Patent ID: 7749855
Filing Date: 2010-07-06
Classification: H01L

Abstract:
1. A method of forming a capacitor for use as a charge pump with flash memory, comprising: forming a first polysilicon layer over a semiconductor body; patterning the first polysilicon layer into a polysilicon gate disposed over a core region of the semiconductor body and a first polysilicon capacitor plate disposed over a peripheral region of the semiconductor body; forming a first dielectric layer over the polysilicon gate and the first polysilicon capacitor plate; planarizing the first dielectric layer to expose a top portion of the polysilicon gate and a top portion of the first polysilicon capacitor plate; forming a second dielectric layer over the top portion of the first polysilicon capacitor plate; forming a second polysilicon layer over the top portion of the polysilicon gate and over the second dielectric layer; patterning a portion of the second polysilicon layer over the second dielectric layer to form a second capacitor plate in the periphery region; and electrically connecting the second capacitor plate to the semiconductor body.