Patent ID: 6387775
Filing Date: 2002-05-14
Classification: H01L

Abstract:
A method for forming an MIM capacitor, comprising the steps;providing a semiconductor structure having an exposed lower metal damascene; forming a capacitor layer over the semiconductor structure and the exposed lower metal damascene; forming an organic etch stop layer upon the capacitor layer; forming an IMD layer upon the organic etch stop layer; patterning the IMD layer using a first etch method highly selective to the IMD layer as compared to the organic etch stop layer, to form an IMD trench exposing a portion of the organic etch stop layer; etching the exposed portion of the organic etch stop layer with a second etch method highly selective to the exposed portion of the organic etch stop layer as compared to the capacitor layer, to expose a portion of the capacitor layer; and forming an upper metal damascene upon the exposed portion of the capacitor layer and within the IMD trench to complete formation of the MIM capacitor.