The IC design bottlenecks: Challenges that slow you down<\/strong><\/h2>\n\n\n\nPlace-and-route (P&R) tools do a nice job of inserting cells and connecting them. But because the P&R solutions don\u2019t understand all the design rules, ensuring a\u00a0 DRC-clean<\/a><\/strong> design requires taking an overly conservative approach, which can limit the layout enhancing changes that can improve the EMIR results. As technology nodes shrink, maintaining a robust power delivery network becomes increasingly difficult due to higher transistor density and dynamic voltage drops. To deal with this complexity, automation is key in making physical design modifications to reduce design cycles. To a designer key automation steps include the reading of both the electrical analysis and layout data, making the layout modifications and then back annotating the results. Automated solutions need to understand all signoff design rules and honor them during the physical design stage. This shift-left approach ensures that the most accurate design rule descriptions are used for DRC checking, but you also have the flexibility in the layout to make the most effective modifications.<\/p>\n\n\n\nCalibre DE offers a different approach\u2014one that combines DRC knowledge with automation to deliver both compliance and performance enhancements.<\/strong><\/p>\n\n\n\nHow Calibre DE optimizes IC design<\/strong><\/h2>\n\n\n\nCalibre DE integrates seamlessly into existing design flows and provides targeted enhancements through three key use models that address time-to-market and power integrity. Calibre DE is designed to give users multiple layout enhancing solutions that that can be used throughout their design process. Currently Calibre DE has three use models in production.<\/p>\n\n\n\n
1. DE Pvr: Fast-tracking time-to-market with automated physical verification readiness<\/strong><\/p>\n\n\n\nWhen designing an advanced IC on the latest technology node, adding decoupling capacitors (DCAPs) and filler cells is an essential but very time consuming task. If skipped, physical verification (PV) runs will light up with DRC violations, but if done with the traditional P&R solutions, runtime can stretch into multiple hours. Calibre DE Pvr automates this process using the Calibre processing engine to quickly fill in the open spaces, thus reducing verification runtime from over 10 hours down to a few hours. This reduction in cycle time accelerates the path to production and minimizes last-minute surprises.<\/p>\n\n\n\n
2. DE Pge: Addressing EMIR issues<\/strong><\/p>\n\n\n\nAs process nodes shrink, IR drop and electromigration (EM) become critical design concerns. Calibre DE Pge (Power Grid Enhancement) automate enhancement to the power delivery network (PDN) by:<\/p>\n\n\n\n
\n- Optimizing power grid structures<\/strong> with DRC clean layout modifications.<\/li>\n\n\n\n
- Inserting parallel paths with the required via insertion<\/strong> to reduce resistance and minimize EMIR issues.<\/li>\n<\/ul>\n\n\n\n
These enhancements result in a more robust design that meets reliability requirements without increasing design size.<\/p>\n\n\n\n
3. DesignEnhancer Via: Reducing the IR drop and improving yield<\/strong><\/p>\n\n\n\nTo address the manufacturing concerns caused by vias and to reduce IR drop, use Calibre DE Via (Via insertion) to optimize user defined netsby maximizing the number of DRC clean vias to reduce the resistance.<\/strong><\/p>\n\n\n\n![\"Improvements](\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/50\/2025\/03\/blog-wilson-DE-fig1-1024x503.jpg\")
Improvements in static IR drop across multiple instances before using Calibre DE Via and after.<\/em><\/figcaption><\/figure>\n\n\n\nCase study: Google\u2019s IR drop success at 3 nm<\/strong><\/h2>\n\n\n\nGoogle faced significant IR drop issues when transitioning to a 3 nm process node. While scaling to smaller nodes improved area and performance, it also introduced new power integrity challenges. Increased voltage drops arose due to higher transistor density, leading to more static IR drop issues caused by narrower and longer interconnects. Additionally, power delivery inefficiencies created performance degradation risks.<\/p>\n\n\n\n
To address these challenges, Google leveraged Calibre DE\u2019s automated via insertion and power grid enhancement. This approach resulted in a 30% decrease in the number of high-IR drop instances. The modifications remained DRC-clean, eliminating the need for additional manual iterations. Ultimately, Google improved power integrity without overdesigning the PDN, ensuring a more efficient and reliable design process. Read the whole case study here<\/strong><\/a><\/p>\n\n\n\nCase Study: Intel enhances reliability with Calibre DE Via<\/strong><\/h2>\n\n\n\nIntel\u2019s graphics team also turned to Calibre DE Via to reinforce their power grid. Initially, their P&R tool failed to insert the maximum number of vias, leading to weak power connections. The complexity of via rules at 5 nm\u2014spanning spacing, width-based checks and via count requirements\u2014made manual fixes impractical.<\/p>\n\n\n\n
By leveraging Calibre DE\u2019s detailed rule knowledge, Intel:<\/p>\n\n\n\n
\n- Inserted 9 million additional vias on key nets.<\/li>\n\n\n\n
- Improved power grid robustness without introducing new DRC errors.<\/li>\n\n\n\n
- Achieved better electrical performance and yield. The chart below shows the via counts per net.<\/em><\/li>\n<\/ul>\n\n\n\n
![\"The](\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/50\/2025\/03\/86356-fig4-vias-chart.jpg\")
The Intel P&R team was able to maximize the number of vias on specified nets.<\/em><\/figcaption><\/figure>\n\n\n\nThese results demonstrate how Calibre DE\u2019s correct-by-construction methodology outperforms traditional \u00a0P&R approaches. Watch the full story here<\/a>.<\/strong><\/p>\n\n\n\nThe competitive advantage of correct-by-construction enhancements<\/strong><\/h2>\n\n\n\nUnlike conventional P&R tools, Calibre DE understands DRC rules at a deep level, enabling it to make aggressive yet compliant layout modifications. This capability leads to fewer design iterations and faster tape-outs, as well as improved electrical performance through optimized via structures and power grids. Calibre DE design kits offer solutions that span multiple foundries, supports multiple technology nodes and works with the leading P&R tools , to deliver the flexible IC designers need.<\/p>\n\n\n\n
The bottom line? Calibre DE is a layout enhancement solution that ensures DRC compliance while maximizing design improvements with specific use models.<\/strong><\/p>\n\n\n\nSeamless integration into existing design flows<\/strong><\/h2>\n\n\n\nCalibre DE integrates with industry-standard design tools, allowing:<\/p>\n\n\n\n
\n- Industry standards such as LEF\/DEF, OASIS and GDS formats to get data into and out of the various DesignEnhancer use models.<\/li>\n\n\n\n
- Design kits make it very easy to deliver multi-foundry and IDM support, ensuring consistency across different fabrication processes.<\/li>\n<\/ul>\n\n\n\n
By providing a flexible, automated approach to design enhancements, Calibre DE reduces complexity while improving design outcomes.<\/p>\n\n\n\n![\"Calibre](\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/50\/2025\/03\/Wilson_Blog_DE-IC-Challenges_v3.jpg\")
Calibre DesignEnhancer is design-kit driven and interfaces with multiple P&R and EMIR analysis tools.<\/em><\/figcaption><\/figure>\n\n\n\nConclusion: Smarter IC Design Starts with Calibre DE<\/strong><\/h2>\n\n\n\nAs semiconductor design continues to evolve, the need for automated, rule-aware design optimization becomes more pressing. Calibre DesignEnhancer meets this need by providing correct-by-construction solutions that enhance power integrity, reduce design iterations, and accelerate time-to-market. Our recent technical paper that dives even deeper into this topic is now available: Google and Intel find success with Calibre DesignEnhancer\u00a0<\/a><\/strong><\/p>\n\n\n\nWhether you\u2019re tackling IR drop, optimizing vias, or streamlining physical verification, Calibre DE provides the precision and automation necessary to navigate today\u2019s IC design challenges.<\/p>\n","protected":false},"excerpt":{"rendered":"
By Jeff Wilson As an IC designer, you know that achieving an optimal layout is about more than just meeting…<\/p>\n","protected":false},"author":71645,"featured_media":3112,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spanish_translation":"","french_translation":"","german_translation":"","italian_translation":"","polish_translation":"","japanese_translation":"","chinese_translation":"","footnotes":""},"categories":[303],"tags":[350,932,549,372,373],"industry":[],"product":[90],"coauthors":[712],"class_list":["post-3109","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dfm","tag-drc","tag-emir","tag-ir-drop","tag-physical-verification","tag-place-and-route","product-calibre"],"featured_image_url":"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/50\/2025\/03\/Wilson_Blog_DE-IC-Challenges_v3.jpg","_links":{"self":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts\/3109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/users\/71645"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/comments?post=3109"}],"version-history":[{"count":1,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts\/3109\/revisions"}],"predecessor-version":[{"id":3113,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts\/3109\/revisions\/3113"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/media\/3112"}],"wp:attachment":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/media?parent=3109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/categories?post=3109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/tags?post=3109"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/industry?post=3109"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/product?post=3109"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/coauthors?post=3109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Calibre DE offers a different approach\u2014one that combines DRC knowledge with automation to deliver both compliance and performance enhancements.<\/strong><\/p>\n\n\n\n Calibre DE integrates seamlessly into existing design flows and provides targeted enhancements through three key use models that address time-to-market and power integrity. Calibre DE is designed to give users multiple layout enhancing solutions that that can be used throughout their design process. Currently Calibre DE has three use models in production.<\/p>\n\n\n\n 1. DE Pvr: Fast-tracking time-to-market with automated physical verification readiness<\/strong><\/p>\n\n\n\n When designing an advanced IC on the latest technology node, adding decoupling capacitors (DCAPs) and filler cells is an essential but very time consuming task. If skipped, physical verification (PV) runs will light up with DRC violations, but if done with the traditional P&R solutions, runtime can stretch into multiple hours. Calibre DE Pvr automates this process using the Calibre processing engine to quickly fill in the open spaces, thus reducing verification runtime from over 10 hours down to a few hours. This reduction in cycle time accelerates the path to production and minimizes last-minute surprises.<\/p>\n\n\n\n 2. DE Pge: Addressing EMIR issues<\/strong><\/p>\n\n\n\n As process nodes shrink, IR drop and electromigration (EM) become critical design concerns. Calibre DE Pge (Power Grid Enhancement) automate enhancement to the power delivery network (PDN) by:<\/p>\n\n\n\n These enhancements result in a more robust design that meets reliability requirements without increasing design size.<\/p>\n\n\n\n 3. DesignEnhancer Via: Reducing the IR drop and improving yield<\/strong><\/p>\n\n\n\n To address the manufacturing concerns caused by vias and to reduce IR drop, use Calibre DE Via (Via insertion) to optimize user defined netsby maximizing the number of DRC clean vias to reduce the resistance.<\/strong><\/p>\n\n\n\n Google faced significant IR drop issues when transitioning to a 3 nm process node. While scaling to smaller nodes improved area and performance, it also introduced new power integrity challenges. Increased voltage drops arose due to higher transistor density, leading to more static IR drop issues caused by narrower and longer interconnects. Additionally, power delivery inefficiencies created performance degradation risks.<\/p>\n\n\n\n To address these challenges, Google leveraged Calibre DE\u2019s automated via insertion and power grid enhancement. This approach resulted in a 30% decrease in the number of high-IR drop instances. The modifications remained DRC-clean, eliminating the need for additional manual iterations. Ultimately, Google improved power integrity without overdesigning the PDN, ensuring a more efficient and reliable design process. Read the whole case study here<\/strong><\/a><\/p>\n\n\n\n Intel\u2019s graphics team also turned to Calibre DE Via to reinforce their power grid. Initially, their P&R tool failed to insert the maximum number of vias, leading to weak power connections. The complexity of via rules at 5 nm\u2014spanning spacing, width-based checks and via count requirements\u2014made manual fixes impractical.<\/p>\n\n\n\n By leveraging Calibre DE\u2019s detailed rule knowledge, Intel:<\/p>\n\n\n\n These results demonstrate how Calibre DE\u2019s correct-by-construction methodology outperforms traditional \u00a0P&R approaches. Watch the full story here<\/a>.<\/strong><\/p>\n\n\n\n Unlike conventional P&R tools, Calibre DE understands DRC rules at a deep level, enabling it to make aggressive yet compliant layout modifications. This capability leads to fewer design iterations and faster tape-outs, as well as improved electrical performance through optimized via structures and power grids. Calibre DE design kits offer solutions that span multiple foundries, supports multiple technology nodes and works with the leading P&R tools , to deliver the flexible IC designers need.<\/p>\n\n\n\n The bottom line? Calibre DE is a layout enhancement solution that ensures DRC compliance while maximizing design improvements with specific use models.<\/strong><\/p>\n\n\n\n Calibre DE integrates with industry-standard design tools, allowing:<\/p>\n\n\n\n By providing a flexible, automated approach to design enhancements, Calibre DE reduces complexity while improving design outcomes.<\/p>\n\n\n\n As semiconductor design continues to evolve, the need for automated, rule-aware design optimization becomes more pressing. Calibre DesignEnhancer meets this need by providing correct-by-construction solutions that enhance power integrity, reduce design iterations, and accelerate time-to-market. Our recent technical paper that dives even deeper into this topic is now available: Google and Intel find success with Calibre DesignEnhancer\u00a0<\/a><\/strong><\/p>\n\n\n\n Whether you\u2019re tackling IR drop, optimizing vias, or streamlining physical verification, Calibre DE provides the precision and automation necessary to navigate today\u2019s IC design challenges.<\/p>\n","protected":false},"excerpt":{"rendered":" By Jeff Wilson As an IC designer, you know that achieving an optimal layout is about more than just meeting…<\/p>\n","protected":false},"author":71645,"featured_media":3112,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spanish_translation":"","french_translation":"","german_translation":"","italian_translation":"","polish_translation":"","japanese_translation":"","chinese_translation":"","footnotes":""},"categories":[303],"tags":[350,932,549,372,373],"industry":[],"product":[90],"coauthors":[712],"class_list":["post-3109","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dfm","tag-drc","tag-emir","tag-ir-drop","tag-physical-verification","tag-place-and-route","product-calibre"],"featured_image_url":"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/50\/2025\/03\/Wilson_Blog_DE-IC-Challenges_v3.jpg","_links":{"self":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts\/3109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/users\/71645"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/comments?post=3109"}],"version-history":[{"count":1,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts\/3109\/revisions"}],"predecessor-version":[{"id":3113,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/posts\/3109\/revisions\/3113"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/media\/3112"}],"wp:attachment":[{"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/media?parent=3109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/categories?post=3109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/tags?post=3109"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/industry?post=3109"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/product?post=3109"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/calibre\/wp-json\/wp\/v2\/coauthors?post=3109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}How Calibre DE optimizes IC design<\/strong><\/h2>\n\n\n\n
\n
Case study: Google\u2019s IR drop success at 3 nm<\/strong><\/h2>\n\n\n\n
Case Study: Intel enhances reliability with Calibre DE Via<\/strong><\/h2>\n\n\n\n
\n
The competitive advantage of correct-by-construction enhancements<\/strong><\/h2>\n\n\n\n
Seamless integration into existing design flows<\/strong><\/h2>\n\n\n\n
\n
Conclusion: Smarter IC Design Starts with Calibre DE<\/strong><\/h2>\n\n\n\n