Lumileds LLC

Jacques Heuts

Marcel Rene Bohmer

Peter Josef Schmidt

Ken Shimizu

A method of fabricating closely spaced pcLEDs () arranged in a matrix array () of perpendicular rows and columns comprises an initial phosphor deposition step in which phosphor () is deposited at alternating locations (pixels) in the matrix array in a checkerboard pattern, so that the locations () in the array at which phosphor () is deposited are not adjacent to each other. In a subsequent phosphor deposition step phosphor is deposited at the alternating locations at which phosphor was not deposited in the first deposition step. In between the two phosphor deposition steps, reflective or scattering structures () may be fabricated on sidewalls of the phosphor pixels to optically isolate pcLEDs in the resulting array from each other.

Two step phosphor deposition to make a matrix array

Methods of manufacturing a wavelength-converting pixel array structure, methods of manufacturing a light-emitting device and light-emitting devices are described. A method of manufacturing a wavelength-converting pixel array structure includes forming, in a recess in a wafer, an array of photoresist blocks separated by gaps. A liquid precursor filler material is dispensed into the recess to fill the gaps with the liquid precursor filler material to form a grid. The photoresist blocks are removed to expose an array of cavities defined by walls in the grid. Each of the cavities is filled with a wavelength-converting material to form wavelength-converting pixels of the wavelength-converting pixel array structure.

Method of manufacturing a wavelength-converting pixel array structure

A method of fabricating closely spaced pcLEDs arranged in a matrix array of perpendicular rows and columns comprises an initial phosphor deposition step in which phosphor is deposited at alternating locations (pixels) in the matrix array in a checkerboard pattern, so that the locations in the array at which phosphor is deposited are not adjacent to each other. In a subsequent phosphor deposition step phosphor is deposited at the alternating locations at which phosphor was not deposited in the first deposition step. In between the two phosphor deposition steps, reflective or scattering structures may be fabricated on sidewalls of the phosphor pixels to optically isolate pcLEDs in the resulting array from each other.

Growing community of inventors

Roermond, Netherlands

Jacques Heuts