Patent ID: 11967503
Assignee: WONIK IPS CO., LTD
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC H

Claim 11:
12. A method of manufacturing a semiconductor device, the method comprising:
forming an underlayer on a semiconductor substrate;
depositing, on the underlayer, a lower thin film having etching selectivity relative to the underlayer at a low temperature range;
depositing, on the lower thin film, an upper thin film having etching selectivity relative to the lower thin film at the low temperature range;
performing a plasma treatment of the upper thin film, thereby forming a hard mask including the lower thin film and the upper thin film with the plasma treatment;
patterning the underlayer by using the hard mask,
wherein the low temperature range is in a range of 100° C. to 250° C.,
the upper thin film is deposited using reactive gas and source gas contained in a larger amount than the reactive gas, and
the reactive gas includes nitrogen and oxygen.