Patent ID: 6924229
Filing Date: 2005-08-02
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, comprising the steps of: (a) forming a lower insulating layer comprising a landing plug on a semiconductor substrate; (b) forming an interlayer insulating film on the entire surface of the resulting structure; (c) forming a bit line on the interlayer insulating film, wherein the bit line has a hard mask layer thereon and a nitride spacer on a sidewall thereof; (d) forming a storage electrode contact hole through the interlayer insulating film to expose an upper portion of the landing plug; (e) forming a first nitride film on the entire surface of the resulting structure; (f) forming a second nitride film on the entire surface of the resulting structure, wherein the thickness of the second nitride film disposed at the bottom and on the inner walls of the storage electrode contact hole are smaller than that of the second nitride film on an upper portion of the hard mask layer; and (g) etching the second nitride film and the first nitride film to expose the landing plug.