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

  • US 8,759,125 B2
  • Filed: 01/24/2013
  • Issued: 06/24/2014
  • Est. Priority Date: 01/24/2012
  • Status: Active Grant
First Claim
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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 at least 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; and

    curing the polymeric binder to form the composite wafer,wherein the contacts of each semiconductor die remain at least partially uncoated by the polymeric binder, and wherein (i) the polymeric binder is transparent to a wavelength of light emitted by the semiconductor dies, and (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 and unconverted light emitted by the semiconductor dies combining to form substantially white light having a correlated color temperature in the range of 2000K to 10,000K.

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