Inventor · disambiguated record
Kazuhiko Kajigaya
Also filed as: KAJIGAYA KAZUHIKO
227 granted patents·32 pending applications·3,296 citations·filing 1984–2022
99Inventor score
Files withHITACHI LTD97ELPIDA MEMORY INC72KAJIGAYA KAZUHIKO31MICRON TECHNOLOGY INC18PS4 LUXCO SARL16
Top patents by PatentIndex Score
259 records- 0198US9761312B1FeRAM-DRAM hybrid memoryMICRON TECHNOLOGY INC·Filed 2016·Granted Sep 12, 2017·38 cites·24 claims
- 0298US9514792B2Semiconductor device having stacked layersKAJIGAYA KAZUHIKO·Filed 2012·Granted Dec 6, 2016·44 cites·10 claims
- 0398US7948784B2Semiconductor memory device having vertical transistorsELPIDA MEMORY INC·Filed 2008·Granted May 24, 2011·56 cites·10 claims
- 0498US5724297ASemiconductor integrated circuit device and method of activating the sameHITACHI LTD·Filed 1996·Granted Mar 3, 1998·138 cites·40 claims
- 0596US6150689ASemiconductor integrated circuit device and method for manufacturing the sameHITACHI LTD·Filed 1997·Granted Nov 21, 2000·107 cites·18 claims
- 0696US5426603ADynamic RAM and information processing system using the sameHITACHI LTD·Filed 1994·Granted Jun 20, 1995·164 cites·14 claims
- 0795US7603592B2Semiconductor device having a sense amplifier array with adjacent ECCHITACHI LTD·Filed 2006·Granted Oct 13, 2009·50 cites·14 claims
- 0894US9558063B2Semiconductor device and error correction methodMICRON TECHNOLOGY INC·Filed 2014·Granted Jan 31, 2017·13 cites·12 claims
- 0993US5926430ASemiconductor integrated circuit device and method of activating the sameHITACHI LTD·Filed 1997·Granted Jul 20, 1999·52 cites·46 claims
- 1092US7304910B1Semiconductor memory device with sub-amplifiers having a variable current sourceHITACHI LTD·Filed 2006·Granted Dec 4, 2007·23 cites·11 claims
- 1192US6195306B1Semiconductor deviceHITACHI LTD·Filed 1999·Granted Feb 27, 2001·57 cites·11 claims
- 1292US5426616ASemiconductor 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
- 1391US10747463B2Apparatuses and methods for accessing hybrid memory systemMICRON TECHNOLOGY INC·Filed 2017·Granted Aug 18, 2020·6 cites·8 claims
- 1491US8588019B2Semiconductor device having current change memory cellKAJIGAYA KAZUHIKO·Filed 2011·Granted Nov 19, 2013·13 cites·21 claims
- 1591US8509020B2Data processing systemKAJIGAYA KAZUHIKO·Filed 2011·Granted Aug 13, 2013·15 cites·20 claims
- 1691US7333363B2Semiconductor storage apparatusELPIDA MEMORY INC·Filed 2006·Granted Feb 19, 2008·21 cites·20 claims
- 1791US7248528B2Refresh control method of a semiconductor memory device and semiconductor memory deviceELPIDA MEMORY INC·Filed 2005·Granted Jul 24, 2007·25 cites·28 claims
- 1891US6501672B1Dynamic random access memory (DRAM) capable of canceling out complementary noise developed in plate electrodes of memory cell capacitorsHITACHI LTD·Filed 2000·Granted Dec 31, 2002·40 cites·20 claims
- 1991US6372554B1Semiconductor integrated circuit device and method for production of the sameHITACHI LTD·Filed 1999·Granted Apr 16, 2002·135 cites·21 claims
- 2091US6107869ASemiconductor integrated circuitHITACHI LTD·Filed 1998·Granted Aug 22, 2000·69 cites·17 claims
- 2190US7489588B2Semiconductor memory device having a main amplifier equipped with a current control circuit in a burst read operationHITACHI LTD·Filed 2007·Granted Feb 10, 2009·18 cites·8 claims
- 2290US5604365ASemiconductor integrated circuit device and a manufacturing method thereofHITACHI LTD·Filed 1994·Granted Feb 18, 1997·66 cites·16 claims
- 2389US8320208B2Sense amplifier circuit and semiconductor deviceKAJIGAYA KAZUHIKO·Filed 2010·Granted Nov 27, 2012·10 cites·28 claims
- 2489US8295101B2Semiconductor deviceKAJIGAYA KAZUHIKO·Filed 2011·Granted Oct 23, 2012·11 cites·24 claims
