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:
Aug. 04, 1998
Filed:
Jun. 28, 1996
Applicant:
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C / ; H01C / ;
U.S. Cl.
CPC ...
338 / ;
Abstract
There is provided a positive characteristics thermistor device having excellent thermal breakdown characteristics. According to the present invention, a positive characteristics thermistor device has a positive characteristics thermistor element 1 and electrodes 2 and 3 formed on principal surfaces of the positive characteristics thermistor element 1. The positive characteristics thermistor element 1 includes an inner region 4 and outer regions 5 and 6 and a porosity occupying rate of the outer regions 5 and 6 is set higher than that of the inner region 4.