| 摘要 |
An ignition coil includes a primary coil and a secondary coil, a magnetic member through which a magnetic flux generated by the primary coil and the secondary coil passes, a resin case for accommodating therein the magnetic member, the primary coil and the secondary coil, and an insulating resin for filling the resin case. The magnetic member is formed by compression molding of a green compact material using iron-based powder including an insulating coating. In the ignition coil, the green compact material contains 50% by weight or more of the iron-based powder having a particle size about in a range of 150 mum to 300 mum. Alternatively, the green compact material has a content of a binder being 0.15% by weight or less.
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