Patent ID: 7291554

Claim:
A method for forming a semiconductor device comprising the steps of: forming a flowable film made of an insulating material with flowability; forming a first concave portion in said flowable film though transfer of a convex portion of a pressing face of a pressing member by pressing said pressing face against said flowable film; forming a solidified film having said first concave portion by solidifying said flowable film though annealing of said flowable film performed at a first temperature with said pressing face pressed against said flowable film; forming a burnt film having said first concave portion by burning said solidified film through annealing of said solidified film performed at a second temperature higher than said first temperature; forming a second concave portion connected at least to said first concave portion in said burnt film by forming, on said burnt film, a mask having an opening for forming said second concave portion and etching said burnt film by using said mask; and forming a plug and a metal interconnect made of a metal material by filing said first concave portion and said second concave portion of said burnt film with said metal film, wherein said first concave portion corresponds to an interconnect groove and said second concave portion corresponds to a via hole.