Sulfuration resistant chip resistor and method for making same
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United States of America Patent
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Feb 17, 2015
Grant Date -
Dec 19, 2013
app pub date -
Aug 19, 2013
filing date -
Mar 1, 2007
priority date (Note) -
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Abstract
A chip resistor includes an insulating substrate, top terminal electrodes formed on top surface of the substrate using silver-based cermet, bottom electrodes, resistive element that is situated between the top terminal electrodes and overlaps them partially, an optional internal protective coating that covers resistive element completely or partially, an external protective coating that covers completely the internal protection coating and partially covers top terminal electrodes, a plated layer of nickel that covers face sides of the substrate, top and bottom electrodes, and overlaps partially external protective coating, finishing plated layer that covers nickel layer. The overlap of nickel layer and external protective layer possesses a sealing property because of metallization of the edges of external protective layer prior to the nickel plating process.
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