The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 2006
Filed:
Mar. 24, 2004
Nicholas R. White, Manchester, MA (US);
Nicholas R. White, Manchester, MA (US);
Other;
Abstract
In system for implanting workpieces with an accurately parallel scanned ion beam, a fine-control collimator construct is used to reduce the deviation of the scanned ion beam from a specified axis of parallelism and thereby improve its collimation. The shape of the fine-control collimator matches the ribbon shape of the beam and correction of parallelism in two orthogonal directions is possible. Measurement of the non-parallelism is accomplished by sampling the scanned beam in two planes and comparing timing information; and such measurement is calibrated to the orientation of the workpiece in the plane where ion implantation occurs. Measurement of non-uniformity in the doping profile is accomplished using the same means; and the scan waveform is adjusted to substantially remove any non-uniformity in the doping profile.