Surge absorbing element
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United States of America Patent
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Mar 19, 2013
Grant Date -
Dec 15, 2011
app pub date -
Apr 13, 2010
filing date -
Apr 23, 2009
priority date (Note) -
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Abstract
A surge absorbing element has a first electrode, a second electrode, and a ceramic layer. The second electrode is opposed to the first electrode. The ceramic layer has a polycrystal structure including a plurality of crystal grains showing voltage nonlinearity, and is at least partially brought into contact with the first electrode and the second electrode. The ceramic layer has a void inside therein, and surface discharge is generated on surfaces, exposed to the void, of the crystal grains, whereby electric conduction is attained between the first and second electrodes.
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