Inventor · disambiguated record
Ellis Cha
Also filed as: CHA ELLIS · CHA ELLIS T · CHA ELLIS TAEHO
71 granted patents·11 pending applications·719 citations·filing 1994–2024
99Inventor score
Top patents by PatentIndex Score
82 records- 0198US7391594B2Apparatus for providing an additional ground pad and electrical connection for grounding a magnetic recording headSAE MAGNETICS HK LTD·Filed 2006·Granted Jun 24, 2008·46 cites·4 claims
- 0294US7782569B2Magnetic recording head and media comprising aluminum oxynitride underlayer and a diamond-like carbon overcoatSAE MAGNETICS HK LTD·Filed 2007·Granted Aug 24, 2010·18 cites·13 claims
- 0394US7440219B2Non-contact measurement of slider fly height by electrostatic forceSAE MAGNETICS HK LTD·Filed 2006·Granted Oct 21, 2008·17 cites·12 claims
- 0494US7064928B2Method and apparatus for providing an additional ground pad and electrical connection for grounding a magnetic recording headSAE MAGNETICS HK LTD·Filed 2003·Granted Jun 20, 2006·62 cites·20 claims
- 0594US7046473B2Method and apparatus for active fly height control with heating and electrical chargeSAE MAGNETICS HK LTD·Filed 2004·Granted May 16, 2006·44 cites·18 claims
- 0693US7679857B2Non-contact measurement of slider fly height by electrostatic forceSAE MAGNETICS HK LTD·Filed 2008·Granted Mar 16, 2010·14 cites·6 claims
- 0791US7357875B2Hybrid coating for magnetic headsSAE MAGNETICS HK LTD·Filed 2006·Granted Apr 15, 2008·9 cites·8 claims
- 0890US8976481B1Touch down detection with HDI sensor DC modeSAE MAGNETICS HK LTD·Filed 2014·Granted Mar 10, 2015·16 cites·17 claims
- 0990US8014104B2Magnetic head/disk with transition metal oxynitride adhesion/corrosion barrier and diamond-like carbon overcoat bilayerSAE MAGNETICS HK LTD·Filed 2007·Granted Sep 6, 2011·12 cites·8 claims
- 1089US7760468B2Air-bearing design with particle rejection featuresSAE MAGNETICS HK LTD·Filed 2005·Granted Jul 20, 2010·13 cites·16 claims
- 1188US8184405B1Air-bearing slider design for sub-nanometer clearance in hard disk drive (HDD)ZHENG GUOQIANG·Filed 2011·Granted May 22, 2012·21 cites·21 claims
- 1288US7969685B2ABS design for dynamic flying height (DFH) applicationsSAE MAGNETICS HK LTD·Filed 2008·Granted Jun 28, 2011·9 cites·12 claims
- 1388US7961433B2Air-bearing design for hard disk drive (HDD) applicationsSAE MAGNETICS HK LTD·Filed 2008·Granted Jun 14, 2011·17 cites·9 claims
- 1488US7907368B2Balanced head gimbal assembly for improved seeking performanceSAE MAGNETICS HK LTD·Filed 2007·Granted Mar 15, 2011·7 cites·23 claims
- 1587US9892746B1ABS design with soft bumper pads (SBP) for mitigating media damage and thermal erasure in hard disk drives (HDD)SAE MAGNETICS HK LTD·Filed 2017·Granted Feb 13, 2018·5 cites·21 claims
- 1687US7684154B2Suspension gimbal designs with better dynamic performancesSAE MAGNETICS HK LTD·Filed 2006·Granted Mar 23, 2010·6 cites·5 claims
- 1787US7617737B2Adjustment of pitch and roll static torques in a disk drive head gimbal assemblySAE MAGNETICS HK LTD·Filed 2006·Granted Nov 17, 2009·7 cites·33 claims
- 1887US7342750B2Method for providing electrical crossover in a laminated structureSAE MAGNETICS HK LTD·Filed 2004·Granted Mar 11, 2008·45 cites·22 claims
- 1987US5497085AMethod for determining an outer diameter rolloff in a process for making magnetic disksCONNER PERIPHERALS INC·Filed 1994·Granted Mar 5, 1996·43 cites·16 claims
- 2086US10360935B1Dual write heater for slider surface topography control in double perpendicular magnetic recording (PMR) writersHEADWAY TECH INC·Filed 2018·Granted Jul 23, 2019·10 cites·30 claims
- 2186US8054585B2Gimbal with assymmetric dynamic stiffnessSAE MAGNETICS HK LTD·Filed 2006·Granted Nov 8, 2011·6 cites·27 claims
- 2286US7701672B2Suspension with locally stiffened load beamSAE MAGNETICS HK LTD·Filed 2006·Granted Apr 20, 2010·7 cites·33 claims
- 2384US7468196B2Measuring and neutralizing the electrical charge at the interface of a magnetic head and mediaSAE MAGNETICS HK LTD·Filed 2006·Granted Dec 23, 2008·4 cites·11 claims
- 2483US11232812B1Air-bearing surface (ABS) design with side flow blocker for mitigating lube and hydrocarbon accumulation in hard disk drives (HDD)SAE MAGNETICS HK LTD·Filed 2021·Granted Jan 25, 2022·2 cites·19 claims
