Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making named article
Patent
1997-03-21
1998-06-02
Angebranndt, Martin
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making named article
430331, 430326, 430421, G11B 726
Patent
active
057597499
ABSTRACT:
A photo-resist layer of positive type, which is formed by a predetermined thickness on a disc substrate and which is exposed by a light beam modulated in accordance with record information to produce an optical record medium comprising the photo-resist layer and the disc substrate, is developed by the developing method. The developing method includes the steps of: firstly developing the exposed photo-resist layer by alkaline developing solution which has a normality of 0.17 to 0.19N for a first time period such that the photo-resist layer be incompletely developed to a predetermined depth from a surface of the exposed photo-resist layer; firstly washing the firstly developed photo-resist layer to stop the firstly developing step, and firstly drying the firstly washed photo-resist layer; secondly developing the firstly dried photo-resist layer by the alkaline developing solution for a second time period which is longer than the first time period such that the photo-resist layer be completely developed to a pit depth; and secondly washing the secondly developed photo-resist layer to stop the secondly developing step, and drying the secondly washed photo-resist layer to produce the optical record medium recorded with the record information as a developed pit pattern.
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Fukuoka Satoru
Kosaka Hiroyuki
Angebranndt Martin
Pioneer Electronic Corporation
Pioneer Video Corporation
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