| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition which makes it easy to inhibit creep deformation of a flexible layer in a circuit board at least partially composed of the flexible layer.SOLUTION: A circuit board 10 includes: a layered part 20 in which a conductor layer 24 and an insulation layer 26 are layered; and a fixing part 5 partially inserted in the layered part 20. The fixing part 5 includes a first depressing part 81a and a second depressing part 74a which sandwich the layered part 20 in a thickness direction. The circuit board 10 includes: a first hole part 30 composed to pierce the layered part 20 in the thickness direction; and a reinforcement part 40 arranged at a position closer to the first hole part 30. The reinforcement part 40 includes: a second hole part 42 composed to extend in the thickness direction of the layered part 20 at a position of the layered part 20 and closer to the first hole part 30; and a reinforcement material 44 which is composed of a material having an elastic modulus higher than that of the flexible layer 27 and arranged with a composition extending in the second hole part 42 in the thickness direction.SELECTED DRAWING: Figure 1 |
