Patent ID: 6528385
Filing Date: 2003-03-04
Classification: H01L

Abstract:
A method for the fabrication of capacitor, comprising:(a) forming an insulating film on a semiconductor substrate, the semiconductor substrate having a cell region and a peripheral circuit region; (b) selectively etching the insulating film to form electrode openings, the electrode openings having a bottom and sidewalls; (c) disposing a conductive layer on a surface of the semiconductor substrate, the sidewalls of the electrode openings, and the bottom of the electrode openings; (d) forming a photoresist etch mask that covers a portion of the conductive layer in the cell region and exposes a portion of the conductive layer in the peripheral circuit region; (e) removing the exposed portion of the conductive layer from the peripheral circuit region; (f) etching the photoresist etch mask using an etchback process to expose a surface of the conductive layer formed on the surface of the substrate in the cell region; (g) etching the exposed surface of the conductive layer in the cell region using an etchback process to remove the conductive layer from the surface of the substrate, to separate a portion of the conductive layer remaining on the sidewalls and bottom of each electrode opening, and to form a distinct bottom electrode in each electrode opening; and (h) removing a residual portion of the photoresist etch mask from the electrode holes.