EP0065686A2
Expired / Lapsed
EP
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Power device module
Assignee: General Electric Co
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Filing: 1982-05-08
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Granted: —
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Expires: 2002-05-08
Abstract
Abstract An improved power device module comprises a power device such as a power transistor or power resistor attached to a dielectric substrate such as beryllia ceramic, which, in turn, is attached to an aluminum heat exchanger with a structural adhesive.
Inventors
- 👤 Alexander John Yerman
- 👤 James Anthony Loughran
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 13:04
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/20; H10W40/22; H10W40/25; H10W40/251; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H05K3/00; H05K3/0058; H05K3/38; H05K3/386
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
87 words
An improved power device module, comprising: a) a power device; b) a dielectric substrate having upper and lower surfaces, said power device being attached to said upper surface of said dielectric substrate, and the main area of said dielectric substrate being larger than the main area of said power device; c) an aluminum heat exchanger having an upper surface; and d) a structural adhesive disposed between substantially the entire area of said lower surface of said dielectric substrate and said upper surface of said aluminum heat exchanger.
Claim 2
Dependent Claim
87 words
An improved power device module, comprising: a) a power device; b) a dielectric substrate having upper and lower surfaces, said power device being attached to said upper surface of said dielectric substrate, and the main area of said dielectric substrate being larger than the main area of said power device; c) an aluminum heat exchanger having an upper surface; and d) a structural adhesive disposed between substantially the entire area of said lower surface of said dielectric substrate and said upper surface of said aluminum heat exchanger.
Claim 3
Dependent Claim
14 words
The power device module of claim 1 wherein said dielectric substrate comprises beryllia ceramic.
Claim 4
Dependent Claim
24 words
The power device module of claim 2 wherein said beryllia ceramic has a thermal conductivity of about 2.2 watts per centimeter per degree Celsius.
Claim 5
Dependent Claim
23 words
The power device module of claim 1 wherein said dielectric substrate is selected from the group consisting of beryllia ceramic and alumina ceramic.
Claim 6
Dependent Claim
22 words
. The power device module of claim 4 wherein said dielectric substrate has a main area greater than about 3 square centimeters.
Claim 7
Dependent Claim
28 words
The power device module of claim 4 wherein said dielectric substrate has a main area in excess of about 5 times the main area of said power device.
Claim 8
Dependent Claim
15 words
The power device module of claim 1 wherein said structural adhesive comprises a polymer based-adhesive.
Claim 9
Dependent Claim
13 words
The power device module of claim 7 wherein said structural adhesive comprises epoxy.
Claim 10
Dependent Claim
16 words
The power device module of claim 1 wherein said structural adhesive comprises a thermally conductive filler
Claim 11
Dependent Claim
27 words
The power device module of claim 9 wherein said conductive filler is selected from the group consisting of powdered aluminum, powdered copper, powdered silver and powdered beryllia.
Claim 12
Dependent Claim
27 words
The power device module of claim 1 wherein said structural adhesive is selected from the group consisting of a polymer, a thermoplastic adhesive, and an elastomeric adhesive.
Claim 13
Dependent Claim
20 words
The power device module of claim 4 wherein said' dielectric substrate has a thickness between about 20 and 100 mils.
Claim 14
Dependent Claim
45 words
The power device module of claim 1 wherein said dielectric substrate has a thermal expansion coefficient in the normal temperature range of operation of said power device module which coefficient is between the thermal expansion coefficients of said power device and said aluminum heat exchanger.
Claim 15
Dependent Claim
15 words
The power device module of claim 1 wherein said aluminum heat exchanger comprises extruded aluminum.
Claim 16
Dependent Claim
27 words
The power device module of claim 1 further comprising structural adhesive configured into a fillet around at least part of the peripheral edge of said ceramic substrate.
References Cited (Backward Citations)
No citation records indexed.
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