Patent ID: 11862471
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A manufacturing method for a semiconductor device comprising:
performing first etching for forming a recess in a layer to be processed using a reactive ion etching method;
performing a first treatment of supplying a silylation agent to the recess after the performing the first etching, a side film including carbon being formed on a sidewall of the recess by the first treatment, the side film being formed directly on the layer to be processed by silylation reaction; and
performing second etching of etching a bottom surface of the recess using a reactive ion etching method after the performing the first treatment,
wherein the silylation agent contains at least one chemical selected from the group consisting of phenyldimethylsilvldimethylamine, trimethylmethoxysilane, dimethylmethoxysilane, methyltrimethoxysilane, and methoxydimethylphenylsilane.