Printed wiring board

A printed wiring board, comprising:

• a first insulating layer;
• a first conductor circuit comprising fingerprint authentication circuitry and embedded in the first insulating layer such that the first conductor circuit has an exposed surface exposed and recessed from a surface of the first insulating layer;
• a second insulating layer on which the first insulating layer is formed;
• a second conductor circuit comprising fingerprint authentication circuitry and embedded in the second insulating layer such that the second conductor circuit has an exposed surface exposed from a surface of the second insulating layer and is interposed between the first insulating layer and the second insulating layer;
• and
• a solder resist layer formed on the surface of the first insulating layer such that the solder resist layer is covering the first conductor circuit and that the solder resist layer has a permittivity that is greater than a permittivity of the first insulating layer,
• wherein the first conductor circuit and the second conductor circuit are positioned such that the first conductor circuit and the second conductor circuit are opposing each other across the first insulating layer and that a finger for fingerprint authentication is placed on the solder resist layer, and each of the solder resist layer and the first insulating layer comprises resin material and particles such that the particles in the solder resist layer have a relative permittivity that is higher than a relative permittivity of the particles in the first insulating layer.