Thermistor element and manufacturing method therefor

A method for manufacturing a thermistor element including:

• an element body made of a ceramic and including first and second end surfaces opposite to each other and a peripheral surface located between the first end surface and the second end surface;
• a first external electrode covering the first end surface and a portion of the peripheral surface adjacent to or in a vicinity of the first end surface;
• and
• a second external electrode covering the second end surface and a portion of the peripheral surface adjacent to or in a vicinity of the second end surface,
• the method comprising:
• an element body preparation step of preparing the element body;
• and
• an external electrode preparation step of preparing the first external electrode and the second external electrode;
• wherein
• the external electrode preparation step further includes an underlayer formation step of further forming underlayers;
• the underlayer formation step includes forming two second external electrode side corner portions, which are thin and adjacent to each other, of the underlayer of the first external electrode adjacent to or in a vicinity of the second external electrode, and forming two first external electrode side corner portions, which are thin and adjacent to each other, of the underlayer of the second external electrode adjacent to or in a vicinity of the first external electrode;
• and
• the external electrode preparation step further includes forming uppermost layers that cover each of the respective first and second external electrode side corner portions.