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Thermal design is very important in the systems including high-density heat sources in order to
ensure reliability. Especially, in the case of weight and power limitations, the optimal thermal design is
required. Therefore, we proposed the heat spreader with junction layer by brazing to optimize the
thermal design. The newly proposed heat spreader has improved thermal performance, which makes it
possible to transfer heat from heat source to heat sink with high efficiency.
In this paper, we cover the manufacturing method, the structural charateristics and thermal
characteristics of the heat spreader. We also verify the heat transfer characteristics with the thermal
analysis and experiments.
As a result, new heat spreader has about four times larger thermal conductivity than that of
aluminum heat spreader.