Inventor · disambiguated record
Chen-Jung Chien
Also filed as: CHIEN CHEN-JUNG
52 granted patents·7 pending applications·554 citations·filing 2000–2025
98Inventor score
Files withWESTERN DIGITAL TECH INC25HEADWAY TECHNOLOGIES INC19WESTERN DIGITAL FREMONT LLC7MAGIC TECHNOLOGIES INC3FU SHENG IND CO LTD1
Top patents by PatentIndex Score
59 records- 0199US11087785B1Effective rear hard bias for dual free layer read headsWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 10, 2021·15 cites·18 claims
- 0298US9147404B1Method and system for providing a read transducer having a dual free layerWESTERN DIGITAL FREMONT LLC·Filed 2015·Granted Sep 29, 2015·18 cites·17 claims
- 0398US8711528B1Tunnel magnetoresistance read head with narrow shield-to-shield spacingXIAO RONGFU·Filed 2012·Granted Apr 29, 2014·174 cites·7 claims
- 0496US11170809B1Transverse bias strength enhancement in dual free layer tunnel magnetoresistive read headsWESTERN DIGITAL TECH INC·Filed 2020·Granted Nov 9, 2021·7 cites·20 claims
- 0595US7979978B2Method for manufacturing a self-aligned full side shield PMRHEADWAY TECHNOLOGIES INC·Filed 2007·Granted Jul 19, 2011·23 cites·12 claims
- 0694US11514933B1Method to enhance magnetic strength and robustness of rear hard bias for dual free layer readWESTERN DIGITAL TECH INC·Filed 2021·Granted Nov 29, 2022·4 cites·13 claims
- 0793US10354681B1Tunnel magnetoresistance read head including side shields containing nanocrystalline ferromagnetic particlesSANDISK TECHNOLOGIES LLC·Filed 2018·Granted Jul 16, 2019·17 cites·21 claims
- 0893US7773341B2Laminated film for head applicationsHEADWAY TECHNOLOGIES INC·Filed 2007·Granted Aug 10, 2010·15 cites·21 claims
- 0992US11514934B1Planar design for sensors in a dual free layer read headWESTERN DIGITAL TECH INC·Filed 2021·Granted Nov 29, 2022·4 cites·22 claims
- 1092US7583481B2FCC-like trilayer AP2 structure for CPP GMR EM improvementHEADWAY TECHNOLOGIES INC·Filed 2005·Granted Sep 1, 2009·22 cites·20 claims
- 1191US9214172B2Method of manufacturing a magnetic read headWESTERN DIGITAL FREMONT LLC·Filed 2014·Granted Dec 15, 2015·11 cites·12 claims
- 1291US9065043B1Tunnel magnetoresistance read head with narrow shield-to-shield spacingWESTERN DIGITAL FREMONT LLC·Filed 2014·Granted Jun 23, 2015·10 cites·6 claims
- 1391US7446987B2Composite hard bias design with a soft magnetic underlayer for sensor applicationsHEADWAY TECHNOLOGIES INC·Filed 2004·Granted Nov 4, 2008·31 cites·28 claims
- 1489US6785954B2Method for fabricating lead overlay (LOL) on the bottom spin valve GMR read sensorHEADWAY TECHNOLOGIES INC·Filed 2002·Granted Sep 7, 2004·23 cites·25 claims
- 1589US6632474B1Robust hard bias/conductor lead structures for future GMR headsHEADWAY TECHNOLOGIES INC·Filed 2000·Granted Oct 14, 2003·23 cites·9 claims
- 1688US7016165B2Abutted junction GMR read head with an improved hard bias layer and a method for its fabricationHEADWAY TECHNOLOGIES INC·Filed 2001·Granted Mar 21, 2006·24 cites·14 claims
- 1787US12106787B1DFL read head with SiOx cap layer on AlOx refill layersWESTERN DIGITAL TECH INC·Filed 2023·Granted Oct 1, 2024·2 cites·19 claims
- 1887US6668443B2Process for manufacturing a spin valve recording headHEADWAY TECHNOLOGIES INC·Filed 2001·Granted Dec 30, 2003·19 cites·10 claims
- 1984US9412400B2Tunnel magnetoresistance read head with narrow shield-to-shield spacingWESTERN DIGITAL (FREMONT) LLC·Filed 2015·Granted Aug 9, 2016·5 cites·6 claims
- 2084US7515388B2Composite hard bias design with a soft magnetic underlayer for sensor applicationsHEADWAY TECHNOLOGIES INC·Filed 2004·Granted Apr 7, 2009·17 cites·18 claims
- 2184US7358100B2Bottom conductor for integrated MRAMMAGIC TECHNOLOGIES INC·Filed 2007·Granted Apr 15, 2008·8 cites·9 claims
- 2284US2025266056A1Middle Shields Two-Dimensional Magnetic Recording Read HeadsWESTERN DIGITAL TECH INC·Filed 2025·Application pending·0 cites
- 2383US12322420B2Middle shields two-dimensional magnetic recording read headsWESTERN DIGITAL TECH INC·Filed 2023·Granted Jun 3, 2025·0 cites·13 claims
- 2483US10068601B1Free layer only magnetic reader that may have a reduced shield-to-shield spacing and a multilayer side biasWESTERN DIGITAL FREMONT LLC·Filed 2016·Granted Sep 4, 2018·6 cites·19 claims
