LED display packaging with substrate removal and method of fabrication
First Claim
1. A method of fabricating a light emitting diode display package comprising the steps of:
- providing a substrate with a major surface;
forming an array of light emitting diodes on the major surface of the substrate, thereby forming a light emitting diode device having a defined display area; and
selectively removing the substrate from the light emitting diode devices thereby leaving an indium-gallium-aluminum-phosphide epilayer of the light emitting device exposed.
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Accused Products
Abstract
A light emitting diode display package and method of fabricating a light emitting diode (LED) display package including a light emitting diode array on a substrate, having row and column connection pads routed to display connection pads positioned on an uppermost surface of the LED array device, a separate silicon driver device having connection pads routed to an uppermost surface, positioned to cooperatively meet those of the LED device when properly registered, the LED device flip chip bump bonded to the driver device using standard C5 DCA, an underfill layer positioned between the space defined by the LED device and the driver device. The LED display and driver device package subsequently having selectively removed the substrate onto which the LED array was initially formed. The light emitted from the LED display device, being emitted through the remaining indium-gallium-aluminum-phosphide (InGaAlP) epilayer of the LED device.
52 Citations
23 Claims
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1. A method of fabricating a light emitting diode display package comprising the steps of:
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providing a substrate with a major surface; forming an array of light emitting diodes on the major surface of the substrate, thereby forming a light emitting diode device having a defined display area; and selectively removing the substrate from the light emitting diode devices thereby leaving an indium-gallium-aluminum-phosphide epilayer of the light emitting device exposed. - View Dependent Claims (2, 3, 4, 5)
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6. A method of fabricating a light emitting diode display package comprising the steps of:
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providing a substrate with a major surface; forming an array of light emitting diodes on the major surface of the substrate comprised of a plurality of indium-gallium-aluminum-phosphide (InGaAlP) light emitting diode structures, having a defined display area; forming a plurality of bond pads, in electrical cooperation with the array of light emitting diodes; providing a driver device formed on a silicon substrate, having a plurality of drive components formed therein; forming a plurality of bond pads, in electrical cooperation with the drive components, cooperatively positioned to engage the bond pads of the array of light emitting diodes; interfacing the plurality of bond pads, in electrical cooperation with the array of light emitting diodes, to the plurality of bond pads, in electrical cooperation with the drive components of the driver device, thereby electrically connecting the light emitting diode device to the driver device; and selectively removing the substrate from the light emitting diode device. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of fabricating a light emitting diode display package comprising the steps of:
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providing a substrate of semiconductor material with a major surface;
forming an array of light emitting diodes on the major surface of the substrate comprised of a plurality of indium-gallium-aluminum-phosphide (InGaAlP) light emitting diode structures, thereby forming a light emitting diode device having a defined display area;forming a plurality of bond pads, in electrical cooperation with the array of light emitting diodes, positioned on an uppermost surface of the display area; forming a plurality of row and column connections, routed to the plurality of bond pads in electrical cooperation with the array of light emitting diodes; providing a driver device formed on a silicon substrate, having a plurality of drive components formed therein; forming a plurality of bond pads, in electrical cooperation with the drive components, routed to an uppermost surface of the driver device, cooperatively positioned to engage the bond pads of the array of light emitting diodes; bump bonding the plurality of bond pads, in electrical cooperation with the array of light emitting diodes, to the plurality of bond pads, in electrical cooperation with the drive components of the driver device, thereby electrically connecting the light emitting diode device to the driver device; underfilling an area formed between the light emitting diode device and the driver device with a non-conductive material; and selectively removing the substrate of semiconductor material from the light emitting diode device. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of fabricating a light emitting diode display package comprising the steps of:
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providing a substrate of gallium arsenide with a major surface; forming an array of light emitting diodes on the major surface of the substrate comprised of a plurality of indium-gallium-aluminum-phosphide (InGaAlP) light emitting diode structures, thereby forming a light emitting diode device having a defined display area; forming a plurality of bond pads in electrical cooperation with the array of light emitting diodes, positioned on an uppermost surface of the display area; forming a plurality of row and column connections, routed to the plurality of bond pads in electrical cooperation with the array of light emitting diodes; providing a separate driver device formed on a silicon substrate, having a plurality of drive components formed therein; forming a plurality of bond pads in electrical cooperation with the drive components, routed to an uppermost surface of the driver device; bump bonding the plurality of bond pads in electrical cooperation with the light emitting diodes, in flip chip attachment of the plurality of bond pads in electrical cooperation with the drive components of the driver device, thereby electrically connecting the light emitting diode device to the driver device; underfilling an area formed between the light emitting diode device and the driver device with at least one of an epoxy and a polymer; and selectively removing the gallium arsenide substrate from the light emitting diode device thereby leaving an exposed epilayer. - View Dependent Claims (23)
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Specification