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:
Jul. 28, 2009
Filed:
Jul. 12, 2006
Applicants:
Katsuhiko Kawashima, Hyogo, JP;
Masahiro Maeda, Osaka, JP;
Keiichi Murayama, Toyama, JP;
Hirotaka Miyamoto, Toyama, JP;
Inventors:
Katsuhiko Kawashima, Hyogo, JP;
Masahiro Maeda, Osaka, JP;
Keiichi Murayama, Toyama, JP;
Hirotaka Miyamoto, Toyama, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/737 (2006.01);
U.S. Cl.
CPC ...
Abstract
A base mesa finger (an emitter ledge layer, a base layer, and a collector layer) is interposed between two collector fingers (collector electrodes), and on the base mesa finger, a base finger (a base electrode) and two emitter fingers (an emitter layerand an emitter electrode) on both sides of the base finger, are formed. The two emitter fingers are formed symmetric with respect to the base finger as a reference.