PACKAGING TECHNIQUE FOR THE FABRICATION OF POLARIZED LIGHT EMITTING DIODES
First Claim
1. A polarized light emitting apparatus, comprising:
- at least one semiconductor device emitting polarized light, wherein the semiconductor device includes at least one first marker indicating a polarization direction for the polarized light emitted by the semiconductor device; and
a package for containing the semiconductor device, wherein the package includes at least one second marker indicating a polarization direction for the polarized light emitted by the semiconductor device when contained within the package, the semiconductor device is positioned within the package by aligning the first marker with the second marker, and the first and second markers are visible.
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Abstract
A polarized light emitting diode (LED) includes a marker indicating a polarization direction. A package for the LED also includes a marker indicating the polarization direction. The markers on the LED and package are used for mutual alignment, wherein the LED is attached in a favorable orientation with respect to a package, so that the polarization direction of emitted light from the package is apparent. The marker is placed on the LED before die separation and the marker is placed on the package before alignment. The marker on the LED comprises a photolithographic pattern, an asymmetric die shape, a notch on the die, or a scratch on the die, while the marker on the package comprises an electrode shape or pattern, an asymmetric package shape, a notch on the package, or a scratch on the package. Finally, the LED or package may be installed in an external circuit or system that also indicates the polarization direction.
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Citations
14 Claims
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1. A polarized light emitting apparatus, comprising:
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at least one semiconductor device emitting polarized light, wherein the semiconductor device includes at least one first marker indicating a polarization direction for the polarized light emitted by the semiconductor device; and a package for containing the semiconductor device, wherein the package includes at least one second marker indicating a polarization direction for the polarized light emitted by the semiconductor device when contained within the package, the semiconductor device is positioned within the package by aligning the first marker with the second marker, and the first and second markers are visible. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of fabricating a polarized light emitting apparatus, comprising:
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obtaining at least one semiconductor device emitting polarized light, wherein the semiconductor device includes at least one first marker indicating a polarization direction for the polarized light emitted by the semiconductor device; obtaining a package for containing the semiconductor device, wherein the package includes at least one second marker indicating a polarization direction for the polarized light emitted by the semiconductor device when contained within the package; and positioning the semiconductor device within the package by aligning the first marker with the second marker, wherein the first and second markers are visible. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification