Side interconnect for light emitting device
View Patent ↗Embodiments of the invention include a semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region. A metal n-contact is connected to the n-type region. A metal p-contact is in direct contact with the p-type region. An interconnect is electrically connected to one of the n-contact and the p-contact. The interconnect is disposed adjacent to the semiconductor structure.
1. A light emitting device comprising:
a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the semiconductor structure having a first side and a second side wherein the second side is opposite the first side;
a metal n-contact connected to the n-type region and a metal p-contact in direct contact with the p-type region, wherein the n-contact and the p-contact are both formed on the first side of the semiconductor structure, wherein a majority of light extracted from the semiconductor structure is extracted from the second side of the semiconductor structure; and
an interconnect in direct contact with one of the n-contact and the p-contact, wherein the interconnect is disposed adjacent to the semiconductor structure;
wherein the p-contact is disposed over a sidewall of the semiconductor structure and over the interconnect.
2. The light emitting device of claim 1 further comprising a growth substrate overlying the interconnect and the semiconductor structure.
3. The light emitting device of claim 2 wherein no semiconductor material is disposed between the interconnect and the growth substrate.
4. The light emitting device of claim 2 wherein the interconnect is a first interconnect, the device further comprising a second interconnect electrically connected to the other of the n-contact and the p-contact, wherein the semiconductor structure is disposed between the second interconnect and the growth substrate.
5. The light emitting device of claim 4 wherein the first interconnect is electrically connected to the p-contact and the second interconnect is electrically connected to the n-contact.
6. The light emitting device of claim 4 wherein the second interconnect is substantially aligned with the semiconductor structure such that no portion of the first interconnect is disposed beneath the semiconductor structure.
7. The light emitting device of claim 2 wherein the interconnect is a first interconnect, the device further comprising a second interconnect electrically connected to the other of the n-contact and the p-contact, wherein the second interconnect is disposed adjacent to the semiconductor structure.
8. The light emitting device of claim 2 wherein the p-contact is disposed between the interconnect and the growth substrate.
9. The light emitting device of claim 1 wherein the p-contact is disposed between a distributed Bragg reflector and the interconnect.
10. The light emitting device of claim 1 wherein the metal n-contact is disposed in a plurality of vias etched in the semiconductor structure.
11. The light emitting device of claim 1 wherein the interconnect is a different material from the metal n-contact and the metal p-contact.
12. The light emitting device of claim 1 wherein the interconnect is one of gold and copper.
13. A semiconductor light emitting device comprising:
a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the semiconductor structure having a first side and a second side wherein the second side is opposite the first side;
a metal n-contact in direct contact with the n-type region and a metal p-contact in direct contact with the p-type region, wherein the n-contact and the p-contact are both formed on the first side of the semiconductor structure, wherein a majority of light extracted from the semiconductor structure is extracted from the second side of the semiconductor structure; and
a first interconnect electrically connected to one of the n-contact and the p-contact and a second interconnect electrically connected to the other of the n-contact and the p-contact, wherein the semiconductor structure is disposed above the first interconnect and no semiconductor structure is disposed above the second interconnect;
wherein the p-contact is disposed over a sidewall of the semiconductor structure and over the second interconnect.
14. The semiconductor light emitting device of claim 13 further comprising a growth substrate disposed above the semiconductor structure and the second interconnect.
15. The semiconductor light emitting device of claim 14 further comprising a wavelength converting material disposed above the growth substrate.
16. The semiconductor light emitting device of claim 14 wherein the growth substrate is in direct contact with the semiconductor structure.
17. The semiconductor light emitting device of claim 13 wherein the p-contact is disposed between a distributed Bragg reflector and the second interconnect.
18. The semiconductor light emitting device of claim 13 wherein a portion of the metal p-contact is disposed over a portion of the metal n-contact.
19. The semiconductor light emitting device of claim 13 wherein the first and second interconnects are separated by a dielectric.
20. The semiconductor light emitting device of claim 19 wherein the dielectric is in direct contact with the metal p-contact.