Light emitting device
View Patent ↗A conductive element with a lateral oxidation barrier is provided for the control of lateral oxidation processes in semiconductor devices such as lasers, vertical cavity surface emitting lasers and light emitting diodes. The oxidation barrier is formed through modification of one or more layers which initially were receptive to oxidation. The quality of material directly below the oxidation barrier may be preserved. Related applications include the formation of vertical cavity surface emitting lasers on non-GaAs substrates and on GaAs substrates.
1. A light emitting device comprising:
a first mirror;
a light emitting active layer disposed above said first mirror;
at least a first oxidizable layer having an oxidized region which is significantly oxidized, said first oxidizable layer being disposed above said light emitting active layer;
at least one semiconductor layer residing above at least a portion of said first oxidizable layer;
a second mirror disposed above said light emitting active layer;
top and bottom electrical contacts disposed to communicate with said light emitting active layer;
interconnect metallization deposited above at least a portion of said semiconductor layer and in contact with said top electrical contact; and
at least one basin disposed proximal to said oxidized region wherein said basin is provided for allowing said first region to be oxidized.
2. The light emitting device recited in claim 1 wherein said first oxidizable layer further comprises a second region which is not significantly oxidized.
3. The light emitting device recited in claim 1 wherein said top electrical contact is characterized by a center.
4. The light emitting device recited in claim 3 , wherein said basin does not hem said center.
5. The light emitting device recited in claim 1 wherein said semiconductor layer has an electrically insulating region formed by ion implantation.
6. The light emitting device recited in claim 5 , wherein said electrically insulating region resides above at least a portion of said oxidized region.
7. A light emitting device comprising:
a first mirror;
a light emitting active layer disposed above said first mirror;
at least a first oxidizable layer having an oxidized region which is significantly oxidized, said first oxidizable layer being disposed above said light emitting active layer;
at least one semiconductor layer residing above at least a portion of said first oxidizable layer;
a second mirror disposed above said light emitting active layer;
top and bottom electrical contacts disposed to communicate with said light emitting active layer, said top electrical contact being characterized by a center;
interconnect metallization deposited above at least a portion of said semiconductor layer and in contact with said top electrical contact; and
at least one pit disposed proximal to said oxidized region, said pit not hemming said center, wherein said pit is provided for allowing said first region to be oxidized.
8. The light emitting device recited in claim 7 , wherein said semiconductor layer has an electrically insulating region formed by ion implantation.
9. The light emitting device recited in claim 8 , wherein said electrically insulating region resides above at least a portion of said oxidized region.
10. A light emitting device comprising:
a first mirror;
a light emitting active layer disposed above said first mirror;
at least a first oxidizable layer having an oxidized region which is significantly oxidized, said first oxidizable layer being disposed above said light emitting active layer;
at least one semiconductor layer residing above at least a portion of said first oxidizable layer;
a second mirror disposed above said light emitting active layer;
top and bottom electrical contacts disposed to communicate with said light emitting active layer;
interconnect metallization deposited above at least a portion of said semiconductor layer and in contact with said top electrical contact; and
at least one pit disposed proximal to said oxidized region, said pit not hemming said top electrical contact, wherein said pit is provided for allowing said first region to be oxidized.
11. The light emitting device recited in claim 10 , wherein said semiconductor layer has an electrically insulating region formed by ion implantation.
12. The light emitting device recited in claim 11 , wherein said electrically insulating region resides above at least a portion of said oxidized region.