Patent ID: 9244348
Filing Date: 2016-01-26
CPC Classification: G03F

Claim Text:
1. A process for forming a resist pattern, comprising the steps of: applying a chemically amplified negative resist composition onto a processable substrate to form a resist film having a thickness of up to 100 nanometers thereon, exposing patternwise the resist film to high-energy radiation, and developing the exposed resist film with an alkaline developer to form a resist pattern having a narrow line width of 50 nanometers or less and having a design size width variation within 5 nanometers, an acid generator, a basic compound, an organic solvent, and optionally a surfactant, the resist polymer becoming insoluble in alkaline developer as a result of the leaving group undergoing an elimination reaction under the catalysis of an acid generated by the acid generator upon exposure to high energy radiation.