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Patent Searching and Data


Title:
PRODUCTION OF OPTICAL DISK
Document Type and Number:
Japanese Patent JPH01311437
Kind Code:
A
Abstract:

PURPOSE: To obtain high reliability by consisting the above process of a 1st stage of a peeling a disk for reproduction of an information recording surface and a substrate, a 2nd stage of forming a thin film layer for recording and a 3rd stage of providing a curing type resin layer.

CONSTITUTION: A photosetting type resin material 6 is injected between a stamper 4 and a flat plate 5 and is photoset by irradiation of ultra-high pressure mercury lamps, thereafter, the stamper 4 and the cured substrate are peeled in the 1st stage. A thin film for recording is formed by a spin coating method on the information transfer surface of the substrate in the 2nd stage. The resin similar to the resin of the substrate is formed by a spin coating method on the recording film and is subjected to photosetting in the 3rd stage. The curing type resin material is continuously cured under rotation while said material is irradiated with light, etc., from above and below on side sets 1a, 1b, 1c on the rotating body 2 in the 1st, 2nd, 3rd stages. The optical disk obtd. in such a manner has no warpage, has the good resistance to heat and moisture, has no double refraction and has C/N as good as 55dB.


Inventors:
HORIE TAKAHIRO
TSUCHIDA SATORU
YOKONO HARUKI
ISHIBASHI TAKEHIKO
ABE MASAMI
Application Number:
JP14198488A
Publication Date:
December 15, 1989
Filing Date:
June 09, 1988
Export Citation:
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Assignee:
HITACHI CHEMICAL CO LTD
International Classes:
B29D17/00; G11B7/26; (IPC1-7): B29D17/00; G11B7/26
Attorney, Agent or Firm:
Hirose Akira