Patent ID: 7144804
Filing Date: 2006-12-05
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a first insulating film having a relative dielectric constant smaller than 2.5 above a semiconductor substrate; forming a number of concavities in the first insulating film; forming a second insulating film having a relative dielectric constant larger than that of the first insulating film on the first insulating film so as to form a laminate structure film such that a bottom portion of the second insulating film is buried in a number of concavities formed in the first insulating film; forming a trench for burying a wiring in the laminate structure film; forming a conductive material layer on the laminate structure film including the trench; and applying a chemical mechanical polishing treatment to the conductive material layer such that the conductive material is left unremoved within the trench to form a buried wiring.