Patent ID: 11952656
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 15:
16. A physical vapor deposition (PVD) system, comprising:
a pedestal configured to hold a semiconductor wafer;
a cover plate configured to hold a target; and
a collimator between the pedestal and the cover plate, wherein the collimator is configured to pass source material travelling from the cover plate toward the pedestal at an angle less than a threshold angle with respect to a line perpendicular to a surface of the pedestal facing the cover plate, wherein the collimator is configured to block source material travelling from the cover plate toward the pedestal at an angle greater than the threshold angle, wherein at least a portion of the collimator has a cross sectional shape defined by a first rectangle from which a central trapezoid portion of the first rectangle has been subtracted to form a cutout.