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:
Feb. 13, 1990
Filed:
Nov. 07, 1984
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
3133591 ;
Abstract
An EHD ion source includes an extractor and a control electrode with extractor being disposed below a tip of an electrode, and functioning to apply an electric field to a substance to-be-ionized wetting a pointed end of the tip, so as to derive ions from the pointed tip end. The control electrode is disposed in the vicinity of the pointed end of the tip, and it functions to apply an electric field to the substance to-be-ionized in its molten state so as to supply the pointed tip end with the substance to-be-ionized in a suitable amount. As a result, a great ion current which is substantially proportional to an extracting voltage can be derived from the pointed tip end.