Patent ID: 8502388

Claim:
A semiconductor device, comprising: an insulating film formed on a substrate; interconnects each formed in an interconnect groove provided in the insulating film; and a via formed in a via hole provided under the interconnect groove in the insulating film, the via being electrically connected to the interconnect, wherein the insulating film has a low-porosity region low in porosity and a high-porosity region high in porosity, the low-porosity region is formed in a portion under the interconnect groove and disposed between the via and the high-porosity region, the high-porosity region is formed in a portion neighboring a sidewall of the interconnect groove, a diameter of pores present in the low-porosity region is less than 0.8 nm, and a diameter of pores present in the high-porosity region is 0.8 nm or more and less than 3.0 nm.