Method and structure to fabricate closely packed hybrid nanowires at scaled pitch
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United States of America Patent
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Jan 9, 2018
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app pub date -
Oct 28, 2016
filing date -
Sep 10, 2015
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Abstract
Techniques for forming closely packed hybrid nanowires are provided. In one aspect, a method for forming hybrid nanowires includes: forming alternating layers of a first and a second material in a stack on a substrate; forming a first trench(es) and a second trench(es) in the stack; laterally etching the layer of the second material selectively within the first trench(es) to form first cavities in the layer; growing a first epitaxial material within the first trench(es) filling the first cavities; laterally etching the layer of the second material selectively within the second trench(es) to form second cavities in the layer; growing a second epitaxial material within the second trench(es) filling the second cavities, wherein the first epitaxial material in the first cavities and the second epitaxial material in the second cavities are the hybrid nanowires. A nanowire FET device and method for formation thereof are also provided.
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