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:
Apr. 07, 1981
Filed:
May. 07, 1979
U.S. Philips Corporation, New York, NY (US);
Abstract
A device for directing electrically charged particles towards a target present on a connection place of a support comprises an electrostatic deflection system having deflection plates for controlling a beam of charged particles in two mutually perpendicular directions towards the target with the deflection plates being brought at a desired voltage by means of an electronic control system, and two juxtaposed rods of electrically conductive material being provided on oppositely located sides of the target with the rods being each connected by a resistor to a fixed potential and being furthermore connected to a control device which reacts to a voltage which arises across the resistors if the beam of electrically charged particles impinges on a rod and which, if the beam, during each stroke across the target, impinges on a combination of rods other than the two innermost rods, produces a correction voltage for the control of the deflection plates.