Patent ID: 6887649

Claim:
A semiconductor device manufacturing method comprising the steps of: forming a lower resist layer on a patterning objective layer; forming an organic intermediate layer made of organic silicon-containing material, having no Siâ€”O bond in its structure, on the lower resist layer; forming an upper resist layer made of alicyclic resin on the organic intermediate layer; forming a pattern by exposing/developing the upper resist layer; transferring the pattern of the upper resist layer onto the organic intermediate layer by etching the organic intermediate layer selectively with respect to the lower layer while using the upper resist layer as a mask; transferring a pattern of the organic intermediate layer onto the lower resist layer by etching the lower resist layer while using the organic intermediate layer as a mask; and patterning the patterning objective layer by etching the patterning objective layer while using the lower resist layer and the organic intermediate layer as a mask.