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. 02, 1985
Filed:
Jan. 11, 1983
Applicant:
Inventors:
Pierre Boissel, Courbevoie, FR;
Mathias Tong, Courbevoie, FR;
Assignee:
Cameca, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
2503 / ; 250310 ; 2505051 ;
Abstract
The electronic optical apparatus provided is such that the parts situated in the immediate vicinity of the beam, anode, screen placed inside the condenser block, screen formed from a tube and limiter diaphragms inside the deflection block, screen placed between the final focussing lens and the sample to be observed and the secondary electron collector electrode have their faces exposed to the electron beam formed from pyrolytic graphite.