Conformal gel layers for light emitting diodes
AssigneeCree, Inc.
InventorsMatthew Donofrio, John Adam Edmond, Hua-Shuang Kong
Life of this patent
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Abstract
Light emitting devices include a light emitting diode die on a mounting substrate and a conformal gel layer on the mounting substrate and/or on the light emitting diode die. The conformal gel layer may at least partially fill a gap between the light emitting diode die and the mounting substrate. A phosphor layer and/or a molded dome may be provided on the conformal gel layer. The conformal gel layer may be fabricated by spraying and/or dispensing the gel that is diluted in the solvent.
Claims24
A light emitting device comprising:
- a mounting substrate;
- a light emitting diode die adjacent the mounting substrate to define a gap therebetween;
- and
- a conformal gel layer on the mounting substrate beyond the light emitting diode die and that extends at least partially into the gap, the conformal gel layer including opposing surfaces that both conform to a contour of the mounting substrate.
A light emitting device comprising:
- a mounting substrate;
- a light emitting diode die adjacent the mounting substrate;
- a bond region that connects the light emitting diode die to the mounting substrate and that is recessed from an edge of the light emitting diode die to define a gap;
- a conformal phosphor layer that extends from the mounting substrate, across the gap and onto the light emitting diode die, the conformal phosphor layer including opposing surfaces that both conform to the contour of the mounting substrate and the light emitting diode die;
- and
- a filler in the gap that is configured to prevent the conformal phosphor layer from entering the gap sufficiently to degrade operation of the light emitting device.
A light emitting device comprising:
- a mounting substrate;
- a light emitting diode die on the mounting substrate;
- and
- a conformal gel layer on the mounting substrate beyond the light emitting diode die and that extends at least partially onto the light emitting diode die, the conformal gel layer including opposing surfaces that both conform to a contour of the mounting substrate and the light emitting diode die.
A light emitting device comprising:
- a light emitting diode die;
- and
- a gel layer that is less than about 20 μm thick throughout an extent thereof, on the light emitting diode die.
Dependencies are inferred from the claim text.