Ceramic circuit board and method of making the same
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United States of America Patent
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Sep 1, 2015
Grant Date -
Sep 5, 2013
app pub date -
Apr 12, 2013
filing date -
May 15, 2009
priority date (Note) -
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Abstract
A ceramic circuit board for use in packaging an electronic element includes a ceramic-copper plate, and a heat-dissipating unit that is adapted for dissipating heat from the electronic element. The ceramic-copperplate includes a ceramic substrate that has opposite first and second surfaces, and a through-hole formed through the first and second surfaces, a top copper pattern that overlies the first surface of the ceramic substrate and that has at least two conducting portions spaced apart from each other, and a bottom copper layer that underlies the second surface of the ceramic substrate. The heat-dissipating unit includes a heat-dissipating layer that is disposed in the through-hole of the ceramic substrate above the bottom copper layer and that has a thermal conductivity larger than that of the ceramic substrate. A method of making the ceramic circuit board is also disclosed.
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