US 6,645,595 B2Granted

Optical medium

AssigneeSony Chemicals Corp.

InventorMieko Tanaka

Life of this patent

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Abstract

An optical disk contains a recording layer and an adhesive layer between at least two substrates, wherein the adhesive layer contains a cationic polymerizable resin (A), a photo-initiator (B), and an anion catcher (C). The weight ratio of the photo-initiator (B) and the anion catcher (C) is preferably from 3:1 to 3:24, more preferably from 3:1 to 3:12.

Claims8

Dependent claims

An optical medium having a recording layer and an adhesive layer between at least two substrates,

wherein the adhesive layer contains (A) a cationic polymerizable resin, (B) a photo-initiator, and (C) an anion exchanger.

Dependencies are inferred from the claim text.

Facts

Application: 09/822,427Filed 2 Apr 2001
Priority: JP 11-23569123 Aug 1999
Published: US 2001/0033544 A125 Oct 2001
Granted: 11 Nov 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

G11B 7/256
Of layers other than recording layers: of layers improving adhesion between layers
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 27/00
Layered products comprising a layer of synthetic resin
B32B 37/0015
Involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality: to avoid warp or curl

Family

US 2001/0033544 A1Pre-grant publication · published 25 Oct 2001
US 6,645,595 B2This patent

From the US filing history. Foreign family members aren’t listed.

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