Patent ID: 7056803
Filing Date: 2006-06-06
Classification: H01L

Abstract:
1. A method for forming a capacitor of a semiconductor device, comprising the steps of: (a) forming a nitride film for storage electrode on a semiconductor substrate; (b) forming an oxide film for storage electrode on the nitride film, wherein the oxide film for storage electrode is selected from a group consisting of a PE-TEOS (plasma enhanced tetraethyl ortho silicate) oxide film, an O (c) selectively etching the oxide film and the nitride film to define a storage electrode region; (d) forming a conductive layer for storage electrode on the semiconductor substrate including the storage electrode region; (e) forming a gap-filling nitride film on the semiconductor substrate to fill up the storage electrode region; (f) performing a CMP process using the oxide film as a polishing stop layer to form a storage electrode, wherein the CMP process is performed using a slurry comprising 0.5˜10 wt % of an abrasive having a particle size ranging from 50 to 500 nm, 0.01˜30 wt % of NaH (g) removing the gap-filling nitride film.