Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1998-09-04
2000-09-05
Jones, Deborah
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
228246, 257720, 257796, 361679, 361704, 361705, 361707, 361708, 361709, 361719, 419 6, 419 7, 419 8, 419 9, 419 10, 419 27, 419 38, 419 66, 428550, 428553, 428555, 428567, 428569, 428577, 428610, 428613, 428618, 428620, 428627, 428634, 428637, 428649, 428650, 428655, 428656, 428686, B22F 700, B22F 326
Patent
active
061140481
ABSTRACT:
The invention provides for a functionally-graded metal substrate that is made of at least two metal compositions, a functional insert and a surrounding body that surrounds the functional insert. In a preferred embodiment of the invention a functional insert powder composition of loose powder metal is placed in a compact of a surrounding body powder composition and both metal compositions are sintered in a sintering furnace to form a sintered part. The sintered part is infiltrated in part or in whole with a molten metal compound to produce a functionally graded metal substrate having a density of at least 90% of theoretical. A heat-generating component such as a chip can be attached to the metal substrate for use in microelectronic packaging. When the functionally-graded metal substrate has two discrete compositions of copper/tungsten the surrounding body which has a CTE that ranges from about 5.6ppm/.degree. C. to about 7 ppm/.degree. C. constrains the expansion of the functional insert which has a thermal conductivity that ranges from about 200 W/mK to about 400 W/mK.
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International Search Report for PCT/US99/20157.
Frazier Jordan P.
Jech David E.
Sepulveda Juan L.
Sworden Richard H.
Brush Wellman Inc.
Jones Deborah
Koehler Robert R.
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