公开(公告)号：US20220301748A1

公开(公告)日：2022-09-22

申请号：US17635841

申请日：2020-09-28

Applicant: TDK CORPORATION

Inventor： Daisuke TSUCHIDA ,  Takehiko ABE ,  Yoshihiko SATOH ,  Koki YAMADA

IPC: H01C1/14 ,  H01C7/04

Abstract: An NTC thermistor element is of less than 0402 size. A first internal electrode is connected to a first external electrode. A second internal electrode is separated from the first internal electrode and is connected to a second external electrode. A third internal electrode opposes the first and second internal electrodes and is not connected to the first external electrode and the second external electrode. 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, and are less than or equal to ¼ the thickness of the thermistor body.

公开(公告)号：US20220301749A1

公开(公告)日：2022-09-22

申请号：US17636217

申请日：2020-11-27

Applicant: TDK CORPORATION

Inventor： Daisuke TSUCHIDA ,  Takehiko ABE ,  Yoshihiko SATOH ,  Shingo YASUDA ,  Yuki IKEDA ,  Makikazu TAKEHANA

IPC: H01C7/04 ,  H01C1/14 ,  H01C1/148

Abstract: An NTC thermistor element includes a thermistor body and a plurality of internal electrodes disposed in the thermistor body and opposing each other. The thermistor body includes a region interposed between adjacent internal electrodes of the plurality of internal electrodes. The region of the thermistor body includes a plurality of crystal grains arranged in succession between the internal electrodes adjacent to each other. The plurality of crystal grains include a first crystal grain, a second crystal grain, and a third crystal grain. The first crystal grain is in contact with one internal electrode of the internal electrodes adjacent to each other. The second crystal grain is in contact with another internal electrode of the internal electrodes adjacent to each other. The third crystal grain is not in contact with the first crystal grain and the second crystal grain.