Patent ID: 6731386
Filing Date: 2004-05-04
Classification: G01B

Abstract:
A method of measuring the thickness (&dgr;) of an ultra-thin oxide grown on a surface of a semiconductor device, the method comprising the steps of:a) providing a reference sample device including a top major surface; b) forming a relatively thick reference oxide on the top major surface of said reference sample device; c) measuring the thickness (t) of said relatively thick reference oxide; d) providing a semiconductor device; e) simultaneously forming, on both said semiconductor device and said reference sample, an ultra-thin oxide layer, using identical formation conditions; f) measuring the total thickness (T) of both said relatively thick reference oxide and the ultra-thin oxide layers on said reference sample; and g) subtracting the initial thickness (t) of said relatively thick reference oxide from said total thickness (T) to determine the thickness (&dgr;) of the ultra-thin oxide layer formed on the semiconductor device.