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|1. (WO2018105292) SPARK PLUG|
|Applicants:||NGK SPARK PLUG CO., LTD.
In order to provide a spark plug capable of suppressing radio-wave noise, an insulating body has a shaft hole extending in the axial direction, from the tip side to the rear end side thereof. At least part of a center electrode is inserted into the tip side of the shaft hole and at least part of a terminal fitting is inserted into the rear end side of the shaft hole. A connection section: connects the terminal fitting and the center electrode, inside the shaft hole; includes a plurality of magnetic particles comprising both ferrite particles and a conductive substance coating the particles; and has a conductive layer section that the conductive substance for any two magnetic particles among the plurality of magnetic particles comes in contact with. The conductive layer section has a straight line distance from end to end of at least 100 µm and a thickness of at least 2 µm.