| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prolong the heat cycle life of a ceramic board with a heat sink and, in addition, to satisfactorily maintain the heat radiating characteristic of the heat sink. <P>SOLUTION: First and second aluminum alloy plates 21 and 22 are respectively laminated on and bonded to the both surfaces of a ceramic substrate 13 through first and second Al-based brazing material layers 11 and 12, and a heat sink 45 is laminated upon and bonded to the first or the second aluminum alloy plate 21 or 22. The heat sink 45 is constituted of a copper alloy plate 16, a silica coating layer 46 formed on one surface of the plate 16, and a third aluminum alloy plate 54 laminated upon and bonded to the coating layer 46 through a third brazing material layer 43. The third aluminum alloy plate 54 is directly laminated on and bonded to the first or the second aluminum alloy plate 21 or 22 through a fourth brazing material layer 44. <P>COPYRIGHT: (C)2004,JPO</p> |
