Keiichi Nagasaka

Person

Isehara-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Low magnetic flux density interface layer for spin torque oscillator
- Patent number 10,037,772
- Issue date Jul 31, 2018
- Western Digital Technologies, Inc.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Texture-control layer for spin torque oscillator
- Patent number 9,990,943
- Issue date Jun 5, 2018
- Western Digital Technologies, Inc.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Microwave assisted magnetic recording head having spin torque oscil...
- Patent number 9,858,952
- Issue date Jan 2, 2018
- Western Digital Technologies, Inc.
- Masashige Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Low magnetic flux density interface layer for spin torque oscillator
- Patent number 9,805,746
- Issue date Oct 31, 2017
- Western Digital Technologies, Inc.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Texture-control layer for spin torque oscillator
- Patent number 9,728,210
- Issue date Aug 8, 2017
- Western Digital Technologies, Inc.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Spin torque oscillator with high spin torque efficiency and reliabi...
- Patent number 9,437,222
- Issue date Sep 6, 2016
- HGST Netherlands B.V.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Grant
AF-mode STO with negative Hk spin polarization layer
- Patent number 9,406,315
- Issue date Aug 2, 2016
- HGST Netherlands B.V.
- Masato Shiimoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Spin torque oscillator with low magnetic moment and high perpendicu...
- Patent number 9,378,759
- Issue date Jun 28, 2016
- HGST Netherlands B.V.
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Extended spin torque oscillator
- Patent number 9,336,797
- Issue date May 10, 2016
- HGST Netherlands B.V.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Negative-polarization spin-torque-oscillator
- Patent number 9,305,574
- Issue date Apr 5, 2016
- HGST Netherlands B.V.
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having a spin torque oscillator (STO) with a hybrid h...
- Patent number 9,230,597
- Issue date Jan 5, 2016
- HGST Netherlands B.V.
- Masato Shimoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Low Bs spin-polarizer for spin torque oscillator
- Patent number 9,230,569
- Issue date Jan 5, 2016
- HGST Netherlands B.V.
- Masato Shimoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Stabilizing layer for a spin torque oscillator (STO)
- Patent number 9,099,107
- Issue date Aug 4, 2015
- HGST Netherlands B.V.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
MAMR head with a multi-layered side gap for stable oscillation of t...
- Patent number 8,988,826
- Issue date Mar 24, 2015
- HGST Netherlands B.V.
- Mikito Sugiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Hard disk drive with write assist based on detected conditions
- Patent number 8,982,502
- Issue date Mar 17, 2015
- HGST Netherlands B.V.
- Akira Morinaga
- G11 - INFORMATION STORAGE
Information Patent Grant
Spin-torque oscillator for microwave assisted magnetic recording
- Patent number 8,970,996
- Issue date Mar 3, 2015
- HSGT Netherlands B.V.
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
High spin-torque efficiency spin-torque oscillator (STO) with dual...
- Patent number 8,879,205
- Issue date Nov 4, 2014
- HGST Netherlands B.V.
- Masato Shiimoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Spin-torque oscillator for microwave assisted magnetic recording
- Patent number 8,773,822
- Issue date Jul 8, 2014
- Hitachi, Ltd.
- Masato Matsubara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording apparatus with magnetic recording head capable o...
- Patent number 8,687,319
- Issue date Apr 1, 2014
- Hitachi, Ltd.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Spin-torque oscillator (STO) for microwave-assisted magnetic record...
- Patent number 8,547,656
- Issue date Oct 1, 2013
- HGST Netherlands B.V.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording head and magnetic recording/reproducing apparatus
- Patent number 8,537,497
