Kiyosu, Japan, May 14, 2015: Toyoda Gosei Co., Ltd. has developed low loss semiconductor device technologies for high power application such as rectifiers and switching transistors. These technologies use gallium nitride, a key material in blue LEDs that also has the superior characteristic of being able to withstand high voltages.

Application of the new technology to devices such as the power control units used in hybrid vehicles and power converters used in solar power systems is promising for the development of smaller and more efficient devices.

Toyoda Gosei began researching gallium nitride semiconductor power device technologies in 2010, using the crystal growth technology it has cultivated since 1986 in the development and production of blue LEDs. We have now developed a low loss metal-oxide-semiconductor field effect transistor (MOFSET) that allows current flow only when a signal is given to switch (gate). Otherwise no current flows even under high voltage of 1200 V.

MOFSETs are a type of transistor used in power devices. Toyoda Gosei innovations include a vertical structure so that current flows perpendicularly to the substrate with a trench gate structure. In the laboratory we have achieved low loss characteristics of 1.8 mΩ-cm² resistance when current is flowing--a level that is among the highest in the world.

This new technology will be exhibited at TECHNO-FRONTIER 2015

Toyoda Gosei will continue R&D activities for the early commercialization of power devices for customers desiring low dissipation or high speed switching.

About Toyoda Gosei

Established in 1949 and headquartered in Kiyosu, Aichi Prefecture, Japan, Toyoda Gosei is a leading specialty manufacturer of rubber and plastic automotive parts and LEDs. Today, the Toyoda Gosei group provides a broad range of high quality products internationally, with a network of some 100 plants and offices in 18 countries and regions. Through its flexible, integrated global supply system and leading-edge technologies for automotive safety, comfort, and environmental protection, Toyoda Gosei is a global supplier that delivers the highest levels of innovation, quality and satisfaction to customers worldwide.