Tetsu Udagawa

Person

Iruma, JP

People

Patents Grantslast 30 patents

Information Patent Grant
SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE INCLUDING MEMORY CELL SECTI...
- Patent number 6,924,525
- Issue date Aug 2, 2005
- Hitachi, Ltd.
- Seiji Narui
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor integrated circuit device and method for manufacturin...
- Patent number 6,635,918
- Issue date Oct 21, 2003
- Hitachi, Ltd.
- Seiji Narui
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Sealed stacked arrangement of semiconductor devices
- Patent number RE37539
- Issue date Feb 5, 2002
- Hitachi, Ltd.
- Satoshi Oguchi
- 257 - Active solid-state devices
Information Patent Grant
Semiconductor integrated circuit device and method for manufacturin...
- Patent number 6,150,689
- Issue date Nov 21, 2000
- Hitachi, Ltd.
- Seiji Narui
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dynamic type semiconductor memory device
- Patent number 6,108,264
- Issue date Aug 22, 2000
- Hitachi, Ltd.
- Yasushi Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor memory having both a refresh operation cycle and a no...
- Patent number 5,862,095
- Issue date Jan 19, 1999
- Hitachi, Ltd.
- Yasushi Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor memory having a refresh operation cycle and operating...
- Patent number 5,719,815
- Issue date Feb 17, 1998
- Hitachi, Ltd.
- Yasushi Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Sealed stacked arrangement of semiconductor devices
- Patent number 5,701,031
- Issue date Dec 23, 1997
- Hitachi, Ltd.
- Satoshi Oguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Dynamic Random Access Type Semiconductor Device
- Patent number 5,506,804
- Issue date Apr 9, 1996
- Hitachi, Ltd.
- Kazumasa Yanagisawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor IC device having a voltage conversion circuit which g...
- Patent number 5,426,616
- Issue date Jun 20, 1995
- Hitachi, Ltd.
- Kazuhiko Kajigaya
- G11 - INFORMATION STORAGE
Information Patent Grant
Multi-chip semiconductor package
- Patent number 5,332,922
- Issue date Jul 26, 1994
- Hitachi, Ltd.
- Satoshi Oguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Testing method for a semiconductor memory device
- Patent number 5,276,648
- Issue date Jan 4, 1994
- Hitachi, Ltd.
- Kazumasa Yanagisawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Bi-CMOS semiconductor memory device, including improved layout stru...
- Patent number 5,150,325
- Issue date Sep 22, 1992
- Hitachi, Ltd.
- Kazumasa Yanagisawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor memory device
- Patent number 5,043,947
- Issue date Aug 27, 1991
- Hitachi, Ltd.
- Kazuyoshi Oshima
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor memory device
- Patent number 4,941,129
- Issue date Jul 10, 1990
- Hitachi, Ltd.
- Kazuyoshi Oshima
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Semiconductor integrated circuit device and method for manufacturin...
- Publication number 20040031980
- Publication date Feb 19, 2004
- Seiji Narui
- H01 - BASIC ELECTRIC ELEMENTS

Tetsu Udagawa

Person

Patents Grantslast 30 patents

SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE INCLUDING MEMORY CELL SECTI...

Semiconductor integrated circuit device and method for manufacturin...

Sealed stacked arrangement of semiconductor devices

Semiconductor integrated circuit device and method for manufacturin...

Dynamic type semiconductor memory device

Semiconductor memory having both a refresh operation cycle and a no...

Semiconductor memory having a refresh operation cycle and operating...

Sealed stacked arrangement of semiconductor devices

Dynamic Random Access Type Semiconductor Device

Semiconductor IC device having a voltage conversion circuit which g...

Multi-chip semiconductor package

Testing method for a semiconductor memory device

Bi-CMOS semiconductor memory device, including improved layout stru...

Semiconductor memory device

Semiconductor memory device

Patents Applicationslast 30 patents

Semiconductor integrated circuit device and method for manufacturin...