Lumileds LLC

Lumileds Holding B.v.

Michael Laughner

Daniel Bernardo Roitman

Prashant Singh

Darren Dunphy

Sujan-Ehsan Wadud

William David Collins, Iii

William Collins

A light emitting device includes an LED having a (e.g., top) light output surface, a ceramic phosphor, and an adhesive layer positioned to attach the top of the LED to the ceramic phosphor. In one embodiment the adhesive layer is composed of multiple separate patches (regions) that define at least one channel therebetween, with the channel being open to an environment to permit oxygen permeation. The adhesive layer can be applied by a patternable dispensing system.

Fabrication for precise line-bond control and gas diffusion between LED components

Devices and techniques are disclosed herein which include a first LED device layer, a second LED device layer, and an adhesive bondline disposed between the first LED device layer and the second LED device layer. The adhesive bondline includes a bondline thickness, a plurality of spacers disposed within the adhesive bondline, and a silicone matrix. The plurality of spacers may have a diameter or a shortest axis between 0.5 and 10 micrometers and the coefficient of variation is 10% or less. The plurality of spacers may be include SiO, alumina, soda lime glass, may be inorganic, or polymeric.

Precise bondline control between LED components

Growing community of inventors

San Jose, CA, United States of America

Michael Laughner