Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FORMED MEDIUM FOR TRANSFER AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPH04205936
Kind Code:
A
Abstract:

PURPOSE: To reduce defects and to obtain a high-quality optical disk substrate by forming the rugged information pattern of a formed medium for transfer by etching.

CONSTITUTION: A photoresist 3 is formed on a mirror-finished stamper with no information pattern, an information pattern 6 is formed in the photoresist 3 and etching is carried out to obtain a formed medium for transfer. Since the information pattern 6 is formed in the surface of the stamper by etching with the photoresist 3 as a mask, stress is not produced in the stamper and a high-quality patterned stamper free from a deposit causing defects is stably obtd. A high-quality optical disk substrate with a formed satisfactory information pattern can be obtd.


Inventors:
KATO KEIZO
HORIGOME SHINKICHI
SUZUKI MAKOTO
ITO SHO
Application Number:
JP33707590A
Publication Date:
July 28, 1992
Filing Date:
November 30, 1990
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
B29D17/00; G11B7/26; (IPC1-7): G11B7/26