Patent ID: 6277715
Filing Date: 2001-08-21
Classification: H01L

Abstract:
A production method for a semiconductor device comprising the steps of:prior to an epitaxial growth process, performing a heat treatment at a temperature within .+-.50.degree. C. of a holding temperature for a first stage heat treatment which is to be firstly effected as a heat treatment in a device fabrication process after the epitaxial growth process for a time period equal to or more than a time period in which a precipitate nucleus of interstitial oxygen in a silicon wafer can grow to a precipitate size which survives through the epitaxial growth process;forming silicon single crystal on the silicon wafer in the epitaxial growth process after the heat treatment to produce a silicon epitaxial wafer; andputting the silicon epitaxial wafer into the semiconductor device fabrication process in which a plurality of heat treatments including the first stage heat treatment is performed.