Patent ID: 8912100

Claim:
A manufacturing method of a complementary metal oxide semiconductor, comprising steps of: (a) providing a semiconductor substrate; (b) forming a metal oxide semiconductor region having an oxide layer on a first surface of the semiconductor substrate, wherein said oxide layer has a thickness greater than 1 micrometer; (c) forming said oxide layer as an isolation region of said metal oxide semiconductor region and a heat-isolation region of a poly heater; (d) forming a poly gate of said metal oxide semiconductor region as at least a portion of said poly heater; (e) forming an interlayer dielectric layer; and (f) processing a selenium etching, wherein said step (f) further comprises steps of: (f1) opening said poly heater through selenium etching process; and (f2) opening a metal region or a poly region for fusing said metal region and said poly region through selenium etching process.