- Issue date Sep 17, 2013
- Hitachi, Ltd.
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Spin torque oscillator and magnetic recording head and magnetic rec...
- Patent number 8,345,380
- Issue date Jan 1, 2013
- Hitachi, Ltd.
- Yo Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
CPP spin-valve element
- Patent number 7,538,987
- Issue date May 26, 2009
- University of Alabama
- Hideo Fujiwara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetoresistive element having current-perpendicular-to-plane stru...
- Patent number 7,450,351
- Issue date Nov 11, 2008
- Fujitsu Limited
- Hirotaka Oshima
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetoresistive element and method of manufacturing the same
- Patent number 7,433,160
- Issue date Oct 7, 2008
- Fujitsu Limited
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
CPP magnetoresistive effect element and magnetic storage device hav...
- Patent number 7,428,127
- Issue date Sep 23, 2008
- Fujitsu Limited
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetoresistive effect having multiple base layers between an elec...
- Patent number 7,342,751
- Issue date Mar 11, 2008
- Fujitsu Limited
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetoresistive element
- Patent number 7,180,713
- Issue date Feb 20, 2007
- Fujitsu Limited
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetoresistive sensor
- Patent number 7,116,533
- Issue date Oct 3, 2006
- Fujitsu Limited
- Yoshihiko Seyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetoresistive element having current-perpendicular-to-the-plane...
- Patent number 7,116,528
- Issue date Oct 3, 2006
- Fujitsu Limited
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
LOW MAGNETIC FLUX DENSITY INTERFACE LAYER FOR SPIN TORQUE OSCILLATOR
- Publication number 20180025746
- Publication date Jan 25, 2018
- Western Digital Technologies, Inc.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Application
TEXTURE-CONTROL LAYER FOR SPIN TORQUE OSCILLATOR
- Publication number 20170365282
- Publication date Dec 21, 2017
- Western Digital Technologies, Inc.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Application
TEXTURE-CONTROL LAYER FOR SPIN TORQUE OSCILLATOR
- Publication number 20170148474
- Publication date May 25, 2017
- HGST NETHERLANDS B.V.
- Susumu Okamura
- G11 - INFORMATION STORAGE
Information Patent Application
SPIN TORQUE OSCILLATOR WITH LOW MAGNETIC MOMENT AND HIGH PERPENDICU...
- Publication number 20160148627
- Publication date May 26, 2016
- HGST NETHERLANDS B.V.
- Keiichi NAGASAKA
- G11 - INFORMATION STORAGE
Information Patent Application
NEGATIVE-PORALIZATION SPIN-TORQUE-OSCILLATOR
- Publication number 20160086623
- Publication date Mar 24, 2016
- HGST NETHERLANDS B.V.
- Keiichi NAGASAKA
- G11 - INFORMATION STORAGE
Information Patent Application
EXTENDED SPIN TORQUE OSCILLATOR
- Publication number 20150348574
- Publication date Dec 3, 2015
- HGST NETHERLANDS B.V.
- Masukazu IGARASHI
- G11 - INFORMATION STORAGE
Information Patent Application
AF-MODE STO WITH NEGATIVE HK SPIN POLARIZATION LAYER
- Publication number 20150228295
- Publication date Aug 13, 2015
- HGST NETHERLANDS B.V.
- Masato SHIIMOTO
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC HEAD HAVING A SPIN TORQUE OSCILLATOR (STO) WITH A HYBRID H...
- Publication number 20150124347
- Publication date May 7, 2015
- HGST NETHERLANDS B.V.
- Masato Shimoto
- G11 - INFORMATION STORAGE
Information Patent Application
STO WITH ANTI-FERROMAGNETIC COUPLING INTERLAYER
- Publication number 20150103431
- Publication date Apr 16, 2015
- HGST NETHERLANDS B.V.
- Masukaza IGARASHI
- G11 - INFORMATION STORAGE
Information Patent Application
MAMR HEAD WITH A MULTI-LAYERED SIDE GAP FOR STABLE OSCILLATION OF T...
- Publication number 20140177100
- Publication date Jun 26, 2014
- HGST NETHERLANDS B.V.
- Mikito Sugiyama
- G11 - INFORMATION STORAGE
Information Patent Application
HIGH SPIN-TORQUE EFFICIENCY SPIN-TORQUE OSCILLATOR (STO) WITH DUAL...
- Publication number 20140133048
- Publication date May 15, 2014
- HGST NETHERLANDS B.V.
