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. 11, 2006
Filed:
Mar. 16, 2004
Kenjiro Mihara, Yokaichi, JP;
Hideaki Niimi, Hikone, JP;
Kenjiro Mihara, Yokaichi, JP;
Hideaki Niimi, Hikone, JP;
Murata Manufacturing Co, Ltd., Kyoto, JP;
Abstract
A positive temperature coefficient thermistor has a non-heating portion which is not heated when a voltage is applied between first and second internal electrodes. The non-heating portion is provided in the approximate center of the positive temperature coefficient thermistor and is arranged to extend along a direction that is substantially perpendicular to a lamination direction of the positive temperature coefficient thermistor. The non-heating portion is arranged at least in the approximate center in the lamination direction of the portion of the laminate where the first and the second internal electrodes are arranged. Thus, a hot spot is reliably prevented from occurring inside the laminate when voltage is applied. As a result, the withstand voltage property is greatly improved. The non-heating portion may include a cavity provided in at least one thermistor layer or an opening or cut portion provided in the internal electrode.