Patent ID: 9318397
Filing Date: 2016-04-19
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first LSI including a first processing unit and a first power-supply test circuit, the first processing unit having a normal mode and a power consuming mode; a second LSI stacked with the first LSI and including a second processing unit and a second power-supply test circuit, the second processing unit having the normal mode and the power consuming mode; and a power-supply through via that connects the first LSI and the second LSI and supplies an operating voltage to the first LSI and the second LSI, wherein power consumption of the first processing unit in the power consuming mode is larger than power consumption of the first processing unit in the normal mode, power consumption of the second processing unit in the power consuming mode is larger than power consumption of the second processing unit in the normal mode, when the first processing unit is in the power consuming mode, the first power-supply test circuit measures a voltage value of the operating voltage supplied via the power-supply through via, and when the second processing unit is in the power consuming mode, the second power-supply test circuit measures a voltage value of the operating voltage supplied via the power-supply through via.