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. 07, 2010
Filed:
Feb. 27, 2008
Eiichi Seya, Hitachinaka, JP;
Takashi Nagamatsu, Hitachinaka, JP;
Eiichi Seya, Hitachinaka, JP;
Takashi Nagamatsu, Hitachinaka, JP;
Hitachi High-Technologies Corporation, Tokyo, JP;
Abstract
An electron microscope stage mechanism capable of performing high-accuracy positioning while limiting vibration and drift. An ultrasonic motor is used in a stage drive mechanism, and a fixing mechanism capable of increasing stop stiffness is combined integrally with the motor. That is, a structure in which a piezoelectric actuator of the fixing mechanism is mounted in a pre-load mechanism together with the ultrasonic motor is used. When the stage is fixed by the fixing mechanism after acceleration, deceleration and positioning of the stage performed by the drive mechanism, the piezoelectric actuators positioned on opposite sides of the stage are extended to press the stage.