Patent ID: 8741554

Claim:
A process for forming a pattern, comprising the steps of: coating a first positive resist composition comprising a copolymer comprising recurring units having lactone as an adhesive group and recurring units having an acid labile group, a photoacid generator, and a base generator onto a substrate to form a first resist film, exposing the first resist film to high-energy radiation, post-exposure baking, and developing the first resist film with a developer to form a first resist pattern, heating the first resist pattern at 100 to 180° C. for 3 to 180 seconds for causing the base generator to generate an amine compound for inactivating the first resist pattern to acid without crosslinking and insolubilizing the first resist pattern by heating, coating a second positive resist composition comprising a solvent which contains an alcohol of 3 to 8 carbon atoms and an optional ether of 6 to 12 carbon atoms and which does not dissolve away the first resist pattern onto the first resist pattern-bearing substrate to form a second resist film, exposing the second resist film to high-energy radiation, post-exposure baking, and developing the second resist film with a developer to form a second resist pattern.