Kwong Chan Phones & Addresses
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San Jose, CA
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Milpitas, CA
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Garland, TX
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Fremont, CA
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San Diego, CA
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Carlsbad, CA
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Los Angeles, CA
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Pasadena, CA
Business Records
Name / Title
Company / Classification
Phones & Addresses
Director
Bayer Pots
Whol Medical/Hospital Equipment
Whol Medical/Hospital Equipment
5650 Hollis St, Oakland, CA 94608
(510) 923-0981
(510) 923-0981
President
SUNFAIR CORPORATION
642 Giguere Ct, San Jose, CA 95133
Managing
Bean Sprout Express, LLC
Investment & Other Business
Investment & Other Business
2375 Sueno Way, Fremont, CA 94539
Publications
Us Patents
Use Of Offline Servo Track Writer Together With Single Pass Servo Writing Process
View pageUS Patent:
7190545, Mar 13, 2007
Filed:
Feb 5, 2004
Appl. No.:
10/773917
Inventors:
Kwong Tat Chan - Pleasanton CA, US
Nikolay Ivanov - San Jose CA, US
Nikolay Ivanov - San Jose CA, US
Assignee:
Samsung Electronics Co., Ltd. - Suwon
International Classification:
G11B 21/02
US Classification:
360 75
Abstract:
A method for writing servo information onto a disk of a hard disk drive. The method includes writing a reference servo pattern onto a track of a disk with an off-line servo track writer. The reference servo pattern has less servo bits than the final pattern allowing the off-line writer to write in a single pass. The disk is then assembled into a hard disk drive assembly and a final servo pattern is written onto the track. The final pattern can also be written with two passes. The single pass writing process reduces the time required to write the servo information. Additionally, the off-line servo track writer can write servo on a plurality of disk at the same time, further reducing the process time for writing servo and mass producing hard disk drives.
Method To Identify Short Spirals
View pageUS Patent:
7688542, Mar 30, 2010
Filed:
Jul 2, 2008
Appl. No.:
12/217443
Inventors:
Kwong T. Chan - Pleasanton CA, US
Linh N. Nguyen - San Jose CA, US
Stanley H. Shepherd - Morgan Hill CA, US
Linh N. Nguyen - San Jose CA, US
Stanley H. Shepherd - Morgan Hill CA, US
Assignee:
Samsung Electronics Co., Ltd. - Suwon
International Classification:
G11B 5/596
US Classification:
360 7705
Abstract:
A method for writing servo onto a disk of a hard disk drive with a servo writer. The method includes writing a plurality of spiral servo signals onto a disk. The spiral servo signals include a plurality of short spirals separated by unequal distances. The short spirals are detected by determining the unequal distances and used to write a plurality of servo patterns. The unequal distances provide information of the short spirals at different quadrants of the disk. The distances between a bank of odd short spirals is different than a bank of even short spirals which allows the servo writer to determine whether the bank is odd or even without switching banks. Either the even or odd bank of short spirals can be used to locate a starting reference point from which the servo writer can count spirals and write A, B, C and D servo bursts.