Integral extended surface cooling of power modules
First Claim
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1. A power module cooling system comprising:
- a cold plate comprising a fluid inlet and a fluid outlet, a channel interconnecting said fluid inlet and said fluid outlet, and a mounting face having an opening therein into said channel;
a power module disposed on said cold plate, said power module comprising a metallic base that is larger than said opening in said mounting face of said cold plate so that said metallic base overlies said cold plate around said opening to seal against said cold plate adjacent said opening, said metallic base comprising metallic fins that are disposed through said opening in said face of said cold plate into said channel so that coolant fluid flow through said cold plate passes said fins wherein said fins are secured to a side of said channel opposite said opening into said channel, said metallic base comprising a mounting face on said metallic base opposite said fins; and
a semiconductor wafer disposed on said mounting face of said metallic base so that heat generated in said semiconductor wafer moves directly through said metallic base and said fins into said coolant fluid in said channel.
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Abstract
The semiconductor wafer of the power module is mounted directly, separated only by thermal expansion control layers and insulator layers, on the metal base which has fins or pins integrally formed thereon. This module is mounted on a coolant fluid flow chamber so that the module mounting is not a thermal interface. In this way, maximum power module cooling is achieved with minimum fluid flow.
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Citations
7 Claims
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1. A power module cooling system comprising:
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a cold plate comprising a fluid inlet and a fluid outlet, a channel interconnecting said fluid inlet and said fluid outlet, and a mounting face having an opening therein into said channel; a power module disposed on said cold plate, said power module comprising a metallic base that is larger than said opening in said mounting face of said cold plate so that said metallic base overlies said cold plate around said opening to seal against said cold plate adjacent said opening, said metallic base comprising metallic fins that are disposed through said opening in said face of said cold plate into said channel so that coolant fluid flow through said cold plate passes said fins wherein said fins are secured to a side of said channel opposite said opening into said channel, said metallic base comprising a mounting face on said metallic base opposite said fins; and a semiconductor wafer disposed on said mounting face of said metallic base so that heat generated in said semiconductor wafer moves directly through said metallic base and said fins into said coolant fluid in said channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification