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

Claim 0:
1. 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 includes an SST structure having a first semiconductor material comprising N-type gallium nitride (N-GaN), a second semiconductor material comprising a P-type gallium nitride (P-GaN), and an active region comprising indium gallium nitride (InGaN), the active region being between the first and second semiconductor materials;
wherein the SST structure is configured to emit blue light;
wherein the second emitter includes a converter material configured to emit yellow light; and
wherein the selective wavelength reflector is configured to at least substantially transmit the blue light and at least substantially reflect the yellow light.