Patent ID: 8426105
Filing Date: 2013-04-23
Classification: G03F

Abstract:
1. In connection with a pattern forming process comprising at least the steps of: (1) coating a first positive resist composition comprising a polymer comprising recurring units adapted to increase alkali solubility under the action of acid and recurring units having lactone structure onto a substrate and baking 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 an alkaline developer to form a first resist pattern, (2) applying a resist-modifying composition to the first resist pattern and heating to modify the first resist pattern, and (3) coating a second positive resist composition thereon and baking 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 an alkaline developer to form a second resist pattern, the resist-modifying composition comprising a carbamate compound and a solvent, said carbamate compound being at least one selected from the group consisting of compounds represented by the following formulae: wherein Boc is t-butoxycarbonyl.