Patent ID: 9108351
Filing Date: 2015-08-18
Classification: B29C,C25D,G02B

Abstract:
1. An anodized layer formation method, comprising the steps of: (a) providing an aluminum film which is formed on a first principal surface of a support, a second principal surface of the support which is opposite to the first principal surface being provided with a low heat conduction member that has a predetermined pattern, providing the support which includes a base and an inorganic underlayer formed on a surface of the base, a surface of the inorganic underlayer being the first principal surface, forming an aluminum layer on the inorganic underlayer, forming a natural oxide film on a surface of the aluminum layer, and forming the aluminum film on a surface of the natural oxide film; and (b) anodizing a surface of the aluminum film to form a porous alumina layer that includes a first region and a second region which have a plurality of minute recessed portions, the second region having a pattern formed according to the predetermined pattern and the plurality of minute recessed portions in the second region having structures different from the plurality of minute recessed portions in the first region.