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Tsukasa Ohoka
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Method of manufacturing semiconductor devices
Patent number
6,576,481
Issue date
Jun 10, 2003
Hitachi Kokusai Electric Inc.
Hideharu Itatani
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Input protection circuit
Patent number
6,538,291
Issue date
Mar 25, 2003
NEC Corporation
Tsukasa Ohoka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Methods of manufacturing semiconductor devices with ruthenium films...
Patent number
6,461,961
Issue date
Oct 8, 2002
Hitachi Kokusai Electric Inc.
Atsushi Sano
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Semiconductor device with a high-voltage component in semiconductor...
Patent number
6,303,954
Issue date
Oct 16, 2001
NEC Corporation
Tsukasa Ohoka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of manufacturing semiconductor device
Patent number
5,593,915
Issue date
Jan 14, 1997
NEC Corporation
Tsukasa Ohoka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor device provided with status detecting function
Patent number
5,534,726
Issue date
Jul 9, 1996
NEC Corporation
Tsukasa Ohoka
G01 - MEASURING TESTING
Information
Patent Grant
Method of manufacturing a dielectric isolation substrate
Patent number
5,420,064
Issue date
May 30, 1995
NEC Corporation
Kensuke Okonogi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of manufacturing semiconductor device
Patent number
5,356,827
Issue date
Oct 18, 1994
NEC Corporation
Tsukasa Ohoka
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
Semiconductor treating apparatus and cleaning method of the same
Publication number
20030037802
Publication date
Feb 27, 2003
Hitachi, Ltd
Miwako Nakahara
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Application
Method of manufacturing semiconductor devices
Publication number
20020072211
Publication date
Jun 13, 2002
Hideharu Itatani
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Application
Semiconductor device manufacturing method and substrate processing...
Publication number
20020055254
Publication date
May 9, 2002
Atsushi Sano
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...