Naoki Kumagai

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Silicon carbide semiconductor device
- Patent number 11,538,902
- Issue date Dec 27, 2022
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device
- Patent number 10,770,581
- Issue date Sep 8, 2020
- Fuji Electric Co., Ltd.
- Yusuke Kobayashi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device
- Patent number 10,770,582
- Issue date Sep 8, 2020
- Fuji Electric Co., Ltd.
- Yusuke Kobayashi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device
- Patent number 10,522,672
- Issue date Dec 31, 2019
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Pulse current application circuit and control method thereof
- Patent number 10,451,665
- Issue date Oct 22, 2019
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Silicon carbide semiconductor device and method of manufacturing si...
- Patent number 10,147,797
- Issue date Dec 4, 2018
- Fuji Electric Co., Ltd.
- Takumi Fujimoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Silicon carbide semiconductor device and method of manufacturing si...
- Patent number 10,096,680
- Issue date Oct 9, 2018
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device and method of manufacturing semiconductor device
- Patent number 9,825,025
- Issue date Nov 21, 2017
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Wide band gap semiconductor device
- Patent number 9,761,705
- Issue date Sep 12, 2017
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device
- Patent number 9,595,608
- Issue date Mar 14, 2017
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Input circuit includes a constant current circuit
- Patent number 9,390,843
- Issue date Jul 12, 2016
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- G05 - CONTROLLING REGULATING
Information Patent Grant
Wide band gap semiconductor device
- Patent number 9,349,855
- Issue date May 24, 2016
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Wide bandgap insulated gate semiconductor device
- Patent number 9,318,547
- Issue date Apr 19, 2016
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Wide bandgap insulated gate semiconductor device
- Patent number 9,093,493
- Issue date Jul 28, 2015
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gate drive device
- Patent number 8,217,704
- Issue date Jul 10, 2012
- Fuji Electric Co., Ltd.
- Takanori Kohama
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Semiconductor device and manufacturing method thereof
- Patent number 7,723,817
- Issue date May 25, 2010
- Fuji Electric Device Technology Co., Ltd.
- Hiroshi Kanemaru
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Surge voltage protection diode with controlled p-n junction density...
- Patent number 7,602,022
- Issue date Oct 13, 2009
- Fuji Electric Device Technology Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High power semiconductor device having a schottky barrier diode
- Patent number 7,476,935
- Issue date Jan 13, 2009
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device and method of manufacturing the same
- Patent number 7,436,024
- Issue date Oct 14, 2008
- Fuji Electric Device Technology Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device having a lateral MOSFET and combined IC using...
- Patent number 7,247,923
- Issue date Jul 24, 2007
- Fuji Electric Co., Ltd.
- Kazuhiko Yoshida
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device having a lateral MOSFET and combined IC using...
- Patent number 6,977,425
- Issue date Dec 20, 2005
- Fuji Electric Co., Ltd.
- Kazuhiko Yoshida
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Intelligent power module
- Patent number 6,934,139
- Issue date Aug 23, 2005
- Fuji Electric Device Technology Co., Ltd.
- Naoki Kumagai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
High power semiconductor device having a Schottky barrier diode
- Patent number 6,870,223
- Issue date Mar 22, 2005
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Driver circuit for switching device
- Patent number 6,570,413
- Issue date May 27, 2003
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Level shift circuit
- Patent number 6,501,321
- Issue date Dec 31, 2002
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Level shift circuit
- Patent number 6,326,831
- Issue date Dec 4, 2001
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
High voltage integrated circuit, high voltage junction terminating...
- Patent number 6,323,539
- Issue date Nov 27, 2001
- Fuji Electric Co., Ltd.
- Tatsuhiko Fujihira
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High voltage integrated circuit, high voltage junction terminating...
- Patent number 6,124,628
- Issue date Sep 26, 2000
- Fuji Electric Co., Ltd.
- Tatsuhiko Fujihira
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Emitter-switched thyristor having a floating ohmic contact
- Patent number 5,925,900
- Issue date Jul 20, 1999
- Fuji Electric Co., Ltd.
- Gehan Anil Joseph Amaratunga
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Level shift circuit
- Patent number 5,896,043
- Issue date Apr 20, 1999
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
SUPERJUNCTION SEMICONDUCTOR DEVICE
- Publication number 20230246102
- Publication date Aug 3, 2023
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
GATE VOLTAGE DETERMINATION APPARATUS, GATE VOLTAGE DETERMINATION ME...
- Publication number 20230236239
- Publication date Jul 27, 2023
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- G01 - MEASURING TESTING
Information Patent Application
SILICON CARBIDE SEMICONDUCTOR DEVICE
- Publication number 20210296435
- Publication date Sep 23, 2021
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SEMICONDUCTOR DEVICE
- Publication number 20200083369
- Publication date Mar 12, 2020
- Fuji Electric Co., Ltd.
- Yusuke Kobayashi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SEMICONDUCTOR DEVICE
- Publication number 20200083368
- Publication date Mar 12, 2020
- Fuji Electric Co., Ltd.
- Yusuke KOBAYASHI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SEMICONDUCTOR DEVICE
- Publication number 20190081170
- Publication date Mar 14, 2019
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
PULSE CURRENT APPLICATION CIRCUIT AND CONTROL METHOD THEREOF
- Publication number 20180340972
- Publication date Nov 29, 2018
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- G01 - MEASURING TESTING
Information Patent Application
SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE
- Publication number 20170271324
- Publication date Sep 21, 2017
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SILICON CARBIDE SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SI...
- Publication number 20170236914
- Publication date Aug 17, 2017
- Fuji Electric Co., Ltd.
- Takumi FUJIMOTO
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SILICON CARBIDE SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SI...
- Publication number 20170194438
- Publication date Jul 6, 2017
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WIDE BAND GAP SEMICONDUCTOR DEVICE
- Publication number 20160225894
- Publication date Aug 4, 2016
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WIDE BANDGAP INSULATED GATE SEMICONDUCTOR DEVICE
- Publication number 20150287777
- Publication date Oct 8, 2015
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SEMICONDUCTOR DEVICE
- Publication number 20150162432
- Publication date Jun 11, 2015
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
INPUT CIRCUIT
- Publication number 20150115928
- Publication date Apr 30, 2015
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
WIDE BANDGAP INSULATED GATE SEMICONDUCTOR DEVICE
- Publication number 20150053999
- Publication date Feb 26, 2015
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WIDE BAND GAP SEMICONDUCTOR DEVICE
- Publication number 20140145209
- Publication date May 29, 2014
- Fuji Electric Co., Ltd.
- Naoki KUMAGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Gate drive device
- Publication number 20100289562
- Publication date Nov 18, 2010
- Fuji Electric Systems Co., Ltd.
- Takanori Kohama
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Semiconductor Device and Manufacturing Method Thereof
- Publication number 20070029636
- Publication date Feb 8, 2007
- Fuji Electric Device Technology Co., LTD.
- Hiroshi Kanemaru
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Surge voltage protection diode and method of forming the same
- Publication number 20060231836
- Publication date Oct 19, 2006
- Fuji Electric Device Technology Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Semiconductor device and method of manufacturing the same
- Publication number 20060027863
- Publication date Feb 9, 2006
- Fuji Electric Device Technology Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Semiconductor device having a lateral MOSFET and combined IC using...
- Publication number 20060022265
- Publication date Feb 2, 2006
- Fuji Electric Co., Ltd.
- Kazuhiko Yoshida
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
High power semiconductor device having a schottky barrier diode
- Publication number 20050145975
- Publication date Jul 7, 2005
- Fuji Electric Co., Ltd.
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Semiconductor device and combined IC using the same
- Publication number 20040026728
- Publication date Feb 12, 2004
- Kazuhiko Yoshida
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Semiconductor device
- Publication number 20030127687
- Publication date Jul 10, 2003
- Naoki Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Intelligent power module
- Publication number 20020039269
- Publication date Apr 4, 2002
- Naoki Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Level shift circuit
- Publication number 20020014905
- Publication date Feb 7, 2002
- Fuji Electric, Co., Ltd.
- Naoki Kumagai
- H03 - BASIC ELECTRONIC CIRCUITRY

