Patent ID: 6607954
Filing Date: 2003-08-19
Classification: H01L

Abstract:
A fabrication method for a cylinder-type capacitor in a semiconductor device, the fabrication method comprising:successively forming an etch stop layer and a mold layer on a semiconductor substrate including a cell array area and a peripheral circuit area in which a plug in a buried contact hole is formed in the cell array area; forming a hard mask layer pattern on the mold layer; etching the mold layer and the etch stop layer by using the hard mask layer pattern as an etch mask to form a mold layer pattern and an etch stop layer pattern exposing a surface of the plug; etching back the hard mask layer pattern to reduce a step between the hard mask layer pattern on the cell array area and the hard mask layer pattern on the peripheral circuit area; forming a conductive layer for a capacitor lower electrode along the walls of the buried contact hole and on a surface of the mold layer pattern; forming a sacrificial layer between the buried contact hole and the mold layer pattern; forming a cylinder-type capacitor lower electrode by etching back the conductive layer for the capacitor lower electrode; and removing the mold layer pattern and the sacrificial layer.