Patent ID: 6090701
Filing Date: 2000-07-18
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device having an electrode line formed on a semiconductor substrate, comprising the steps of:forming an insulating layer on said semiconductor substrate;forming at least one of a trench and a contact hole for use in forming a buried electrode line in said insulating layer provided on said semiconductor substrate;depositing a conductive material comprising Cu on said at least one of said trench and said contact hole to form a conductive film;heat-treating said conductive film in an atmosphere with a reduced pressure, the atmosphere including at least an oxygen gas as an oxidizing gas to cause an exothermic reaction so that said conductive film flows and fills said at least one of said trench and said contact hole, a partial pressure of the oxygen gas in said atmosphere being in a range of 1.times.10.sup.-7 to 5.times.10.sup.-5 Torr, which is smaller than an equilibrium partial pressure for oxidation of the conductive film in the process of the heat-treatment; andremoving by polishing the part of said conductive film falling outside said at least one of said trench and contact hole to form said buried electrode line, thereby completing the formation of the electrode line.