Inventor

Chun Sei Tsai

Inventor

Tustin, CA, US

Overview

2007–2020

Patent span

Physics

Primary field (CPC G)

Patents· 36 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer76%

G06FElectric digital data processing17%

G11CStatic stores5%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters2%

PatentTitleYear

10,878,844Data storage device controlling head fly height based on temperature2020 10,783,911Data storage device bank writing servo sectors for interleaved servo control processing2020 9,437,242'Data storage device employing different frequency preambles in adjacent data tracks'2016 9,418,699'Management of sequentially written data'2016 9,298,380'Data storage device with selective write to a first storage media or a second storage media'2016 9,269,393'Electronic system with data refresh mechanism and method of operation thereof'2016 9,251,823'Data storage device delaying seek operation to avoid thermal asperities'2016 9,202,517'Disk drive calibrating defect threshold based on statistical quality metric measured for reference tracks'2015 9,117,489'Data storage device screening heads by verifying defects after defect scan'2015 9,075,714'Electronic system with data management mechanism and method of operation thereof'2015 9,053,747'Disk drive calibrating failure threshold based on noise power effect on failure detection metric'2015 9,036,283'Data storage device with selective write to a first storage media or a second storage media'2015 8,902,533'Disk drive detecting different asperities on a disk using different sensor bias settings'2014 8,797,667'Disk drive calibrating bias signal for touchdown sensor'2014 8,793,532'Hard-disk drive work load profiling and capturing systems and methods'2014 8,780,478'Grease wear leveling for a disk drive'2014 8,751,699'Systems and methods for indication of activity status of a storage device'2014 8,694,841'Methods and devices for preventing potential media errors from growing thermal asperities'2014 8,612,798'Hybrid drive storing write data in non-volatile semiconductor memory if write verify of disk fails'2013 8,429,343'Hybrid drive employing non-volatile semiconductor memory to facilitate refreshing disk'2013 8,427,771'Hybrid drive storing copy of data in non-volatile semiconductor memory for suspect disk data sectors'2013 8,320,067'Refresh operations using write/read commands'2012 8,271,692'Throttled command completion time'2012 8,174,780'Disk drive biasing a refresh monitor with write parameter of a write operation'2012 8,149,528'Disk drive connecting defect shapes to preempt data loss'2012 8,116,025'Disk drive executing retry operation after adjusting jog value in response to gain control'2012 8,031,423'Disk drive generating actual data TPI profile by combining segments of predetermined data TPI profiles'2011 8,004,785'Disk drive write verifying unformatted data sectors'2011 7,982,993'Disk drive employing different servo TPI to data TPI ratios across the disk surface'2011 7,974,029'Disk drive biasing refresh zone counters based on write commands'2011 7,945,727'Disk drive refreshing zones in segments to sustain target throughput of host commands'2011 7,933,087'Disk drive storing parameters of a write operation in a plurality of data sectors'2011 7,929,234'Disk drive prioritizing in-the-field defect scanning based on number of write operations in each of a plurality of defect zones'2011 7,852,596'Disk drive returning dummy data to a host when reading an unwritten data sector'2010 7,212,374'Disk drive to characterize misaligned servo wedges'2007 7,209,310'Disk drive identifying starting track by performing multiple load operations'2007

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2007–2020Patents assigned to WESTERN DIGITAL TECH INC (36)· patent assignee history

2007–2020Based in Tustin, CA, US· patent location history

2012–2014Patents assigned to TSAI CHUN SEI (11)· patent assignee history

2012–2014Patents assigned to BARLOW CARL E (4)· patent assignee history

2012–2014Patents assigned to HUYNH SANG (3)· patent assignee history

2012–2014Patents assigned to BOYLE WILLIAM B (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
WESTERN DIGITAL TECH INC	36	2007–2020
TSAI CHUN SEIself	11	2012–2014
BARLOW CARL E	4	2012–2014
HUYNH SANG	3	2012–2014
BOYLE WILLIAM B	2	2012–2014

Locations

Location	Patents	Span
Tustin, California, US	36	2007–2020