Patent ID: 6913995
Filing Date: 2005-07-05
Classification: H01L

Abstract:
1. A method of forming a barrier metal in a semiconductor device, comprising the steps of: a) patterning a porous film on a base layer to form a via hole through the porous film to expose at least part of the base film, the porous film comprising exposed pores on an exposed sidewall surface of the porous film; b) depositing a thin CVD TiN film on the entire structure including the via hole; c) implementing a plasma treatment process using N d) repeatedly implementing the steps (b) and (c) in order to bury only the exposed pores formed on the exposed sidewall surface of the porous film with CVD TiN leaving a remaining exposed sidewall surface of the porous film substantially uncovered by CVD TiN; and e) forming a barrier metal on the entire structure including the via hole.