Patent ID: 11884839
Assignee: NISSAN CHEMICAL CORPORATION
Field: Optics (Instruments)
Classification: CPC C  G | IPC C  G

Claim 12:
13. A method for producing a semiconductor device, the method comprising the steps of:
(1) forming an organic underlayer film on a semiconductor substrate;
(2) applying a silicon hard mask forming composition onto the organic underlayer film and baking the applied silicon hard mask forming composition to form a silicon hard mask;
(3) applying a composition for a resist onto the silicon hard mask to form a resist layer;
(4) exposing the resist film and developing the resist after the exposure to obtain a resist pattern;
(5) etching the silicon hard mask using the resist pattern;
(6) etching the organic underlayer film using the pattered silicon hard mask to form a patterned organic underlayer film;
(7) applying the coating composition according to claim 1 onto the patterned organic underlayer film to embed the polysiloxane;
(8) curing the embedded polysiloxane and then etching or ashing the organic underlayer film to reverse the pattern; and
(9) processing the substrate using the polysiloxane film.