光記録媒体及びこれを用いる光記録方法

Japanese Patent JP4183918

B2

PROBLEM TO BE SOLVED: To provide a recording material, contained in an optical recording medium, which can be applied to a DVD-R disc system using a semiconductor laser having an oscillated wave length on the short wave length side, compared to a conventional system and especially shows outstanding light resistance and shelf stability in the optical recording medium using a conventional squalirium coloring matter as well as a recording method using the recording material. SOLUTION: In the optical recording medium with a recording layer formed on a substrate, the recording layer contains a squalirium compound and at least one kind each of an azo compound represented by formula (I) (wherein, A and B are independently a residue forming an aromatic ring which may have a substituent group or a heterocycle which may have a substituent group, together with a carbon atom with which the residue is bonded; and X is a substituent group having an active hydrogen group) and an azo metal chelate compound comprising a metal.

Mune Noguchi
Tsutomu Sato
Tatsuya Tomura
Ikuo Shimizu
Hiroshi Toyoda
Kinugasa Motoharu
Shiho Yamada
Masanori Ikuta
Kenji Muto

JP2001036632A

November 19, 2008

February 14, 2001

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株式会社リコー
協和発酵ケミカル株式会社

B41M5/26; B32B9/00; B32B15/08; B32B15/20; C07D209/14; C07D209/88; C07D401/12; C07D403/08; C07D417/12; C07D455/04; C07D487/04; C09B23/00; C09B45/00; C09B45/14; C09B45/18; C09B45/20; C09B45/22; C09B57/00; G11B7/0045; G11B7/24035; G11B7/24079; G11B7/244; G11B7/249; G11B7/258; G11B7/2585; G11B7/259

JP60260549A
JP4361088A
JP5306282A
JP5306285A
JP10058828A
JP2000062320A
JP2001322356A

WO2001044233A1
WO2001044375A1

Koichi Hirota

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