Integrated circuits using silicon on insulator substrates and methods of manufacturing the same
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United States of America Patent
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Mar 20, 2018
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app pub date -
Mar 19, 2015
filing date -
Mar 19, 2015
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Abstract
Integrated circuits and methods for manufacturing the same are provided. A method for producing an integrated circuit includes forming a deep isolation block in an SOI substrate, where the SOI substrate includes a substrate layer overlying a buried insulator that in turn overlies a carrier wafer. The deep isolation block extends through the substrate layer and contacts the buried insulator. A shallow isolation block is formed in the substrate layer, where the shallow isolation block overlies a portion of the substrate layer. An isolation mask is formed overlying at least a portion of the deep isolation block to form a masked isolation block and an exposed isolation block, where the exposed isolation block includes the shallow isolation block. The exposed isolation block is removed such that a trough is defined in the substrate layer where the shallow isolation block was removed, and a gate is formed within the trough.
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