BONDED METAL AND CERAMIC PLATES FOR THERMAL MANAGEMENT OF OPTICAL AND ELECTRONIC DEVICES
First Claim
1. A device comprising:
- a. a first copper layer;
b. a ceramic layer;
c. a second copper layer;
d. a first active brazing alloy bonded between the first copper layer and the ceramic layer to form a first joining layer; and
e. a second active brazing alloy bonded between the ceramic layer and the second copper layer to form a second joining layer.
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0 Petitions
Accused Products
Abstract
A ceramic assembly includes one or more electrically and thermally conductive pads to be thermally coupled to a heat generating device, each conductive pad is electrically isolated from each other. The ceramic assembly includes a ceramic layer to provide this electrical isolation. The ceramic layer has high thermal conductivity and high electrical resistivity. A top surface and a bottom surface of the ceramic layer are each bonded to a conductive layer, such as copper, using an intermediate joining material. A brazing process is performed to bond the ceramic layer to the conductive layer via a joining layer. The joining layer is a composite of the joining material, the ceramic layer, and the conductive layer. The top conductive layer and the joining layer are etched to form the electrically isolated conductive pads. The conductive layers are bonded to the ceramic layer using a bare ceramic approach or a metallized ceramic approach.
107 Citations
25 Claims
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1. A device comprising:
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a. a first copper layer; b. a ceramic layer; c. a second copper layer; d. a first active brazing alloy bonded between the first copper layer and the ceramic layer to form a first joining layer; and e. a second active brazing alloy bonded between the ceramic layer and the second copper layer to form a second joining layer. - View Dependent Claims (2, 3, 4, 25)
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5. A device comprising:
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a. a first copper layer; b. a ceramic layer; c. a second copper layer; d. a first active brazing alloy layer bonded between the first copper layer and the ceramic layer to form a first joining layer, wherein the first copper layer and the first joining layer are configured to form a plurality of electrically isolated conductive pads; and e. a second active brazing alloy layer bonded between the ceramic layer and the second copper layer to form a second joining layer. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A device comprising:
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a. a first copper layer; b. a ceramic layer including a metallized first surface and a metallized second surface; c. a second copper layer; d. a first copper and ceramic joining layer bonded between the first copper layer and the metallized first surface of the ceramic layer to form a first joining layer, wherein the first copper layer, the first joining layer, and the metallized first surface are configured to form a plurality of electrically isolated conductive pads; and e. a second copper and ceramic joining layer bonded between the metallized second surface of the ceramic layer and the second copper layer to form a second joining layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A device comprising:
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a. a ceramic layer including a metallized first surface and a metallized second surface; b. a first copper layer plated to the metallized first surface, wherein the first plated copper layer and the metallized first surface are configured to form a plurality of electrically isolated conductive pads; and c. a second copper layer plated to the metallized second surface.
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- 22. The device of claim 22 wherein each of the plurality of electrically isolated pads includes an etched wall extending from a first surface of the first copper layer through the first copper layer and the metallized first surface, to a first surface of the ceramic layer, further wherein a slope of the etched wall is uniform through the first copper layer and the metallized first surface.
Specification