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. 31, 1993
Filed:
Nov. 25, 1992
Applicant:
Inventors:
Noel A Martin, McMinnville, OR (US);
Robert L Gerlach, Portland, OR (US);
Assignee:
FEI Company, Beaverton, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2503 / ; 3133601 ; 3133611 ;
Abstract
A precision electrostatic lens system is formed from lens electrodes having high precision inner bores by aligning said bores on a ceramic rod, inserting segmented glass spacers between adjacent electrodes, and brazing the combination together to provide a monolithic structure capable of maintaining accurate tolerances.