Light-extraction films for light-emitting diode devices and related methods

Abstract

Light-emitting diode (LED) devices and more particularly light-extraction films for LED devices and related methods are disclosed. Light-extraction films include functionalized materials with shapes, structures, and/or characteristics configured to promote increased light-extraction through light-emitting faces of LED chips. Exemplary shapes include thin films, such as generally two-dimensional films, with thicknesses that vary across light-emitting faces of LED chips. Exemplary structures include intentionally defective films that include distributions of cracks and/or voids. Exemplary characteristics include indexes of refractions that are intermediate the LED chip and encapsulants of LED packages. Related methods include forming light-extraction films after LED chip fabrication and singulation, either at the LED chip level or at the LED package level.

Dependencies are inferred from the claim text.