Method For Forming An Anodized Layer, Method For Manufacturing A Mold, and Mold

A method for forming an anodized layer, comprising the steps of:

• (a) providing an aluminum base which has a machined surface;
• (b) forming, in the surface of the aluminum base, a minute uneven structure which has a smaller average neighboring distance than an average neighboring distance of a plurality of minute recessed portions that an intended porous alumina layer has;
• and
• (c) after step (b), anodizing the surface of the aluminum base, thereby forming a porous alumina layer which has the plurality of minute recessed portions.

A method for forming an anodized layer, comprising the steps of:

• (a) providing a base in the form of a roll;
• (b) depositing an aluminum layer on a perimeter surface of the base that is in the form of a roll;
• and
• (c) anodizing the surface of the aluminum layer, thereby forming a porous alumina layer which has a plurality of minute recessed portions.