Naoki Kumagai

Person

Patents Grantslast 30 patents

Silicon carbide semiconductor device

Semiconductor device

Semiconductor device

Semiconductor device

Pulse current application circuit and control method thereof

Silicon carbide semiconductor device and method of manufacturing si...

Silicon carbide semiconductor device and method of manufacturing si...

Semiconductor device and method of manufacturing semiconductor device

Wide band gap semiconductor device

Semiconductor device

Input circuit includes a constant current circuit

Wide band gap semiconductor device

Wide bandgap insulated gate semiconductor device

Wide bandgap insulated gate semiconductor device

Gate drive device

Semiconductor device and manufacturing method thereof

Surge voltage protection diode with controlled p-n junction density...

High power semiconductor device having a schottky barrier diode

Semiconductor device and method of manufacturing the same

Semiconductor device having a lateral MOSFET and combined IC using...

Semiconductor device having a lateral MOSFET and combined IC using...

Intelligent power module

High power semiconductor device having a Schottky barrier diode

Driver circuit for switching device

Level shift circuit

Level shift circuit

High voltage integrated circuit, high voltage junction terminating...

High voltage integrated circuit, high voltage junction terminating...

Emitter-switched thyristor having a floating ohmic contact

Level shift circuit

Patents Applicationslast 30 patents

SUPERJUNCTION SEMICONDUCTOR DEVICE

GATE VOLTAGE DETERMINATION APPARATUS, GATE VOLTAGE DETERMINATION ME...

SILICON CARBIDE SEMICONDUCTOR DEVICE

SEMICONDUCTOR DEVICE

SEMICONDUCTOR DEVICE

SEMICONDUCTOR DEVICE

PULSE CURRENT APPLICATION CIRCUIT AND CONTROL METHOD THEREOF

SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE

SILICON CARBIDE SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SI...

SILICON CARBIDE SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SI...

WIDE BAND GAP SEMICONDUCTOR DEVICE

WIDE BANDGAP INSULATED GATE SEMICONDUCTOR DEVICE

SEMICONDUCTOR DEVICE

INPUT CIRCUIT

WIDE BANDGAP INSULATED GATE SEMICONDUCTOR DEVICE

WIDE BAND GAP SEMICONDUCTOR DEVICE

Gate drive device

Semiconductor Device and Manufacturing Method Thereof

Surge voltage protection diode and method of forming the same

Semiconductor device and method of manufacturing the same

Semiconductor device having a lateral MOSFET and combined IC using...

High power semiconductor device having a schottky barrier diode

Semiconductor device and combined IC using the same

Semiconductor device

Intelligent power module

Level shift circuit