High density interconnect for segmented LEDs
A light emitting diode (LED) may include a conductive via in a first portion of an epitaxial layer and a first contact on a second portion of the epitaxial layer. The first portion and the second portion may be separated by an isolation region. The LED may include a transparent conductive layer on the epitaxial layer.
1. A light emitting diode (LED) comprising:
an electrically conductive via in a first portion of an epitaxial layer, the electrically conductive via filling a contact hole formed in the first portion;
a p-type contact on a second portion of the epitaxial layer, the first portion and the second portion separated by an isolation region having a length extending in a first direction, the isolation region and the electrically conductive via separated by the first portion of the epitaxial layer;
an n-type contact in the first portion of the epitaxial layer, the n-type contact directly coupled to the electrically conductive via; and
a transparent electrically conductive layer formed on the epitaxial layer and having a length extending in a second direction, the second direction substantially perpendicular to the first direction.
2. The LED of claim 1 , wherein the epitaxial layer comprises:
an n-type layer;
an active region; and
a p-type layer.
3. The LED of claim 2 , wherein the isolation region and the electrically conductive via extend through the p-type layer, the active region, and a portion of the n-type layer.
4. The LED of claim 2 , wherein the transparent electrically conductive layer is on the n-type layer.
5. The LED of claim 2 , wherein the p-type contact is directly on the p-type layer.
6. The LED of claim 1 , wherein the second portion comprises a pixel.
7. The LED of claim 1 , further comprising:
an insulating lining between the electrically conductive via and a portion of the epitaxial layer.
8. The LED of claim 1 , wherein the isolation region has a width that is less than the length of the isolation region, and wherein the transparent electrically conductive layer has a width that is less than the length of the transparent electrically conductive layer.
9. A light emitting diode (LED) array comprising:
a first LED comprising an electrically conductive via that fills a contact hole formed in a first portion of an epitaxial layer, and a p-type contact on a second portion of the epitaxial layer, the first portion and the second portion separated by an isolation region having a length extending in a first direction, the isolation region and the electrically conductive via separated by the first portion of the epitaxial layer;
an n-type contact in the first portion of the epitaxial layer, the n-type contact directly coupled to the electrically conductive via; and
a second LED comprising the epitaxial layer, the second LED electrically coupled to the first LED through a transparent electrically conductive layer on the n-type layer of the epitaxial layer, the transparent electrically conductive layer having a length that extends in a second direction, the second direction substantially perpendicular to the first direction,
wherein the epitaxial layer comprises an n-type layer, an active region, and a p-type layer,
wherein the isolation region and the electrically conductive via extend through the p-type layer, the active region, and a portion of the n-type layer, and
wherein the first LED is separated from the second LED by a separation region.
10. The LED array of claim 9 , wherein the p-type contact is directly on the p-type layer.
11. The LED array of claim 9 , wherein the second portion comprises a first pixel.
12. The LED array of claim 9 , wherein the second LED comprises a second pixel.