Patent ID: 9337093
Filing Date: 2016-05-10
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device comprising: forming a first insulating film using a cyclic siloxane having a six-membered ring structure as a raw material; forming a second insulating film over the first insulating film, using a cyclic siloxane having a six-membered ring structure as a raw material; forming a trench in the second insulating film; forming a via hole in the first insulating film such that an upper end of the via hole is connected to a bottom surface of the trench; forming a modified layer on the bottom surface of the trench by treating the bottom surface of the trench with plasma generated from a carbon dioxide gas, wherein in forming the trench and the via hole in the first and second insulating films, the modified layer is formed on a sidewall of the via hole, and further wherein in forming the modified layer, the modified layer is formed on a bottom surface of the via hole concurrently when the modified layer is formed on the bottom surface of the trench; and forming an interconnect by embedding the trench with a metal film.