- Masato Shiimoto
- G11 - INFORMATION STORAGE
Information Patent Application
SPIN-TORQUE OSCILLATOR FOR MICROWAVE ASSISTED MAGNETIC RECORDING
- Publication number 20140085753
- Publication date Mar 27, 2014
- HGST NETHERLANDS B.V.
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Application
SPIN-TORQUE OSCILLATOR (STO) FOR MICROWAVE-ASSISTED MAGNETIC RECORD...
- Publication number 20130215530
- Publication date Aug 22, 2013
- Hitachi Global Storage Technologies Netherlands B.V.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
HARD DISK DRIVE WITH WRITE ASSIST BASED ON DETECTED CONDITIONS
- Publication number 20130148234
- Publication date Jun 13, 2013
- Hitachi Global Storage Technologies Netherlands B.V.
- Akira Morinaga
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS
- Publication number 20130070367
- Publication date Mar 21, 2013
- Hitachi, Ltd.
- Masukazu IGARASHI
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING/REPRODUCING APPARATUS
- Publication number 20130050869
- Publication date Feb 28, 2013
- Hitachi, Ltd.
- Keiichi NAGASAKA
- G11 - INFORMATION STORAGE
Information Patent Application
SPIN-TORQUE OSCILLATOR FOR MICROWAVE ASSISTED MAGNETIC RECORDING
- Publication number 20120120518
- Publication date May 17, 2012
- Hitachi, Ltd.
- Masato Matsubara
- G11 - INFORMATION STORAGE
Information Patent Application
OSCILLATOR IN WHICH POLARITY IS CHANGED AT HIGH SPEED, MAGNETIC HEA...
- Publication number 20120113542
- Publication date May 10, 2012
- Hitachi, Ltd.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
SPIN TORQUE OSCILLATOR AND MAGNETIC RECORDING HEAD AND MAGNETIC REC...
- Publication number 20120069465
- Publication date Mar 22, 2012
- Hitachi, Ltd
- Yo SATO
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC WIRE UNIT AND STORAGE DEVICE
- Publication number 20100061135
- Publication date Mar 11, 2010
- Fujitsu Limited
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Application
THERMALLY ASSISTED MAGNETIC RECORDING METHOD, MAGNETIC RECORDING HE...
- Publication number 20100053794
- Publication date Mar 4, 2010
- Fujitsu Limited
- Hideki Mashima
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC THIN LINE AND MEMORY DEVICE
- Publication number 20100054033
- Publication date Mar 4, 2010
- Fujitsu Limited
- Takao Ochiai
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC MEMORY ELEMENT, AND METHOD OF MANUFACTURING MEMORY ELEMENT
- Publication number 20090323406
- Publication date Dec 31, 2009
- Fujitsu Limited
- Takao Ochiai
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETORESISTIVE ELEMENT, METHOD OF MANUFACTURING THE SAME, AND MAG...
- Publication number 20080080097
- Publication date Apr 3, 2008
- Fujitsu Limited
- Keiichi NAGASAKA
- G01 - MEASURING TESTING
Information Patent Application
Magnetoresistive effect device and method of manufacturing ferromag...
- Publication number 20070217083
- Publication date Sep 20, 2007
- FUJITSU LIMITED
- Keiichi Nagasaka
- G01 - MEASURING TESTING
Information Patent Application
Magnetoresistive effect element, magnetic head, magnetic storage de...
- Publication number 20070048485
- Publication date Mar 1, 2007
- FUJITSU LIMITED
- Arata Jogo
- G01 - MEASURING TESTING
Information Patent Application
Magnetoresistive element, magnetic head, and magnetic memory apparatus
- Publication number 20060209473
- Publication date Sep 21, 2006
- FUJITSU LIMITED
- Hirotaka Oshima
- G01 - MEASURING TESTING
Information Patent Application
Magnetoresistive element and method of manufacturing the same
- Publication number 20060209471
- Publication date Sep 21, 2006
- FUJITSU LIMITED
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE
Information Patent Application
SPIN VALVE MAGNETORESISTIVE SENSOR HAVING CPP STRUCTURE
- Publication number 20060119989
- Publication date Jun 8, 2006
- Yoshihiko Seyama
- G01 - MEASURING TESTING
Information Patent Application
Magnetoresistive effect element, magnetic head, and magnetic record...
- Publication number 20060092577
- Publication date May 4, 2006
- FUJITSU LIMITED
- Keiichi Nagasaka
- G11 - INFORMATION STORAGE

