Patent ID: 11967489
Assignee: APPLIED MATERIALS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method of patterning a substrate, comprising:
providing the substrate, wherein a main surface of the substrate defines a substrate plane, wherein the substrate comprises a grating layer and a base layer, subjacent the grating layer;
generating a plasma in a plasma chamber, adjacent to the substrate; and
applying an extraction voltage to an extraction assembly, adjacent the plasma chamber, the extraction assembly comprising at least two electrodes, wherein a first electrode is disposed immediately adjacent a side of the plasma chamber, the side of the plasma chamber defining a first plane, wherein a second electrode defines a vertical displacement from the first electrode along a first direction, perpendicular to the first plane, wherein the at least two electrodes define an angled extraction tunnel, disposed at a non-zero angle of inclination with respect to a perpendicular to the substrate plane,
wherein an angled ion beam is extracted from the extraction assembly, the angled ion beam defining a non-zero angle of incidence with respect to the substrate plane,
wherein the angled ion beam etches the grating layer to form an angled grating; and
wherein each of the first electrode and the second electrode have a staggered shape, and each electrode comprising an upper portion, an angled portion, and a lower portion, the upper portion and the lower portion being parallel to the first plane, wherein the angled portion is located between the upper portion and the lower portion with respect to the second direction, and wherein the lower portion and the angled portion are integral and continuous with one another.