SENSOR ELEMENT AND GAS SENSOR
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United States of America Patent
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Issued Date -
Aug 4, 2022
app pub date -
Sep 28, 2020
filing date -
Feb 17, 2020
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Abstract
A sensor element comprising a first electrode containing Au as a main component, a second electrode and a solid electrolyte body. The first electrode and the second electrode are disposed to face each other while sandwiching the solid electrolyte body therebetween. The first electrode has a first electrode portion, which faces the second electrode while sandwiching the solid electrolyte body in cooperation with the second electrode, and a first lead portion. The solid electrolyte body has an uneven portion in a surface region facing the first electrode portion, the uneven portion having a plurality of protrusions. The first electrode portion is in direct contact with the uneven portion. An insulating layer whose surface has an uneven shape is formed on a surface of the solid electrolyte body facing the first lead portion. The first lead portion is in direct contact with the insulating layer.
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