Patent ID: 6682979
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A method of forming a pair of transistors associated with a semiconductor substrate, comprising:defining a first region and a second region of the semiconductor substrate; forming a first oxide region which cover at Icast some of the first region of the semiconductor substrate and which does not cover a sub-region comprising at least some of the second region of the semiconductor substrate, forming a nitrogen-comprising layer across at least some of the first oxide region and across at least some of the sub-region of the second region of the semiconductor substrate; after forming the nitrogen-comprising layer, growing a second oxide region from the sub-region of the second region of the semiconductor substrate, the second oxide region comprising a thickness of at least about 70 angstroms; forming a first transistor gate over the first oxide region and a second transistor gate over the second oxide region; forming first source/drain regions proximate the first transistor gate; and forming second source/drain regions proximate the second transistor gate.