Patent ID: 6982198
Filing Date: 2006-01-03
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a trench in a semiconductor substrate or in a layer deposited on the semiconductor substrate; depositing a first conductive layer in the trench; etching a part of the first conductive layer in a relatively upper location in the trench; depositing an electrically conductive and burying-use material having a melting point lower than that of the first conductive layer on a recess that is produced in the top surface of the first conductive layer in the step of etching the first conductive layer; heating the burying-use material to a temperature higher than the melting point thereof and lower than the melting point of the first conductive layer; etching the burying-use material to remove the part thereof from the sidewall of the trench and maintain the part thereof near the recess; and depositing a second conductive layer on the burying-use material in the recess.