Patent ID: 9711329
Date: 2017-07-18
CPC Classifications: H01J

Claim:
1. An ion implantation system for optimizing a scan width on a workpiece, comprising: an ion source; an extraction aperture configured to extract a spot ion beam from the ion source; a mass resolving apparatus positioned downstream of the extraction aperture, wherein the mass resolving apparatus is configured to mass analyze the spot ion beam; an ion beam scanning apparatus positioned along a path of the spot ion beam, wherein the ion beam scanning apparatus is configured to reciprocally scan the spot ion beam in a fast scan direction, therein defining a ribbon ion beam having a ribbon beam width; a workpiece scanning apparatus having a workpiece mount configured to selectively secure the workpiece, wherein the workpiece scanning apparatus is configured for translate the workpiece through the ribbon ion beam; a dosimetry system positioned downstream of the workpiece mount, wherein the dosimetry system comprises a tuning Faraday configured to measure a beam current of the ribbon ion beam; and a control system configured for tuning the ion beam to optimize the scan width based, at least in part, on the beam current measured by the dosimetry system.