Patent ID: 8810031

Claim:
An electronic device having a stacked structure, comprising: a first electronic layer having a first interface, and including a first substrate and a first device layer disposed on the first substrate, the first device layer having at least one circuit device and a first passivation layer, wherein the first interface is located between the first substrate and the first device layer, and the first passivation layer has a first surface opposite to the first interface; a second electronic layer disposed on the first electronic layer, and having a second interface, a second substrate and a second device layer, wherein the second interface is located between the second substrate and the second device layer; a gap located between the first electronic layer and the second electronic layer; at least one first step-structured metal post arranged in the first device layer, and extending from the first interface to the gap, without being electrically connected to the circuit device; at least one joint located in the gap and connected to the at least one first step-structured metal post; a first straight metal post arranged in the second substrate, connected to the at least one joint, and extending to the second interface; and at least one second step-structured metal post arranged in the second device layer and connected to the first straight metal post.