Patent ID: 6121101
Filing Date: 2000-09-19
Classification: H01L

Abstract:
A process for device fabrication comprising:forming a first layer of a first material onto a silicon substrate, wherein the first layer has a thickness of less than about 10 nm;forming a second layer of a second material over the first layer;forming a window in the second layer of material which terminates at the first layer;removing the portion of the first layer of material at the base of the window, and at least a portion of the first layer underlying the second layer thereby forming a gap between the second layer and the underlying substrate wherein the gap has a proximate end and a distal end wherein the proximate end is the end of the gap adjacent the window and the distal end is the end of the gap adjacent the remaining portion of the first layer and wherein the gap has a height which is defined as the distance between the overlying second layer and the underlying substrate;subjecting the gap to conditions that cause the gap height to be at least ten percent greater at the proximate end of the gap than at the distal end of the gap; andrefilling the gap with a material by chemical vapor deposition.