| 摘要 |
PURPOSE:To obtain a DRAW-type optical disc capable of preventing recording sensitivity from depending on wavelength and obtaining satisfactory regenerated signal by forming a recording film containing specific two types of phthalocyanine, a reflective film and a protecting film sequentially on a transparent substrate. CONSTITUTION:A recording film formed using a spin coat technique on a transport substrate consists of a phthalocyanine compound expressed by formula I [X1 to X4 are an alkyl group, an alkoxy group, an alkylthio group, etc.; k, l, m, n are an integer of 0 to 2; M1 is Al, Ga, In, Si, Ge, Sn; Z1 is formula II (R1, R2 are an alkyl group, etc.); y1 is an integer of 1 or 2], and a phthalocyanine compound expressed by formula III [X5 to X8, o, p, q, r and M2 are the same as formula I; Z2 is formula IV (R5 is an alkyl group, etc.); y2 is an integer of 1 or 2]. Further, a protecting film is formed on the recording film following the formula of a vacuum-evaporated metal film, using an ultraviolet curable resin under a spin coat system and thus a DRAW-type optical disc is obtained. |
