Power Module
First Claim
1. A power module, which is used in a power converter and mutually converts DC and AC, comprising:
- a power semiconductor module comprising a pair of conductor plates, a semiconductor device disposed between the conductor plates, and a first sealing resin covering side surfaces of the pair of conductor plates, the power semiconductor module being integrated by the first sealing resin;
a metal case comprising a heat dissipation unit on an outer surface thereof and a storage unit storing the power semiconductor module; and
a second sealing resin provided on an outer peripheral side of the first sealing resin of the power semiconductor module stored in the metal case, a side surface of the second sealing resin adhering to an inner surface of the metal case,wherein a rough surface layer for improving adhesiveness with the second sealing resin is provided at least on a region opposing the side surface of the second sealing resin on the inner surface of the metal case, and the second sealing resin fills dents of the rough surface layer.
2 Assignments
0 Petitions
Accused Products
Abstract
Sealing force between a metal case and a power semiconductor module is improved. In a power semiconductor module 3, peripheral side surfaces of power semiconductor devices 31U and 31L and conductor plates 33 to 36 are integrated by being covered with a first sealing resin 6. An oxide layer (rough surface layer) 46 is formed on an inner surface of a metal case 40. A fluid resin material is injected into a space S between the oxide layer 46 provided to the metal case 40 and a power semiconductor module 30, and then a second sealing resin 52 is formed. The second sealing resin 52 fills dents of the oxide layer 46, and therefore sealing force improves.
41 Citations
12 Claims
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1. A power module, which is used in a power converter and mutually converts DC and AC, comprising:
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a power semiconductor module comprising a pair of conductor plates, a semiconductor device disposed between the conductor plates, and a first sealing resin covering side surfaces of the pair of conductor plates, the power semiconductor module being integrated by the first sealing resin; a metal case comprising a heat dissipation unit on an outer surface thereof and a storage unit storing the power semiconductor module; and a second sealing resin provided on an outer peripheral side of the first sealing resin of the power semiconductor module stored in the metal case, a side surface of the second sealing resin adhering to an inner surface of the metal case, wherein a rough surface layer for improving adhesiveness with the second sealing resin is provided at least on a region opposing the side surface of the second sealing resin on the inner surface of the metal case, and the second sealing resin fills dents of the rough surface layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification