IR drop and EM issues are significant performance and reliability detractors at advanced nodes. Adding vias is the most effective means of correction, but traditional custom scripts are difficult and time-consuming, and do not guarantee correct-by-construction vias.

The Calibe YieldEnhancer PowerVia utility uses manufacturing requirements to perform automated insertion of DRC/LVS-clean vias. Results show significant improvements in EM/IR results, including substantial reductions in current density violations.


“Power structure design is becoming more challenging with every advance in technology nodes. Voltage drop (IR) and electromigration (EM) issues are growing in number and impact. Designers must find a way to manage increasing resistance from narrower metals, which has a direct effect on reliability and yield. With the increasing complexity of via rules required at advanced nodes, traditional custom scripts used to add vias have become too complex and time-consuming to control different stacks, complex spacing rules, different enclosure, and via count per width. The use of such scripts extends the time to market, impacting competitive positioning and profitability.

With the power grid width being pre-determined, the most effective means of lowering resistance is to insert additional vias into the layout. The Calibre® YieldEnhancer PowerVia utility provides a “push-button” via set-up and insertion process, delivering an easy, automated flow that inserts additional correct-by-construction vias as needed to reduce IR drop and EM issues, and improve design performance and reliability. growing in number and impact. Designers must find a way to manage increasing resistance from narrower metals, which has a direct effect on reliability and yield. With the increasing complexity of via rules required at advanced nodes, traditional custom scripts used to add vias have become too complex and time-consuming to control different stacks, complex spacing rules, different enclosure, and via count per width. The use of such scripts extends the time to market, impacting competitive positioning and profitability.

To determine how use of the PowerVia utility would affect both their design quality and tapeout schedules, Siemens EDA, a part of Siemens Digital Industries Software, worked with integrated circuit (IC) design companies to implement and evaluate the PowerVia solution in production designs.”

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Sponsored by Siemens Digital Industries Software.