Masukazu IGARASHI

Person

Kawagoe, JP

People

Patents Grantslast 30 patents

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
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
Symmetrical STO for oscillation with both polarity bias
- Patent number 9,311,934
- Issue date Apr 12, 2016
- HGST Netherlands B.V.
- Masato Shiimoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Microwave-assisted magnetic recording device and method of formatio...
- Patent number 9,305,586
- Issue date Apr 5, 2016
- HGST Netherlands B.V.
- Masafumi Mochizuki
- 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, magnetic recording method and apparatus for controll...
- Patent number 9,275,672
- Issue date Mar 1, 2016
- Hitachi, Ltd.
- Yoshihiro Shiroishi
- 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
Microwave-assisted magnetic recording (MAMR) head employing advance...
- Patent number 9,007,723
- Issue date Apr 14, 2015
- HGST Netherlands B.V.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
High frequency magnetic field assisted magnetic recording head
- Patent number 9,007,722
- Issue date Apr 14, 2015
- Hitachi, Ltd.
- Junichiro Shimizu
- G11 - INFORMATION STORAGE
Information Patent Grant
Microwave assisted magnetic recording head having spin torque oscil...
- Patent number 9,007,721
- Issue date Apr 14, 2015
- Hitachi, Ltd.
- Yo Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Microwave assisted magnetic recording head and magnetic data storag...
- Patent number 8,937,789
- Issue date Jan 20, 2015
- Hitachi, Ltd.
- Katsuro Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Microwave assisted magnetic recording medium and information record...
- Patent number 8,883,327
- Issue date Nov 11, 2014
- Hitachi, Ltd.
- Yoshiyuki Hirayama
- 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
Magnetic head and magnetic recording/reproducing apparatus
- Patent number 8,854,768
- Issue date Oct 7, 2014
- Hitachi, Ltd.
- Kenji Sugiura
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head, method for producing the magnetic head, and magnetic...
- Patent number 8,830,627
- Issue date Sep 9, 2014
- Hitachi, Ltd.
- Kenji Sugiura
- G11 - INFORMATION STORAGE
Information Patent Grant
Energy-assisted magnetic recording head and magnetic recording device
- Patent number 8,810,946
- Issue date Aug 19, 2014
- Hitachi, Ltd.
- Kan Yasui
- G11 - INFORMATION STORAGE
Information Patent Grant
Microwave assisted magnetic recording head and microwave assisted m...
- Patent number 8,760,806
- Issue date Jun 24, 2014
- Hitachi, Ltd.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording device having high-frequency field generating...
- Patent number 8,724,260
- Issue date May 13, 2014
- Hitachi, Ltd.
- Masukazu Igarashi
- 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
Microwave-assisted magnetic recording head and magnetic read/write...
- Patent number 8,582,225
- Issue date Nov 12, 2013
- Hitachi, Ltd.
- Masato Shiimoto
- 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
Microwave-assisted magnetic recording device and method of formatio...
- Patent number 8,363,355
- Issue date Jan 29, 2013
- Hitachi Global Storage Technologies Netherlands B.V.
- Masafumi Mochizuki
- G11 - INFORMATION STORAGE
Information Patent Grant
Thermally assisted recording media and system
- Patent number 8,089,829
- Issue date Jan 3, 2012
- Hitachi, Ltd.
- Fumiko Akagi
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Thermally assisted recording system
- Patent number 7,813,071
- Issue date Oct 12, 2010
- Hitachi Global Storage Technologies Netherlands B.V.
- Fumiko Akagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Thermally assisted recording system
- Patent number 7,446,969
- Issue date Nov 4, 2008
- Hitachi Global Storage Technologies Netherlands B.V.
- Fumiko Akagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording equalizer and magnetic recording/reproducing apparatus us...
- Patent number 6,728,051
- Issue date Apr 27, 2004
- Hitachi, Ltd.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording system including magnetic recording medium havin...
- Patent number 6,671,116
- Issue date Dec 30, 2003
- Hitachi, Ltd.
- Fumiko Akagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 6,635,367
- Issue date Oct 21, 2003
- Hitachi, Ltd.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

