Stamper for producing optical recording medium, optical...

Details Stamper for producing optical recording medium, optical... Stamper for producing optical recording medium, optical...

2005-11-29

2005-11-29

Klimowicz, William J (Department: 2652)

Dynamic optical information storage or retrieval

Optical storage medium structure

C264S001330, C264S299000, C264S107000, C216S062000, C204S192340

Reexamination Certificate

active

06971116

ABSTRACT:
A stamper suppressed in surface roughness, uneven thickness, and deviation of circularity in inner circumference, a method of producing the same, an optical recording medium produced by molding using the stamper, and a method of producing the same, wherein a base member having a mirror polished main surface and comprising silicon or glass is formed with a resist film; the resist film is exposed and developed so as to form a resist film of a pattern corresponding to relief shapes; the mirror surface of the base member is processed to relief shapes (projecting regions and recessed regions) by dry etching etc. using the obtained resist film as a mask so as to obtain a stamper; the obtained stamper is used for injection molding to form a medium substrate; and an optical recording multilayer film and a protective layer are formed to thereby produce an optical recording medium.

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