Inventor
KUMAGAI NAOKI
JP49 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAI NAOKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJI ELECTRIC CO LTD
35 patentsUS6570413B1May 27, 2003
Driver circuit for switching device
FUJI ELECTRIC CO LTD61 citations96
US5896043AApr 20, 1999
Level shift circuit
FUJI ELECTRIC CO LTD59 citations96
US5304802AApr 19, 1994
Semiconductor device including overvoltage protective circuit
FUJI ELECTRIC CO LTD55 citations96
US6977425B2Dec 20, 2005
Semiconductor device having a lateral MOSFET and combined IC using the same
FUJI ELECTRIC CO LTD24 citations92
US6501321B2Dec 31, 2002
Level shift circuit
FUJI ELECTRIC CO LTD24 citations92
US6326831B1Dec 4, 2001
Level shift circuit
FUJI ELECTRIC CO LTD29 citations92
US6323539B1Nov 27, 2001
High voltage integrated circuit, high voltage junction terminating structure, and high voltage MIS transistor
FUJI ELECTRIC CO LTD34 citations92
US6124628ASep 26, 2000
High voltage integrated circuit, high voltage junction terminating structure, and high voltage MIS transistor
FUJI ELECTRIC CO LTD52 citations92
US5475333ADec 12, 1995
Built-in drive power-source semiconductor device
FUJI ELECTRIC CO LTD27 citations92
US5430323AJul 4, 1995
Injection control-type Schottky barrier rectifier
FUJI ELECTRIC CO LTD29 citations92
US5303110AApr 12, 1994
Insulated-gate controlled semiconductor device
FUJI ELECTRIC CO LTD26 citations92
US6870223B2Mar 22, 2005
High power semiconductor device having a Schottky barrier diode
FUJI ELECTRIC CO LTD18 citations91
US9825025B2Nov 21, 2017
Semiconductor device and method of manufacturing semiconductor device
FUJI ELECTRIC CO LTD7 citations84
US5844760ADec 1, 1998
Insulated-gate controlled semiconductor device
FUJI ELECTRIC CO LTD18 citations84
US5585650ADec 17, 1996
Semiconductor bidirectional switch and method of driving the same
FUJI ELECTRIC CO LTD19 citations84
US5925900AJul 20, 1999
Emitter-switched thyristor having a floating ohmic contact
FUJI ELECTRIC CO LTD13 citations74
US5477077ADec 19, 1995
Semiconductor device and a method for the manufacture thereof
FUJI ELECTRIC CO LTD9 citations74
US5051808ASep 24, 1991
Semiconductor device with low inductance of wirings connecting individual elements of the device
FUJI ELECTRIC CO LTD11 citations74
US10770581B2Sep 8, 2020
Semiconductor device
FUJI ELECTRIC CO LTD3 citations73
US10522672B2Dec 31, 2019
Semiconductor device
FUJI ELECTRIC CO LTD2 citations73
US9595608B2Mar 14, 2017
Semiconductor device
FUJI ELECTRIC CO LTD3 citations73
US9349855B2May 24, 2016
Wide band gap semiconductor device
FUJI ELECTRIC CO LTD4 citations73
US5744830AApr 28, 1998
Semiconductor device
FUJI ELECTRIC CO LTD11 citations70
US9390843B2Jul 12, 2016
Input circuit includes a constant current circuit
FUJI ELECTRIC CO LTD2 citations63
US9318547B2Apr 19, 2016
Wide bandgap insulated gate semiconductor device
FUJI ELECTRIC CO LTD2 citations63
US9093493B2Jul 28, 2015
Wide bandgap insulated gate semiconductor device
FUJI ELECTRIC CO LTD3 citations63
US7247923B2Jul 24, 2007
Semiconductor device having a lateral MOSFET and combined IC using the same
FUJI ELECTRIC CO LTD2 citations63
US5068581ANov 26, 1991
Horizontal deflection circuit for high-frequency scanning
FUJI ELECTRIC CO LTD5 citations62
US7476935B2Jan 13, 2009
High power semiconductor device having a schottky barrier diode
FUJI ELECTRIC CO LTD4 citations61
US11538902B2Dec 27, 2022
Silicon carbide semiconductor device
FUJI ELECTRIC CO LTD0 citations52
US9761705B2Sep 12, 2017
Wide band gap semiconductor device
FUJI ELECTRIC CO LTD0 citations52
US10096680B2Oct 9, 2018
Silicon carbide semiconductor device and method of manufacturing silicon carbide semiconductor device
FUJI ELECTRIC CO LTD1 citations51
US10770582B2Sep 8, 2020
Semiconductor device
FUJI ELECTRIC CO LTD0 citations42
US10451665B2Oct 22, 2019
Pulse current application circuit and control method thereof
FUJI ELECTRIC CO LTD0 citations42
US10147797B2Dec 4, 2018
Silicon carbide semiconductor device and method of manufacturing silicon carbide semiconductor device
FUJI ELECTRIC CO LTD0 citations41
FUJI ELEC DEVICE TECH CO LTD
4 patentsUS7436024B2Oct 14, 2008
Semiconductor device and method of manufacturing the same
FUJI ELEC DEVICE TECH CO LTD11 citations82
US6934139B2Aug 23, 2005
Intelligent power module
FUJI ELEC DEVICE TECH CO LTD17 citations82
US7602022B2Oct 13, 2009
Surge voltage protection diode with controlled p-n junction density gradients
FUJI ELEC DEVICE TECH CO LTD2 citations57
US7723817B2May 25, 2010
Semiconductor device and manufacturing method thereof
FUJI ELEC DEVICE TECH CO LTD1 citations50