| 摘要 |
PURPOSE:To obtain a heat conductive surface of high heat conductivity by a method wherein the surface of a heat conductive substrate is made to have convex and concave portions and particles are piled up thereon, and fixed to the concave portion so that a porous layer is produced on the surface of the heat conductive substrate. CONSTITUTION:The surface 2 of the heat conductive substrate is made to have convex and concave portions. The particles 7 are piled up on the concave portion 9 and the surface 2 of the heat conductive substrate having the particles thereon is immersed in a plating liquid so that a metallic film 8 is formed over the surface 2 with the result that the particles 7 are fixed to the concave portion 9 to produce the porous layer 3 which acts as the heat transfer surface 4. Thus, it is possible to form on a heat coductive substrate a porous layer of a desired configuration which acts as a heat conductive surface of high heat conductivity.
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