Patent ID: 6872452
Filing Date: 2005-03-29
Classification: C23C,G02B,Y10T

Abstract:
1. A high refractive dielectric film constructing a dielectric multi-layer film in which a high refractive dielectric film having a relatively high refractive index and a low refractive dielectric film having a relatively low refractive index are alternately laminated on a transparent substrate, wherein the high refractive dielectric film is made of an amorphous material having no columnar structure, obtained by adding to titanium oxide (TiOx: 1<x<2) another metal oxide (MOy: 1≦y≦5/2) selected from the group consisting of niobium oxide (NbOy), and tantalum oxide (TaOy) and the ratio of the other metal component to the total amount of metal components (M/(Ti+M)) is 30 atom % or more and the low refractive dielectric film is made of an amorphous material having no columnar structure, obtained by adding to silica.