Patent ID: 8232146

Claim:
A method of manufacturing a semiconductor device having resistors and fuse elements and including a bleeder resistance circuit which can, by cutting one of the fuse elements connected in parallel with one of the resistors, adjust voltage output divided by the resistors, the method comprising the steps of: forming a trench in a semiconductor substrate; forming a field insulating film on the semiconductor substrate having the trench formed therein; forming a first polycrystalline silicon film on the field insulating film; patterning the first polycrystalline silicon film; depositing a first oxide film and planarizing a surface of the first polycrystalline silicon film by the first oxide film using an etch-back method; forming a second polycrystalline silicon film wherein at least a portion of the second polycrystalline silicon film is limited on the first polycrystalline silicon film; patterning the second polycrystalline silicon film; forming an interlayer film on the second polycrystalline silicon film; forming a plug in a region where the first polycrystalline silicon film and the second polycrystalline silicon film are laminated so that the plug pierces the interlayer film and the second polycrystalline silicon film to reach the first polycrystalline silicon film; forming a conductor as a interconnect layer on the plug; forming a passivation film on the interconnect layer; forming a polyimide film on the passivation film; and patterning the passivation film and the polyimide film.