Patent ID: 11867946
Assignee: POET TECHNOLOGIES, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An assembly comprising
a substrate;
wherein a functionality of the substrate is susceptible to be degraded at temperatures greater than 400 C,

a waveguide on the substrate,
wherein the waveguide comprises a stack of two or more SiON layers,
wherein the two or more SiON layers comprise at least two layers having different indexes of refraction,
wherein the processes to completely form the waveguide are limited to temperatures less than or equal to 400 C,

wherein the waveguide further comprises at least one of
a buffer layer comprising SiON disposed under the stack of the SiON layers,
one or more SiON bottom spacer layers disposed under the stack of the SiON layers,
one or more SiON top spacer layers disposed on the stack of the SiON layers, or
a SiON top layer disposed on the stack of the SiON layers.