Adding decoupling function for tap cells

摘要

A tap cell includes a well region and a well pickup region of the well region; a VDD power rail; and a VSS power rail. A MOS capacitor includes a gate electrode line acting as a first capacitor plate, and the well pickup region acting as a part of a second capacitor plate. A first one of the first and second capacitor plates is coupled to the VDD power rail, and a second one of the first and second capacitor plates is coupled to the VSS power rail.

主权项

1. A circuit comprising:
a tap cell comprising:
a well region;a first well pickup region of the well region;a VDD power rail comprising a first edge;a VSS power rail comprising a second edge parallel to the first edge of the VDD power rail;a first jog continuously connected to the VDD power rail and forming a continuous metal region with the VDD power rail, wherein the first jog extends more toward the VSS power rail than the first edge; anda first MOS capacitor comprising a first gate electrode line acting as a first capacitor plate, and the first well pickup region acting as a part of a second capacitor plate, wherein a first one of the first and second capacitor plates is overlapped by and connected to the first jog, and a second one of the first and second capacitor plates is coupled to the VSS power rail.