Optical Recording Medium

Abstract: An optical recording medium prohibiting the grazing or formation from being produced on its light transmitting layer to assure optimum recording and/or reproduction. The optical recording medium includes a substrate, 0.3 mm to 102 mm in thickness, and a light transmitting layer, 3 um to 177 um in thickness, bonded on the recording lyer. The information layer be record and/or reproduce by irradiating the light from the side of the light trasmitting layer.The surface of the light transmitting layer is surface-processed with a view to increasing the hardness, reducing the frictional coefficient and to prevention of eletrification. The surface processed light transmitting layer has a hardness not less than 13 MHz in terms of Vickers hardness. Alternatively the surface-processed light transmitting layer has a hardness not less than 0.5 GPa and a Young's modulus less than 4GPa as measured by the nano-indentation method

Patent Information

Application #

Filing Date

05 May 2000

Publication Number

21/2005

Publication Type

INA

Invention Field

ELECTRONICS

Status

Email

Parent Application

Applicants

SONY CORPORATION

7-35 Kitashinagawa 6- chome, Shingawa-Ku, Tokyo 141-0001

Inventors

1. MOTOHIRO FURUKI

c/o Sony Corporation, 7-35 Kitashinagawa 6- chome, Shingawa-Ku, Tokyo 141-0001

2. TOMOMI YUKUMOTO

c/o Sony Corporation, 7-35 Kitashinagawa 6- chome, Shingawa-Ku, Tokyo 141-0001

3. TAKESHI YAMASKI

c/o Sony Corporation, 7-35 Kitashinagawa 6- chome, Shingawa-Ku, Tokyo 141-0001

Specification

Documents

Application Documents

#	Name	Date
1	416-mum-2000-power of authority(4-9-2000).pdf	2018-08-08
2	416-mum-2000-form 5(5-5-2000).pdf	2018-08-08
3	416-mum-2000-form 3(5-5-2000).pdf	2018-08-08
4	416-mum-2000-form 2(title page)-(5-5-2000).pdf	2018-08-08
5	416-mum-2000-form 2(5-5-2000).pdf	2018-08-08
6	416-mum-2000-form 19(15-4-2004).pdf	2018-08-08
7	416-mum-2000-form 1(5-5-2000).pdf	2018-08-08
8	416-mum-2000-drawing(5-5-2000).pdf	2018-08-08
9	416-mum-2000-drawing(22-9-2000).pdf	2018-08-08
10	416-mum-2000-description(complete)-(5-5-2000).pdf	2018-08-08
11	416-mum-2000-correspondence(ipo)-(11-7-2008).pdf	2018-08-08
12	416-mum-2000-correspondence(10-4-2004).pdf	2018-08-08
13	416-mum-2000-claims(5-5-2000).pdf	2018-08-08
14	416-mum-2000-cancelled pages(5-5-2000).pdf	2018-08-08
15	416-mum-2000-abstract(5-5-2000).pdf	2018-08-08