| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board which is unlikely to be damaged at the time of bending.SOLUTION: A circuit board 10 comprises a substrate body 12 in which a plurality of flexible base material layers 18 are laminated in a z-axis direction and which extends in an x-axis direction. The substrate body 12 includes: a first part P1 which has at least a principal surface S1 provided on a z-axis negative direction side and a principal surface S2 provided in a z-axis positive direction side; a second part P2 which has at least a principal surface S3 provided in the z-axis negative direction side and a principal surface S4 provided on the z-axis positive direction side, and which is connected to one end of the first part P1 along the x-axis direction and has a thickness in the z-axis direction is thicker than that of the first part P1; and a first connection surface Sc1 which is at least one first connection surface Sc1 for connecting the principal surface S1 and the principal surface S3, and has a curved surface C1 denting from the first part P2 side to the second part P2. |
