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US 2012/0068208 A1Published application
Micro-structure phosphor coating
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsChi Xiang TSENG, Hsiao-Wen LEE
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Abstract
An optical emitter includes micro-structure phosphor coating on a light-emitting diode die mounted on a package substrate. The micro-structures are transferred onto a micro-structure phosphor coating precursor by patterning and curing the precursor or by curing the precursor through a mold. The micro-structures are half spheroids, three-sided pyramids, or six-sided pyramids.
Claims20
An optical emitter comprising:
- a package substrate;
- a light-emitting diode (LED) die mounted on the package substrate, the LED die comprising an LED;
- a layer of micro-structure phosphor coating on a surface of the LED die opposite from the package substrate;
- and
- a lens over the layer of micro-structure phosphor coating and the LED die, the lens attached to the package substrate.
2 more elements
A method of fabricating an optical emitter, comprising:
- attaching a light-emitting diode (LED) die to a package substrate;
- electrically connecting the LED die and the package substrate;
- applying a micro-structure phosphor coating precursor on the LED die, wherein the micro-structure phosphor coating comprises ultraviolet (UV) gel or thermal gel;
- applying a micro-structure phosphor mold over the micro-structure phosphor coating precursor on the LED die to transfer a plurality of micro-structures onto the micro-structure phosphor coating precursor;
- curing a micro-structure phosphor coating;
- and,
- removing the micro-structure phosphor mold.
4 more elements
A method of fabricating an optical emitter, comprising:
- attaching a light-emitting diode (LED) die to a package substrate;
- electrically connecting the LED die and the package substrate;
- applying a micro-structure phosphor coating precursor on the LED die;
- patterning a plurality of micro-structure features on the micro-structure phosphor coating precursor through a micro-structures photomask;
- removing un-patterned portions of the micro-structure phosphor coating precursor;
- and,
- curing a patterned portion of the micro-structure phosphor coating precursor to form micro-structures.
4 more elements
Dependencies are inferred from the claim text.