# US 5,702,792 A · Optical recording medium

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- Number: US 5,702,792 A
- Document ID: US5702792A
- Status: Granted
- Kind: A
- Application number: 08/675,317
- Filed: 1996-07-01
- Granted: 1997-12-30
- Earliest claimed: 1995-07-14
- Assignees: Pioneer Electronic Corporation
- Inventors: Tetsuya Iida; Satoshi Jinno; Takanobu Higuchi
- Web page: https://patentgrep.com/patent/US5702792A

## CPC

- G11B 7/252: of layers other than recording layers
- G11B 7/258: of reflective layers
- G11B 7/2533: comprising resins
- G11B 7/2534: polycarbonates [PC]
- G11B 2007/25706: {containing transition metal elements (Zn, Fe, Co, Ni, Pt)}
- G11B 2007/2571: {containing group 14 elements except carbon (Si, Ge, Sn, Pb)}
- G11B 2007/25715: {containing oxygen}
- G11B 2007/25716: {containing sulfur}
- Y10S 428/913: Material designed to be responsive to temperature, light, moisture
- Y10S 430/146: Laser beam
- Y10T 428/21: Circular sheet or circular blank
- Y10T 428/31663: As siloxane, silicone or silane
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An optical recording medium of a multi-layer type comprises; a single or plural spacer layers each carrying pits and/or grooves; a single or plural reflective layers layered on the spacer layers; and a silane coupling treatment layer formed between the reflective layer and the spacer layer adjacent to each other.

## Claims

### Claim 1

An optical recording medium of a multi-layer type comprising:
a substrate
a single or plural spacer layers each carrying pits and/or grooves;
a single or plural reflective layers layered on the spacer layers; and
wherein said reflective layer is made of a material including --OH groups and a surface of said reflecting layer furthest from said substrate contacting with said spacer layer is provided with a silane coupling treatment.

### Claim 2

An optical recording medium of a multi-layer type comprising:
a substrate
a single or plural spacer layers each carrying pits and/or grooves;
a single or plural reflective layers layered on the spacer layers; and
wherein said reflective layer is made of one or more oxide thin films and a surface of said reflecting layer furthest from said substrate contacting with said spacer layer is provided with a silane coupling treatment.