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. 16, 1991
Filed:
Apr. 10, 1990
Applicant:
Inventor:
Albert V Crewe, Palos Park, IL (US);
Assignee:
Orchid One Corporation, Palos Hills, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
2503 / ; 2503 / ;
Abstract
A high performance, vacuum compatible electromagnetic electron lens coil for electron beam systems has reduced gaseous emissions and improved heat dissipation capability. It comprises a wound coil of electrically conductive wire sheathed in a selected thermoplastic resin insulator. The wire insulator is coated with a hermetic layer of low vapor pressure metal. The low vapor pressure and hermetic sealing properties of the layer provide ultra high vacuum compatibility of the coil. The high thermal conduction property of the layer provides high heat dissipation capability and therefore permits high current densities in the coil.