Dynamic magnetic information storage or retrieval – Record medium – Disk
Reexamination Certificate
2011-06-28
2011-06-28
Deo, Duy-Vu N (Department: 1713)
Dynamic magnetic information storage or retrieval
Record medium
Disk
C360S077080
Reexamination Certificate
active
07969686
ABSTRACT:
Methods of defining servo patterns and data patterns for forming patterned magnetic media are described. For one method, a lithographic process is performed to define a servo pattern in servo regions on a substrate. The lithographic process also defines a first data pattern in data regions of the substrate. The first data pattern is then transferred to (i.e., etched into) the data regions. Self-assembly structures are then formed on the data pattern in the data regions to define a second data pattern. The servo pattern is then transferred to the servo regions and the second data pattern is transferred to the data regions. Thus, the servo pattern is defined through lithographic processes while the data pattern is defined by a combination of lithographic processes and self-assembly.
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Albrecht Thomas R.
Wu Xiao Z.
Yang Henry Hung
Deo Duy-Vu N
Duft Bornsen & Fishman LLP
Hitachi Global Storage Technologies - Netherlands B.V.
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