Patent ID: 6030450
Filing Date: 2000-02-29
Classification: C30B

Abstract:
A method of fabricating a single crystal silicon by a Czochralski (CZ) technique, comprising the steps of:forming a neck portion;forming a shoulder portion;forming a body portion by pulling from a melt of raw material in a crucible while heating the crucible by a main heater, successively while cooling the pulled single crystal; andpulling the single crystal silicon while the heater is kept in operation after cutting the rear end of the single crystal silicon off from the melt so as to terminate forming of the single crystal siliconwherein a portion near the rear part of a single-crystal body passes through a defect-forming temperature zone at a rear cooling speed and a front portion passing through the defect forming temperature zone at a front cooling speed and the front cooling speed and the rear cooling speed are same.