Resist multilayer film-attached substrate and patterning process

Abstract

The present invention provides a resist multilayer film-attached substrate, including a substrate and a resist multilayer film formed on the substrate, in which the resist multilayer film has an organic resist underlayer film difficultly soluble in ammonia hydrogen peroxide water, an organic film soluble in ammonia hydrogen peroxide water, a silicon-containing resist middle layer film, and a resist upper layer film laminated on the substrate in the stated order. There can be provided a resist multilayer film-attached substrate that enables a silicon residue modified by dry etching to be easily removed in a wet manner with a removing liquid harmless to a semiconductor apparatus substrate and an organic resist underlayer film required in the patterning process, for example, an ammonia aqueous solution containing hydrogen peroxide called SC1, which is commonly used in the semiconductor manufacturing process.

Dependencies are inferred from the claim text.