NON-SEGMENTED U-SHAPED UBM FOR SHIFTED LUMINANCE
Provided is a light-emitting diode (LED) device that includes a continuous non-segmented edge contact along at least one side of a semiconductor layer. A first set of independent contacts connected to a first doped layer and a set of edge contacts connected to the second doped layer. Multiple conductive vias connect the independent contacts to the first doped layer, allowing differing corresponding via currents to be applied to the first doped layer through the vias independent of one another.
1 . A light emitting diode (LED) device comprising:
a first doped semiconductor layer;
a second doped semiconductor layer;
a plurality of first contacts each electrically connected to the first doped semiconductor layer;
a plurality of edge contacts each electrically connected to the second doped semiconductor layer, the plurality of edge contacts comprising a continuous non-segmented layer along at least one side of the second doped semiconductor layer with no separation by an insulating layer; and
an array of a plurality of vias arranged across the device, the plurality of vias connecting the plurality of first contacts to the first doped semiconductor layer, each of the plurality of vias connecting at most one corresponding first contact of the plurality of first contacts to the first doped semiconductor layer.
2 . The device of claim 1 , wherein the plurality of edge contacts are along only one side of the second doped semiconductor layer.
3 . The device of claim 1 , wherein the plurality of edge contacts are along one side and partially along two sides adjacent the one side of the second doped semiconductor layer.
4 . The device of claim 3 , wherein the plurality of edge contacts are along one side and completely along two sides adjacent the one side of the second doped semiconductor layer.
5 . The device of claim 1 , wherein the plurality of edge contacts are along one side and partially along a second side adjacent the one side of the second doped semiconductor layer.
6 . The device of claim 1 , wherein the plurality of edge contacts are along one side and a second opposing side of the second doped semiconductor layer.
7 . The device of claim 1 , wherein the first doped semiconductor layer is between the plurality of first contacts and the second doped semiconductor layer.
8 . The device of claim 7 , further comprising an insulating layer between the first doped semiconductor layer and the plurality of first contacts.
9 . The device of claim 8 , wherein the plurality of vias connected the plurality of first contacts to the first doped semiconductor layer through the insulating layer.
10 . The device of claim 9 , further comprising an electrode layer between the first doped semiconductor layer and the insulating layer and in contact with the first doped semiconductor layer, wherein the electrode layer is substantially transparent.
11 . The device of claim 10 , wherein the electrode layer is arranged as multiple discrete areal segments separated by electrically insulating material so that transverse electrical conduction between adjacent areal segments is substantially prevented, and each areal segment of the electrode layer is connected to at most one corresponding contact of the plurality of first contacts.
12 . The device of claim 1 , wherein the second doped semiconductor layer is between the plurality of first contacts and the first doped semiconductor layer.
13 . The device of claim 12 , further comprising an insulating layer between the second doped semiconductor layer and the plurality of first contacts.
14 . The device of claim 13 , wherein the plurality of vias connect the plurality of first contacts to the first doped semiconductor layer through the insulating layer and the second doped semiconductor layer, and the plurality of vias are electrically insulated from the second doped semiconductor layer.
15 . The device of claim 1 , further comprising an array of a second plurality of vias arranged across the device, the second plurality of vias connecting the plurality of edge contacts to the second doped semiconductor layer.
16 . The device of claim 15 , wherein each via of the second plurality of vias connects at most one corresponding contact of the plurality of edge contacts to the second doped semiconductor layer.
17 . A light emitting diode (LED) device comprising:
a first doped semiconductor layer;
a second doped semiconductor layer;
a plurality of first contacts each electrically connected to the second doped semiconductor layer;
a plurality of edge contacts each electrically connected to the second doped semiconductor layer, the plurality of edge contacts comprising a continuous non-segmented layer along at least one side of the second doped semiconductor layer with no separation by an insulating layer; and
an array of a plurality of vias arranged across the device, the plurality of vias connecting the plurality of first contacts to the second semiconductor layer, each of the plurality of vias connecting at most one corresponding first contact of the plurality of first contacts to the second semiconductor layer.
18 . The device of claim 17 , wherein the plurality of edge contacts are along only one side of the second doped semiconductor layer, or wherein the plurality of edge contacts are along one side and partially along a second side adjacent the one side of the second doped semiconductor layer, or wherein the plurality of edge contacts are along one side and a second opposing side of the second doped semiconductor layer.
19 . The device of claim 17 , wherein the plurality of edge contacts are along one side and partially along two sides adjacent the one side of the second doped semiconductor layer.
20 . The device of claim 19 , wherein the plurality of edge contacts are along one side and completely along two sides adjacent the one side of the second doped semiconductor layer.