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:
Oct. 11, 2011
Filed:
Feb. 17, 2010
Tadamasa Miura, Yasu, JP;
Tadamasa Miura, Yasu, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Abstract
A NTC thermistor which has superior linearity of resistance-temperature characteristic is provided without depending on a combination of two or more kinds of material but with a single semi-conductive ceramic material. As the semi-conductive ceramic material of negative resistance-temperature characteristic is a ceramic body constituting a NTC thermistor being an oxide expressed by the formula AMnOin which y is 0.8 to 1.6, A is a combination of rare earth element and barium and the content of barium in A is 60 to 75 mol % when y=0.8 to 1.5, and 50 to 63 mol % y=1.7 to 2.3, and z is a value which maintains the electric neutrality of the oxide. A preferable oxide is of the formula (LaBa)MnOin which when y=0.8 to 1.5, 0.60≦α≦0.75, and when y=1.7 to 2.3, 0.50≦α≦0.63.