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:
Feb. 15, 1994
Filed:
Oct. 16, 1992
Andrew R Walker, Prestbury, GB;
Simon C Page, Hadfield, GB;
Kratos Analytical Limited, Urmston, GB;
Abstract
A charged particle energy analyser has a magnetic lens such as a snorkel-type lens and a source for directing ionising radiation onto a specimen causing charged particles to be emitted from its surface. The specimen is immersed in the magnetic imaging field of the magnetic lens so that particles having energies in a predetermined energy range are brought to a focus, the energies of the focussed particles being analysed by an energy analyser. An electrode arrangement is provided for enabling the magnetic imaging field of the magnetic lens to utilise unfocussed particles to cause charge neutralisation of the specimen. Alternatively, charged particles from a source are subjected to an electric field which is transverse to the optical axis of the magnetic lens and are guided onto the specimen by the magnetic imaging field of the magnetic lens.