Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1997-01-27
1999-05-25
McPherson, John A.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430945, 369284, 428 652, G11B 724
Patent
active
059069074
ABSTRACT:
The object of the present invention is to provide an optical disc and a method of manufacturing thereof wherein defects and deterioration in the optical disc are minimized at the time of manufacture, during operation and storage thereof as well. The invention conceives an optical disc suitable for accomplishing the above object through spcifications such as providing a cross-sectional structure thereof comprising a pair of transparent substrates each provided with at least one layer of a recording film formed on the surface of information patterns thereof, with the pair being bonded and laminated with an adhesive, and further providing an instantaneous axial acceleration<2 G measured at room temperatures, a skew angle<5 mrad measured at room temperatures, and a skew angle<5 mrad measured after being left for one hour as heated to 80.degree. C. (otherwise, a shear mass<20 .mu.m measured after being left for one hour as heated to 80.degree. C.), and still further by utilizing a reaction adhesive the hardness of which after cure is between A30 and A80 in Shore hardness. On the other hand, preferred methods of manufacturing optical discs suitable for implementing the object of the invention were set forth, which utilize reaction adhesives having a Shore hardness after cure between A30 and A80.
REFERENCES:
patent: 4711798 (1987-12-01), Ueda et al.
patent: 4760012 (1988-07-01), Mochizuki
patent: 4799210 (1989-01-01), Wilson et al.
patent: 4939011 (1990-07-01), Takatashi
patent: 5013593 (1991-05-01), Matsuzawa
patent: 5053288 (1991-10-01), Hashimoto et al.
patent: 5189655 (1993-02-01), Ogata
patent: 5197060 (1993-03-01), Yatake
patent: 5197709 (1993-03-01), Tachibana
patent: 5214630 (1993-05-01), Goto et al.
patent: 5227213 (1993-07-01), Komori
patent: 5318653 (1994-06-01), Toide
patent: 5401610 (1995-03-01), Miwa
patent: 5540967 (1996-07-01), Toide et al.
patent: 5543271 (1996-08-01), Miwa
Koyama Eiji
Miwa Hiroaki
Sudo Ryoichi
Tajima Tetsuo
Hitachi , Ltd.
Hitachi Maxell Ltd.
McPherson John A.
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