Abstract: An input/output port circuit includes an input/output pad, a transistor, and a conductive routing wire. The transistor has a first connection terminal and a second connection terminal. The first connection terminal of the transistor is electrically connected to the input/output pad through a conductive connection wire, and the second connection terminal is electrically connected to another transistor. The conductive routing wire is electrically connected to the first terminal of the transistor. The conductive routing wire is configured to provide a serial resistance, thereby forcing a surge current to flow toward the another transistor when the surge current is inputted in the input/output circuit through the input/output pad.

Abstract: The present invention provides a capacitor structure including a metal oxide semiconductor (MOS) capacitor and a metal oxide metal (MOM) capacitor. A gate electrode, a source electrode and a drain electrode of the MOS capacitor have a first finger-shaped structure implemented by a first metal layer. The MOM capacitor comprises a second finger-shaped structure implemented by a second metal layer. The second metal layer is adjacent to the first metal layer in a vertical direction.