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:
Jul. 04, 2006
Filed:
Feb. 13, 2003
James A. Dayton, Jr., Cleveland, OH (US);
James A. Dayton, Jr., Cleveland, OH (US);
GENVAC Aerospace Corporation, Richmond Heights, OH (US);
Abstract
An electron gun () includes an electron multiplier () has a receiving end () for receiving primary electrons and an output end () that emits secondary electrons responsive to primary electrons arriving at the receiving end. An electron emitter () is arranged at the receiving end of the electron multiplier for supplying primary electrons thereto. At least one of an electrical and a magnetic focusing component () is arranged at the open output end of the electron multiplier for focusing the secondary electrons to define an electron beam. In a suitable embodiment, the electron multiplier includes a generally conical substrate () and an electron mirror () including a high secondary electron yield film () disposed on an outer surface of the conical substrate.