Stock material or miscellaneous articles – Circular sheet or circular blank
Patent
1998-03-10
2000-06-06
Evans, Elizabeth
Stock material or miscellaneous articles
Circular sheet or circular blank
428 642, 428 644, 428688, 428702, 428913, 43027011, 430321, 4304951, 430945, 3692754, 369283, B32B 300
Patent
active
060715863
ABSTRACT:
A master disk used in the manufacturing of optical disks and having a substrate and a photoresist layer coated on the substrate. The method for manufacturing the master disk includes the steps of: coating a first photoresist layer on a substrate; exposing the first photoresist layer according to patterns of a groove formation recess and a land formation protrusion corresponding to a groove and a land, respectively; etching the exposed substrate and the first photoresist layer, to thereby form the groove formation recess and the land formation protrusion on the substrate; coating a second photoresist layer on the substrate, to thereby form the groove and the land at positions corresponding to the groove formation recess and the pit formation protrusion, respectively; exposing the second photoresist layer according to a pattern of a pit where predetermined information is recorded; and etching the second photoresist layer, to thereby form the pit on the groove and the land.
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Jung Seung-tae
Ro Myong-do
Yoon Du-seop
Evans Elizabeth
Samsung Electronics Co,. Ltd.
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