Patent ID: 7332395

Claim:
A method of manufacturing a capacitor with a cylindrical lower electrode used in a semiconductor device, comprising the steps of: (1) forming a first insulating film on a semiconductor board with word lines and bit lines formed thereon; (2) providing a conductor plug connected to the board with a surface thereof exposed, in a predetermined position in the first insulating film; (3) depositing a support base material in which the capacitor is to be formed; (4) forming a thin film on a surface of the support base material, patterning the thin film, and forming a deep hole in the support base material using the patterned thin film as a mask; (5) performing processing of cleaning the surface of the conductor plug exposed inside the deep hole, and depositing a material for the lower electrode of the capacitor on an entire surface including the inside of the deep hole; (6) removing the material for the lower electrode formed on the surface of the support base material except the inside of the deep hole; and (7) removing the support base material with the surface thereof exposed by dry etching, wherein the support base material is comprised of an amorphous carbon film formed by CVD.