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Patent Searching and Data


Title:
MANUFACTURE OF OPTICAL INFORMATION CARRIER DISC
Document Type and Number:
Japanese Patent JPS59111820
Kind Code:
A
Abstract:

PURPOSE: To obtain an optical information carrier disc having a high-quality track groove by a method in which a mask to regulate the amount of permeation of ultraviolet rays is provided to a pressure glass plate, the hardening condition of UV resin on the periphery of the disc base plate is controlled, and the manufacturing process is cleaned.

CONSTITUTION: A transparent disc base plate 3 is placed through an ultraviolet- ray curable resin layer 4 on the surface of a stamper 1. A transparent pressure plate 5 in which a mask 10 to regulate the amount of permeation of ultraviolet rays is provided in the corresponding part from near the periphery to the outside of the disc base plate 3 is placed on the disc base plate 3. The mask 10 is made of a sheet entirely impervious to ultraviolet rays. The ultraviolet rays- curable resin 4 is hardened by irradiation of ultraviolet rays to the disc base plate 3, and then the ultraviolet rays-hardened resin 4 with the disc base plate 3 is separated from the stamper 1 to obtain a desired optical information carrier disc.


Inventors:
UCHIDA MASAMI
OOTA TAKEO
Application Number:
JP22142182A
Publication Date:
June 28, 1984
Filing Date:
December 16, 1982
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G11B7/26; B29C35/08; B29C39/00; B29C39/10; B29C39/26; B29C43/02; B29C61/00; B29D17/00; G11B3/70; G11B9/06; B29C43/00; (IPC1-7): G11B3/70; G11B7/26; G11B11/00
Attorney, Agent or Firm:
Toshio Nakao