Method of manufacturing disc-shaped recording medium

Details Method of manufacturing disc-shaped recording medium Method of manufacturing disc-shaped recording medium

2007-01-23

2007-01-23

Chen, Bret (Department: 1762)

Coating processes

Direct application of electrical, magnetic, wave, or...

Pretreatment of substrate or post-treatment of coated substrate

C427S240000, C427S289000, C118S035000

Reexamination Certificate

active

10929637

ABSTRACT:
Disclosed is a disc-shaped recording medium manufacturing method capable of making it difficult to leave the cutting wastage produced upon forming a notch for exfoliating a stamper on a disc-shaped substrate in the case of adopting a stamper-based transfer method, and surely forming the notch to improve a manufacturing yield. This disc-shaped recording medium manufacturing method is that a spacer layer having recording faces on both surfaces thereof is formed between the disc-shaped substrate and the stamper, a notch is formed in the vicinity of an outer peripheral edge of the stamper by a rotary blade of a circle cutter, and the stamper is exfoliated through the notch while the spacer layer stays on the disc-shaped substrate.

REFERENCES:
patent: 2002-197731 (2002-07-01), None
Patent Abstracts of Japan, vol. 2002, No. 11, Nov. 6, 2002, JP 2002-197731.

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