Electronic devices with yielding substrates
First Claim
Patent Images
1. An electronic device comprising:
- an unpackaged inorganic light-emitting diode (LED) die having first and second distinct non-coplanar contacts on a first surface thereof; and
a substrate that is (i) pliant in response to force and resilient or (ii) permanently deformable in response to force, the substrate having first and second conductive traces on a first surface thereof, the first and second conductive traces being separated on the substrate by a gap therebetween,wherein the first and second contacts are adhesively bonded to and in electrical contact with, respectively, the first and second conductive traces with a pressure-activated adhesive material notwithstanding the non-coplanarity of the first and second contacts, and without electrically bridging the traces together or electrically bridging the contacts together, the substrate comprising a local flexing or a local deformation for maintaining electrical contact between the contacts and traces during operation of the unpackaged inorganic LED die.
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Abstract
In accordance with certain embodiments, an unpackaged inorganic LED die is adhered directly to a yielding substrate with a pressure-activated adhesive notwithstanding any nonplanarity of the surface of the unpackaged inorganic LED die or non-coplanarity of the contacts thereof.
171 Citations
30 Claims
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1. An electronic device comprising:
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an unpackaged inorganic light-emitting diode (LED) die having first and second distinct non-coplanar contacts on a first surface thereof; and a substrate that is (i) pliant in response to force and resilient or (ii) permanently deformable in response to force, the substrate having first and second conductive traces on a first surface thereof, the first and second conductive traces being separated on the substrate by a gap therebetween, wherein the first and second contacts are adhesively bonded to and in electrical contact with, respectively, the first and second conductive traces with a pressure-activated adhesive material notwithstanding the non-coplanarity of the first and second contacts, and without electrically bridging the traces together or electrically bridging the contacts together, the substrate comprising a local flexing or a local deformation for maintaining electrical contact between the contacts and traces during operation of the unpackaged inorganic LED die. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 30)
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27. An electronic device comprising:
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a unpackaged inorganic LED die having first and second spaced-apart contacts on a first surface thereof; and a substrate that is (i) pliant in response to force and resilient or (ii) permanently deformable in response to force, the substrate having first and second conductive traces on a first surface thereof in a bonding region, the first and second conductive traces defining a gap therebetween, wherein (i) the first and second contacts are adhesively bonded to and in electrical contact with, respectively, the first and second conductive traces with a pressure-activated adhesive material without electrically bridging the traces together or electrically bridging the contacts together, (ii) at least in the bonding region, a height of the first and second traces above the first surface of the substrate does not exceed 10 μ
m, and (iii) electrical contact between the contacts and traces is maintained during operation of the unpackaged inorganic LED die notwithstanding the height of the first and second traces above the first surface of the substrate. - View Dependent Claims (28)
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29. An electronic device comprising:
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an unpackaged inorganic LED die comprising a plurality of active semiconductor layers and a plurality of contacts, a first and a second of the active semiconductor layers collectively defining a non-planar first surface to which a first and a second of the contacts are joined; and a substrate that is (i) pliant in response to force and resilient or (ii) permanently deformable in response to force, the substrate having first and second conductive traces on a first surface thereof, the first and second conductive traces being separated on the substrate by a gap therebetween, wherein the first and second contacts are adhesively bonded to and in electrical contact with, respectively, the first and second conductive traces with a pressure-activated adhesive material notwithstanding the non-planarity of the first surface of the unpackaged inorganic LED die, and without electrically bridging the traces together or electrically bridging the contacts together, the substrate comprising a local flexing or a local deformation for maintaining electrical contact between the contacts and traces during operation of the unpackaged inorganic LED die.
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Specification