Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICAL RECORDING MEDIUM AND INFORMATION RECORDING METHOD
Document Type and Number:
Japanese Patent JP09194748
Kind Code:
A
Abstract:

To obtain an optical recording medium having an organic coloring matter layer containing a benzopyran compound expressed by a specific formula, and capable of forming good fine optical recording portions substantially free from a rim, and small in the jitter of a bit length.

This optical recording medium for recording or regenerating information with a laser ray having a wavelength of 620-690nm is obtained by disposing an organic coloring matter layer containing a benzopyran compound expressed by formula I [R1 and R2 are each a (substituted) alkyl, a cycloalkyl, an aryl, etc.; (X) is H, an alkyl, an alkoxy, a halogen, cyano, etc.; (Y) is an oxygen atom, a sulfur atom, etc.; the ring A is an aromatic carbocyclic group or an aromatic heterocyclic group which may be substituted] on a substrate (e.g. a polycarbonate substrate). The compound is preferably a compound expressed by formula II (R3 and R4 are each a 1-12 alkyl; R5 is an oxygen atom, a nitrogen atom, etc.; R6 and R7 are each H, an alkyl, an alkoxy, etc.), e.g. a compound of formula III.


Inventors:
Maeda, Shuichi
Application Number:
JP1996000006084
Publication Date:
July 29, 1997
Filing Date:
January 17, 1996
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI CHEM CORP
International Classes:
C09B57/00; G11B7/244; C09B57/00; G11B7/24; (IPC1-7): C09B57/00