Patent ID: 8105949
Filing Date: 2012-01-31
Classification: H01L

Abstract:
1. A substrate processing method that processes a substrate in which a to-be-processed layer, an intermediate layer, and a mask layer are stacked in this order, and in which the mask layer has an opening to which part of the intermediate layer is exposed, comprising: performing a shrinking etching by carrying out the following steps in one step: etching a to-be-processed layer by transferring the opening in the intermediate layer corresponding to the opening in the mask layer reduced in opening width in said shrinking etching step onto the to-be-processed layer using plasma produced from a non-deposition gas, wherein the anisotropic etching gas is a gas that has a higher molecular weight than the deposition gas and contains a halogen element of a higher atomic number than bromine (Br), or sulfur (S) or an element of a higher atomic number than sulfur (S) in the 16th group of the periodic system.