| 摘要 |
[Object] To provide a highly reliable, durable heater in which micro-cracks caused by stress concentration resulting from local expansion is suppressed even when a large current flows through a bent portion of the lead, for example, for rapid heating, and a glow plug including the heater. [Solution] A heater 1 of the present invention includes an insulating base 2, a resistor 3 embedded in the insulating base 2, a lead 4 embedded in the insulating base 2. One end of the lead 1 is joined to the resistor 3, and the other end is led out as a terminal portion 5 on the surface of the insulating base 2. The lead 4 in longitudinal section has at least two bent portions 41. The bent portions 41 in cross-section each have an aspect ratio larger than the aspect ratio of the terminal portion 5. |
