Patent ID: 6352931
Filing Date: 2002-03-05
Classification: H01L

Abstract:
A manufacturing method of semiconductor devices by using dry etching technology, comprising:forming an organic silicon film on a semiconductor substrate; dry etching the organic silicon film to form a portion which is predetermined to be constituted by an insulating film of the semiconductor device by using the organic silicon film; and changing the organic silicon film into an insulating film so that the portion of the semiconductor device constituted by the insulating film is formed, wherein the portion of the semiconductor device constituted by the insulating film is an interlayer insulating film subjected to first trench formation for forming a first trench metallization, second trench formation for forming a second trench metallization and formation of a contact hole for connecting the first and second trench metallizations to each other, and steps of forming the interlayer insulating film include: forming the contact hole in a first insulating film on the semiconductor substrate, coating the overall upper surface of the first insulating film with the organic silicon film such that the contact hole is buried, removing a portion for the second trench formation including an opening portion of the contact hole and the organic silicon film in the contact hole by selectively dry etching the organic film, and changing the organic silicon film subjected to the removing step into a second insulating film constituted by any one of an organic silicon oxide film, an inorganic silicon oxide film, a silicon oxide film, a silicon nitride film and a silicon oxynitride film.