Integrated heat spreaders for light emitting devices (LEDs) and related assemblies
DCFirst Claim
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1. A light emitting device (LED) assembly comprising:
- an electrically insulating substrate;
a continuous thermally conductive layer adjacent a surface of the electrically insulating substrate;
a light emitting device adjacent the continuous thermally conductive layer so that the continuous thermally conductive layer is between an entirety of the light emitting device and the electrically insulating substrate, wherein the continuous thermally conductive layer extends beyond an edge of the light emitting device in at least one direction a distance greater than half of a width of the light emitting device; and
a plurality of thermally conductive vias through the electrically insulating substrate, wherein the plurality of thermally conductive vias are thermally and electrically coupled to the continuous thermally conductive layer and wherein portions of the electrically insulating substrate adjacent the light emitting device are free of the plurality of thermally conductive vias.
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Abstract
A light emitting device (LED) assembly may include an electrically insulating substrate and a thermally conductive layer on a surface of the insulating substrate. A light emitting device may be on the thermally conductive layer so that the thermally conductive layer is between the light emitting device and the electrically insulating substrate. Moreover, the thermally conductive layer may extend beyond an edge of the light emitting device in at least one direction a distance greater than half of a width of the light emitting device.
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Citations
59 Claims
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1. A light emitting device (LED) assembly comprising:
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an electrically insulating substrate; a continuous thermally conductive layer adjacent a surface of the electrically insulating substrate; a light emitting device adjacent the continuous thermally conductive layer so that the continuous thermally conductive layer is between an entirety of the light emitting device and the electrically insulating substrate, wherein the continuous thermally conductive layer extends beyond an edge of the light emitting device in at least one direction a distance greater than half of a width of the light emitting device; and a plurality of thermally conductive vias through the electrically insulating substrate, wherein the plurality of thermally conductive vias are thermally and electrically coupled to the continuous thermally conductive layer and wherein portions of the electrically insulating substrate adjacent the light emitting device are free of the plurality of thermally conductive vias. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A light emitting device (LED) assembly comprising:
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an electrically insulating substrate; a thermally conductive layer adjacent a surface of the electrically insulating substrate, wherein the thermally conductive layer is electrically conductive and wherein the thermally conductive layer comprises a substantially circular thermally conductive layer wherein the substantially circular thermally conductive layer comprises a plurality of notches around a perimeter thereof; a light emitting device adjacent the thermally conductive layer so that the thermally conductive layer is between the light emitting device and the electrically insulating substrate, wherein the thermally conductive layer extends beyond an edge of the light emitting device in at least one direction a distance greater than half of a width of the light emitting device; and a plurality of thermally conductive vias through the electrically insulating substrate, wherein the plurality of thermally conductive vias are thermally coupled to the thermally conductive layer and wherein portions of the electrically insulating substrate adjacent the light emitting device are free of the plurality of thermally conductive vias. - View Dependent Claims (15)
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16. A light emitting device (LED) assembly comprising:
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an electrically insulating substrate; a thermally conductive layer adjacent a surface of the electrically insulating substrate, wherein the thermally conductive layer is electrically conductive and wherein the thermally conductive layer comprises a substantially circular thermally conductive layer; a light emitting device adjacent the thermally conductive layer so that the thermally conductive layer is between the light emitting device and the electrically insulating substrate, wherein the thermally conductive layer extends beyond an edge of the light emitting device in at least one direction a distance greater than half of a width of the light emitting device; a plurality of thermally conductive vias through the electrically insulating substrate, wherein the plurality of thermally conductive vias are thermally coupled to the thermally conductive layer and wherein portions of the electrically insulating substrate adjacent the light emitting device are free of the plurality of thermally conductive vias; and a conductive trace on the electrically insulating substrate, wherein the conductive trace extends from the substantially circular thermally conductive layer.
