Patent ID: 8912015

Claim:
An operating method of a hardwired switch, comprising: providing a first die; inspecting a function of the first die to obtain an inspected result; determining whether a first through silicon via is selectively disposed between a first landing pad and a fifth landing pad, between a second landing pad and a sixth landing pad, between a third landing pad and a seventh landing pad, or between a fourth landing pad and a eighth landing pad or not upon the inspected result, wherein the first landing pad, the second landing pad, the third landing pad the fourth landing pad are disposed on a first surface of the first die, and the fifth landing pad, the sixth landing pad, the seventh landing pad and the eighth landing pad are disposed on a second surface of the first die; disposing a third bond pad on the second surface, wherein the third bond pad is electrically connected to the fifth landing pad; disposing a fourth bond pad on the second surface, wherein the fourth bond pad is electrically connected to the seventh landing pad; disposing a fifth bond pad on a third surface of the second die, wherein the fifth bond pad is located at a relative position of the third bond pad; disposing a sixth bond pad on the third surface, wherein the sixth bond pad is located at a relative position of the fourth bond pad; and stacking the first die above the second die, so that the second surface and the third surface are located between the first die and the second die, wherein the fifth bond pad is electrically connected to the third bond pad, and the sixth bond pad is electrically connected to the fourth bond pad.