Patterning phosphor layers using polymer masks
AssigneeLumileds LLC
InventorsRonja MISSONG, Jens Meyer, Marinus Johannes Petrus Maria van Gerwen
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Abstract
A method for depositing patterned phosphor films comprises using a patterned polymer film as a mask to block phosphor deposition, or allow subsequent removal of deposited phosphor, from selected areas of a device surface covered by the polymer film. The method generally comprises disposing the patterned polymer film mask on the device, subsequently depositing the phosphor, and then removing the mask and any phosphor deposited on the mask from the device. The polymer film may be deposited in the desired mask pattern or patterned after deposition.
Claims20
A method of depositing a phosphor layer on a light emitting device disposed on a top surface of a substrate, the method comprising:
- disposing a polymer film on areas of the top surface of the substrate around the periphery of the light emitting device, the polymer film not covering a top light emitting surface of the light emitting device;
- depositing phosphor particles on the polymer film and on the top surface of the light emitting device;
- and
- removing the polymer film, and any phosphor particles disposed on it, from the top surface of the substrate without removing phosphor particles disposed on the top surface of the light emitting device.
A method of depositing a phosphor layer on a light emitting device disposed on a top surface of a substrate, the light emitting device comprising an array of LEDs spaced apart from each other by lanes, the method comprising:
- disposing a polymer film on areas of the top surface of the substrate around the periphery of the light emitting device and over the lanes in the array of LEDs, the polymer film not covering top light emitting surfaces of the LEDs;
- depositing phosphor particles on the polymer film and on the top light emitting surfaces of the LEDs;
- and
- removing the polymer film, and any phosphor particles disposed on it, from the top surface of the substrate and from over the lanes in the array of LEDs without removing phosphor particles disposed on the top light emitting surfaces of the LEDs.
A method of depositing phosphors of different types on a light emitting device disposed on a top surface of a substrate, the light emitting device comprising an array of LEDs spaced apart from each other by lanes, the method comprising:
- disposing a first polymer film on areas of the top surface of the substrate around the periphery of the light emitting device, over the lanes in the array of LEDs, and on top light emitting surfaces of a first group of the LEDs, the polymer film not covering top light emitting surfaces of a second group of the LEDs;
- depositing phosphor particles of a first type on the first polymer film and on the top light emitting surfaces of the second group of LEDs;
- removing the first polymer film, and any phosphor particles of the first type disposed on it, from the top surface of the substrate, from over the lanes in the array of LEDs, and from the top light emitting surfaces of the first group of the LEDs without removing phosphor particles of the first type disposed on the top light emitting surfaces of the second group of the LEDs;
- disposing a second polymer film on areas of the top surface of the substrate around the periphery of the light emitting device, over the lanes in the array of LEDs, and over top light emitting surfaces of the second group of the LEDs, the polymer film not covering top light emitting surfaces of the first group of the LEDs;
- depositing phosphor particles of a second type on the second polymer film and on the top light emitting surfaces of the first group of LEDs;
- and
- removing the second polymer film, and any phosphor particles of the second type disposed on it, from the top surface of the substrate and from over the lanes in the array of LEDs without removing phosphor particles of the second type disposed on the top light emitting surfaces of the first group of LEDs.
Dependencies are inferred from the claim text.