Patent ID: 8669183
Filing Date: 2014-03-11
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: providing a semiconductor substrate comprising a first surface, a second surface opposite from the first surface, an insulation film formed on the first surface and a pad electrode disposed on the insulation film; forming a mask layer on the second surface so that an opening is formed in the mask layer at a location corresponding to the pad electrode; providing an apparatus configured to perform a Bosch process, which comprises a plasma etching to etch the substrate and a plasma deposition to deposit a protection film that are alternated; forming a via hole in the substrate using the mask layer so as to expose the insulation film by performing the Bosch process using the apparatus, a sidewall of the formed via hole having scallops formed by the Bosch process; and reducing the scallops formed by the Bosch process on the sidewall of the via hole after the formation of the via hole.