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:
Aug. 01, 1995
Filed:
Jun. 10, 1994
Hilton F Glavish, Incline Village, NV (US);
Michael A Guerra, late of Exeter, NH (US);
Tadashi Kawai, Kyoto, JP;
Masao Naito, Kyoto, JP;
Nobuo Nagai, Kyoto, JP;
Nissin Electric Company, Kyoto, JP;
Abstract
A magnetic deflection system for scanning an ion beam over a selected surface comprising: a magnetic structure having poles with respective scanning coils and respective pole faces that define therebetween a gap through which the ion beam passes; a primary current source coupled to the scanning coils adapted to apply to the scanning coils an excitation current to generate a substantially unipolar oscillatory magnetic field in the gap that alternates in polarity as a function of time to cause scanning of the ion beam, the substantially unipolar magnetic field having a magnitude sufficiently greater than zero to prevent the transverse cross-section of the ion beam from substantially fluctuating in size while the ion beam is being scanned across the selected surface.