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

Claim 1:
2. A solid-state transducer (SST) device, comprising:
a first emitter configured to emit first emission having a first wavelength;
a second emitter configured to emit second emission having a second wavelength different from the first wavelength; and
a selective wavelength reflector having a front surface facing a front side of the SST device from which the first and second emissions exit the SST device, and a back surface facing a back side of the SST device opposite to the front side, the first emitter being at the back surface and the second emitter being at the front surface, wherein:
the selective wavelength reflector is configured to at least substantially transmit the first emission and at least substantially reflect the second emission; 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 first emitter is an SST structure configured to emit blue light;
wherein the second 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 SST device; and
wherein the SST device further comprises:
a second converter material proximate the front side of the SST 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 SST device.