Patent ID: 7402483
Filing Date: 2008-07-22
Classification: H01L

Abstract:
1. A method of forming a multi-bridge-channel metal oxide semiconductor field effect transistor (MOSFET), comprising: forming a stacked structure on a substrate, the stacked structure comprising channel layers and interchannel layers interposed between the channel layers; forming trenches by selectively etching the stacked structure, the trenches running across the stacked structure parallel to each other and separating a first stacked portion comprising channel patterns and interchannel patterns from second stacked portions comprising channel layers and interchannel layers remaining on both sides of the first stacked portion; growing first source and drain regions using selective epitaxial growth, the first source and drain regions filling the trenches and being connected to second source and drain regions defined by the second stacked portions; selectively exposing marginal sections of the interchannel patterns of the first stacked portion; forming through tunnels by selectively removing the interchannel patterns of the first stacked portion beginning with the exposed marginal sections, the through tunnels being surrounded by the first source and drain regions and the channel patterns; and forming a gate along with a gate dielectric layer, the gate filling the through tunnels and extending onto the first stacked portion.