REFLECTIVE Ag ALLOY FILM FOR REFLECTOR HAVING HIGH REFLECTIVITY, EXCELLENT WEATHER RESISTANCE, AND EXCELLENT HEAT RESISTANCE AND REFLECTOR USING THE SAME

摘要

PURPOSE: A reflective Ag alloy film for reflector and a reflector using the same are provided to enhance durability by adding characteristics of high reflectivity, excellent weather resistance, and excellent heat resistance thereto. CONSTITUTION: A reflective Ag alloy film for reflector includes an Ag alloy thin film containing Bi and a Bi layer and/or a Bi oxide layer formed on a surface of the Ag alloy thin film and/or between the Ag alloy thin film and another layer formed on the Ag alloy thin film. The Bi layer and/or the Bi oxide layer has a thickness of 2.0 nm or below. The Ag alloy thin film has a Bi content in the range of 0.01 to 3.0 atom percent. The Ag alloy thin film contains Nd or Y or both Nd and Y in a content in the range of 0.1 to 3.0 atom percent.