Patent ID: 7011934

Claim:
A pattern formation method comprising the steps of: forming, on a substrate, an underlying film having pores or including an organic material; forming a first molecular layer of trimethylsilyl groups on said underlying film by supplying hexamethyldisilazane onto a surface of said underlying film while annealing said substrate in a first chamber; allowing said underlying film having said first molecular layer thereon to stand outside the first chamber; forming a second molecular layer of trimethylsilyl groups on said first molecular layer by supplying hexamethyldisilazane onto a surface of said first molecular layer in a second chamber; forming a resist film made of a chemically amplified resist material above said underlying film having said second molecular layer thereon; performing pattern exposure by selectively irradiating said resist film with exposing light; and forming a resist pattern by developing said resist film after the pattern exposure.