Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1977-06-09
1979-06-19
Hunt, Brooks H.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
75200, 75208R, B22F 300
Patent
active
041587197
ABSTRACT:
A compacted article having low thermal expansivity and high thermal conductivity is made by compacting a mixture of two metal powders, one of which has low thermal expansivity and the other of which has high thermal conductivity, and strip material made therefrom which is suitable for use in forming the supportive lead frames in integrated circuit components. The powders are mixed together, formed into a green preform, sintered, and rolled to size to produce compacted or densified strip which has a unique combination of low thermal expansivity and high thermal conductivity. A low-expansivity metal disclosed in an alloy containing about 45-70% iron, 20-55% nickel, up to 25% cobalt, and up to 5% chromium which in powder form is mixed with a high-conductivity metal powder disclosed as substantially elemental iron, copper or nickel.
REFERENCES:
patent: 3120436 (1964-02-01), Harrison
patent: 3652261 (1972-03-01), Taubenblat
patent: 3853551 (1974-12-01), Esper et al.
patent: 4032301 (1977-06-01), Hassler et al.
Goetzel, Treats on Powder Metallurgy, vol. 1, 1949, p. 6.
Carpenter Technology Corporation
Hunt Brooks H.
Jay Edgar N.
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