| 摘要 |
A circuit board device includes: a circuit board; an electronic component bonded to a first surface of the circuit board via an electronic component-bonding portion that is disposed over a rectangular region; and a reinforcing member disposed at one of four corners of a rectangular region of a second surface of the circuit board that is at a position corresponding to a position of the rectangular region of the first surface on a side opposite a side on which the rectangular region is present, wherein the reinforcing member includes a stress receiving portion having an outer edge located in a diagonal line direction of the rectangular region of the second surface and a stress dispersing portion extending in such a manner as to have a fan-like shape or a substantially fan-like shape toward the inside in the diagonal line direction with the stress receiving portion. |
