Patent ID: 6838370
Filing Date: 2005-01-04
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: making a first concavity in a first insulating film of the device; covering an inside surface of the first concavity and an upper surface of the first insulating film with a first barrier layer for preventing metal diffusion; buying the first concavity covered with the first barrier layer with a wiring metal; polishing the device to remove a part of the wiring metal residing higher than a level of the upper surface of the first insulating film so as to leave a first metal layer in the first concavity; applying a solution of an organic substance to the device so as to form a protective film of the organic substance on a surface of the first metal layer for preventing metal diffusion; forming a second insulating film on the surface of the device, the second insulating film contacting the upper surface of the first insulating film from which the first barrier layer is removed, the second insulating film contacting the protective film, making a second concavity simultaneously in the second insulating film and the protective film in a region above the first metal layer; covering the inside surface of the second concavity and the upper surface of the second insulating film with a second barrier layer; and burying the second concavity covered with the second barrier layer with a second wiring metal layer, the second wiring metal layer contacting the first metal layer.