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
1996-04-29
1999-02-16
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
43027012, 43027013, 430945, 369284, 369288, 428 643, 428 644, G11B 724
Patent
active
058718818
ABSTRACT:
A multilayer optical information medium provided with structure in which first and second substrates respectively provided with two to four layers of planar information areas are respectively arranged outside wherein the thickness of the above-described first and second substrates is set in the range of 0.52 to 0.65 mm. The above-described planar information area consists of embossed pits provided, for example on the surface of respective substrates or on the surface of a layer formed by transparent material and a semi-reflective layer provided on the embossed pits. A planar information area arranged in the farthest position from respective substrates is provided with a reflective layer in place of the above-described semi-reflective layer. The planar information area arranged in the farthest position from respective substrates may be constituted by a recording layer and a reflective layer provided on the recording layer.
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"Compact Disc Reader", Nakajima et al, Published by Ohm, Nov. 1982.
Abstract of JP 59-127237, Yamanaka (Jul. 1984).
Abstract of JP 60-202545, Oikawa et al. (Oct. 1985).
Anzai Yumiko
Ito Kenchi
Nakano Kazuhiko
Nishida Tetsuya
Sasaki Hisae
Hitachi , Ltd.
McPherson John A.
Nippon Columbia Co. Ltd.
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