Solid state lighting devices with accessible electrodes and methods of manufacturing
View Patent ↗Various embodiments of light emitting dies and solid state lighting (“SSL”) devices with light emitting dies, assemblies, and methods of manufacturing are described herein. In one embodiment, a light emitting die includes an SSL structure configured to emit light in response to an applied electrical voltage, a first electrode carried by the SSL structure, and a second electrode spaced apart from the first electrode of the SSL structure. The first and second electrode are configured to receive the applied electrical voltage. Both the first and second electrodes are accessible from the same side of the SSL structure via wirebonding.
1. A light emitting device, comprising:
a first semiconductor material;
a second semiconductor material spaced apart from the first semiconductor material;
an active region between the first and second semiconductor materials;
an opening extending completely through the second semiconductor material and the active region and only a portion of the first semiconductor material;
a passivation material having a first passivation portion lining a sidewall of the opening and a second passivation portion extending laterally relative to the first passivation portion external to the opening;
a first electrode in the opening and adjacent the first passivation portion; and
a second electrode external to the opening between the second semiconductor material and the second passivation portion of the passivation material, a portion of the second electrode being exposed through the first semiconductor material, the active region, and the second semiconductor material; and
a non-conductive substrate proximate the second semiconductor material.
2. The light emitting device of claim 1 wherein the first electrode is in direct contact with the non-conductive substrate.
3. The light emitting device of claim 1 wherein the first electrode has a first end in direct contact with the non-conductive substrate and a second end within the first semiconductor material.
4. The light emitting device of claim 1 wherein:
the first electrode has a first end proximate the first semiconductor material and a second end proximate the second semiconductor material;
the second passivation portion has a first surface and a second surface opposite the first surface, the first surface being in contact with the second electrode; and
the second surface of the second passivation portion is generally co-planar with the second end of the first electrode.
5. The light emitting device of claim 1 wherein:
the first electrode has a first end proximate the first semiconductor material and a second end proximate the second semiconductor material;
the second passivation portion of the passivation material has a first surface and a second surface opposite the first surface, the first surface being in contact with the second electrode;
the second surface of the second passivation portion is generally co-planar with the second end of the first electrode; and
both the second surface of the second passivation portion and the second end of the first electrode are in contact with the non-conductive substrate.
6. The light emitting device of claim 1 wherein the first passivation portion of the passivation material electrically isolates the first electrode from the active region and the second semiconductor material
7. The light emitting device of claim 1 , further comprising an electrical coupler proximate the non-conductive substrate.
8. The light emitting device of claim 1 , further comprising:
an electrical coupler proximate the non-conductive substrate; and
a signal routing element coupling the first electrode to the electrical coupler.
9. A light emitting device, comprising:
a first semiconductor material;
a second semiconductor material spaced apart from the first semiconductor material;
an active region between the first and second semiconductor materials;
a first electrode extending through the second semiconductor material, the active region and a portion of the first semiconductor material, wherein the first electrode includes:
a covered portion, and
an exposed portion extending from the covered portion of the first electrode, wherein the exposed portion of the first electrode is exposed through the first semiconductor material, the active region, and the second semiconductor material; and
a second electrode in contact with the second semiconductor material and surrounding at least a portion of the first electrode, wherein the second electrode includes—
a covered portion, and
an exposed portion extending from the covered portion of the second electrode, wherein the portion of the second electrode is exposed through the first semiconductor material, the active region, the second semiconductor material, and the first electrode.
10. The light emitting device of claim 9 wherein the covered portion of the first electrode includes a plurality of individual sections spaced apart from one another.
11. The light emitting device of claim 9 wherein the covered portion of the second electrode includes a plurality of individual sections spaced apart from one another.
12. The light emitting device of claim 9 wherein:
the covered portion of the first c 1 ectrode includes a plurality of individual sections spaced apart from one another; and
the covered portion of the second electrode includes a plurality of individual sections spaced apart from one another.