Patent ID: 7375040

Claim:
A method of manufacturing a semiconductor device, comprising: forming an SiC layer in a reaction chamber, wherein the forming an SiC layer is performed at least in part by flowing only substantially pure trimetholsilane (3MS) into and through the reaction chamber, forming a SiOC etch stop layer on the SiC layer in the reaction chamber with an SiOC formation process comprising: flowing trimetholsilane (3MS) into and through the reaction chamber, flowing CO 2 into and through the reaction chamber, such that the ratio of the flow rate of CO 2 to the flow rate of 3MS is about 3.5 to 1, pressurizing the reaction chamber at a pressure less than about 2 torr, and energizing the reaction chamber with low frequency RF power of at least about 100 watts; and forming a dielectric layer over the SiOC layer.