Patent ID: 7671473

Claim:
A semiconductor device, comprising a first insulation layer, a first conductor layer formed in the first insulation layer, an etching stopper layer formed on the first insulation layer and the first conductor layer, a second insulation layer formed on the etching stopper layer, the second insulation layer having a first via hole and a first trench formed therein, wherein a bottom of the first via hole exposes an upper surface of the first conductor layer and a top of the first via hole connects to a bottom of the first trench, a second conductor layer formed in the first via hole and the first trench, a third insulation layer formed on the second insulation layer, and a cap layer formed on the second conductor layer and the third insulation layer; wherein, the third insulation layer connects to the second insulation layer and the cap layer, wherein each of the second insulation layer and the third insulation layer independently comprises a borazine based compound, and wherein the third insulation layer has a smaller carbon content than the second insulation layer.