Antenna effect prevention by model extraction in a circuit design for advanced processes

A method for determining an antenna ratio for an interconnect in a circuit block, the interconnect being routed through one or more connection layers and being electrically coupled to one or more gate oxide areas, the method comprising:

• identifying a first connection layer on which a pin of the block is coupled to the interconnect;
• determining a cumulative antenna ratio for all components of the interconnect with regard to the first connection layer by considering an antenna effect caused by each component on the first connection layer with regard to the gate oxide areas coupled thereto and caused by any components on one or more connection layers coupled between the component of the first connection layer and the coupled gate oxide areas;
• and
• calculating one or more cumulative antenna ratios with regard to one or more connection layers above the first connection layer in the same fashion as determining the cumulative antenna ratio for the first connection layer until a cumulative antenna ratio for a top most connection layer is obtained, wherein the cumulative antenna ratio for the top most connection layer is the antenna ratio for the interconnect.

A method for determining an antenna ratio for an interconnect in a circuit, the interconnect being routed through one or more connection layers and being electrically coupled to one or more gate oxide areas, the method comprising:

• determining a number of connection layers involved with the interconnect;
• determining a cumulative antenna ratio for all components on each connection layer by considering an antenna effect caused by each component on a predetermined connection layer with regard to the gate oxide areas coupled thereto and any components on one or more connection layers coupled between the component of the predetermined connection layer and the gate oxide areas, wherein the determining a cumulative antenna ratio for the components on a predetermined connection layer further includes:
• determining one or more gate oxide areas coupled to a predetermined component on the predetermined connection layer;
• determining one or more connection routes between the predetermined component and the gate oxide areas;
• and
• determining a cumulative antenna ratio for each connection route, wherein a largest cumulative antenna ratio among the determined cumulative antenna ratios for all the connection routes is the cumulative antenna ratio for the predetermined component;
• and
• calculating a top layer cumulative antenna ratio for the interconnect based on the cumulative antenna ratios.