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:
Jan. 04, 2011
Filed:
Aug. 09, 2007
Masatsugu Shigeno, Chiba, JP;
Akira Inoue, Chiba, JP;
Masatsugu Shigeno, Chiba, JP;
Akira Inoue, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
An electric potential difference detection method detects an electric potential difference between a surface of a sample and a probe of a cantilever in a scanning probe microscope. An AC voltage having a frequency that is ½ of a resonance frequency of the cantilever is applied between the sample and the cantilever, and a magnitude of an amplitude of vibration of the cantilever is detected. On the basis of the detection, a determination is made as to whether an electric potential difference exists or does not exist between the surface of the sample and the cantilever probe. A determination that an electric potential difference between the surface of the sample and the cantilever probe does not exist is made in a case where the cantilever is resonating and the detected magnitude of the amplitude of vibration of the cantilever is greater than a predetermined magnitude.