Patent ID: 11886111
Assignee: APPLIED MATERIALS, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A substrate, comprising:
a plurality of inactive areas;
a plurality of eyepiece areas disposed between the plurality of inactive areas, wherein each eyepiece area includes a target thickness distribution across each of the plurality of eyepiece areas, the target thickness distribution defined by a distance between a top surface and a bottom surface of the substrate at each of the plurality of eyepiece areas; and
an optical device formed at each of the plurality of eyepiece areas, each optical device having a plurality of optical device structures formed in the substrate or an index matching layer, wherein depths of at least two of the optical device structures in the substrate or index matching layer are different, the depths in the index matching layer corresponding to the target thickness distribution.