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Title:
MANUFACTURE OF HIGH DENSITY INFORMATION RECORD CARRIER
Document Type and Number:
Japanese Patent JPS5862021
Kind Code:
A
Abstract:

PURPOSE: To obtain the titled carrier with the strain being prevented, by placing on a substrate an ultraviolet-curing resin having a specified viscosity value in the shape of a semisphere, bringing a stamper into contact with the resin under pressure to mold it under pressure, and irradiating it with ultraviolet rays to harden the resin.

CONSTITUTION: The disc substrate 4 of an ultraviolet-permeable material (e.g. polyvinyl chloride) is placed on a bottom force 5 of an ultraviolet-permeable meterial, and the ultraviolet-curing type resin 3 having a viscosity of 100W700c. P. is dropped by a dispenser 7 on the center of the surface of the base material. Thereafter, the tip of the dispenser 7 is withdrawn quickly outside of the pressing section, and the stamper 2 of the top force 1 is lowered. The stamper 2 comes in contact with the semisphere-shaped resin 3 at a point, and a pressure of 5W50kg/cm2 is applied to press and mold it in an annular shape. The resin 3 is finally brought to 1/20 times, preferably, 1/60 times or less as thick as the substrate 4. Ultraviolet rays are irradiated from an ultraviolet light source 6 to cure the resin and to mold signals.


Inventors:
FUJITA TOSHIJI
SAITOU AKIHIDE
Application Number:
JP16077581A
Publication Date:
April 13, 1983
Filing Date:
October 08, 1981
Export Citation:
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Assignee:
TOPPAN PRINTING CO LTD
International Classes:
B29C43/00; B29C31/04; B29C39/00; B29C39/10; B29C43/02; B29C43/34; B29C61/00; B29D17/00; G11B3/70; G11B7/26; G11B9/06; B29C35/08; (IPC1-7): G11B3/70; G11B7/26; G11B11/00
Domestic Patent References:
JPS53116105A1978-10-11



 
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