Patent ID: 6951809
Filing Date: 2005-10-04
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: a first step of forming an insulating film including a contact hole on a substrate; a second step of forming a conductive underlying layer on the insulating film inclusive of the sidewall surface and the bottom surface of the contact hole; a third step of subjecting the underlying layer to sputter-etching so that a part of the underlying layer deposited on the bottom surface of the contact hole is at least partially deposited on the lower part of the sidewall surface of the contact hole; and a fourth step of forming a metal layer on the underlying layer by plating, wherein in the third step, a film thickness of the underlying layer deposited on the lower part of the sidewall surface of the contact hole increases while a part of the underlying layer remains on the bottom surface of the contact hole.