Heat spreader and method of making the same

Details Heat spreader and method of making the same Heat spreader and method of making the same

1999-02-09

2000-10-10

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Laterally noncoextensive components

428635, 428664, 428676, 228190, 257720, 361709, H01L 23373, B32B 324

Patent

active

061299936

ABSTRACT:
Provided are a heat spreader that can reduce an increase in the thermal expansion coefficient up to high temperatures of not lower than 500.degree. C. and has an excellent thermal expansion property and an adequate heat-conductive property and a method of making the same. This heat spreader comprises high-thermal-conductivity layers made of a Cu-base metal, low-thermal-expansion layers made of an Fe--Ni-base alloy each of which layers is provided with a plurality of through holes, and thermal expansion-restraining layers of a metal with a thermal expansion coefficient .alpha. at 30-800.degree. C. of not more than 7.5.times.10.sup.-6 /.degree. C.

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