Inventor · disambiguated record
Wipul Pemsiri Jayasekara
Also filed as: JAYASEKARA WIPUL · JAYASEKARA WIPUL P · JAYASEKARA WIPUL PEMSIRI
53 granted patents·4 pending applications·490 citations·filing 2001–2014
98Inventor score
Files withHITACHI GLOBAL STORAGE TECH38HITACHI GLOBAL STORAGE TECH NL8GILL HARDAYAL S3SANDISK 3D LLC2FREITAG JAMES MAC1
Top patents by PatentIndex Score
57 records- 0197US7295401B2Laminated side shield for perpendicular write head for improved performanceHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Nov 13, 2007·76 cites·59 claims
- 0295US7848065B2Magnetoresistive sensor having an anisotropic hard bias with high coercivityHITACHI GLOBAL STORAGE TECH NL·Filed 2006·Granted Dec 7, 2010·23 cites·10 claims
- 0394US7961440B2Current perpendicular to plane magnetoresistive sensor with reduced read gapHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Jun 14, 2011·27 cites·21 claims
- 0493US7881018B2Differential current perpendicular to plane giant magnetoresistive sensor structure having improved robustness against spin torque noiseHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Feb 1, 2011·16 cites·20 claims
- 0593US6833982B2Magnetic tunnel junction sensor with a free layer biased by longitudinal layers interfacing top surfaces of free layer extensions which extend beyond an active region of the sensorHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Dec 21, 2004·29 cites·24 claims
- 0691US9054308B1Plasma reduction method for modifying metal oxide stoichiometry in ReRAMSANDISK 3D LLC·Filed 2014·Granted Jun 9, 2015·10 cites·19 claims
- 0791US8266785B2Method for manufacturing a magnetoresistive sensor having a novel junction structure for improved track width definition and pinned layer stabilityFREITAG JAMES MAC·Filed 2007·Granted Sep 18, 2012·14 cites·9 claims
- 0890US7863911B2Test device and method for measurement of tunneling magnetoresistance properties of a manufacturable wafer by the current-in-plane-tunneling techniqueHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Jan 4, 2011·10 cites·20 claims
- 0989US7446979B2Laminated draped shield for CPP read sensorsHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Nov 4, 2008·24 cites·20 claims
- 1088US7623325B2Method for providing an endpoint layer for ion milling of top of read sensor having top lead connection and sensor formed therebyHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 24, 2009·8 cites·19 claims
- 1188US7562436B2Deposition defined trackwidth for very narrow trackwidth CPP deviceHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jul 21, 2009·18 cites·14 claims
- 1288US6930866B2Magnetic tunnel junction sensor having a longitudinal bias layer in contact with a free layerHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Aug 16, 2005·17 cites·2 claims
- 1387US7419610B2Method of partial depth material removal for fabrication of CPP read sensorHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 2, 2008·14 cites·22 claims
- 1486US8520424B2Composition of memory cell with resistance-switching layersKREUPL FRANZ·Filed 2011·Granted Aug 27, 2013·7 cites·26 claims
- 1586US7639456B2Double mill process for patterning current perpendicular to plane (CPP) magnetoresistive devices to minimize barrier shorting and barrier damageHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Dec 29, 2009·15 cites·14 claims
- 1686US7375931B2Magnetic recording head with ESD shunt traceHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted May 20, 2008·7 cites·25 claims
- 1785US7839607B2Method to reduce corner shunting during fabrication of CPP read headsHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Nov 23, 2010·4 cites·16 claims
- 1885US7652855B2Magnetic sensor with extended free layer and overlaid leadsHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jan 26, 2010·6 cites·17 claims
- 1985US6982042B2Ion bombardment of electrical lapping guides to decrease noise during lapping processHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jan 3, 2006·23 cites·25 claims
- 2084US7839606B2Magnetic head having oxidized read sensor edges to reduce sensor current shuntingHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Nov 23, 2010·5 cites·20 claims
- 2181US7640650B2Method of making a magnetoresistive reader structureHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Jan 5, 2010·11 cites·22 claims
- 2281US7333300B2Magnetoresistive device with lapping guide treated to eliminate magnetoresistive effect thereofHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Feb 19, 2008·17 cites·14 claims
- 2378US7848061B2Current perpendicular to plane (CPP) magnetoresistive sensor with back flux guideHITACHI GLOBAL STORAGE TECH NL·Filed 2006·Granted Dec 7, 2010·3 cites·23 claims
- 2477US7820455B2Method for manufacturing a tunnel junction magnetoresistive sensor with improved performance and having a CoFeB free layerHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 26, 2010·7 cites·11 claims
