| 摘要 |
PURPOSE:To improve reliability and life by covering the whole surface of a tempered glass substrate with layers of specific metal oxides or composite oxides. CONSTITUTION:The optical memory consists of the tempered glass substrate 1, a diffusion preventing layer 2, hard coat layer 3, groove layer 4, reflecting film 5, protective film 6 and protective resin layer 7. The diffusion preventing coated layer 2 comprises oxides or composite oxides of at least one kind of element selected from Ba, Rb, Sn, Si, Sr and Ti. It is provided on the whole surface of the glass substrate 1 to prevent diffusion of Na2O, K2O and CaO contained in the substrate as a corrosion resistant and deterioration resistant content. |
