Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3286721
Kind Code:
B2
Abstract:
PURPOSE: To suppress the molecular association of a phthalocyanine compd. by using a metal phthalocyanine compd. as a main component of a light absorbing layer.
CONSTITUTION: A light absorbing layer based on a metal phthalocyanine compd. represented by formula (wherein M is Mn, Fe, Co, Zn or Cd, either one of A1 and A2, A3 and A4, A5 and A6 and A7 and A8 is an -OR group or an -SR group and the other one of them is a hydrogen atom and R has a group containing-N=) is provided on a substrate having a data pit and/or a guide groove formed to the surface thereof by a coating method directly or through other layer and a protective layer is provided on the light absorbing layer.
Inventors:
Toru Yashiro
Application Number:
JP21424694A
Publication Date:
May 27, 2002
Filing Date:
August 16, 1994
Export Citation:
Assignee:
株式会社リコー
山田化学工業株式会社
山田化学工業株式会社
International Classes:
C09B47/067; G11B7/244; G11B7/248; B41M5/26; G11B7/26; (IPC1-7): B41M5/26; G11B7/24; G11B7/26
Domestic Patent References:
| JP447985A | ||||
| JP6339388A | ||||
| JP586301A | ||||
| JP63127447A | ||||
| JP3215466A |
Attorney, Agent or Firm:
Toshiaki Ikeura (1 outside)
Toshiaki Ikeura
Toshiaki Ikeura