Patent ID: 6709931
Filing Date: 2004-03-23
Classification: H01L,Y10S

Abstract:
A method of fabricating a semiconductor device, the method comprising:providing a semiconductor substrate having first and second regions; forming a device isolation layer at a predetermined region of the semiconductor substrate to define first and second active regions in the first and second regions, respectively; forming a capping layer on an entire surface of the substrate having the device isolation layer; patterning the capping layer to form a capping layer pattern that exposes the second active region and covers the first region; forming a first gate oxide layer on an entire surface of the substrate including the capping layer pattern, the first gate oxide layer being formed using a chemical vapor deposition technique; successively etching the first gate oxide layer in the first region and the capping layer pattern to expose the first active region; and thermally oxidizing the resultant structure to form a second gate oxide layer on the first active region, the second gate oxide layer being formed to a thickness which is thinner than the first gate oxide layer.