Matthias Scholl P.C.
Bidirectional insulated gate bipolar transistor
A bidirectional IGBT device, including a cellular structure including: two MOS structures, a substrate drift layer, two highly doped buried layers operating for carrier storage or field stop, two metal electrodes, and isolating dielectrics. Each MOS structure includes: a body region, a heavily doped source region, a body contact region, and a gate structure. Each gate structure includes: a gate dielectric and a gate conductive material. The two MOS structures are symmetrically disposed on the top surface and the back surface of the substrate drift layer. The heavily doped source region and the body contact region are disposed in the body region and independent from each other, and both surfaces of the heavily doped source region and the body contact region are connected to each of the two metal electrodes. The gate dielectric separates the gate conductive material from a channel region of each of the MOS structures.
UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA INSTITUTE OF ELECTRONIC AND INFORMATION ENGINEERING IN DONGGUAN, UESTC
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Zehong Xin Jingxiu Gaochao Bo Min Jinping Yadong
Li Yao Liu Xu Zhang Ren Zhang Shan