Light emitting diode emitter substrate with highly reflective metal bonding
First Claim
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1. A package structure, comprising:
- a substrate having a first side and a second side opposite to the first side;
a metal layer disposed over at least a portion of the second side of the substrate, wherein a segment of the metal layer extends through the substrate from the first side to the second side, and wherein a portion of the substrate is completely enclosed in a cross-sectional view by the metal layer;
a light-reflective layer disposed over the first side of the substrate; and
a photonic device bonded to the light-reflective layer from the first side;
wherein the package structure is free of a bonding wire over the second side of the substrate.
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Abstract
A package structure includes: a substrate having a first side and a second side opposite to the first side; a metal layer disposed over at least a portion of the second side of the substrate; a light-reflective layer disposed over the first side of the substrate; and a photonic device bonded to the light-reflective layer from the first side. A segment of the metal layer extends through the substrate from the first side to the second side, and a portion of the substrate is completely enclosed in a cross-sectional view by the metal layer. The package structure is free of a bonding wire over the second side of the substrate.
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Citations
20 Claims
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1. A package structure, comprising:
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a substrate having a first side and a second side opposite to the first side; a metal layer disposed over at least a portion of the second side of the substrate, wherein a segment of the metal layer extends through the substrate from the first side to the second side, and wherein a portion of the substrate is completely enclosed in a cross-sectional view by the metal layer; a light-reflective layer disposed over the first side of the substrate; and a photonic device bonded to the light-reflective layer from the first side; wherein the package structure is free of a bonding wire over the second side of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light-emitting diode (LED) packaging structure, comprising:
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a substrate having a front side and a back side; a metal layer that circumferentially surrounds in 360 degrees at least a portion of the substrate in a cross-sectional view; a plurality of bonding pads disposed over the front side of the substrate, the bonding pads each containing a light-reflective material, wherein the metal layer is disposed between the substrate and the bonding pads; a plurality of LED dies each bonded to a respective one of the bonding pads; a plurality of electrodes each disposed on a respective one of the LED dies; and a plurality of bonding wires electrically coupling the LED dies together, wherein for each bonding wire has one distal end is attached to a respective one of the bonding pads, and another opposite distal end is attached to the electrode of an adjacent LED die. - View Dependent Claims (12, 13, 14)
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15. A light-emitting diode (LED) packaging structure, comprising:
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a packaging substrate having a front surface and a back surface; a metal element that completely surrounds a segment of the packaging substrate, wherein the metal element includes a plurality of conductive through-silicon-via (TSV) features extending through the packaging substrate from the front surface to the back surface; a first reflective pad and a second reflective pad each located over the front surface of the packaging substrate, wherein the first and second reflective pads are configured to reflect radiation and are physically separated from each other; a first LED die and a second LED die bonded to the first reflective pad and the second reflective pad, respectively; and a bonding wire having first and second opposite ends, wherein the first end is bonded to the first reflective pad, and the second end is bonded to the second LED die. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification