US 11,791,070 B2
NTC thermistor element
Daisuke Tsuchida, Tokyo (JP); Takehiko Abe, Tokyo (JP); Yoshihiko Satoh, Tokyo (JP); and Koki Yamada, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 17/635,841
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed Sep. 28, 2020, PCT No. PCT/JP2020/036658
§ 371(c)(1), (2) Date Feb. 16, 2022,
PCT Pub. No. WO2021/065807, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-182346 (JP), filed on Oct. 2, 2019.
Prior Publication US 2022/0301748 A1, Sep. 22, 2022
Int. Cl. H01C 1/14 (2006.01); H01C 7/04 (2006.01)
CPC H01C 1/1413 (2013.01) [H01C 7/041 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An NTC thermistor element comprising:
a thermistor body;
a first external electrode disposed on one end of the thermistor body;
a second external electrode disposed on another end of the thermistor body; and
a plurality of internal electrodes disposed in the thermistor body,
wherein the plurality of internal electrodes include:
a first internal electrode connected to the first external electrode;
a second internal electrode separated from the first internal electrode in a first direction in which the first external electrode and the second external electrode oppose each other with the thermistor body interposed therebetween, and connected to the second external electrode; and
a third internal electrode opposing the first internal electrode and the second internal electrode, and not connected to the first external electrode and the second external electrode,
wherein a shortest distance between the first internal electrode and the third internal electrode and a shortest distance between the second internal electrode and the third internal electrode are smaller than:
a shortest distance between the first internal electrode and the second internal electrode,
a shortest distance between the first external electrode and the third internal electrode, and
a shortest distance between the second external electrode and the third internal electrode,
wherein the shortest distance between the first internal electrode and the third internal electrode and the shortest distance between the second internal electrode and the third internal electrode are less than or equal to ¼ a thickness of the thermistor body in a second direction in which the first and second internal electrodes and the third internal electrode oppose each other, and
wherein the NTC thermistor element is of less than 0402 size.