Light emitting devices having roughened/reflective contacts and methods of fabricating same
First Claim
1. A light emitting device, comprising:
- an active region comprising semiconductor material;
a first contact on the active region;
a photon absorbing wire bond pad on the first contact, the wire bond pad having an area less than the area of the first contact; and
a reflective structure disposed between the first contact and the wire bond pad and having an area that is less than the area of the active region;
wherein the reflective structure comprises;
a roughened area of the first contact; and
a reflective metal layer on the roughened area of the first contact; and
a p-type semiconductor material disposed between the first contact and the active region.
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Accused Products
Abstract
Light emitting devices include an active region of semiconductor material and a first contact on the active region. The first contact is configured such that photons emitted by the active region pass through the first contact. A photon absorbing wire bond pad is provided on the first contact. The wire bond pad has an area less than the area of the first contact. A reflective structure is disposed between the first contact and the wire bond pad such that the reflective structure has substantially the same area as the wire bond pad. A second contact is provided opposite the active region from the first contact. The reflective structure may be disposed only between the first contact and the wire bond pad. Methods of fabricating such devices are also provided.
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Citations
9 Claims
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1. A light emitting device, comprising:
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an active region comprising semiconductor material; a first contact on the active region; a photon absorbing wire bond pad on the first contact, the wire bond pad having an area less than the area of the first contact; and a reflective structure disposed between the first contact and the wire bond pad and having an area that is less than the area of the active region; wherein the reflective structure comprises; a roughened area of the first contact; and a reflective metal layer on the roughened area of the first contact; and a p-type semiconductor material disposed between the first contact and the active region. - View Dependent Claims (2, 3, 4)
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5. A light emitting device, comprising:
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an active region comprising semiconductor material; a first contact on the active region; a photon absorbing wire bond pad on the first contact, the wire bond pad having an area less than the area of the first contact; and a reflective structure disposed between the first contact and the wire bond pad and having an area that is less than the area of the active region; wherein the reflective structure comprises; a roughened area of the first contact; and a reflective metal layer on the roughened area of the first contact; and an n-type semiconductor material between the first contact and the active region.
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6. A method of fabricating a light emitting device, comprising:
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forming an active region of semiconductor material; forming a first contact on the active region; forming a reflective structure on the first contact and having an area less than an area of the active region; and forming a photon absorbing wire bond pad on reflective structure, the wire bond pad having an area less than the area of the first contact; wherein forming a reflective structure comprises; forming a roughened area of the first contact; and forming a reflective metal layer on the roughened area of the first contact; the method further comprising forming a p-type semiconductor material disposed between the first contact and the active region. - View Dependent Claims (7, 8)
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9. A method of fabricating a light emitting device, comprising:
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forming an active region of semiconductor material; forming a first contact on the active region; forming a reflective structure on the first contact and having an area less than an area of the active region; and forming a photon absorbing wire bond pad on reflective structure, the wire bond pad having an area less than the area of the first contact; wherein forming a reflective structure comprises; forming a roughened area of the first contact; and forming a reflective metal layer on the roughened area of the first contact; the method further comprising forming an n-type semiconductor material between the first contact and the active region.
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Specification