The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2020
Filed:
Dec. 16, 2019
Applicant:
Marvell World Trade Ltd., St. Michael, BB;
Inventor:
Supaket Katchmart, San Jose, CA (US);
Assignee:
MARVELL ASIA PTE, LTD., Singapore, SG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/596 (2006.01); G11B 20/10 (2006.01); G11B 20/12 (2006.01); G11B 5/00 (2006.01);
U.S. Cl.
CPC ...
G11B 5/59666 (2013.01); G11B 5/59661 (2013.01); G11B 20/1024 (2013.01); G11B 20/1251 (2013.01); G11B 2005/0021 (2013.01); G11B 2020/1284 (2013.01);
Abstract
Zone self-servo write (SSW) technology is disclosed that leverages two clock signals synchronized in parallel to transition between zones to write servo patterns at different frequencies while minimizing error rate despite the different frequencies. Two separate clock signals ('clocks') are used to locate and lock to different reference spirals. By updating both clocks in parallel instead of in series, error rate for writing while stepping up frequency across zones is reduced.