Methods for forming hybrid vertical transistors
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United States of America Patent
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Jan 2, 2018
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N/A
app pub date -
Jun 9, 2016
filing date -
Jun 9, 2016
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Abstract
A method for forming a hybrid semiconductor device includes growing a stack of layers on a semiconductor substrate. The stack of layers includes a bottom layer in contact with the substrate, a middle layer on the bottom layer and a top layer on the middle layer. First and second transistors are formed on the top layer. A protective dielectric is deposited over the first and second transistors. A trench is formed adjacent to the first transistors to expose the middle layer. The middle layer is removed from below the first transistors to form a cavity. A dielectric material is deposited in the cavity to provide a transistor on insulator structure for the first transistors and a bulk substrate structure for the second transistors.
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