitors we face from dozens
before 1990 to about six today.
solar Materials
Served market size: $10 billion
Silicon wafers are also the foundation
for most solar cells. Grouped together
to form solar modules, cells convert
energy from the sun into usable electricity.
While solar energy installations
have grown at a compound annual
growth rate in excess of 40 percent
during the past decade, solar energy
still represents less than 1 percent
of the world’s energy consumption.
MEMC is uniquely positioned to
help increase the prevalence of
solar technology around the world.
The Company’s aggressive cost
reductions, production efficiencies
and focus on proprietary technology
development, are aimed at helping
customers achieve grid parity, making
solar energy cost competitive without
government subsidies.
Solar Energy (SunEdison)
Served market size: $39 billion
Corporations, government agencies
and utilities around the world have
become increasingly interested in
generating solar energy on their
roof or other property. SunEdison
develops, finances, installs and
operates such distributed solar
power plants for its customers.
The customer then purchases the
electricity at predictable, competitive
prices over a fixed time period.
SunEdison’s proprietary Client
Connect software gives customers
full visibility into the performance
of their solar power plants, including
electricity production, energy costs
and savings, and environmental
attributes.
Positioned to Lead
Wafer Market Leader
• Integrated polysilicon, semiconductor wafer and solar
wafer provider
• Established and growing customer relationships in over
30 countries around the world
Technology Leadership
• Extensive intellectual property portfolio with more than
700 worldwide patents and 350 applications on file
• First large-volume manufacturer of Fluidized Bed
or “granular” polysilicon
Operational Expertise
• Competitive cost structure with further improvements targeted
• Global manufacturing, sales and service footprint makes
MEMC a “local” supplier to our customers
Diversified Markets
• One of only four major suppliers of semiconductor
wafers and a proven supplier to the solar industry
• Balanced market position provides stability and growth
New Opportunities
• Acquired in 2009, SunEdison’s downstream leadership
in solar project development accelerates growth
• Acquired in 2010, Solaicx’s proprietary process and
equipment provides entry into fast-growing, adjacent
monocrystalline solar market

www.memc.com
Global Sales and Manufacturing
Portland, Oregon
St. Peters, Missouri
Merano, Italy*
Novara, Italy
Chonan, South Korea
Utsunomyia, Japan
Sherman, Texas
Hsinchu, Taiwan
Pasadena, Texas*
Ipoh, Malaysia
Kuching, Malaysia
Kuala Lumpur, Malaysia
Manufacturing Facilities Sales & Support Offices SunEdison
St. Peters, Missouri
Sherman, Texas
Pasadena, Texas
Portland, Oregon
Merano, Italy
Novara, Italy
Kuala Lumpur, Malaysia
Kuching, Malaysia
Ipoh, Malaysia
Hsinchu, Taiwan
Chonan, South Korea
Utsunomiya, Japan
* Indicated locations are Polysilicon manufacturing facilities.
St. Peters, Missouri
Santa Clara, California
Sherman, Texas
Paris, France
Novara, Italy
Singapore
Driving Sustained Achievement at MEMC
Shanghai, China
Hsinchu, Taiwan
Seoul, South Korea
Tokyo, Japan
Toronto, Canada
Prescott, Arizona
Sacramento, California
San Clemente, California
San Francisco, California
Denver, Colorado
Beltsville, Maryland
Pennsauken, New Jersey
Portland, Oregon
San Juan, Puerto Rico
St. Thomas, Virgin Islands
Chennai, India
Seoul, South Korea
Dubai, U.A.E.
Paris, France
Lecce, Italy
Milan, Italy
Barcelona, Spain
Madrid, Spain
MEMC’s mission is to provide the highest-value products and services to customers in the semiconductor and solar
industries through exceptional quality, technology, and service.
Values are the foundation of the Company. They define MEMC and how work is done, and they never change.
The Company’s decisions are grounded in these values, and they guide relationships with customers, suppliers,
shareholders, the community, and employees. The people of MEMC live these values every day: Integrity, teamwork,
diversity, and performance.
MEMC’s culture is what makes the Company unique. It’s how MEMC chooses to operate the business. It is a
combination of MEMC’s vision and philosophy of retaining, promoting, and attracting the right people, operating in a
way that directly reflects the Company’s core values, and putting customers first. The MEMC culture is: customer-driven,
externally focused, innovative, lean, and characterized by the belief that challenges equal opportunity.
The Wafer Manufacturing Process
Granular polysilicon Ingot growth Wafer slicing Wafer polishing
(semiconductor)
Epitaxial deposition
(semiconductor)
Wafers in shipping cassette

MEMC History
MEMC’s history includes decades of innovation, industry leadership and financial prudence. Today we are making
strategic decisions to reduce our risk, expand our served markets and position MEMC with the right products and cost
structure to enable future revenue and profit growth. As we begin our next 50 years, our strategic vision is clear and we
have a skilled global team ready to take us forward.
1959 Monsanto Electronic Materials Company (MEMC) formed
1962 CZ silicon crystal process developed
1965 MEMC develops polishing process for silicon wafers
1966 First epi reactors installed at MEMC
1966 Scientists at MEMC begin developing zero-dislocation crystal
1975 First commercial production of 100mm wafers
MEMC is born in 1959
1982 MEMC pioneers epi wafers for CMOS applications
1984 Commercialized 200mm wafers
1989 MEMC acquired by E.ON affiliate
1991 300mm wafers developed
First 100mm wafers
1995 MEMC Initial Public Offering on the NYSE
1998 MEMC develops agglomerated defect free ‘Perfect Silicon’
1999 Advanced generation 200mm DSP wafers developed
2000 MEMC introduces defect-free engineered products ‘MDZ’ & ‘Optia’
2002 Significant 300mm expansion
Development of ‘Perfect Silicon’
2003 Expanded New Materials R&D group and introduced next generation
300mm ‘Perfect Silicon’
2004 Crossed over $1B revenue mark; acquired Taisil
2005 First 300mm production in Taiwan
2006 Announced entry into solar wafer market on a large scale
2007 MEMC added to S&P 500; Began wafer deliveries to solar customers
MEMC ships solar wafers
2008 Crossed over $2B revenue mark; crossed $1B to solar market
2009 MEMC celebrates 50 year anniversary; acquires leading solar project
developer, SunEdison
2010 Broadened product offering into fast-growing monocrystalline solar
market with acquisition of Solaicx
MEMC acquires SunEdison
Contact Information
MEMC • 501 Pearl Drive (City of O’Fallon) • P.O. Box 8 • St. Peters, MO 63376 • (636) 474-5000
Contact: Bill Michalek • Director, Corporate Communications • (636) 474-5443 • www.memc.com
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