Patent ID: 7253060
Filing Date: 2007-08-07
Classification: H01L

Abstract:
1. A method of fabricating a gate-all-around (GAA) transistor device, comprising: providing a substrate having an active region in the form of a strip extending lengthwise in a first direction between first and second isolation regions; forming an opening in the active region between the first and second isolation regions; forming sidewall spacers within the opening on opposing sidewalls of the active region; forming a sacrificial layer at the bottom of the opening between the sidewall spacers; removing upper portions of the sidewall spacers to expose at least upper portions of the opposing sidewalls of the active region, while leaving residual portions of the sidewall spacers at the bottom of said opening; forming a channel region between the exposed portions of the opposing sidewalls of the active layer and over the sacrificial layer and the residual portions of the sidewall spacers; subsequently removing the sacrificial layer; and subsequently forming a gate insulating layer and a gate electrode within the opening around the channel region.