Patent ID: 7534721

Claim:
A process for production of a semiconductor device having interlayer insulating films including an organic insulating film, said process comprising: (a) a step of sequentially forming on a semiconductor substrate a first insulating film as an insulating film for penetrating a connecting hole, and a second insulating film as an interlayer insulating film for forming a wiring groove, (b) a step of sequentially forming on the second insulating film a first mask forming layer, a second mask forming layer, and a third mask forming layer, which are to be made into a first mask, a second mask, and a third mask, respectively, (c) a step of patterning the third mask forming layer, thereby forming the third mask having a wiring groove pattern, (d) a step of forming on the second mask forming layer including the third mask a resist mask having a connecting hole pattern, (e) a step of etching the third mask, the second mask forming layer, and the first mask forming layer through the resist mask, and etching further the second insulating film, thereby making the connecting hole, (f) a step of etching the second mask forming layer through the third mask, thereby forming the second mask having the wiring groove pattern and making the connecting hole to the middle of the first insulating film, (g) a step of etching the first mask forming layer through the second mask, thereby forming the first mask having the wiring groove pattern, and etching the first insulating film remaining at the bottom of the connecting hole, thereby making the connecting hole, (h) a step of etching the second insulating film through the first or second mask, thereby forming the wiring groove in the second insulating film, and (i) a step of removing at least the second and third masks.