- 2576US8037593B2Method for manufacturing an ultra narrow gap magnetoresistive sensorHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Oct 18, 2011·5 cites·11 claims
- 2676US7123455B2Magnetic tunnel junction sensor with insulating antiferromagnetic material extending from free layer extensions to electrically conductive leadHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Oct 17, 2006·7 cites·3 claims
- 2773US8421050B2Electronic devices including carbon nano-tube films having carbon-based liners, and methods of forming the samePING ER-XUAN·Filed 2009·Granted Apr 16, 2013·4 cites·30 claims
- 2872US6996894B2Methods of making magnetic heads with improved contiguous junctionsHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Feb 14, 2006·8 cites·20 claims
- 2971US6995957B2Magnetoresistive sensor having a high resistance soft magnetic layer between sensor stack and shieldHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Feb 7, 2006·15 cites·13 claims
- 3070US8835892B2Electronic devices including carbon nano-tube films having boron nitride-based liners, and methods of forming the sameJAYASEKARA WIPUL PEMSIRI·Filed 2009·Granted Sep 16, 2014·6 cites·30 claims
- 3168US7574791B2Method to fabricate side shields for a magnetic sensorHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Aug 18, 2009·1 cites·21 claims
- 3268US7329362B2Dual angle milling for current perpendicular to plane (CPP) magnetoresistive sensor definitionHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Feb 12, 2008·5 cites·23 claims
- 3368US7251103B2Perpendicular pole having and adjacent non-magnetic CMP resistant structureHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jul 31, 2007·6 cites·18 claims
- 3468US7005242B2Magnetic head and method of making the same using an etch-stop layer for removing portions of the capping layerIBM·Filed 2002·Granted Feb 28, 2006·6 cites·15 claims
- 3567US7773349B2Tunnel MR head with long stripe height sensor stabilized through the shieldHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Aug 10, 2010·2 cites·11 claims
- 3666US7367110B2Method of fabricating a read head having shaped read sensor-biasing layer junctions using partial millingHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted May 6, 2008·8 cites·12 claims
- 3764US7444739B2Method for fabricating improved sensor for a magnetic head utilizing reactive ion milling processHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 4, 2008·3 cites·5 claims
- 3864US7035063B2Magnetic tunnel junction sensor with nickel-oxide longitudinal bias layer abutting opposite sides of active regionHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 25, 2006·3 cites·2 claims
- 3962US8284525B2Current perpendicular to plane magnetoresistance read head design using a current confinement structure proximal to an air bearing surfaceGILL HARDAYAL S·Filed 2011·Granted Oct 9, 2012·1 cites·17 claims
- 4062US7765676B2Method for patterning a magnetoresistive sensorHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Aug 3, 2010·4 cites·13 claims
- 4162US2008158736A1Read head having shaped read sensor-biasing layer junctions using partial millingHITACHI GLOBAL STORAGE TECH·Filed 2008·Application pending·0 cites
- 4261US7075094B2System, method, and apparatus for ion beam etching process stability using a reference for time scaling subsequent stepsHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jul 11, 2006·7 cites·13 claims
- 4360US8136226B2Read sensors and methods of making same with back-edge milling and refillingGILL HARDAYAL S·Filed 2008·Granted Mar 20, 2012·2 cites·14 claims
- 4460US7103963B2Method for manufacturing a tunnel junction sensor with non-shunting stabilizationHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Sep 12, 2006·2 cites·5 claims
- 4560US6919280B2Method of removing magnetoresistive sensor cap by reactive ion etchingHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Jul 19, 2005·3 cites·7 claims
- 4653US8098463B2Current perpendicular to plane magnetoresistance read head design using a current confinement structure proximal to an air bearing surfaceGILL HARDAYAL S·Filed 2008·Granted Jan 17, 2012·0 cites·20 claims
- 4753US2006158790A1Magnetoresistive sensor having a novel junction structure for improved track width definition and pinned layer stabilityHITACHI GLOBAL STORAGE TECH·Filed 2005·Application pending·0 cites
- 4852US7974047B2Current perpendicular to plane differential magnetoresistance read head design using a current confinement structure proximal to an air bearing surfaceHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Jul 5, 2011·0 cites·24 claims
- 4952US7565733B2Process for the fabrication of multilayer thin film magnetoresistive sensorsHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jul 28, 2009·0 cites·22 claims
- 5051US7497008B2Method of fabricating a thin film magnetic sensor on a waferHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Mar 3, 2009·0 cites·10 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →