Patent ID: 11948792
Assignee: CORNING INCORPORATED
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 14:
15. A glass wafer for a semiconductor device, comprising:
a glass substrate comprising: a top surface, a bottom surface opposing the top surface, and an edge surface between the top surface and the bottom surface; and
a silicon containing coating disposed on the glass substrate, wherein the silicon containing coating comprises a layer of silicon nitride, a layer of undoped amorphous silicon, a layer of silicon dioxide, and a phosphorus-doped crystalline silicon layer, wherein the layer of silicon nitride is disposed atop the layer of undoped amorphous silicon,
wherein the layer of undoped amorphous silicon is disposed atop the layer of silicon dioxide,
wherein the layer of silicon dioxide is disposed atop the phosphorus-doped crystalline silicon layer, and
wherein a difference in refractive index values between the layer of silicon nitride and the layer of undoped amorphous silicon is greater than 0.5, and a difference in refractive index values between the layer of undoped amorphous silicon and the layer of silicon dioxide is greater than 0.5.