| 摘要 |
A circuit board includes a wiring substrate, a circuit that operates with a power from a first power supply and is provided on the wiring substrate, the circuit including a degrading component that degrades by being in a non-electrified state, a second power supply provided on the wiring substrate, an electrification control part that is provided on the wiring substrate and configured to intermittently electrify at least the degrading component by using a power from the second power supply. |
