Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-12-20
2005-12-20
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S077030, C360S078110
Reexamination Certificate
active
06977791
ABSTRACT:
A system and methods for efficiently performing media writing functions is disclosed. The system and methods include: detecting media movement with respect to a base and heads during reading and writing, and moving the heads in response; using an interferometer, such as a dual beam differential interferometer, to dynamically monitor disk position and address perceived errors; and minimizing repeatable and non repeatable runout error by writing data, such as servo bursts, in multiple revolutions to average adverse runout conditions. The present system has the ability to use an interferometer to enhance media certification and perform on line, in situ monitoring of the media, and includes shrouding, head mounting, disk biasing, and related mechanical aspects beneficial to media writing.
REFERENCES:
patent: 5333140 (1994-07-01), Moraru et al.
patent: 5909333 (1999-06-01), Best et al.
Bellis Matt
Carr Tom
Hess Harald
Kilmer Dan L.
Lee Patrick Rodney
Hudspeth David
KLA-Tencor Technologies Corporation
Slavitt Mitchell
Smyrski Law Group, A P.C.
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