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US 11,699,777 B2Granted
Phosphor deposition system for LEDs
AssigneeLumileds LLC
InventorsKenneth John Vampola, Nan Pacella, Amil Patel
Life of this patent
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Abstract
A method to produce a light-emitting device package includes mounting junctions on pads of a metalized substrate, where the junctions are at least partially electrically insulated from each other, and forming wavelength converters, where each wavelength converter is located over a different junction and separated by a gap from neighboring wavelength converters.
Claims13
A method for making a light-emitting device comprising:
- arranging a plurality of semiconductor diodes (LEDs) on a metalized substrate to form a first group of LEDs electrically connected to each other and a second group of LEDs electrically connected to each other, the first and second groups of LEDs forming a LED array;
- performing electrophoretic deposition (EPD) to deposit wavelength converters on the first group of LEDs by applying a first voltage to the first group of LEDs;
- and performing EPD to deposit wavelength converters on the second group of LEDs by applying a second voltage to the second group of LEDs, and further wherein performing EPD to deposit wavelength converters on the first group of LEDs comprises applying a third non-zero voltage to the second group of LEDs.
A method for making a light-emitting device comprising:
- arranging a plurality of LEDs on a metalized substrate to form a first group of LEDs electrically connected to each other and a second group of LEDs electrically connected to each other, the first and second groups of LE Ds forming a LED array;
- performing electrophoretic deposition (EPD) to deposit wavelength converters on the first group of LEDs but not on the second group of LEDs by applying a first voltage to the first group of LEDs, wherein performing EPD to deposit wavelength converters on the first group of LEDs comprises applying a second non-zero voltage to the second group of LEDs.
Dependencies are inferred from the claim text.