Patent ID: 6344669
Filing Date: 2002-02-05
Classification: H01L

Abstract:
A complementary metal-oxide-semiconductor image device comprising:a semiconductor substrate of a first conductivity; a first metal-oxide-semiconductor device with a first source terminal, a first drain terminal, and a first gate structure in and on said semiconductor substrate; a second metal-oxide-semiconductor device with a second source terminal, a second drain terminal and a second gate structure in and on said semiconductor substrate, and said second source terminal thereof being adjacent to said first drain terminal of said first metal-oxide-semiconductor device; a first dielectric layer covering all the upper surfaces of said first metal-oxide-semiconductor device, said second metal-oxide-semiconductor device and said semiconductor substrate except the portion of the surface of said first gate structure; a polysilicon layer on said first dielectric layer, and electrically contacting said first gate structure of said first metal-oxide-semiconductor device; an amorphous silicon layer on said polysilicon layer, and wherein near the surface of said polysilicon layer is doped with ions of a second conductivity opposite to said first conductivity and near the upper surface of said amorphous silicon layer is doped with ions of said first conductivity; an electric node on said amorphous silicon layer; a second dielectric layer covering said amorphous silicon layer and said electric node; a via plug structure in a via hole through said second dielectric layer and said via plug structure electrically connecting said electric node; and a contact plug structure in a contact window through said second dielectric layer, said amorphous silicon layer, said polysilicon layer and said first dielectric layer and wherein said contact plug structure electrically connecting said second gate structure of said second metal-oxide-semiconductor device.