LED with series-connected monolithically integrated mesas
First Claim
1. A light emitting device comprising:
- an electrically insulating substrate;
a plurality of elongated light emitting diode mesas disposed generally parallel to one another on the substrate, the mesas being electrically isolated from one another, each light emitting diode mesa defined by a stack of layers including a first conductivity type layer disposed between the substrate and a second conductivity type layer and further including at least one of;
an active region disposed between the first conductivity type layer and the second conductivity type layer, anda buffer layer disposed between the substrate and the first conductivity type layer; and
electrically conductive connection material disposed on the substrate between neighboring elongated light emitting diode mesas, the conductive material electrically connecting the first conductivity type layer of one mesa with the second conductivity type layer of the neighboring mesa along the long dimension of the neighboring elongated mesas to series-interconnect the light emitting diode mesas.
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Accused Products
Abstract
A light emitting semiconductor device die (10, 110, 210, 310) includes an electrically insulating substrate (12, 112). First and second spatially separated electrodes (60, 62, 260, 262, 360, 362) are disposed on the electrically insulating substrate. The first and second electrodes define an electrical current flow direction directed from the first electrode to the second electrode. A plurality of light emitting diode mesas (30, 130, 130′, 230, 330) are disposed on the substrate between the first and second spatially separated electrodes. Electrical series interconnections (50, 150, 250, 350) are disposed on the substrate between neighboring light emitting diode mesas. Each series interconnection carries electrical current flow between the neighboring mesas in the electrical current flow direction.
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Citations
23 Claims
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1. A light emitting device comprising:
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an electrically insulating substrate; a plurality of elongated light emitting diode mesas disposed generally parallel to one another on the substrate, the mesas being electrically isolated from one another, each light emitting diode mesa defined by a stack of layers including a first conductivity type layer disposed between the substrate and a second conductivity type layer and further including at least one of; an active region disposed between the first conductivity type layer and the second conductivity type layer, and a buffer layer disposed between the substrate and the first conductivity type layer; and electrically conductive connection material disposed on the substrate between neighboring elongated light emitting diode mesas, the conductive material electrically connecting the first conductivity type layer of one mesa with the second conductivity type layer of the neighboring mesa along the long dimension of the neighboring elongated mesas to series-interconnect the light emitting diode mesas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light emitting device comprising:
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an electrically insulating substrate; a plurality of elongated light emitting diode mesas disposed generally parallel to one another on the substrate, the mesas being electrically isolated from one another, each mesa defined by a stack of layers including a first conductivity type layer disposed between the substrate and a second conductivity type layer; and electrically conductive connection material disposed on the substrate between neighboring elongated light emitting diode mesas, the conductive material electrically connecting the first conductivity type layer of one mesa with the second conductivity type layer of the neighboring mesa along the long dimension of the neighboring elongated mesas to series-interconnect the light emitting diode mesas; wherein the electrically insulating substrate includes electrically conductive substrate material and an electrically insulating layer electrically isolating the plurality of elongated light emitting diode mesas and the electrically conductive connection material from the electrically conductive substrate material.
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9. A light emitting device comprising:
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an electrically insulating substrate; a plurality of elongated light emitting diode mesas disposed generally parallel to one another on the substrate, the mesas being electrically isolated from one another, each mesa defined by a stack of layers including a first conductivity type layer disposed between the substrate and a second conductivity type layer; and electrically conductive connection material disposed on the substrate between neighboring elongated light emitting diode mesas, the conductive material electrically connecting the first conductivity type layer of one mesa with the second conductivity type layer of the neighboring mesa along the long dimension of the neighboring elongated mesas to series-interconnect the light emitting diode mesas, the electrically conductive connecting material conducting electrical current flow between each pair of neighboring elongated light emitting diode mesas in an electrical current flow direction that is substantially transverse to the long dimension of the elongated light emitting diode mesas. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A light emitting semiconductor device die comprising:
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an electrically insulating substrate; a linear arrangement of light emitting diode mesas disposed on the substrate, each light emitting diode mesa being elongated in a direction of elongation transverse to the linear direction of the linear arrangement, an elongation aspect ratio of the light emitting diode mesas being greater than 7;
1;electrical series interconnections disposed on the substrate between neighboring light emitting diode mesas of the linear arrangement, the series interconnections interconnecting the light emitting diode mesas in series to form a series-interconnected linear arrangement of light emitting diode mesas; and first and second electrodes electrically connecting at opposite ends with the series-interconnected linear arrangement of light emitting diode mesas, the linear arrangement of light emitting diode mesas extending in the linear direction between the first and second electrodes.
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17. A light emitting semiconductor device die comprising:
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an electrically insulating substrate; a linear arrangement of light emitting diode mesas disposed on the substrate, each light emitting diode mesa being elongated in a direction of elongation transverse to the linear direction of the linear arrangement, an elongation aspect ratio of the elongation being greater than 3;
1;electrical series interconnections disposed on the substrate between neighboring light emitting diode mesas of the linear arrangement, the series interconnections interconnecting the light emitting diode mesas in series to form a series-interconnected linear arrangement of light emitting diode mesas; and first and second electrodes electrically connecting at opposite ends with the series-interconnected linear arrangement of light emitting diode mesas, the linear arrangement of light emitting diode mesas extending in the linear direction between the first and second electrodes. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification