Patent ID: 6869542
Filing Date: 2005-03-22
Classification: H01L

Abstract:
1. A method of forming a hole in a dielectric layer formed on a substrate comprising: covering the dielectric layer with a deposit of an inorganic hard mask layer composed of an etch resistant material selected from the group consisting of RCH and RCHX, wherein R is selected from the group consisting of silicon (Si), germanium (Ge), boron (B), tin (Sn), iron (Fe), titanium (Ti) and combinations thereof, C is carbon, H is hydrogen, and X is selected form the group consisting of oxygen (O), nitrogen (N), sulfur (S), and fluorine (F), forming a resist mask with at least one resist mask window therethrough over the inorganic hard mask layer, placing the substrate covered with the dielectric layer, the inorganic hard mask and the resist mask in a fluorocarbon etching chamber while applying a DC bias in the fluorocarbon etching chamber and then performing the steps as follows: