Light emitting diode
First Claim
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1. An LED, comprising:
- a substrate, having a top face and a bottom face;
a buffer layer, disposed on the top face of the substrate;
an epitaxial layer, disposed on the buffer layer, comprising;
a first N-type epitaxial layer and a second N-type epitaxial layer;
a blocking layer, having patterned grooves, sandwiched between the first and the second N-type epitaxial layers, wherein the first and the second N-type epitaxial layers contacts to each other via a portion of the second N-type epitaxial layer in the patterned grooves;
a light emitting layer, disposed on the second N-type epitaxial layer; and
a P-type epitaxial layer, disposed on the light emitting layer;
a conductive layer, disposed on the P-type epitaxial layer;
a P-type electrode disposed on the conductive layer; and
an N-type electrode disposed on the blocking layer opposite to the P-type electrode, wherein the N-type electrode is separated from the second N-type epitaxial layer and has a portion extending into the patterned grooves to contact with the first N-type epitaxial layer.
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Abstract
An LED comprises a substrate, a buffer layer, an epitaxial layer and a conductive layer. The epitaxial layer comprises a first N-type epitaxial layer, a second N-type epitaxial layer, and a blocking layer with patterned grooves sandwiched between the first and second N-type epitaxial layers. The first and second N-type epitaxial layers make contact each other via the patterned grooves. Therefore, the LED enjoys a uniform current distribution and a larger light emitting area. A manufacturing method for the LED is also provided.
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Citations
7 Claims
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1. An LED, comprising:
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a substrate, having a top face and a bottom face; a buffer layer, disposed on the top face of the substrate; an epitaxial layer, disposed on the buffer layer, comprising; a first N-type epitaxial layer and a second N-type epitaxial layer; a blocking layer, having patterned grooves, sandwiched between the first and the second N-type epitaxial layers, wherein the first and the second N-type epitaxial layers contacts to each other via a portion of the second N-type epitaxial layer in the patterned grooves; a light emitting layer, disposed on the second N-type epitaxial layer; and a P-type epitaxial layer, disposed on the light emitting layer; a conductive layer, disposed on the P-type epitaxial layer; a P-type electrode disposed on the conductive layer; and an N-type electrode disposed on the blocking layer opposite to the P-type electrode, wherein the N-type electrode is separated from the second N-type epitaxial layer and has a portion extending into the patterned grooves to contact with the first N-type epitaxial layer. - View Dependent Claims (2, 3, 4)
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5. An LED, comprising:
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a substrate, having a top face and a bottom face; a buffer layer, disposed on the top face of the substrate; an epitaxial layer, disposed on the buffer layer, comprising a first N-type epitaxial layer and a second N-type epitaxial layer, a blocking layer with patterned grooves and sandwiched between the first and the second N-type epitaxial layers, a light emitting layer disposed on the second N-type epitaxial layer and a P-type epitaxial layer disposed on the light emitting layer; an N-type electrode, contacting to the first N-type epitaxial layer; a conductive layer, disposed on the P-type epitaxial layer; and a P-type electrode, disposed on the conductive layer; wherein the first and the second N-type epitaxial layers contact to each other via the patterned grooves, and the N-type electrode is disposed inside the patterned grooves of the blocking layer to contact with the first N-type epitaxial layer. - View Dependent Claims (6, 7)
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Specification