Inventor
YASUDA YASUMICHI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “YASUDA YASUMICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
14 patentsUS5804868ASep 8, 1998
Semiconductor device having planar junction
HITACHI LTD56 citations96
US5539244AJul 23, 1996
Power semiconductor device
HITACHI LTD23 citations92
US5274541ADec 28, 1993
Parallel circuit module including a diode and an IGBT
HITACHI LTD32 citations92
US5208471AMay 4, 1993
Semiconductor device and manufacturing method therefor
HITACHI LTD54 citations92
US4193826AMar 18, 1980
Vapor phase diffusion of aluminum with or without boron
HITACHI LTD35 citations92
US5691553ANov 25, 1997
Semiconductor device and power converter using same
HITACHI LTD33 citations91
US5898199AApr 27, 1999
Semiconductor device and power converter using same
HITACHI LTD16 citations80
US5285094AFeb 8, 1994
Vertical insulated gate semiconductor device with less influence from the parasitic bipolar effect
HITACHI LTD14 citations73
US5179034AJan 12, 1993
Method for fabricating insulated gate semiconductor device
HITACHI LTD18 citations73
US5032532AJul 16, 1991
Method for fabricating insulated gate semiconductor device
HITACHI LTD12 citations73
US3984859AOct 5, 1976
High withstand voltage semiconductor device with shallow grooves between semiconductor region and field limiting rings with outer mesa groove
HITACHI LTD16 citations73
US6198126B1Mar 6, 2001
Semiconductor device and power converter using same
HITACHI LTD13 citations72
US5670811ASep 23, 1997
Vertical insulated gate semiconductor device having high current density and high reliability
HITACHI LTD3 citations62
US5262339ANov 16, 1993
Method of manufacturing a power semiconductor device using implants and solid diffusion source
HITACHI LTD6 citations62