(19)
(11) EP 2 360 694 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
04.01.2012 Bulletin 2012/01

(43) Date of publication:
24.08.2011 Bulletin 2011/34

(21) Application number: 11004044.1

(22) Date of filing: 19.02.2007
(51) International Patent Classification (IPC): 
G11B 7/247(2006.01)
(84) Designated Contracting States:
DE FR GB

(30) Priority: 14.03.2006 JP 2006069137

(62) Application number of the earlier application in accordance with Art. 76 EPC:
07714490.5 / 2002986

(71) Applicant: Adeka Corporation
Tokyo 116-8554 (JP)

(72) Inventors:
  • Yanagisawa, Satoshi
    Tokyo 116-8554 (JP)
  • Kubota, Yusuke
    Tokyo 116-8554 (JP)

(74) Representative: Forstmeyer, Dietmar et al
BOETERS & LIECK Oberanger 32
80331 München
80331 München (DE)

 
Remarks:
This application was filed on 16-05-2011 as a divisional application to the application mentioned under INID code 62.
 


(54) Optical recording medium


(57) An optical recording medium having a substrate and an optical recording layer on the substrate. The optical recording layer is formed of an optical recording material containing at least one heterocyclic compound represented by general formula (III):

wherein Z1 represents oxygen, sulfur, -CR5R6-, etc. (R5 and R6 are each a substituent, e.g., an alkyl group or an aralkyl group, or are taken together to form a ring); R1 and R2 each represent hydrogen, etc.; R3 and R4 each represent an alkyl group having 1 to 8 carbon atoms or are taken together to form a heterocyclic ring having no multiple bond; An'- represents a q-valent anion; q represents 1 or 2; p represents a number necessary to neutralize an electric charge; and m represents a number of 1 to 4.