Patent ID: 7960090
Filing Date: 2011-06-14
Classification: B82Y,G03F

Abstract:
1. A pattern forming method comprising: a step of forming a pattern of a resist on a transfer layer provided on a thin film, provided on a surface of a base material of a first material, of a second material; a step of forming a first reverse layer of a third material on the pattern of the resist; a step of forming a first reverse pattern, of the first reverse layer complementary to the pattern of the resist by removing the resist after removing the reverse layer to expose a surface of the resist; a step of forming a second reverse pattern comprising the transfer layer and the first reverse pattern formed on the transfer layer by etching the transfer layer using the first reverse pattern as a mask; a step of forming a second reverse layer of the third material on the second reverse pattern; a step of forming a third reverse pattern, of a second reverse layer, complementary to the first reverse pattern by removing the transfer layer after removing the second reverse layer and the first reverse pattern to expose a surface of the transfer layer; a step of forming a hard mask layer comprising the thin film, on which the third reverse pattern is formed, by etching the thin film using the third reverse pattern as a mask; and a step of etching the base material using, as a mask, the hard mask layer on which the third reverse pattern remains or the hard mask layer on which the third reverse pattern has been removed.