The front surface of the base material has a mounting area on which a mounted component is to be mounted. The wiring board further comprises a regulation part composed of a groove or a projection disposed for the front surface of the base material or a combination thereof. Abstract: To provide a wiring board capable of suppressing flowing of a bonding material into a mounting area while maintaining a bonding area between a base material and a frame body.SOLUTION: A wiring board according to one aspect of the present disclosure comprises: a metal-made base material having a front surface and a back surface and an insulative frame body bonded to the front surface of the base material with a bonding layer made of a bonding material interposed therebetween.
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