Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1989-07-21
1991-03-26
Ryan, Patrick J.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428 65, 428 76, 428412, 428913, 369211, 346761, 3461351, 430495, 430945, 156 60, 427162, B32B 302
Patent
active
050028138
ABSTRACT:
A substrate for manufacturing an optical memory device includes one surface covered with a protective film provided with openings only in portions corresponding to recording layers to be formed on the substrate, thereby allowing the protective film to function as a mask for forming the recording layers in a recording layer forming process. Also disclosed is a method of manufacturing an optical memory device including the steps of continuously feeding a substrate covered with a protective film provided with openings only in portions corresponding to recording layers to be formed on the substrate, forming the recording layers through the openings on the substrate, forming guide tracks on the substrate, stripping the protective film from the substrate, cutting the substrate to a predetermined size, and forming a protective layer on the substrate.
Katayama Hiroyuki
Murakami Yoshiteru
Nakayama Junichiro
Ohta Kenji
Takahashi Akira
Ryan Patrick J.
Sharp Kabushiki Kaisha
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