Patent ID: 6500763
Filing Date: 2002-12-31
Classification: H01L

Abstract:
A method for manufacturing an electrode of a capacitor, the method comprising:forming, on a semiconductor substrate, a lower insulating layer surrounding a conductive plug, wherein the conductive plug is electrically connected to the semiconductor substrate; forming a support insulating layer on the lower insulating layer; forming an etch stop layer including a tantalum oxide layer on the support insulating layer; forming a mold sacrificial insulating layer on the etch stop layer; forming a mold exposing the conductive plug by sequentially patterning the mold sacrificial insulating layer, the etch stop layer and the support insulating layer; forming, on the mold exposing the conductive plug, a storage node layer covering over the inner surface of the mold exposing the conductive plug such that the storage node layer is electrically connected to the conductive plug; forming a storage node by separating the storage node layer; and selectively etching and removing the residual mold sacrificial insulating layer that is exposed by the separation of the storage node layer, using the etch stop layer to stop the etching process.