Patent ID: 9291897
Filing Date: 2016-03-22
CPC Classification: C08F,C09D,G03F,H01L

Claim Text:
1. A pattern forming method comprising, in order, (1) a step of forming a film by using an actinic ray-sensitive or radiation-sensitive resin composition containing a compound capable of generating an acid upon irradiation with an actinic ray or radiation, a resin (Ab) having a repeating unit represented by the following formula (Ab1) and a repeating unit represented by the following formula (A), and a solvent, (2) a step of exposing the film, and (3) a step of developing the exposed film by using an organic solvent-containing developer to form a negative pattern: wherein in formula (Ab1), R′ represents a hydrogen atom or an alkyl group, L L represents a single bond or a divalent linking group, and when L R R R wherein in formula (A), each of R X L Ar n represents an integer of 1 to 4.