| 摘要 |
PURPOSE:To obtain the optical disk having excellent reliability and weatherability by successively laminating a calcined layer of metal alcoholate, a reflecting film and a protective film on either one diffusion preventive layer of the diffusion preventive layers formed on both surfaces of a glass substrate. CONSTITUTION:The glass substrate 1 having no hygroscopic and moisture permeable properties is used and the diffusion preventive layers 2a, 2b are formed on both sides. The calcined layer 3 of the metal alcoholate having the glassy pit patterns obtd. by calcining an org. metal component is formed by using a technique known as a sol-gel method on one surface of the diffusion preventive layer; thereafter, the reflecting film 4 having high corrosion resistance and the protective film 5 are successively laminated. Various kinds of metals, metal nitride, etc., are usable as the material of the reflecting film 4 and more particularly, Au, Au alloy, TiN are preferable. The reliability and weatherability are improved in this way and the development to new application fields is possible. |
