ELECTRONIC DEVICE, POWER SUPPLY CONTROL SYSTEM, AND LIFE MEASUREMENT UNIT

摘要

PROBLEM TO BE SOLVED: To provide an electronic device capable of performing measurement that the previously assumed temperature cycle has passed and measuring the life of an apparatus.SOLUTION: A life measurement unit 1 includes a sensor element 11, an interposer 12, and a mother board 13. The sensor element 11 and the mother board 13 are joined with the interposer 12 for electric connection. Since linear expansion coefficients are different between the sensor element 11 and the interposer 12, stress is generated in solder bumps being connected portions. A distance between a second solder bump 53 or 54 arranged at the end of the sensor element 11 in a short side direction and a first solder bump 51 is longer than a distance between the second solder bumps 53 and 54, so that stress is concentrated on the first solder bump 51. The presetting of a break in the first solder bump 51 in a previously assumed temperature cycle enables detection that the previously assumed temperature cycle has passed. Then, the life of an apparatus can be measured.