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:
Jun. 28, 2011
Filed:
Aug. 21, 2009
Hiroko Takada, Isehara, JP;
Jun Iba, Yokohama, JP;
Hiroko Takada, Isehara, JP;
Jun Iba, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
It aims to improve electron emission efficiency in an electron beam apparatus which includes laminated electron-emitting devices. To achieve this, there are provided an insulating member which has a concave portion on its surface, a cathode which is positioned astride a side surface of the insulating member and an inner surface of the concave portion, a gate which is positioned opposite to the cathode, and a protruding portion which is formed on the gate. In this constitution, the low potential surface of the cathode which is positioned inside the concave portion is inclined to the side of the gate from the entrance toward the interior of the concave portion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile