Inventor · disambiguated record
Atsushi Iijima
Also filed as: IIJIMA ATSUSHI
112 granted patents·7 pending applications·1,009 citations·filing 1991–2021
99Inventor score
Files withSASAKI YOSHITAKA60TDK CORP24SAE MAGNETICS HK LTD11HEADWAY TECHNOLOGIES INC10HEADWAY TECH INC3
Top patents by PatentIndex Score
119 records- 0196US8749919B2Magnetic head for perpendicular magnetic recording with shield around main poleSASAKI YOSHITAKA·Filed 2010·Granted Jun 10, 2014·56 cites·7 claims
- 0296US8618646B2Layered chip package and method of manufacturing sameSASAKI YOSHITAKA·Filed 2010·Granted Dec 31, 2013·32 cites·26 claims
- 0396US8477452B2Magnetic head for perpendicular magnetic recording having a tapered main poleSASAKI YOSHITAKA·Filed 2010·Granted Jul 2, 2013·48 cites·6 claims
- 0496US8310787B1Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk driveSASAKI YOSHITAKA·Filed 2011·Granted Nov 13, 2012·52 cites·18 claims
- 0596US8295008B1Magnetic head for perpendicular magnetic recording having a main pole and a shieldSASAKI YOSHITAKA·Filed 2011·Granted Oct 23, 2012·66 cites·9 claims
- 0695US8493687B2Magnetic head for perpendicular magnetic recording with shield around main poleSASAKI YOSHITAKA·Filed 2010·Granted Jul 23, 2013·40 cites·6 claims
- 0794US8218264B1Magnetic head for perpendicular magnetic recording having a main pole and two shieldsSASAKI YOSHITAKA·Filed 2010·Granted Jul 10, 2012·27 cites·6 claims
- 0894US8194511B2Heat-assisted magnetic recording head with near-field light generating elementSASAKI YOSHITAKA·Filed 2010·Granted Jun 5, 2012·28 cites·7 claims
- 0993US8416528B1Magnetic head for perpendicular magnetic recording having a return path sectionSASAKI YOSHITAKA·Filed 2012·Granted Apr 9, 2013·20 cites·12 claims
- 1093US8194510B2Heat-assisted magnetic recording head with near-field light generating elementSASAKI YOSHITAKA·Filed 2010·Granted Jun 5, 2012·23 cites·5 claims
- 1192US11295770B2Thin-film piezoelectric material substrate, thin-film piezoelectric material element, head gimbal assembly, ink jet head and method of manufacturing the thin-film piezoelectricSAE MAGNETICS HK LTD·Filed 2019·Granted Apr 5, 2022·2 cites·5 claims
- 1292US8012802B2Method of manufacturing layered chip packageHEADWAY TECHNOLOGIES INC·Filed 2010·Granted Sep 6, 2011·16 cites·7 claims
- 1391US8441755B2Magnetic head for perpendicular magnetic recording having a main pole, a shield and a coil core part setback away from the medium facing surface a specified distanceSASAKI YOSHITAKA·Filed 2011·Granted May 14, 2013·14 cites·7 claims
- 1491US8390955B1Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk driveSASAKI YOSHITAKA·Filed 2011·Granted Mar 5, 2013·14 cites·21 claims
- 1591US8345382B1Magnetic head for perpendicular magnetic recording having a main pole and a shield and specifically structured and located coil elements and magnetic coupling layersHEADWAY TECHNOLOGIES INC·Filed 2011·Granted Jan 1, 2013·16 cites·8 claims
- 1691US8345384B1Magnetic head for perpendicular magnetic recording having a main pole and a shieldHEADWAY TECHNOLOGIES INC·Filed 2011·Granted Jan 1, 2013·15 cites·9 claims
- 1791US8300357B1Magnetic head for perpendicular magnetic recording having a main pole and a shieldSASAKI YOSHITAKA·Filed 2011·Granted Oct 30, 2012·16 cites·11 claims
- 1891US8274759B1Magnetic head for perpendicular magnetic recording having a main pole and a shieldSASAKI YOSHITAKA·Filed 2011·Granted Sep 25, 2012·16 cites·7 claims
- 1990US6163436AThin film magnet head with improved performanceTDK CORP·Filed 1998·Granted Dec 19, 2000·65 cites·11 claims
- 2089US8659166B2Memory device, laminated semiconductor substrate and method of manufacturing the sameSASAKI YOSHITAKA·Filed 2010·Granted Feb 25, 2014·9 cites·9 claims
- 2189US7902677B1Composite layered chip package and method of manufacturing sameHEADWAY TECHNOLOGIES INC·Filed 2009·Granted Mar 8, 2011·17 cites·14 claims
- 2287US8498080B2Magnetic head for perpendicular magnetic recording that includes a sensor for detecting contact with a recording mediumSASAKI YOSHITAKA·Filed 2011·Granted Jul 30, 2013·9 cites·9 claims
- 2387US8065787B2Method of manufacturing a thermally assisted magnetic headSASAKI YOSHITAKA·Filed 2010·Granted Nov 29, 2011·8 cites·10 claims
- 2486US6400525B1Thin-film magnetic head and method of manufacturing sameTDK CORP·Filed 2000·Granted Jun 4, 2002·22 cites·5 claims
- 2585US8576514B2Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk driveSASAKI YOSHITAKA·Filed 2011·Granted Nov 5, 2013·8 cites·12 claims
- 2685US8426946B2Laminated semiconductor substrate, laminated chip package and method of manufacturing the sameSASAKI YOSHITAKA·Filed 2010·Granted Apr 23, 2013·8 cites·22 claims
- 2785US8203215B2Layered chip package and method of manufacturing sameSASAKI YOSHITAKA·Filed 2010·Granted Jun 19, 2012·8 cites·24 claims
- 2884US8867169B2Magnetic head for perpendicular magnetic recording having a main pole and a shieldSASAKI YOSHITAKA·Filed 2012·Granted Oct 21, 2014·7 cites·9 claims
- 2984US8107192B2Heat-assisted magnetic recording head with laser diode fixed to sliderSASAKI YOSHITAKA·Filed 2009·Granted Jan 31, 2012·5 cites·21 claims
- 3083US7915079B1Method of manufacturing layered chip packageHEADWAY TECHNOLOGIES INC·Filed 2010·Granted Mar 29, 2011·7 cites·6 claims
- 3182US6671135B2Thin film magnetic head recessed partially into substrate and including planarization layersTDK CORP·Filed 2003·Granted Dec 30, 2003·14 cites·7 claims
- 3282US6130805AThin film magnetic head having upper pole chip formed over insulating layerTDK CORP·Filed 1998·Granted Oct 10, 2000·37 cites·22 claims
- 3381US10276196B2Thin-film piezoelectric material substrate, thin-film piezoelectric material element, head gimbal assembly, ink jet head and method of manufacturing the thin-film piezoelectric material elementSAE MAGNETICS HK LTD·Filed 2015·Granted Apr 30, 2019·1 cites·5 claims
- 3481US9646637B1Thin-film piezoelectric material element, head gimbal assembly and hard disk driveSAE MAGNETICS HK LTD·Filed 2015·Granted May 9, 2017·5 cites·11 claims
- 3581US8362602B2Layered chip package and method of manufacturing sameHEADWAY TECHNOLOGIES INC·Filed 2010·Granted Jan 29, 2013·6 cites·22 claims
- 3680US8248894B2Thermally-assisted magnetic recording head having heat radiation layer and interposed layerSASAKI YOSHITAKA·Filed 2010·Granted Aug 21, 2012·5 cites·18 claims
- 3780US6577475B1Thin-film magnetic head having reduced yoke length and method of manufacturing sameTDK CORP·Filed 2000·Granted Jun 10, 2003·14 cites·24 claims
- 3880US6469876B1Thin-film magnetic head and method of manufacturing sameTDK CORP·Filed 2000·Granted Oct 22, 2002·14 cites·24 claims
- 3980US6353995B1Thin film mangetic head and method of manufacturing sameTDK CORP·Filed 1999·Granted Mar 12, 2002·33 cites·2 claims
- 4079US7915083B1Method of manufacturing layered chip packageHEADWAY TECHNOLOGIES INC·Filed 2009·Granted Mar 29, 2011·8 cites·4 claims
- 4178US8203216B2Layered chip package and method of manufacturing sameSASAKI YOSHITAKA·Filed 2010·Granted Jun 19, 2012·5 cites·19 claims
- 4278US8077433B2Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk driveSASAKI YOSHITAKA·Filed 2008·Granted Dec 13, 2011·3 cites·20 claims
- 4377US8358487B2Thin-film magnetic head having coil of varying thinknesses in spaces adjacent the main magnetic poleHEADWAY TECHNOLOGIES INC·Filed 2011·Granted Jan 22, 2013·4 cites·14 claims
- 4476US8426948B2Laminated semiconductor wafer, laminated chip package and method of manufacturing the sameSASAKI YOSHITAKA·Filed 2010·Granted Apr 23, 2013·4 cites·22 claims
- 4576US7115048B2Iron head for a golf clubDAIWA SEIKO INC·Filed 2003·Granted Oct 3, 2006·25 cites·19 claims
- 4676US7067066B2Method of manufacturing thin film magnetic headTDK CORP·Filed 2003·Granted Jun 27, 2006·17 cites·14 claims
- 4775US8462482B2Ceramic capacitor and method of manufacturing sameSASAKI YOSHITAKA·Filed 2009·Granted Jun 11, 2013·7 cites·14 claims
- 4875US8358015B2Layered chip package and method of manufacturing sameHEADWAY TECHNOLOGIES INC·Filed 2011·Granted Jan 22, 2013·4 cites·8 claims
- 4975US6669855B2Method of manufacturing thin film magnetic headTDK CORP·Filed 2001·Granted Dec 30, 2003·9 cites·19 claims
- 5074US8824102B2Thin-film magnetic head with improved wide area track erasure (WATE), method of manufacturing the same, head gimbal assembly, and hard disk driveSASAKI YOSHITAKA·Filed 2011·Granted Sep 2, 2014·4 cites·12 claims
Showing the top 50 of 119 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →