Patent ID: RE40748

Claim:
A process for producing a semiconductor device comprising an inter level dielectric comprising a xerogel film or an organic film, said process comprising a step of forming on said inter level dielectric, a first light transmissible mask to be an etching mask for etching said inter level dielectric; a step of forming, on said first mask, a second light transmissible mask comprising a different material from said first mask to be an etching mask for etching said inter level dielectric , said second light transmissible mask being formed with a silicon nitride ; a step of forming, on said second light transmissible mask, a first resist film that is used as a mask for etching said second light transmissible film; removing said first resist film; a step of forming, on said first and second light transmissible masks, a second resist film for etching said first light transmissible mask, and first and second levels of said inter level dielectric ; and removing said second resist film.