Optical information record medium

• Main Author: UNO MAYUMI,YAMADA SHO,OSADA KENICHI
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2004
• Edition: 7
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

通过实现可以提高记录介质的冷却能力和降低重写标记畸变的高透过率的介质，提供更高速度、高记录密度的光学信息记录介质。在基板(1)上，顺序沉积保护层(2)、界面层(3)、利用激光照射使光学特性可逆变化的记录层(4)、界面层(5)、透过波长λ的所述激光的透光型反射层(6)和热扩散层(7)。在热扩散层(7)的折射率为n时，将热扩散层(7)的膜厚d设定在0＜d≤(5/16)λ/n或(7/16)λ/n≤d≤(1/2)λ/n的范围内，上述反射层位于上述热扩散层和上述记录层之间。 An optical information recording medium is provided in which recording can be performed at higher speed with higher density by enabling the cooling power of the recording medium to be improved, the overwritten-mark distortion to be decreased, and an medium with high transmittance to be obtained. The optical information recording medium is formed by laminating, sequentially on a substrate 1: a protective layer 2; an interface layer 3; a recording layer 4 whose optical characteristics are varied reversibly by irradiation of a laser beam; an interface layer 5; a light transmittance type reflective layer 6 that transmits the laser beam with a wavelength lambda ; and a thermal diffusion layer 7. A thickness d of the thermal diffusion layer 7 is set to be within a range of 0 < d </= (5/16) lambda /n or (7/16) lambda /n </= d </= (1/2) lambda /n, wherein n indicates a refractive index of the thermal diffusion layer 7.