Dynamic information storage or retrieval – Storage medium structure – Special groove
Reexamination Certificate
2006-12-26
2006-12-26
Watko, Julie Anne (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Special groove
Reexamination Certificate
active
07154843
ABSTRACT:
A stamper and optical disk. A photoresist is applied to a substrate and this photoresist is exposed, developed and then transferred to form a disk master which has a recess/protrusion pattern formed on its one side. The one side of the disk master is etched to narrow the width of a protruding part constituting the recess/protrusion pattern, and the recess/protrusion pattern of the disk master with the reduced width of the protruding part is transferred to form a stamper. The recess/protrusion pattern provided on the stamper is transferred to form a predetermined pattern on a substrate of an optical disk.
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Akiyama Yuji
Masuhara Shin
Nakano Jun
Sonnenschein Nath & Rosenthal LLP
Sony Corporation
Watko Julie Anne
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