Miniature reference electrode
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United States of America Patent
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-
Jul 16, 2002
Grant Date -
N/A
app pub date -
Mar 24, 2000
filing date -
Jun 24, 1999
priority date (Note) -
Expired
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Abstract
A miniature reference electrode with improved stability and durability formed of a miniature silver/silver chloride reference electrode with high stability and general applicability as a reference electrode. The miniature reference electrode includes, on electrode substrate, a thin-film backbone metal pattern and a thin-film silver pattern formed in electrical contact with a portion of the thin-film backbone metal pattern. A silver chloride layer is set on a portion of the thin-film silver pattern. The silver chloride layer is in contact with a portion of thin-film electrolyte layer via hydrophobic thin-film insulating layer. The thin-film electrolyte layer is impregnated with a saturated solution of potassium chloride for making contact to the outside via a thin-film liquid junction pattern. When in use, the thin-film liquid junction pattern (31) is impregnated with the electrolyte, while its end portion is recessed in an aqueous solution.
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