Patent ID: 8835320
Filing Date: 2014-09-16
Classification: H01J,H01L

Abstract:
1. An etching method for etching an insulating film formed on a substrate, comprising: first etching of exposing the insulating film to a plasma of a first processing gas to thereby etch the insulating film to a position in a thickness direction, wherein a deposition material is deposited on a surface of the insulating film during the etching, the first processing gas comprising carbon, fluorine, oxygen and hydrogen; deposition material removing of exposing, to an oxygen plasma, the deposition material deposited on the insulating film remaining after completion of the first etching to thereby remove the deposition material on the remaining insulating film; and second etching of exposing the insulating film remaining after completion of the deposition material removing to a plasma of a second processing gas to thereby etch the remaining insulating film, the second processing gas comprising carbon, fluorine, oxygen and hydrogen.