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
MAGNETIC HEAD AND MAGNETIC RECORDING/REPRODUCING APPARATUS
- Publication number 20140211340
- Publication date Jul 31, 2014
- Hitachi, Ltd
- Kenji SUGIURA
- 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
HIGH FREQUENCY MAGNETIC FIELD ASSISTED MAGNETIC RECORDING HEAD
- Publication number 20140063658
- Publication date Mar 6, 2014
- Hitachi, Ltd
- Junichiro SHIMIZU
- G11 - INFORMATION STORAGE
Information Patent Application
MICROWAVE ASSISTED MAGNETIC RECORDING HEAD HAVING SPIN TORQUE OSCIL...
- Publication number 20140036387
- Publication date Feb 6, 2014
- Hitachi, Ltd
- Yo SATO
- G11 - INFORMATION STORAGE
Information Patent Application
MICROWAVE ASSISTED MAGNETIC RECORDING HEAD AND MAGNETIC DATA STORAG...
- Publication number 20130329316
- Publication date Dec 12, 2013
- Katsuro WATANABE
- G11 - INFORMATION STORAGE
Information Patent Application
MICROWAVE ASSISTED MAGNETIC RECORDING MEDIUM AND INFORMATION RECORD...
- Publication number 20130293983
- Publication date Nov 7, 2013
- Hitachi, Ltd
- Yoshiyuki HIRAYAMA
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC HEAD, MAGNETIC RECORDING METHOD AND APPARATUS FOR CONTROLL...
- Publication number 20130229895
- Publication date Sep 5, 2013
- Hitachi, Ltd
- Yoshihiro SHIROISHI
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC HEAD, METHOD FOR PRODUCING THE MAGNETIC HEAD, AND MAGNETIC...
- Publication number 20130222941
- Publication date Aug 29, 2013
- Hitachi, Ltd
- Kenji SUGIURA
- 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
MICROWAVE-ASSISTED MAGNETIC RECORDING DEVICE AND METHOD OF FORMATIO...
- Publication number 20130114384
- Publication date May 9, 2013
- HGST NETHERLANDS B.V.
- Masafumi Mochizuki
- 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
ENERGY-ASSISTED MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING DEVICE
- Publication number 20130028058
- Publication date Jan 31, 2013
- Kan Yasui
- 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
INFORMATION RECORDING DEVICE
- Publication number 20110216436
- Publication date Sep 8, 2011
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
MICROWAVE ASSISTED MAGNETIC RECORDING HEAD AND MICROWAVE ASSISTED M...
- Publication number 20110043943
- Publication date Feb 24, 2011
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
MICROWAVE-ASSISTED MAGNETIC RECORDING DEVICE AND METHOD OF FORMATIO...
- Publication number 20100195247
- Publication date Aug 5, 2010
- Masafumi Mochizuki
- G11 - INFORMATION STORAGE
Information Patent Application
THERMALLY ASSISTED RECORDING MEDIA AND SYSTEM
- Publication number 20100110576
- Publication date May 6, 2010
- Hitachi, Ltd.
- Fumiko AKAGI
- G11 - INFORMATION STORAGE
Information Patent Application
Thermally assisted recording system
- Publication number 20090040646
- Publication date Feb 12, 2009
- Hitachi Global Storage Technologies Netherlands B.V.
- Fumiko Akagi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording media, its fabrication technique, and hard disk...
- Publication number 20070116989
- Publication date May 24, 2007
- Hiroshi Ikekame
- G11 - INFORMATION STORAGE
Information Patent Application
Thermally assisted recording system
- Publication number 20050259343
- Publication date Nov 24, 2005
- Hitachi Global Storage Technologies Netherlands B.V.
- Fumiko Akagi
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular magnetic recording medium
- Publication number 20040146747
- Publication date Jul 29, 2004
- Hitachi, Ltd.
- Hiroaki Nemoto
- G11 - INFORMATION STORAGE
Information Patent Application
Recording equalizer and magnetic recording/reproducing apparatus us...
- Publication number 20030142430
- Publication date Jul 31, 2003
- Hitachi, Ltd.
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
Recording equalizer and magnetic recording/reproducing apparatus us...
- Publication number 20030026024
- Publication date Feb 6, 2003
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording medium and magnetic storage device using the same
- Publication number 20020146592
- Publication date Oct 10, 2002
- Masaaki Futamoto
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Magnetic recording medium
- Publication number 20020132140
- Publication date Sep 19, 2002
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
Recording equalizer and magnetic recording/reproducing apparatus us...
- Publication number 20020114093
- Publication date Aug 22, 2002
- Masukazu Igarashi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording system including magnetic recording medium havin...
- Publication number 20020089771
- Publication date Jul 11, 2002
- Fumiko Akagi
- G11 - INFORMATION STORAGE

