Semiconductor Device With Self-Aligned Back Side Features
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United States of America Patent
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Nov 1, 2016
filing date -
Aug 6, 2014
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Abstract
Various methods and devices that involve self-aligned features on a semiconductor on insulator process are provided. An exemplary method comprises forming a gate on a semiconductor on insulator wafer. The semiconductor on insulator wafer comprises a device region, a buried insulator, and a substrate. The exemplary method further comprises applying a treatment to the semiconductor on insulator wafer using the gate as a mask. The treatment creates a treated insulator region in the buried insulator. The exemplary method also comprises removing at least a portion of the substrate. The exemplary method also comprises, selectively removing the treated insulator region from the buried insulator to form a remaining insulator region after removing that portion of the substrate.
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