Dynamic information storage or retrieval – Storage medium structure – Layered
Patent
1987-06-12
1988-04-26
Stephan, Steven L.
Dynamic information storage or retrieval
Storage medium structure
Layered
3461351, 369284, 369288, G11B 724
Patent
active
047409479
ABSTRACT:
A first optical memory disc and a second optical memory disc are fixed to each other by an adhesive layer so as to form a dual-surface optical memory disc. In a manufacturing step, an adhesive, preferably pre-cured photo-polymer mixed with spherical spacer elements, is painted on either one of or both of the first and second optical memory discs. When a predetermined pressure is applied between the two optical memory discs, the thickness of the adhesive layer is fixed by the diameter of the spherical spacer elements. While the pressure is applied between the two optical memory discs, ultraviolet rays are applied to the adhesive layer through one of the first or second optical memory discs so as to cure the photo-polymer, thereby tightly joining the first and second optical memory discs to each other.
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Hirogane Junji
Katayama Hiroyuki
Murakami Yoshiteru
Ohta Kenji
Takahashi Akira
Sharp Kabushiki Kaisha
Stephan Steven L.
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