Masukazu IGARASHI

Person

Patents Grantslast 30 patents

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

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

Extended spin torque oscillator

Symmetrical STO for oscillation with both polarity bias

Microwave-assisted magnetic recording device and method of formatio...

Negative-polarization spin-torque-oscillator

Magnetic head, magnetic recording method and apparatus for controll...

Low Bs spin-polarizer for spin torque oscillator

Stabilizing layer for a spin torque oscillator (STO)

Microwave-assisted magnetic recording (MAMR) head employing advance...

High frequency magnetic field assisted magnetic recording head

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

Microwave assisted magnetic recording head and magnetic data storag...

Microwave assisted magnetic recording medium and information record...

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

Magnetic head and magnetic recording/reproducing apparatus

Magnetic head, method for producing the magnetic head, and magnetic...

Energy-assisted magnetic recording head and magnetic recording device

Microwave assisted magnetic recording head and microwave assisted m...

Information recording device having high-frequency field generating...

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

Microwave-assisted magnetic recording head and magnetic read/write...

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

Microwave-assisted magnetic recording device and method of formatio...

Thermally assisted recording media and system

Thermally assisted recording system

Thermally assisted recording system

Recording equalizer and magnetic recording/reproducing apparatus us...

Magnetic recording system including magnetic recording medium havin...

Magnetic recording medium

Patents Applicationslast 30 patents

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

NEGATIVE-PORALIZATION SPIN-TORQUE-OSCILLATOR

EXTENDED SPIN TORQUE OSCILLATOR

MAGNETIC HEAD AND MAGNETIC RECORDING/REPRODUCING APPARATUS

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

HIGH FREQUENCY MAGNETIC FIELD ASSISTED MAGNETIC RECORDING HEAD

MICROWAVE ASSISTED MAGNETIC RECORDING HEAD HAVING SPIN TORQUE OSCIL...

MICROWAVE ASSISTED MAGNETIC RECORDING HEAD AND MAGNETIC DATA STORAG...

MICROWAVE ASSISTED MAGNETIC RECORDING MEDIUM AND INFORMATION RECORD...

MAGNETIC HEAD, MAGNETIC RECORDING METHOD AND APPARATUS FOR CONTROLL...

MAGNETIC HEAD, METHOD FOR PRODUCING THE MAGNETIC HEAD, AND MAGNETIC...

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

MICROWAVE-ASSISTED MAGNETIC RECORDING DEVICE AND METHOD OF FORMATIO...

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS

ENERGY-ASSISTED MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING DEVICE

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

INFORMATION RECORDING DEVICE

MICROWAVE ASSISTED MAGNETIC RECORDING HEAD AND MICROWAVE ASSISTED M...

MICROWAVE-ASSISTED MAGNETIC RECORDING DEVICE AND METHOD OF FORMATIO...

THERMALLY ASSISTED RECORDING MEDIA AND SYSTEM

Thermally assisted recording system

Magnetic recording media, its fabrication technique, and hard disk...

Thermally assisted recording system

Perpendicular magnetic recording medium

Recording equalizer and magnetic recording/reproducing apparatus us...

Recording equalizer and magnetic recording/reproducing apparatus us...

Magnetic recording medium and magnetic storage device using the same

Magnetic recording medium

Recording equalizer and magnetic recording/reproducing apparatus us...

Magnetic recording system including magnetic recording medium havin...