Double-sided adhesive sheet, joined body comprising double-sided adhesive sheet, and method for joining/separating adherends

A double-sided adhesive sheet joined body comprising:

• a double-sided adhesive sheet having a laminate structure, comprising:
• a first adhesive layer;
• a second adhesive layer;
• a first conduction substrate and a second conduction substrate between the first adhesive layer and the second adhesive layer;
• and
• a third adhesive layer between the first conduction substrate and the second conduction substrate, and containing an electrolyte electrically connected to the first conduction substrate and to the second conduction substrate,
• a first adherend to which the first adhesive layer adheres;
• and
• a second adherend to which the second adhesive layer adheres,
• wherein
• the first conduction substrate comprises a first surface facing the first adhesive layer and a second surface facing the third adhesive layer,
• the second conduction substrate comprises a third surface facing the second adhesive layer and a fourth surface facing the third adhesive layer,
• the first conduction substrate includes a first extension portion protruding in a first direction away from an end of the first adhesive layer and a first end of the third adhesive layer such that the first surface of the first conduction substrate is exposed with respect to the first adhesive layer and the second surface of the first conduction substrate is exposed with respect to the third adhesive layer, and
• the second conduction substrate includes a second extension portion protruding in a second direction opposite to the first direction away from an end of the second adhesive layer and a second end of the third adhesive layer such that the third surface of the second conduction substrate is exposed with respect to the second adhesive layer and the fourth surface of the second conduction substrate is exposed with respect to the third adhesive layer.