Patent ID: 11892676
Assignee: APPLIED MATERIALS, INC.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  F  G

Claim 14:
15. A method, comprising:
disposing a hardmask layer on a mandrel material, the mandrel material disposed on a substrate;
patterning the hardmask layer into a plurality of hardmask structures, the hardmask structures defining exposed portions of the mandrel material, the plurality of hardmask structures including:
a patterned pitch between adjacent hardmask structures, wherein the patterned pitch is from about 200 nm to about 2000 nm; and
a hardmask structure critical dimension from about 50 nm to about 500 nm;

etching the exposed portions of the mandrel material to form a plurality of angled mandrels at a device angle, wherein a shadow distance is defined between a leading edge of the hardmask structures and an etch location where a leading sidewall of each angled mandrel is formed;
removing the hardmask structures;
depositing a device material on the substrate and on a mandrel upper surface, the leading sidewall, and a trailing sidewall of each of the plurality of angled mandrels;
removing the device material disposed on the substrate and the mandrel upper surface of the plurality of angled mandrels with an angled etch process at an etch angle to form a plurality of angled optical device structures at the device angle; and
removing the plurality of angled mandrels between the plurality of angled optical device structures.