Patent ID: 10804145

Abstract:
A method of fabricating a semiconductor device is provided. The method may include forming a first interlayer insulating film on a substrate, forming a second interlayer insulating film on the first interlayer insulating film, and forming a third interlayer insulating film on the second interlayer insulating film. Different amounts of carbon may be present in each of the first, second, and third interlayer insulating films. The third interlayer insulating film may be used as a mask pattern to form a via trench that extends at least partially into the first interlayer insulating film and the second interlayer insulating film. Supplying a carbon precursor may be interrupted between the forming of the second and third interlayer insulating films, such that the second interlayer insulating film and the third interlayer insulating film may have a discontinuous boundary therebetween.