Multi-Junction LED
OwnerGhulam Hasnain, Steven D. Lester +2inventors
InventorsGhulam Hasnain, Steven D. Lester, Syn-Yem Hu, Jeff Ramer
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Abstract
A light source and method for making the same are disclosed. The light source includes a substrate and a light emitting structure that is deposited on the substrate. A barrier divides the light emitting structure into first and second segments that are electrically isolated from one another. A serial connection electrode connects the first segment in series with the second segment. A first blocking diode between the light emitting structure and the substrate prevents current from flowing between the light emitting structure and the substrate when the light emitting structure is emitting light. The barrier extends through the light emitting structure into the first blocking diode.
Claims5
A method for fabricating a light source, said method comprising
- depositing a transition layer comprising a semiconductor material of a first conductivity type on a substrate;
- depositing a blocking diode layer of an opposite conductivity type on said transition layer;
- depositing a light emitting structure on said blocking diode layer
- generating a barrier that divides said light emitting structure into first and second segments;
- and
- depositing a serial connection electrode that connects said first and second substrates in series, wherein said barrier extends through said light emitting structure into said first blocking diode layer, said blocking diode layer preventing current from flowing from said light emitting structure to said substrate when said light emitting structure is generating light.
Dependencies are inferred from the claim text.