# AI Auto-Layout Just Got Smarter 🚀 Flux's latest update brings smarter AI Auto‑Layout with improved clarity, control, and routing intelligence—design better, faster. Written by [Ryan Fitzgerald](https://www.flux.ai/ryanf) Published Jul 2025 - 3 min read [![Flux Copilot astronaut points at a PCB with the text “Smarter AI Auto‑Layout” overlaid, highlighting the intelligence of Flux’s AI Auto‑Layout feature.](https://www.flux.ai/p/assets/blogs/ai-auto-layout-summer-update/main.webp)](#) ## Today, we’re excited to share our **Summer Update** to Flux AI Auto‑Layout, a collection of improvements designed to make one‑click PCB routing more reliable, transparent, and adaptable to your real‑world workflows. This update is a set of pragmatic steps toward our vision of Auto‑Layout as your trusted routing assistant. Here's what's improved: - **Prioritize Nets with Net Types**—add a ‘Net Type’ rule manually to your net properties or let Flux do it for you. - **Relaxed Clearance**—results are now cleaner, more manufacturable, and more reliable. - **Protected Polygons**—small copper polygons will be protected from trace intrusions while larger split planes still work as you need them. Auto‑Layout still works best when guided by thoughtful placement, clear net names, and rulesets—but now it’s a more predictable, collaborative partner in your design process. ### Deep Dive Inside the Summer Update #### 1\. Net Priority: Routing in Smart Sequence [![AI Auto-Layout Net Priority, Routing in Smart Sequence](https://www.flux.ai/p/assets/blogs/ai-auto-layout-summer-update/prioritize-nets.gif)](#) Classify your nets into seven priority buckets—**High Speed**, **Analog**, **Power**, **Medium Speed**, **Low Speed**, **Uncertain**, and **Ground**—and Auto‑Layout will route them in that exact order. Flux will infer the Net Type of each net in your design, but you can check and change the inference by selecting a net and altering the Net Type property. > **High‑speed nets go first.** > **Analog nets get their own quiet lanes.** > **Power nets find robust copper paths.** This helps ensure your most sensitive signals aren’t forced into awkward detours, delivering a draft layout that mirrors your own routing instincts. #### 2\. Relaxed Clearance: Cleaner Looks over Absolute Shortest Paths Previous versions of Flux Auto‑Layout often scrunched traces up against neighboring pads or nets to minimize length. We’ve softened that bias so traces now favor open board areas—even if they grow a few mils longer. - **Cleaner, more “organic” routing** reminiscent of a hand‑routed board - **Improved manufacturability**, with wider gaps reducing solder‑bridge risk - **Slightly longer traces**, so plan ahead if you’re in a length‑critical design Think of it as trading a few extra mils for a huge win in clarity and yield. #### 3\. Protected Polygons: Respect Your Copper ![AI Auto-Layout, now, any polygon covering less than 30% of the board area is automatically protected from wires and vias unless you explicitly disable that rule.](https://www.flux.ai/p/assets/blogs/ai-auto-layout-summer-update/protected-polygons.webp) Earlier, Auto‑Layout could inadvertently slice through copper pours—especially smaller ones. Now, any polygon covering less than 10% of the board area is automatically protected from wires and vias unless you explicitly disable that rule. - **No more surprise pour “islands”** in your Gerbers - **Seamless split‑plane support** for advanced power or ground schemes - **Greater peace of mind** when working with critical copper fills #### How to Make the Most of Auto‑Layout Today Auto‑Layout shines when you guide it. Here’s a quick workflow that scales from beginners to power users: 1. **Thoughtful Placement**. Follow general component placement best practices or [watch our video](https://www.youtube.com/watch?v=CtxEjmoIRpI&t=2s&ab_channel=Flux) on the placement tips. Group connectors, oscillators, and regulators close to their targets. Leave clear channels for high‑speed and analog nets. 2. **Classify Your Nets**‍ - Mark [differential pairs](https://docs.flux.ai/reference/impedance-control) and [high‑speed nets](https://docs.flux.ai/tutorials/advanced-routing) in the schematic. - Assign “Max Current” or “Thermal Rise” to [net properties](https://docs.flux.ai/reference/reference-inspector-properties#special-properties) to power nets. - Select ‘analog’ in the Net Type property for analog nets to isolate them from noisy neighbors.**‍** 3. **Define Zones & Rulesets**. Draw [Zones](https://docs.flux.ai/tutorials/creating-copper-cutouts#zones) around antennas or heat‑sensitive areas. Create [selector‑based](https://docs.flux.ai/reference/pcb-rules) rules for common net groups to speed up future projects.**‍** 4. **Choose a Workflow** - **Full‑Board Route:** One click, start to finish.**‍** - **Hybrid Approach:** Pre‑route critical nets, then finish with Auto‑Layout.**‍** - **Placement Check:** Run Auto‑Layout early to catch crowded components. ### Who Benefits Most - **Beginners** gain confidence by seeing a professionally routed board come together in minutes—while learning best practices from the resulting layouts. - **Intermediate & Advanced Users** offload repetitive low‑critical nets (LED arrays, sensor grids) and focus manual effort on the tricky high‑speed or power sections. Either way, Auto‑Layout becomes a force multiplier—not a replacement for your expertise. ### What’s Next This Summer Update is a milestone on our roadmap. In the coming months, expect deeper AI understanding of complex topologies, tighter integration with constraint management, and collaborative features that let teams iterate on one layout in real time. Your feedback is the compass that guides us. Try the Summer Update today—[log in](https://www.flux.ai/), hit **“Auto‑Layout”**, and tell us where it shined or stumbled via in‑app feedback. Together, let’s make routing the easiest part of hardware design. ## About the author [Ryan Fitzgerald](https://www.flux.ai/ryanf) Electronics Engineer at Flux Ryan is an electronics and electrical systems engineer with a focus on bridging the gap between deep learning intelligent algorithms and innovative hardware design. Find him on Flux [@ryanf](https://www.flux.ai/ryanf) Let’s start building Build your big idea together with Flux. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. ![Close-up photo of a PCB made with Flux, with an ESP32 module, buttons, and a microSD slot.](https://www.flux.ai/p/assets/blogs/miscellaneous/sidebar-cta-pcb.webp) [Try it Free](https://www.flux.ai/signup) ## More in AI & Prompt Engineering for Hardware [ ![What Makes a Perfect PCB Design Prompt](https://www.flux.ai/p/assets/blogs/how-to-write-a-perfect-pcb-design-prompt/main.webp) ### What Makes a Perfect PCB Design Prompt 8 Min Read](https://www.flux.ai/p/blog/what-makes-a-perfect-pcb-design-prompt)[ ![Flux, an AI hardware engineer pointing out the dos and don'ts when prompting.](https://www.flux.ai/p/assets/blogs/prompting-guide/main.webp) ### Prompting Guide: Working with Flux from Idea to Schematic 9 Min Read](https://www.flux.ai/p/blog/prompting-guide-working-with-flux-from-idea-to-schematic)[ ![A space-themed image with a central cartoon astronaut helmet against a backdrop of stars and nebulae in shades of purple. 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Let’s build your idea together. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. [Try it Free](https://www.flux.ai/signup) ![Close-up of a Flux-designed printed circuit board](https://www.flux.ai/p/assets/homepage-v2/mission-visual.webp)