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17. A light emitting device assembly comprising:
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an electrically insulating substrate having opposing first and second surfaces; a first thermally conductive layer adjacent the first surface of the electrically insulating substrate wherein the first thermally conductive layer is electrically conductive and wherein the first thermally conductive layer comprises a substantially circular first thermally conductive layer; a second thermally conductive layer adjacent the second surface of the electrically insulating substrate so that the electrically insulating substrate is between the first and second thermally conductive layers; a light emitting device adjacent the first thermally conductive layer so that portions of the first thermally conductive layer are between the light emitting device and the electrically insulating substrate in a direction perpendicular with respect to a surface of the electrically insulating substrate, and so that the electrically insulating substrate is between the light emitting device and portions of the second thermally conductive layer in the direction perpendicular with respect to the surface of the electrically insulating substrate; and a plurality of thermally conductive vias, wherein the plurality of thermally conductive vias are thermally coupled between the first and second thermally conductive layers and wherein portions of the electrically insulating substrate between the light emitting device and the second thermally conductive layer are free of the thermally conductive vias; and a conductive trace on the electrically insulating substrate, wherein the conductive trace extends from the substantially circular first thermally conductive layer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A light emitting device assembly comprising:
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an electrically insulating substrate having opposing first and second surfaces; a first thermally conductive layer adjacent the first surface of the electrically insulating substrate wherein the first thermally conductive layer is electrically conductive and wherein the first thermally conductive layer comprises a substantially circular first thermally conductive layer comprising a plurality of notches around a perimeter thereof; a second thermally conductive layer adjacent the second surface of the electrically insulating substrate so that the electrically insulating substrate is between the first and second thermally conductive layers; a light emitting device adjacent the first thermally conductive layer so that portions of the first thermally conductive layer are between the light emitting device and the electrically insulating substrate in a direction perpendicular with respect to a surface of the electrically insulating substrate, and so that the electrically insulating substrate is between the light emitting device and portions of the second thermally conductive layer in the direction perpendicular with respect to the surface of the electrically insulating substrate; and a plurality of thermally conductive vias, wherein the plurality of thermally conductive vias are thermally coupled between the first and second thermally conductive layers and wherein portions of the electrically insulating substrate between the light emitting device and the second thermally conductive layer are free of the thermally conductive vias.
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33. A light emitting device (LED) assembly comprising:
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an electrically insulating substrate; a substantially circular thermally conductive layer adjacent a surface of the insulating substrate; and a light emitting device adjacent the substantially circular thermally conductive layer so that the substantially circular thermally conductive layer is between the light emitting device and the electrically insulating substrate, wherein an edge of the substantially circular thermally conductive layer extends laterally beyond an edge of the light emitting device; wherein the substantially circular thermally conductive layer includes a plurality of notches around a perimeter thereof. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A light emitting device (LED) assembly comprising:
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an electrically insulating ceramic substrate having opposing first and second faces; a first thermally conductive layer on a first surface of the ceramic substrate; a second thermally conductive layer on the second surface of the ceramic substrate so that the ceramic substrate is between the first and second thermally conductive layers, wherein the second thermally conductive layer is electrically isolated from the first thermally conductive layer; and a light emitting device on the first thermally conductive layer so that the first thermally conductive layer is between the light emitting device and the ceramic substrate, wherein portions of the light emitting device and the first and second thermally conductive layers are aligned in a direction perpendicular with respect to a surface of the light emitting device wherein the first thermally conductive layer comprises a continuous thermally conductive layer between an entirety of the light emitting device and the ceramic substrate. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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57. A light emitting device assembly comprising:
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an electrically insulating substrate having opposing first and second surfaces; a first thermally conductive layer adjacent the first surface of the electrically insulating substrate; a second thermally conductive layer adjacent the second surface of the electrically insulating substrate so that the electrically insulating substrate is between the first and second thermally conductive layers; a light emitting device adjacent the first thermally conductive layer so that portions of the first thermally conductive layer are between the light emitting device and the electrically insulating substrate in a direction perpendicular with respect to a surface of the electrically insulating substrate, and so that the electrically insulating substrate is between the light emitting device and portions of the second thermally conductive layer in the direction perpendicular with respect to the surface of the electrically insulating substrate so that portions of the light emitting device and the first and second thermally conductive layers are aligned in the direction perpendicular with respect to the surface of the electrically insulating substrate; and a plurality of thermally conductive vias, wherein the plurality of thermally conductive vias are thermally coupled between the first and second thermally conductive layers and wherein portions of the electrically and the second thermally conductive layer are free of the thermally conductive vias; wherein the plurality of thermally conductive vias are outside an area of the first thermally conductive layer defined by a perimeter of the light emitting device. - View Dependent Claims (58, 59)
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Specification