| 摘要 |
<p>A PREFABRICATED COMPOSITE METALLIC HEAT-TRANSMITTING PLATE UNIT A prefabricated composite metallic plate unit for transmitting heat between a heat-absorbing medium having a planar surface such as a heat sink and a body having a planar surface and aubject, during normal operation, to wide temperature excursions and having a predetermined temperature coefficient of expansion, comprises a high-tensile-strength metallic plate member having a temperature coefficient of expansion substantially the same as that of the body and substantially planar opposed surfaces individually in contact with the planar surface of the body and in contact with the heat sink. The heat-transmitting member is adapted to be supported on the heat sink and to support the body therefrom and has a high tensile strength, for example at least 35 kg/mm2. The heat-transmitting member has a plurality of holes uniformly distributed with respect to its planar surfaces, the aggregate area of such holes being less than about 45% of the total areas of such planar surfaces and the total volume thereof being less than about 45% of the volume of said metallic member. The holes in the metallic member are filled with a soft metal of the group comprising silver, copper, aluminum and an alloy of any of these three metals and has a heat-transfer coefficient of at least 0.3 cal./cm2/cm/sec./.degree.C. In a preferred embodiment of the invention, the body to be supported is a semiconductor body and the heat-transmitting member is a nickel-iron or nickel-cobalt-iron alloy having a temperature coefficient of expansion of about 5 x 10-6 cm/cm/.degree.C over a temperature range of about 20.degree.C to 400.degree.c.</p> |
