Method of forming micropatterns

摘要

A resist film is formed on a semiconductor substrate by using a chemical amplification resist which generates an acid (or base) in response to the radiation of KrF excimer laser light and which reacts with the acid (base). If the resist film is irradiated with the KrF excimer laser light through a mask, the acid (base) is generated in the surface of an exposed portion of the resist film, so that the surface of the exposed portion is made hydrophilic by the acid (base). If water vapor is supplied to the surface of the resist film, water is diffused from the surface of the exposed portion into a deep portion. If vapor of e.g. methyltriethoxysilane is sprayed onto the surface of the resist film in air at a relative humidity of 95%, an oxide film with a sufficiently large thickness is selectively formed on the surface of the exposed portion. $$