Power module with isolated substrates cooled by integral heat-energy-removal means
First Claim
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1. A cooled semiconductor power module comprising:
- a thermosiphon including a hollow block of heat-conductive material with a coolant fluid contained therein and further including an external surface from which heat energy applied thereto is conducted to vaporize a portion of said coolant fluid;
a substrate of heat-conductive, electrically-insulative material including first and second opposed surfaces, said first surface being bonded to said external surface, andat least one semiconductor device including at least two electrodes, at least one of said electrodes being bonded to said second surface of said substrate.
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Abstract
The evaporating area of a heat pipe or thermosiphon evaporator is used as the thermal sink for one face of an electrically isolated substrate upon the opposite face of which are mounted and interconnected one or more power semiconductors and other components requiring cooling. Both sides of semiconductor devices mounted on the isolating substrate may be cooled while allowing each of a plurality of different combinations of electrical devices and/or interconnections to be achieved.
67 Citations
12 Claims
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1. A cooled semiconductor power module comprising:
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a thermosiphon including a hollow block of heat-conductive material with a coolant fluid contained therein and further including an external surface from which heat energy applied thereto is conducted to vaporize a portion of said coolant fluid; a substrate of heat-conductive, electrically-insulative material including first and second opposed surfaces, said first surface being bonded to said external surface, and at least one semiconductor device including at least two electrodes, at least one of said electrodes being bonded to said second surface of said substrate. - View Dependent Claims (2, 3, 4)
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5. A cooled semiconductor power module comprising:
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a thermosiphon including a hollow block of heat-conductive material with a coolant fluid contained therein and further including an external surface from which heat energy applied thereto is conducted to vaporize a portion of said coolant fluid; a substrate of heat-conductive, electrically-insulative material including first and second opposed surfaces, said first surface being bonded to said external surface; a plurality of mounting pads of highly thermally conductive material situated on the second surface of said substrate and bonded thereto; a plurality of semiconductor devices, each including at least two electrodes, one electrode of each of said semiconductor devices being bonded to a respective separate mounting pad, and a plurality of lead means, each of said lead means being bonded to each of the remaining electrodes, respectively, and further bonded to a selected one of a group consisting of the remaining mounting pads and the remaining electrodes. - View Dependent Claims (6, 7, 8)
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9. A cooled semiconductor power module comprising:
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first and second thermosiphons each including a hollow block of heat-conductive material with a coolant fluid contained therein, and further respectively including first and second external surfaces from which heat energy applied thereto is conducted to vaporize a portion of the coolant fluid in each of said first and second thermosiphons; first and second substrates of heat-conductive, electrically-insulative material, each of said first and second substrates including first and second opposed surfaces, the first surface of said first substrate and the first surface of said second substrate being respectively bonded to said first and second external surfaces; at least one electrically-conductive mounting pad situated on each of the second surfaces of said first and second substrates, each mounting pad on the second surface of said first substrate having a corresponding mounting pad on the second surface of said second substrate; and at least one semiconductor device having opposed surfaces with electrodes situated on the surfaces of said semiconductor device, said semiconductor device situated between said corresponding conductive mounting pads and operatively attached thereto. - View Dependent Claims (10, 11, 12)
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Specification