CPC H01L 23/3672 (2013.01) [B21D 53/02 (2013.01); H01L 21/4878 (2013.01); H01L 21/4882 (2013.01); B23D 53/02 (2013.01); B23P 15/26 (2013.01); F28F 3/02 (2013.01); H05K 7/2039 (2013.01)] | 14 Claims |
8. A method of manufacturing a power module unit, said method comprising:
positioning cooling fins in recesses of a frame, in particular a metal frame;
applying a first metallic material to the cooling fins and the frame by a thermal spraying process, causinq the applied first metallic material to produce milling off a first surface flat after the first metallic material has been applied;
applying a dielectric substrate to the first surface by a thermal spraying process;
applying a second metallic material to the dielectric substrate; and milling off a second surface of the second metallic material flat after applying the second metallic material to the dielectric substrate.
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