Patent ID: 9440375
Filing Date: 2016-09-13
CPC Classification: B29C,B82Y,C03C,C04B,G03F

Claim Text:
1. A blank for mold production comprising: a hard mask film comprising a material comprising chromium and tin, and a substrate capable of being etched by fluorine-containing dry etching, wherein the hard mask film is disposed on the substrate, and the hard mask film has a thickness of 1 to 10 nm, wherein the material comprising chromium and tin has a content of tin of not under 0.01 times the content of chromium in atomic ratio and not over 2 times the content of chromium in atomic ratio, and the concentration of tin in the material comprising chromium and tin varies in a thickness direction of the material, and wherein the substrate capable of being etched by fluorine-containing dry etching is a substrate comprising a silicon-containing material.