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:
Sep. 11, 2012
Filed:
Dec. 18, 2007
Minoru Yamazaki, Hitachinaka, JP;
Akira Ikegami, Mito, JP;
Hideyuki Kazumi, Hitachinaka, JP;
Osamu Nasu, Hitachinaka, JP;
Minoru Yamazaki, Hitachinaka, JP;
Akira Ikegami, Mito, JP;
Hideyuki Kazumi, Hitachinaka, JP;
Osamu Nasu, Hitachinaka, JP;
Hitachi High-Technologies Corporation, Tokyo, JP;
Abstract
In a method and apparatus for measuring a potential on a surface of a sample using a charged particle beam while restraining a change in the potential on the sample induced by the charged particle beam application, or detecting a compensation value for a change in a condition for the apparatus caused by the sample being electrically charged, a voltage is applied to a sample such that a charged particle beam does not reach the sample (referred to as 'mirror state') when the charged particle beam is applied toward the sample. Information is detected, relating to a potential on the sample using signals obtained by the voltage application.