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. 14, 1987
Filed:
Apr. 08, 1986
Charles E Bryson, III, Palo Alto, CA (US);
Douglas L Jones, Aloha, OR (US);
Kevex Corporation, Foster City, CA (US);
Abstract
An electron spectroscopy system is disclosed which is specially suited for chemical analysis of electrically isolated specimens. X-rays or other ionizing radiation is focused to a relatively small spot on the surface of the electrically isolated sample to be analyzed. An electron energy analyzer has its input optics focused such that the input field of view of the electron energy analyzer is coincident with the beam spot produced by the focused beam of ionizing radiation on the specimen so as to capture secondary photoelectrons emitted from the surface of the sample under analysis. The energies of the secondary photoelectrons are analyzed to obtain a spectrum of the constituents of the surface of the sample under analysis. A flood beam of relatively low energy electrons is directed onto the surface of the sample for neutralizing the positive surface charge in the region of the beam spot. An electrically conductive grid is positioned in closely spaced relationship to the surface of the sample for smoothing the gradients in the electrical potential in the region of the beam spot, thereby improving the resolution of the secondary photoelectron energy spectrum obtained from the sample under analysis.