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

Claim 10:
11. A solid-state transducer (SST) device, comprising:
an SST structure configured to emit first emission having a first wavelength;
a converter material structure configured to emit second emission having a second wavelength different from the first wavelength; and
a selective wavelength reflector between the SST structure and the converter material structure, wherein:
the selective wavelength reflector has a refractive index configured to at least substantially reflect the second emission and at least substantially limit reflection of the first 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 SST device has a front side from which the first and second emissions exit the SST device and a back side facing away from the front side;
the converter material structure comprises a plurality of converter materials proximate the front side of the SST device with respect to the SST structure, the converter materials of the plurality being configured to emit emission with successively shorter wavelengths as the converter materials of the plurality are positioned closer to the front side of the SST device;
the selective wavelength reflector is a first selective wavelength reflector; and
the SST device further comprises:
a plurality of second selective wavelength reflectors between adjacent converter materials of the plurality, each second selective wavelength reflector having a second refractive index configured to at least substantially reflect emission of the overlying converter material(s) and at least substantially limit reflection of emission of the underlying converter material(s).