An electronic equipment, comprising: a semiconductor device including an electrode joined to an electric conductor via a joint layer, the semiconductor device being configured to pass current bidirectionally with respect to the electric conductor, a direction of the current being switched over time between a state in which forward current flows in one direction through the joint layer and a state in which reverse current flows in an opposite direction through the joint layer; a calculator configured to calculate an imbalance electromigration progression index, the imbalance electromigration progression index being a difference between a forward current electromigration progression index of electromigration generated in the joint layer due to the forward current and a reverse current electromigration progression index of electromigration generated in the joint layer due to the reverse current; and a controller configured to: speed up an increase rate of the reverse current electromigration progression index in at least a part of an excessive forward current electromigration period during which the forward current electromigration progression index is larger than the reverse current electromigration progression index; and speed up an increase rate of the forward current electromigration progression index in at least a part of an excessive reverse current electromigration period during which the reverse current electromigration progression index is larger than the forward current electromigration progression index. a semiconductor device including an electrode joined to an electric conductor via a joint layer, the semiconductor device being configured to pass current bidirectionally with respect to the electric conductor, a direction of the current being switched over time between a state in which forward current flows in one direction through the joint layer and a state in which reverse current flows in an opposite direction through the joint layer; a calculator configured to calculate an imbalance electromigration progression index, the imbalance electromigration progression index being a difference between a forward current electromigration progression index of electromigration generated in the joint layer due to the forward current and a reverse current electromigration progression index of electromigration generated in the joint layer due to the reverse current; and a controller configured to: speed up an increase rate of the reverse current electromigration progression index in at least a part of an excessive forward current electromigration period during which the forward current electromigration progression index is larger than the reverse current electromigration progression index; and speed up an increase rate of the forward current electromigration progression index in at least a part of an excessive reverse current electromigration period during which the reverse current electromigration progression index is larger than the forward current electromigration progression index. speed up an increase rate of the reverse current electromigration progression index in at least a part of an excessive forward current electromigration period during which the forward current electromigration progression index is larger than the reverse current electromigration progression index; and speed up an increase rate of the forward current electromigration progression index in at least a part of an excessive reverse current electromigration period during which the reverse current electromigration progression index is larger than the forward current electromigration progression index.