Patent ID: 11908978
Assignee: MICRON TECHNOLOGY, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A light emitting diode (LED) device, comprising:
an LED structure configured to emit first light having a first wavelength;
an emitter configured to emit second light having a second wavelength different from the first wavelength; and
a selective wavelength reflector having a front surface facing a front side of the LED device from which the first and second light exit the LED device, and a back surface facing a back side of the LED device opposite to the front side, the LED structure being at the back surface and the emitter being at the front surface, wherein:
the selective wavelength reflector is configured to at least substantially transmit the first light and at least substantially reflect the second light; and

the selective wavelength reflector includes a multilayer stack of materials comprising layers of silicon dioxide (SiO2), titanium dioxide (TiO2), and alloys thereof, two TiO2 layers of the multilayer stack being separated by a SiO2 layer and at least one alloy layer,
wherein the LED structure is configured to emit blue light;
wherein the emitter is a first converter material configured to emit red light;
wherein the selective wavelength reflector is a first selective wavelength reflector configured to at least substantially transmit the blue light and at least substantially reflect the red light and green light toward the front side of the LED device; and
wherein the LED device further comprises:
a second converter material proximate the front side of the LED device with respect to the first converter material, the second converter material being configured to emit the green light; and
a second selective wavelength reflector between the first and second converter materials, wherein the second selective wavelength reflector is configured to at least substantially transmit the blue and red light and at least substantially reflect the green light toward the front side of the LED device.