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Frequency shifted, vacuum pressure sensor

United States Patent

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10,317,300
June 11, 2019
View the Complete Patent at the US Patent & Trademark Office
Described herein is an apparatus that includes a varactor and an inductor to form a resonant circuit that oscillates at a resonant frequency. The resonant frequency is a function of a pressure of a gas within an aperture of the varactor. In some embodiment, the varactor includes a first layer of p-type material, a first layer of n-type material, and a first np junction formed between the layer of p-type material and the layer of n-type material. The aperture extends at least partially through the layer of p-type material, at least partially through the layer of n-type material, and entirely through the np junction.
15/ 281,909
September 30, 2016
1/1
G01L 9/12 (20060101)G01L 9/00 (20060101)H01L 29/93 (20060101)
STATEMENT OF GOVERNMENTAL INTEREST This invention was developed under Contract DE-AC04-94AL85000 between Sandia Corporation and the U.S. Department of Energy. The U.S. Government has certain rights in this invention.