| 摘要 |
A heater includes an insulating base body; a resistor embedded in the insulating base body; and a lead embedded in the insulating base body and including one end connected to the resistor, and a terminal portion at another end thereof which is exposed from a surface of the insulating base body. The lead further includes a bent portion bent toward the terminal portion, and an aspect ratio in at least one cross section of the bent portion is larger than an aspect ratio in another cross section of the bent portion, the another cross section being positioned closer to the terminal portion than the at least one cross section of the bent portion.
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