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

Claim 11:
12. A method for producing a semiconductor device, the method comprising the steps of:
(a) forming an organic underlayer film on a semiconductor substrate;
(b) 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;
(c) applying a composition for a resist onto the silicon hard mask to form a resist layer;
(d) exposing the resist film and developing the resist after the exposure to obtain a resist pattern;
(e) applying the coating composition according to claim 1 onto the resist pattern to embed the polysiloxane;
(f) curing the embedded polysiloxane and then etching or ashing the resist film to reverse the pattern;
(g) etching the silicon hard mask using the reversed pattern;
(h) etching the organic underlayer film using the pattered silicon hard mask to form a patterned organic underlayer film; and
(i) processing the substrate using the patterned organic underlayer film.