Semiconductor device having multiple wiring layers and method of producing the same

摘要

A method of producing a semiconductor device having a plurality of wiring layers forms a first interlayer-insulating film, forms a plurality of grooves for wiring in the first interlayer-insulating film, fills metallic films in the grooves to form wirings, etches the first interlayer-insulating film with the wirings as a mask and removes the interlayer-insulating film between the wirings to provide grooves to be filled, and fills a second interlayer-insulating film made of a material of low dielectric constant in the grooves to be filled.