Patent ID: 9457493
Filing Date: 2016-10-04
CPC Classification: B05D,B29C,B29K,C23C,C25D

Claim Text:
1. A method for producing a cylindrical nanoimprinting mold in which an oxide film having a plurality of fine pores is formed on an outer peripheral surface of a cylindrical aluminum substrate, the method comprising: a step (I) of polishing the whole outer peripheral surface of the aluminum substrate by rubbing the outer peripheral surface of the aluminum substrate with a polishing body, which has a length along an axis direction of the aluminum substrate shorter than a length of the aluminum substrate in the axis direction, while relatively moving the polishing body and the aluminum substrate rotating around a central axis; and a step (II) of forming the oxide film on the outer peripheral surface of the aluminum substrate by anodization after the step (I), wherein in the step (I), support members are disposed at both ends of the aluminum substrate in the central axis direction and polishing is performed by relatively moving the polishing body in the axis direction with respect to the outer peripheral surface of the aluminum substrate rotating around the axis such that at least a part of the polishing body protrudes beyond the end of the aluminum substrate in the axis direction, at least the part, which protrudes beyond the aluminum substrate, of the polishing body is disposed on the support member, and the shape obtained by cutting the surface of the portion, in which the polishing body is disposed, of the support member in a direction perpendicular to the axis direction of the aluminum substrate is an arc shape configuring at least a part of circumference having a diameter substantially equal to or less than the outer diameter of the aluminum substrate.