Meta Platforms Technologies, LLC

Pasqual Rivera

Siddharth Buddhiraju

Richard Farrell

Keith Rozenburg

Anneli Munkholm

Jilin Yang

Disclosed herein are techniques for waveguide displays. According to some embodiments, a method for fabricating a multi-layer optical device comprising includes measuring thickness variations within a target area of a first substrate for fabricating a first optical element of the multi-layer optical device and determining, based on the measuring, a thickness correction map indicating amounts of material to be removed in different regions of the target area to planarize the target area. The method also includes planarizing the target area of the first substrate based on the thickness correction map and bonding the first substrate to a second substrate that comprises a second optical element fabricated thereon to form a layer stack, wherein the target area of the first substrate aligns with and is bonded to the second optical element to form a multi-layer structure. The method further includes singulating the multi-layer structure from the layer stack.

Methods for correcting substrate thickness variation for waveguide applications

A waveguide display includes a waveguide configured to transport display light visible to human eyes, a coupler formed on a broadside surface of the waveguide and configured to couple portions of the display light out of the waveguide at one or more regions of the waveguide, and a photovoltaic device at an edge of the waveguide, the photovoltaic device configured to convert at least a portion of the display light that reaches the edge of the waveguide into electrical power.

Growing community of inventors

Woodinville, WA, United States of America

Pasqual Rivera