Keiichi Nagasaka

Person

Patents Grantslast 30 patents

Low magnetic flux density interface layer for spin torque oscillator

Texture-control layer for spin torque oscillator

Microwave assisted magnetic recording head having spin torque oscil...

Low magnetic flux density interface layer for spin torque oscillator

Texture-control layer for spin torque oscillator

Spin torque oscillator with high spin torque efficiency and reliabi...

AF-mode STO with negative Hk spin polarization layer

Spin torque oscillator with low magnetic moment and high perpendicu...

Extended spin torque oscillator

Negative-polarization spin-torque-oscillator

Magnetic head having a spin torque oscillator (STO) with a hybrid h...

Low Bs spin-polarizer for spin torque oscillator

Stabilizing layer for a spin torque oscillator (STO)

MAMR head with a multi-layered side gap for stable oscillation of t...

Hard disk drive with write assist based on detected conditions

Spin-torque oscillator for microwave assisted magnetic recording

High spin-torque efficiency spin-torque oscillator (STO) with dual...

Spin-torque oscillator for microwave assisted magnetic recording

Magnetic recording apparatus with magnetic recording head capable o...

Spin-torque oscillator (STO) for microwave-assisted magnetic record...

Magnetic recording head and magnetic recording/reproducing apparatus

Spin torque oscillator and magnetic recording head and magnetic rec...

CPP spin-valve element

Magnetoresistive element having current-perpendicular-to-plane stru...

Magnetoresistive element and method of manufacturing the same

CPP magnetoresistive effect element and magnetic storage device hav...

Magnetoresistive effect having multiple base layers between an elec...

Magnetoresistive element

Magnetoresistive sensor

Magnetoresistive element having current-perpendicular-to-the-plane...

Patents Applicationslast 30 patents

LOW MAGNETIC FLUX DENSITY INTERFACE LAYER FOR SPIN TORQUE OSCILLATOR

TEXTURE-CONTROL LAYER FOR SPIN TORQUE OSCILLATOR

TEXTURE-CONTROL LAYER FOR SPIN TORQUE OSCILLATOR

SPIN TORQUE OSCILLATOR WITH LOW MAGNETIC MOMENT AND HIGH PERPENDICU...

NEGATIVE-PORALIZATION SPIN-TORQUE-OSCILLATOR

EXTENDED SPIN TORQUE OSCILLATOR

AF-MODE STO WITH NEGATIVE HK SPIN POLARIZATION LAYER

MAGNETIC HEAD HAVING A SPIN TORQUE OSCILLATOR (STO) WITH A HYBRID H...

STO WITH ANTI-FERROMAGNETIC COUPLING INTERLAYER

MAMR HEAD WITH A MULTI-LAYERED SIDE GAP FOR STABLE OSCILLATION OF T...

HIGH SPIN-TORQUE EFFICIENCY SPIN-TORQUE OSCILLATOR (STO) WITH DUAL...

SPIN-TORQUE OSCILLATOR FOR MICROWAVE ASSISTED MAGNETIC RECORDING

SPIN-TORQUE OSCILLATOR (STO) FOR MICROWAVE-ASSISTED MAGNETIC RECORD...

HARD DISK DRIVE WITH WRITE ASSIST BASED ON DETECTED CONDITIONS

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING/REPRODUCING APPARATUS

SPIN-TORQUE OSCILLATOR FOR MICROWAVE ASSISTED MAGNETIC RECORDING

OSCILLATOR IN WHICH POLARITY IS CHANGED AT HIGH SPEED, MAGNETIC HEA...

SPIN TORQUE OSCILLATOR AND MAGNETIC RECORDING HEAD AND MAGNETIC REC...

MAGNETIC WIRE UNIT AND STORAGE DEVICE

THERMALLY ASSISTED MAGNETIC RECORDING METHOD, MAGNETIC RECORDING HE...

MAGNETIC THIN LINE AND MEMORY DEVICE

MAGNETIC MEMORY ELEMENT, AND METHOD OF MANUFACTURING MEMORY ELEMENT

MAGNETORESISTIVE ELEMENT, METHOD OF MANUFACTURING THE SAME, AND MAG...

Magnetoresistive effect device and method of manufacturing ferromag...

Magnetoresistive effect element, magnetic head, magnetic storage de...

Magnetoresistive element, magnetic head, and magnetic memory apparatus

Magnetoresistive element and method of manufacturing the same

SPIN VALVE MAGNETORESISTIVE SENSOR HAVING CPP STRUCTURE

Magnetoresistive effect element, magnetic head, and magnetic record...