With a unique combination of electrical, thermal, chemical and mechanical properties that withstand extreme temperature and other demanding environments, DuPont™ Kapton® polyimide films have set the standard in high performance, reliability and durability

WILMINGTON, Del., Oct. 12, 2010 -- DuPont Circuit & Packaging Materials announces the

commercial availability of DuPont™ Kapton® polyimide films engineered for thin film and flexible photovoltaic
substrates. DuPont has developed two key products for Amorphous Silicon (a-Si) modules and Copper Indium
Gallium Selenide (CIGS) photovoltaic applications; and additional Kapton® technologies are in development to
further increase the efficiency and lifetime of photovoltaic modules, reduce overall system costs and help the
industry reach grid parity faster.

"With a unique combination of electrical, thermal, chemical and mechanical properties that
withstand extreme temperature and other demanding environments, DuPont™ Kapton® polyimide films have set
the standard in high performance, reliability and durability," said Robert G. Schmidt, new business development
manager, Photovoltaics - DuPont Circuit & Packaging Materials. "They have made innovative design solutions
possible in a range of industries over the last 40 years including aerospace, automotive and industrial applications;
and we are continuing to put science to work to increase efficiency and performance for the flexible and thin film
photovoltaic industry."

Considered the material of choice in applications involving temperature extremes and harsh
environments, Kapton® polyimide films have set the standard for long-term reliability and high-performance
substrate technologies with their superior durability, flexibility and temperature tolerance - making them ideal for
use in today's high growth flexible and thin film photovoltaic markets.

The new products include:
• DuPont™ Kapton® PV9101polymide film for ease of manufacturing and robust mechanical
performance;
• DuPont™ Kapton® PV9102 polyimide film for ease of manufacturing and increased productivity; and,
• DuPont™ Kapton® PV9103 polyimide film, which will be available later this year, for maximum
productivity.
In thin film a-Si modules and CIGS applications, the mechanical properties and dimensional
stability of these substrates at elevated deposition temperatures are critical to producing cells with maximum
efficiency and yields. The low coefficient of thermal expansion, high glass transition temperature and low
shrinkage of Kapton® polyimide films help minimize stress at the interface with other materials of construction,
both during processing and end use in temperature extremes. The thermal stability of Kapton® films also allows
processing temperatures in excess of 400 degrees Celsius.

DuPont™ Kapton® PV series polyimide films provide roll-to-roll processing capability, low
moisture uptake and high moisture release characteristics, excellent electrical properties and increased voltage
endurance, and ceramic-filled versions to increase corona resistance and thermal conductivity.
DuPont Photovoltaic Solutions will be exhibiting at Solar Power International 2010 in Los
Angeles, Calif., on Oct. 12-14, 2010, in booth 805.

DuPont™ Kapton® polyimide films are part of a broad and growing portfolio of products
represented by DuPont Photovoltaic Solutions, which connects science and technology from across the company
on a global scale to help support the dramatic growth in the photovoltaic industry. To learn more, please visit
http://photovoltaics.dupont.com.

DuPont (www.dupont.com) is a science-based products and services company. Founded in 1802,
DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people
everywhere. Operating in more than 90 countries, DuPont offers a wide range of innovative products and services
for markets including agriculture and food; building and construction; communications; and transportation.