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:
Sep. 27, 2016
Filed:
Nov. 07, 2013
Panasonic Corporation, Osaka, JP;
Imec Vzw, Leuven, BE;
Hiroki Takeuchi, Osaka, JP;
Vladimir Leonov, Leuven, BE;
PANASONIC CORPORATION, Osaka, JP;
IMEC vzw, Leuven, BE;
Abstract
In an electret elementincluding a substrate, an electrically-conductive electrode, and an electret layerincluding a first dielectric layerand a second dielectric layer, when electrical charge charged in the electret layeris negative, a bottom Ec of conductive band of the second dielectric layeris lower than a bottom Ec of the first dielectric layer, and when the electrical charge is positive, a top Ev of valence band of the second dielectric layeris higher than a top Ev of the first dielectric layer; and a concave portionis formed in a surface of the first dielectric layer; and the second dielectric layeris formed to cover the entire of the bottom faceand at least a part of the side wallof the concave portion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile