Inventor · disambiguated record
Tetsu Udagawa
Also filed as: UDAGAWA TETSU
15 granted patents·652 citations·filing 1988–2003
95Inventor score
Files withHITACHI LTD15
Top patents by PatentIndex Score
15 records- 0196US6150689ASemiconductor integrated circuit device and method for manufacturing the sameHITACHI LTD·Filed 1997·Granted Nov 21, 2000·107 cites·18 claims
- 0294US5332922AMulti-chip semiconductor packageHITACHI LTD·Filed 1991·Granted Jul 26, 1994·158 cites·16 claims
- 0392US5426616ASemiconductor IC device having a voltage conversion circuit which generates an internal supply voltage having value compensated for external supply voltage variationsHITACHI LTD·Filed 1994·Granted Jun 20, 1995·95 cites·89 claims
- 0483US6635918B1Semiconductor integrated circuit device and method for manufacturing the sameHITACHI LTD·Filed 2000·Granted Oct 21, 2003·20 cites·21 claims
- 0583US5150325ABi-CMOS semiconductor memory device, including improved layout structure and testing methodHITACHI LTD·Filed 1990·Granted Sep 22, 1992·45 cites·26 claims
- 0682US5701031ASealed stacked arrangement of semiconductor devicesHITACHI LTD·Filed 1994·Granted Dec 23, 1997·58 cites·16 claims
- 0779US6108264ADynamic type semiconductor memory deviceHITACHI LTD·Filed 1999·Granted Aug 22, 2000·34 cites·17 claims
- 0873US4941129ASemiconductor memory deviceHITACHI LTD·Filed 1988·Granted Jul 10, 1990·24 cites·12 claims
- 0970US6924525B2Semiconductor integrated circuit device including memory cell section having capacitor over bitline structure and with the memory and peripheral sections having contact plug structures containing a barrier film and effecting electrical contact with misfets of both memory and peripheral sectionsHITACHI LTD·Filed 2003·Granted Aug 2, 2005·9 cites·4 claims
- 1069US5719815ASemiconductor memory having a refresh operation cycle and operating at a high speed and reduced power consumption in a normal operation cycleHITACHI LTD·Filed 1995·Granted Feb 17, 1998·22 cites·37 claims
- 1168US5276648ATesting method for a semiconductor memory deviceHITACHI LTD·Filed 1992·Granted Jan 4, 1994·21 cites·3 claims
- 1265US5862095ASemiconductor memory having both a refresh operation cycle and a normal operation cycle and employing an address non-multiplex systemHITACHI LTD·Filed 1997·Granted Jan 19, 1999·18 cites·17 claims
- 1364US5043947ASemiconductor memory deviceHITACHI LTD·Filed 1990·Granted Aug 27, 1991·20 cites·9 claims
- 1448USRE37539ESealed stacked arrangement of semiconductor devicesHITACHI LTD·Filed 1999·Granted Feb 5, 2002·12 cites·40 claims
- 1547US5506804ADynamic Random Access Type Semiconductor DeviceHITACHI LTD·Filed 1993·Granted Apr 9, 1996·9 cites·9 claims
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