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. 21, 2003
Filed:
Jan. 06, 2000
Applicant:
Inventors:
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 2/702 ;
U.S. Cl.
CPC ...
H01J 2/702 ;
Abstract
A gallium ion source including a needle electrode, a reservoir for storing gallium, and a wire heater for heating the needle electrode and the reservoir. The needle electrode, the reservoir and the gallium stored in the reservoir have total heat capacity of not less than 0.015 J/K and not higher than 0.1 J/K. The needle electrode and reservoir of the gallium ion source may have a total heat capacity of 0.015 J/K to 0.1K and the initial amount of gallium is 0.004-0.10 g, The wire heater may have a diameter of 0.10-0.20 mm and a length of 8-30 mm, and may be in a V shape with a bend angle of 40°-90°.