- 2582US11170806B2Magnetic sensor array with single TMR film plus laser annealing and characterizationWESTERN DIGITAL TECH INC·Filed 2020·Granted Nov 9, 2021·1 cites·18 claims
- 2680US11410690B2Two-dimensional magnetic recording reader with dual free layer magnetic tunnel junctionWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 9, 2022·2 cites·20 claims
- 2780US9053719B2Magnetoresistive sensor for a magnetic storage system read head, and fabrication method thereofWESTERN DIGITAL FREMONT LLC·Filed 2012·Granted Jun 9, 2015·3 cites·12 claims
- 2880US7688555B2Hard bias design for extra high density recordingHEADWAY TECHNOLOGIES INC·Filed 2004·Granted Mar 30, 2010·11 cites·35 claims
- 2980US6842969B2Process for manufacturing a magnetic read headHEADWAY TECHNOLOGIES INC·Filed 2002·Granted Jan 18, 2005·12 cites·6 claims
- 3077US7265404B2Bottom conductor for integrated MRAMMAGIC TECHNOLOGIES INC·Filed 2005·Granted Sep 4, 2007·7 cites·8 claims
- 3176US8107201B2Hard bias design for extra high density recordingZHANG KUNLIANG·Filed 2010·Granted Jan 31, 2012·3 cites·8 claims
- 3275US8012316B2FCC-like trilayer AP2 structure for CPP GMR EM improvementHEADWAY TECHNOLOGIES INC·Filed 2009·Granted Sep 6, 2011·4 cites·9 claims
- 3375US7336452B2Patterned exchange bias GMR using metallic buffer layerHEADWAY TECHNOLOGIES INC·Filed 2005·Granted Feb 26, 2008·2 cites·8 claims
- 3475US7050273B2Bottom spin valve sensor having a lead overlay (LOL) structure fabricated thereonHEADWAY TECHNOLOGIES INC·Filed 2004·Granted May 23, 2006·8 cites·18 claims
- 3574US8054583B2Ta/W film as heating device for dynamic fly height adjustmentHEADWAY TECHNOLOGIES INC·Filed 2008·Granted Nov 8, 2011·2 cites·20 claims
- 3673US11495252B2Magnetic sensor array with single TMR film plus laser annealing and characterizationWESTERN DIGITAL TECH INC·Filed 2021·Granted Nov 8, 2022·0 cites·20 claims
- 3772US8472138B2Self-aligned full side shield PMR and method to make itHAN CHERNG-CHYI·Filed 2011·Granted Jun 25, 2013·2 cites·8 claims
- 3870US2025014594A1Dual Free Layer TMR Reader With Shaped Rear Bias and Methods of Forming ThereofWESTERN DIGITAL TECH INC·Filed 2024·Application pending·0 cites
- 3967US10629230B2Method of forming a magnetic headWESTERN DIGITAL TECH INC·Filed 2017·Granted Apr 21, 2020·2 cites·20 claims
- 4066US11169228B2Magnetic sensor with serial resistor for asymmetric sensing field rangeWESTERN DIGITAL TECH INC·Filed 2019·Granted Nov 9, 2021·0 cites·20 claims
- 4164US11415645B2Magnetic sensor array with one TMR stack having two free layersWESTERN DIGITAL TECH INC·Filed 2019·Granted Aug 16, 2022·0 cites·17 claims
- 4264US11169227B2Dual free layer TMR magnetic field sensorWESTERN DIGITAL TECH INC·Filed 2019·Granted Nov 9, 2021·0 cites·20 claims
- 4362US11201280B2Bottom leads chemical mechanical planarization for TMR magnetic sensorsWESTERN DIGITAL TECH INC·Filed 2019·Granted Dec 14, 2021·0 cites·22 claims
- 4462US9830936B2Magnetic read head with antiferromagentic layerWESTERN DIGITAL (FREMONT) LLC·Filed 2015·Granted Nov 28, 2017·1 cites·4 claims
- 4562US6428714B1Protective layer for continuous GMR designHEADWAY TECHNOLOGIES INC·Filed 2000·Granted Aug 6, 2002·7 cites·20 claims
- 4661US6879474B2Junction stability and yield for spin valve headsHEADWAY TECHNOLOGIES INC·Filed 2003·Granted Apr 12, 2005·3 cites·9 claims
- 4761US2024071413A1Dual Free Layer TMR Reader With Shaped Rear Bias and Methods of Forming ThereofWESTERN DIGITAL TECH INC·Filed 2022·Application pending·0 cites
- 4859US12308052B2Produce thinner DTS and adjustable capacitance for TDMR headsWESTERN DIGITAL TECH INC·Filed 2023·Granted May 20, 2025·0 cites·20 claims
- 4959US11598828B2Magnetic sensor array with different RA TMR filmWESTERN DIGITAL TECH INC·Filed 2019·Granted Mar 7, 2023·0 cites·23 claims
- 5058US12374356B1Pinned shield with controllable exchange bias fieldWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 29, 2025·0 cites·20 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
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