Patent ID: 8212649

Claim:
A manufacturing method of a semiconductor device comprising the steps of: forming a first metal wiring layer; forming a first interlayer insulating film on the first metal wiring layer; forming a lower-surface oxidation preventing insulating film on a second interlayer insulating film; forming a metal resistor element film on the lower-surface oxidation preventing insulating film; forming an upper-surface oxidation preventing insulating film on the metal resistor element film; processing a stacked film composed of the lower-surface oxidation preventing insulating film, the metal resistor element film and the upper-surface oxidation preventing insulating film so as to have a desired planar shape of a metal resistor element; depositing a side-surface oxidation preventing insulating film on a whole surface, and then performing anisotropic etching to leave the side-surface oxidation preventing insulating film on a side surface of the stacked film; forming the second interlayer insulating film on the first interlayer insulating film, the side-surface oxidation preventing insulating film and the upper-surface oxidation preventing insulating film; and forming a second metal wiring layer on the second interlayer insulating film.