- 2589US7154788B2Semiconductor integrated circuit deviceELPIDA MEMORY INC·Filed 2004·Granted Dec 26, 2006·36 cites·13 claims
- 2688US9601183B1Apparatuses and methods for controlling wordlines and sense amplifiersMICRON TECHNOLOGY INC·Filed 2016·Granted Mar 21, 2017·7 cites·20 claims
- 2788US8199559B2Semiconductor device, semiconductor memory device and data processing system comprising semiconductor systemKAJIGAYA KAZUHIKO·Filed 2010·Granted Jun 12, 2012·10 cites·20 claims
- 2888US7969765B2Sense amplifier for semiconductor memory deviceELPIDA MEMORY INC·Filed 2008·Granted Jun 28, 2011·11 cites·5 claims
- 2988US7773447B2Memory circuit, semiconductor device and read control method of memory circuitELPIDA MEMORY INC·Filed 2007·Granted Aug 10, 2010·15 cites·17 claims
- 3087US10002666B2FeRAM-DRAM hybrid memoryMICRON TECHNOLOGY INC·Filed 2017·Granted Jun 19, 2018·5 cites·20 claims
- 3187US7554147B2Memory device and manufacturing method thereofELPIDA MEMORY INC·Filed 2006·Granted Jun 30, 2009·16 cites·4 claims
- 3287US7499340B2Semiconductor memory device and defect remedying method thereofHITACHI LTD·Filed 2008·Granted Mar 3, 2009·8 cites·18 claims
- 3387US7193884B2Semiconductor memory deviceELPIDA MEMORY INC·Filed 2005·Granted Mar 20, 2007·12 cites·23 claims
- 3487US6411543B2Dynamic random access memory (RAM), semiconductor storage device, and semiconductor integrated circuit (IC) deviceHITACHI LTD·Filed 2001·Granted Jun 25, 2002·43 cites·18 claims
- 3586US10381102B2Memory devices having a read function of data stored in a plurality of reference cellsMICRON TECHNOLOGY INC·Filed 2015·Granted Aug 13, 2019·4 cites·21 claims
- 3686US8873307B2Semiconductor deviceKAJIGAYA KAZUHIKO·Filed 2012·Granted Oct 28, 2014·8 cites·10 claims
- 3786US8867294B2Semiconductor device, refresh control method thereof and computer systemKAJIGAYA KAZUHIKO·Filed 2014·Granted Oct 21, 2014·8 cites·21 claims
- 3886US8068369B2Sense amplifier circuit and semiconductor memory deviceKAJIGAYA KAZUHIKO·Filed 2009·Granted Nov 29, 2011·16 cites·18 claims
- 3986US7072202B2Semiconductor device having a power down modeHITACHI LTD·Filed 2005·Granted Jul 4, 2006·10 cites·20 claims
- 4085US7903449B2Semiconductor memory deviceELPIDA MEMORY INC·Filed 2009·Granted Mar 8, 2011·11 cites·20 claims
- 4185US7082074B2Semiconductor device having a power down modeHITACHI LTD·Filed 2005·Granted Jul 25, 2006·9 cites·10 claims
- 4285US6515913B2Semiconductor memory device and defect remedying method thereofHITACHI LTD·Filed 2001·Granted Feb 4, 2003·22 cites·5 claims
- 4385US6201728B1Dynamic RAM, semiconductor storage device, and semiconductor integrated circuit deviceHITACHI LTD·Filed 1996·Granted Mar 13, 2001·60 cites·23 claims
- 4484US8520449B2Semiconductor device and control method thereofKAJIGAYA KAZUHIKO·Filed 2011·Granted Aug 27, 2013·9 cites·20 claims
- 4584US8472272B2Semiconductor device having hierarchical bit line structureKAJIGAYA KAZUHIKO·Filed 2011·Granted Jun 25, 2013·9 cites·18 claims
- 4684US8310887B2Semiconductor device having single-ended sensing amplifierKAJIGAYA KAZUHIKO·Filed 2011·Granted Nov 13, 2012·7 cites·31 claims
- 4784US7449711B2Phase-change-type semiconductor memory deviceELPIDA MEMORY INC·Filed 2006·Granted Nov 11, 2008·13 cites·17 claims
- 4884US7289346B2Semiconductor integrated circuitELPIDA MEMORY INC·Filed 2006·Granted Oct 30, 2007·7 cites·10 claims
- 4984US6584031B2Semiconductor integrated circuit deviceHITACHI LTD·Filed 2002·Granted Jun 24, 2003·26 cites·3 claims
- 5084US6335884B1Semiconductor memory device and defect remedying method thereofHITACHI LTD·Filed 2000·Granted Jan 1, 2002·22 cites·5 claims
Showing the top 50 of 259 patent records by PatentIndex Score.
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