Patent ID: 8802512
Filing Date: 2014-08-12
Classification: B82Y,H01L

Abstract:
1. A method for fabricating a nanowire, comprising: etching exposed portions of a substrate to provide an unetched raised portion, the substrate having a first set of structures formed thereon and a dummy structure formed over at least a portions of the substrate and the first set of structures; forming first spacers about a periphery of the dummy structure and the unetched raised portion; etching the substrate to form controlled undercut etched portions around a portion of the substrate below the dummy structure; forming second spacers in the controlled undercut etched portions; removing the dummy structure; etching the substrate to release the first set of structures; and forming gate structures including a top gate formed above the first set of structures and a bottom gate formed below the first set of structures such that the second spacers are employed to align edges of the bottom gate to the top gate.