Patent TW-340864-B (TW)
Title: Optical recording medium
Inventor: MISAWA TSUTAMI
IPC: G11B7/249
Filed: 1996-07-11
Granted: 1998-09-21
Abstract: A optical recording medium comprising at least a dye layer, a reflective layer and protective layer provided on a a substrate, characterized by: the dye layer containing an azo compound with formula (2) or a metal complex selected from Ni, Pd, Zn or Co thereof having an absorption maximum at a wavelength falling in a range of 450 to 630nm and a phthalocyanine compound with formula (2) having an absorption maximum at a wavelength falling in the range of 680 and 900nm, and the recording medium can be recorded and/or reproduced with laser light having a wavelength λ1 selected from a range of 770 to 830nm and recorded and/or reproduced as well with laser light having a wavelength λ2 selected from a range of 620 to 690nm, where R1 and R2 each independently represent hydrogen atom; alkyl with total carbon number 1 ~ 7 substitutable by halogen, hydroxy, alkylcarboxyl of carbon number 1 ~ 4, dioxypyrrolidine, alkylcarbonamine with carbon number 1~ 4, alkylcarboxy with carbon number 1 ~ 4, alkoxy wth carbon number 1 ~ 4, cyano, hydroxyalkoxy with carbon number 1 ~ 4, alkylsulfurylamide with carbon number 1 ~ 4 or acryl with carbon number 1 ~ 4; R3, R4, R5 and R6 each independently represent hydrogen atom; halogen; hydroxyl, carboxyl; sulfo; sulfurylamide; amino; alkyl having total carbon number 1 ~ 7; alkoxy having total carbon number 1 ~ 7; phenyl; acyl having total carbon number 1~ 7; alkylcarboxyl having total carbon number 2 ~ 8; alkylcarbonylamino substituted by halogen having total carbon number 2 ~ 8; alkylsulfurylamide having total carbon number 1 ` 7; alklyamino having total carbon number 1 ~ 7; alkylsulfuryl having total carbon number 1 ~ 7; ene having total carbon number of 2 ~ 7; R1 and R2 bonded with nitrogen atom together form: (formula) or R1, R4, R2, R6 and nitrogen bonded with R1 and R2, and carbon bonded with R4 and R5 together form: (formula), R7 represents hydrogen; halogen; hydroxyl; carboxyl; sulfo, sulfurylamide; amino; alkyl having total carbon number 1 ~ 7 and substitutable by halogen; alkoxy having total carbon number 1 ~ 7; phenyl substitutable by alkyl having carbon number 1 ~ 4; acyl ahving total carbon number 1 ~ 7; alkylcarbooxyl havnig total carbon number 2 ~ 8; alkyl having carabon number 1 ~ 7 and substituted by phenyl; alkylcarbonamino having total carbon number 2 ~ 8; alkylsulfurylamide having total carbon number 1 ~ 7; alkylamino having total carbon number 1 ~ 7; alkylsulfuryl having carbon number 1 ~ 7; ene-cyano having total carbon number 2 ~ 7; nitro; mercaptol; thiocyano; chlorosulfuryl; alkylthio having total carbon number 1 ~ 7 and substitutable by alkylcarboxyl having carbon number 1 ~ 4; alkylazomethylidyne having carbon number 2 ~ 8; or alkylaminosulfuryl having total carbon number 1 ~ 7; X represents sulfur or N-R8 (wherein R8 represents hydrogen; alkyl having total carbon number 1 ~ 7; phenyl substitutable by nitro; alkyl having carbon number 1 ~ 7 and substituted by phenyl; ene havig total carbon number 1 ~ 7); Y represents nitrogen or C-R9 (wherein R9 is defined the same as R7); but when X is sulfur, Y is nitrogen; X is N-R8, Y is C-R9); [in formula (2), Y1, Y2, Y3, Y4, Y5, Y6, Y7 and Y8 each independently represents hydrogen; C1~4 alkoxy substitutable by halogen, C1~4 alkoxy-C1~4alkoxy, alkoxy having total carbon number 1 ~ 8 substitutable by C 1 ~ 4 alkylamino, alkylthio having total carbon number 1 ~ 8 substitutable by C1~4 alkoxy-C1~4alkoxy; and A1, A2, A3 and A4 each independently represent halogen or nitro; l1, l2, l3 and l4 represent integer of 0 ~ 4; m1, m2, m3 and m4 represent integer of 0 ~ 3; M represents two hydrogen atoms; divalent metal atom of Cu, Zn, Fe, Co, Ni, Ru, Pd, Pt, Mg, Ti, Be, Ca, Ba, Pb and Cd divalent metal atom, trivalent metal with one substitution group of Al-Cl, Al-Br, Ga-Cl, Ba-Br, In-Cl, In-Br, Ti-Cl, Ti-Br, Al-C6H8, Al-C6H4(CH)8, In-C10H7, Mn(OH), Mn(OC6H5), Mn(OSi(CH8)8)], Fe-Cl, Ru-Cl, and tetarvalent emtal atom of CrCl2, SiCl2, GeCl2, SnCls, TiCl2, Mn(OH)2, Sn(OH)2, TiR2, CrR2, SiR2, SnR2, GeR2 (R^ represents alkyl, phenyl, naphthyl and derivatives thereof), Ti(OR^)2, Cr(OR^)2, Si(OR^)2, Sn(OR^)2(R^ represents alkyl, phenyl, nphthyl, trialkylsilane, dialkylalkoxysilanyl and derivatives thereof) or metal oxide of VO, MnO, or TiO.