Light-emitting dies incorporating wavelength-conversion materials and related methods

摘要

In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., freestanding white light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder.

主权项

1. A method of forming a composite wafer comprising a plurality of discrete semiconductor dies suspended in a cured polymeric binder, the method comprising:
disposing the plurality of discrete semiconductor dies on a mold substrate, each semiconductor die (i) having two spaced-apart contacts adjacent the mold substrate, (ii) being spaced away from one or more neighboring semiconductor dies, and (iii) being a bare-die light-emitting element; coating the plurality of semiconductor dies with a polymeric binder, curing the polymeric binder to form the composite wafer; and forming one or more electrically conductive layers over at least a portion of a first face of the polymeric binder and at least a portion of each of the two spaced-apart contacts of each semiconductor die, wherein (i) the polymeric binder is transparent to a wavelength of light emitted by the semiconductor dies, (ii) the polymeric binder contains a wavelength-conversion material for absorption of at least a portion of light emitted from the semiconductor dies and emission of converted light having a different wavelength, converted light and unconverted light emitted by the semiconductor dies combining to form mixed light, and (iii) for each semiconductor die, the two spaced-apart contacts are electrically coupled to the one or more conductive layers.