Inventor · disambiguated record
Alfredo Sam Chu
Also filed as: CHU ALFREDO · CHU ALFREDO S · CHU ALFREDO SAM
30 granted patents·218 citations·filing 2014–2018
96Inventor score
Technology areasG11B
Files withSEAGATE TECHNOLOGY LLC30
Top patents by PatentIndex Score
30 records- 0196US9595288B1Laser mode hopping detection in a heat-assisted magnetic recording driveSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Mar 14, 2017·33 cites·20 claims
- 0296US9236081B1Laser temperature calibration in a HAMR deviceSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Jan 12, 2016·31 cites·20 claims
- 0395US9508369B2Defining a maximum sequential write duration for a data storage device utilizing heat-assisted recordingSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Nov 29, 2016·20 cites·20 claims
- 0492US9502061B1Data storage device optimization based on adjacent track interferenceSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Nov 22, 2016·22 cites·20 claims
- 0590US9653121B1Heat-assisted magnetic recording device capable of detecting head malfunction based on different currents of sensorsSEAGATE TECHNOLOGY LLC·Filed 2016·Granted May 16, 2017·10 cites·20 claims
- 0690US9311951B1Laser adjustment during field operation of a heat-assisted magnetic recording data storage deviceSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Apr 12, 2016·10 cites·20 claims
- 0787US9093091B1Determination of reader to writer crosstrack offset via a magnetic diskSEAGATE TECHNOLOGY LLC·Filed 2014·Granted Jul 28, 2015·9 cites·17 claims
- 0885US9704519B1Sorting of HAMR read/write heads based on reader and writer widthsSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Jul 11, 2017·7 cites·20 claims
- 0985US9589587B1Laser adjustment during field operation of a heat-assisted magnetic recording data storage deviceSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Mar 7, 2017·6 cites·20 claims
- 1084US9892752B1Selecting a maximum laser power for a calibration based on a previously measured functionSEAGATE TECHNOLOGY LLC·Filed 2017·Granted Feb 13, 2018·7 cites·20 claims
- 1184US9396750B2Near-field transducer efficiency monitoring systemSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Jul 19, 2016·6 cites·20 claims
- 1283US10657987B1Laser boost and duration optimizationSEAGATE TECHNOLOGY LLC·Filed 2018·Granted May 19, 2020·5 cites·20 claims
- 1383US9842619B1Selecting laser power based on writing to a set of consecutive user data wedgesSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Dec 12, 2017·6 cites·12 claims
- 1483US9548068B1Determining optical degradation in a heat-assisted read/write headSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Jan 17, 2017·6 cites·18 claims
- 1583US9142244B2Near-field transducer efficiency monitoring systemSEAGATE TECHNOLOGY LLC·Filed 2014·Granted Sep 22, 2015·5 cites·20 claims
- 1680US9478248B2Adaptive HAMR laser power data storage deviceSEAGATE TECHNOLOGY LLC·Filed 2014·Granted Oct 25, 2016·5 cites·19 claims
- 1780US9202506B1Current boost profile applied to laser during heat-assisted magnetic recordingSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Dec 1, 2015·5 cites·20 claims
- 1879US10127930B1In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equationSEAGATE TECHNOLOGY LLC·Filed 2018·Granted Nov 13, 2018·4 cites·20 claims
- 1978US9916850B1Laser bias current controlSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Mar 13, 2018·4 cites·19 claims
- 2078US9679597B1Bidirectional shingled magnetic recording in a heat-assisted magnetic recording deviceSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Jun 13, 2017·4 cites·20 claims
- 2176US9361920B1Compensation for track misalignment due to degradation of HAMR write headSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Jun 7, 2016·4 cites·20 claims
- 2274US10152997B1Laser current calibration using preamplifierSEAGATE TECHNOLOGY LLC·Filed 2017·Granted Dec 11, 2018·3 cites·20 claims
- 2374US9349415B1Qualifying a recording head based on symmetry of a cross-track profileSEAGATE TECHNOLOGY LLC·Filed 2015·Granted May 24, 2016·3 cites·20 claims
- 2468US10147453B1Laser boost and duration optimizationSEAGATE TECHNOLOGY LLC·Filed 2015·Granted Dec 4, 2018·2 cites·7 claims
- 2563US10395673B1In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equationSEAGATE TECHNOLOGY LLC·Filed 2018·Granted Aug 27, 2019·1 cites·20 claims
- 2652US10008231B2Shingled magnetic recording for writing tracks of variable track widthSEAGATE TECHNOLOGY LLC·Filed 2017·Granted Jun 26, 2018·0 cites·20 claims
- 2745US9997176B1Activating a magnetic writer to recover from read errors due to reader instabilitySEAGATE TECHNOLOGY LLC·Filed 2017·Granted Jun 12, 2018·0 cites·20 claims
- 2843US10083716B1Laser calibration for heat-assisted magnetic recording head using interleaved laser currentSEAGATE TECHNOLOGY LLC·Filed 2017·Granted Sep 25, 2018·0 cites·20 claims
- 2943US9978403B1Changing write coil current in response to reader instabilitySEAGATE TECHNOLOGY LLC·Filed 2017·Granted May 22, 2018·0 cites·19 claims
- 3043US9734862B1Method and apparatus for writing test tracks on a magnetic recording mediumSEAGATE TECHNOLOGY LLC·Filed 2016·Granted Aug 15, 2017·0 cites·20 claims
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