Transient voltage suppressor and manufacture method thereof
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United States of America Patent
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Mar 6, 2018
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app pub date -
Sep 19, 2016
filing date -
Sep 22, 2015
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Abstract
A transient voltage suppressor can include: a semiconductor substrate; a first buried layer of a first type formed in and on the semiconductor substrate; a second buried layer of a second type formed in a first region of the first buried layer; a first epitaxial region of the second type formed on the second buried layer and a second epitaxial region of the first type formed on a second region of the first buried layer; a first doped region of the first type formed in the first epitaxial region and a second doped region of the second type formed in the second epitaxial region; a conductive channel extending from a surface of the second epitaxial region into the first buried layer; and a first electrode connected to the conductive channel, a second electrode connected to the first doped region, and a third electrode connected to the second doped region.
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