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:
Oct. 10, 1995
Filed:
Feb. 09, 1993
Shuhei Nakata, Amagasaki, JP;
Hirofumi Tanaka, Amagasaki, JP;
Itsuo Kodera, Amagasaki, JP;
Tetsuya Nakanishi, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An ion removing device includes an ion inducing electrode provided in a vacuum container in a deflection portion of an electron accumulating ring along an inner peripheral wall of the vacuum container, an ion removing electrode provided in the vacuum container near each of ports of the defection portion of the electron accumulating ring, and a power source for applying a voltage to both the ion inducing electrode and the ion removing electrodes. An ion removing method includes the steps of inducing ions trapped by a potential generated by an electron beam to ports of a deflection portion of an electron accumulating ring by forming an electric field in a vacuum container in the deflection portion, and removing the ions which have been inducted to the ports of the defection portion. An electron accumulating ring includes a vacuum container for retaining electrons in a vacuum, a deflection electromagnet provided around the vacuum container located in a deflection portion for generating a magnetic field to deflect an electron beam, an ion inducing electrode provided in the vacuum container located in the deflection portion along an inner peripheral wall of the vacuum container, an ion removing electrode provided in the vacuum container at each of ports of the deflection portion, and a power source for applying a voltage to both the ion inducing electrode and the ion removing electrodes.