Horizontal light emitting diodes including phosphor particles
First Claim
Patent Images
1. A light emitting diode comprising:
- a diode region having first and second opposing faces and including therein an n-type layer and a p-type layer;
an anode contact that ohmically contacts the p-type layer and extends on the first face;
a cathode contact that ohmically contacts the n-type layer and that also extends on the first face;
a transparent substrate on the second face, the transparent substrate including an inner face adjacent the second face, an outer face remote from the second face and a sidewall that extends from the outer face to the inner face; and
a conformal layer that comprises phosphor having an average equivalent particle diameter d50 of between about 10 μ
m and about 20 μ
m, on the outer face and extending on the sidewall oblique to the inner face.
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Abstract
Horizontal light emitting diodes include anode and cathode contacts on the same face and a transparent substrate having an oblique sidewall. A conformal phosphor layer having an average equivalent particle diameter d50 of at least about 10 μm is provided on the oblique sidewall. High aspect ratio substrates may be provided. The LED may be directly attached to a submount.
64 Citations
28 Claims
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1. A light emitting diode comprising:
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a diode region having first and second opposing faces and including therein an n-type layer and a p-type layer; an anode contact that ohmically contacts the p-type layer and extends on the first face; a cathode contact that ohmically contacts the n-type layer and that also extends on the first face; a transparent substrate on the second face, the transparent substrate including an inner face adjacent the second face, an outer face remote from the second face and a sidewall that extends from the outer face to the inner face; and a conformal layer that comprises phosphor having an average equivalent particle diameter d50 of between about 10 μ
m and about 20 μ
m, on the outer face and extending on the sidewall oblique to the inner face. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification