Patent ID: 6643078
Filing Date: 2003-11-04
Classification: C03C,G02B,Y10S

Abstract:
An aluminum reflecting mirror in which first to fifth layers are laminated on a glass substrate successively from said glass substrate side;wherein said first layer is a protective film formed by depositing SiO, said second layer is an aluminum reflective film formed by depositing Al, said third layer is a transparent protective film formed by depositing MgF2 and comprised of a two-layer structure composed by a lower layer formed by lower-temperature deposition and an upper layer formed by a higher-temperature deposition, wherein said lower-temperature deposition is carried out at a temperature sufficient to prevent said aluminum reflective film from lowering its reflectivity and said higher-temperature deposition is carried out at a temperature to strengthen said third layer, said fourth layer is a transparent protective film formed by depositing CeO2, and said fifth layer is a transparent protective film formed by depositing SiO2.