- 2583US8027127B2Method of reducing slider roll torque by balancing head gimbal assembly for improved seeking performanceSAE MAGNETICS HK LTD·Filed 2011·Granted Sep 27, 2011·5 cites·24 claims
- 2683US7327535B2Hybrid coating for magnetic headsSAE MAGNETICS HK LTD·Filed 2003·Granted Feb 5, 2008·12 cites·19 claims
- 2782US11211084B1Protective shields under touchdown conditions for thermally assisted perpendicular magnetic recordingSAE MAGNETICS HK LTD·Filed 2020·Granted Dec 28, 2021·2 cites·20 claims
- 2882US8717702B2Measurement of spacing fluctuationZENG QINGHUA·Filed 2012·Granted May 6, 2014·7 cites·22 claims
- 2982US8576671B1ABS design with multiple heatersSAE MAGNETICS HK LTD·Filed 2012·Granted Nov 5, 2013·8 cites·20 claims
- 3081US8767339B2Spacing fluctuation compensationZENG QINGHUA·Filed 2012·Granted Jul 1, 2014·6 cites·11 claims
- 3181US8018682B2Magnetic disk comprising an aluminum alloy oxynitride underlayer and a diamond-like carbon overcoatSAE MAGNETICS HK LTD·Filed 2010·Granted Sep 13, 2011·4 cites·13 claims
- 3281US8009387B2Forming an aluminum alloy oxynitride underlayer and a diamond-like carbon overcoat to protect a magnetic recording head and/or mediaSAE MAGNETICS HK LTD·Filed 2010·Granted Aug 30, 2011·4 cites·38 claims
- 3381US7042670B2Method for adjusting flying height of magnetic heads using an electrical charge through an electrical pad on the sliderSAE MAGNETICS HK LTD·Filed 2003·Granted May 9, 2006·14 cites·26 claims
- 3480US7460342B2Method to form tapered magnetic shield for perpendicular recording headHEADWAY TECHNOLOGIES INC·Filed 2005·Granted Dec 2, 2008·4 cites·29 claims
- 3578US9940960B2Air-bearing design for hydrocarbon and lube pick-up improvements in hard disk drive (HDD)SAE MAGNETICS HK LTD·Filed 2016·Granted Apr 10, 2018·7 cites·13 claims
- 3678US7957104B2Suspension with bi-layer flexure base whose layers have different coefficients of thermal expansion to eliminate thermally induced flying height variationsSAE MAGNETICS HK LTD·Filed 2007·Granted Jun 7, 2011·3 cites·5 claims
- 3777US10679653B1High power ratio mode for TAMR drivesSAE MAGNETICS HK LTD·Filed 2019·Granted Jun 9, 2020·4 cites·17 claims
- 3877US8218269B2Gimbal mounted slider assembly with ramp limiter transverse barZENG QINGHUA·Filed 2011·Granted Jul 10, 2012·3 cites·6 claims
- 3975US10811046B2Air-bearing surface (ABS) design to reduce particle scratch riskSAE MAGNETICS HK LTD·Filed 2018·Granted Oct 20, 2020·3 cites·14 claims
- 4075US6034842ASubambient pressure slider for constant flying heightSAE MAGNETICS HK LTD·Filed 1996·Granted Mar 7, 2000·27 cites·18 claims
- 4174US11114121B2Air-bearing surface (ABS) design to reduce particle scratch riskSAE MAGNETICS HK LTD·Filed 2020·Granted Sep 7, 2021·1 cites·6 claims
- 4274US8139306B2Electrical current as probe for modulation at head-disk interfaceFENG ZHU·Filed 2004·Granted Mar 20, 2012·9 cites·21 claims
- 4374US7885040B2Suspension with locally strengthened gimbalSAE MAGNETICS HK LTD·Filed 2007·Granted Feb 8, 2011·2 cites·24 claims
- 4474US6943989B2Subambient pressure slider with partitioned subambient areaSAE MAGNETICS HK LTD·Filed 2002·Granted Sep 13, 2005·10 cites·30 claims
- 4573US7433156B2Flexure for minimizing fly height modulation of near-contact recording sliders in a disk driveSAE MAGNETICS HK LTD·Filed 2006·Granted Oct 7, 2008·3 cites·35 claims
- 4673US5985163APartially etched protective overcoat for a disk drive sliderSEAGATE TECHNOLOGY·Filed 1997·Granted Nov 16, 1999·23 cites·8 claims
- 4772US7085083B2Method for testing a micro-actuator in a magnetic testerSAE MAGNETICS HK LTD·Filed 2003·Granted Aug 1, 2006·8 cites·22 claims
- 4870US8867172B2ABS design for uniform touch-down and back-off in DFH applicationsZHENG GUOQIANG·Filed 2012·Granted Oct 21, 2014·5 cites·11 claims
- 4970US7506552B2Micro torque and micro stiffness measurement deviceSAE MAGNETICS HK LTD·Filed 2007·Granted Mar 24, 2009·8 cites·23 claims
- 5069US10629233B1Bumper pad design for TAMR drivesSAE MAGNETICS HK LTD·Filed 2019·Granted Apr 21, 2020·2 cites·12 claims
Showing the top 50 of 82 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →