Back to results
US 4,939,011 AGranted
Optical disk
AssigneeNitto Denko Corporation
InventorsHidekazu Takahashi, Tadanori Michimoto, Yasuo Mitoh, Eiji Takabatake
Life of this patent
Estimating the term…
Abstract
An optical disk comprising a pair of substrates, each having a recording surface and a reflective layer in super-position on one side, is disclosed. Such an optical disk has satisfactory shear adhesive strength and peeling strength under high temperature and high moisture conditions.
Claims8
An optical disk comprising:
- a pair of substrates, each having a recording surface and a metallic reflective layer in superposition on one side, said pair of substrates positioned in such a manner that the reflective layer on one substrate faces the reflective layer on the other substrate, and
- a smooth-surfaced silicone-made double-side pressure-sensitive adhesive member bonding said pair of substrates together.
An optical disk comprising:
- a pair of substrates, each having a recording surface and a metallic reflective layer in superposition on one side, said pair of substrates positioned in such a manner that the reflective layer on one substrate faces the reflective layer on the other substrate,
- a spacer interposed between said pair of substrates at both outer peripheral and inner peripheral portions of said pair of substrates, and
- a smooth-surfaced silicone-made double-side pressure-sensitive adhesive member bonding said pair of substrates together.
An optical disk as claimed in claimed 5, wherein said a smooth-surfaced silicone-made double-side pressure-sensitive adhesive member consists essentially of:
- a mixture or condensation product of
- a copolymer resin consisting essentially of SiO.sub.2 units and R.sub.3 SiO.sub.0.5 units;
- and
- a diorganopolysiloxane consisting essentially of R.sub.2 SiO,
- wherein R is an alkyl group having 1 to 4 carbon atoms, an alkenyl group, or an aryl group.
2 more elements
Dependencies are inferred from the claim text.