Patent ID: 7939403
Filing Date: 2011-05-10
Classification: H01L

Abstract:
1. A method of forming a field effect transistor, comprising: forming trench isolation material within a semiconductor substrate and on opposing sides of a semiconductor material channel region along a length of the channel region, the trench isolation material being formed to comprise upper sidewalls and opposing insulative projections below the upper sidewalls that extend laterally relative to the upper sidewalls toward one another, the insulative projections being received partially elevationally under the channel region along the channel length and with semiconductor material being received elevationally over the projections; etching the trench isolation material to expose opposing sides of the semiconductor material along the channel length; etching the exposed opposing sides of the semiconductor material along the channel length to form a channel fin projecting upwardly relative to the projections; and forming a gate over a top and opposing sides of the fin along the channel length.