Cadence Adds Real-Time DFM PCB Design

Cadence Design Systems provides Cadence Allegro PCB DesignTrue DFM technology that performs real-time, in-design design-for-manufacturing (DFM) checks integrated with electrical, physical and spacing design rule checks (DRCs). The technology, integrated into the Allegro PCB Editor, enables PCB designers to identify and correct errors immediately, long before manufacturing signoff. By finding errors earlier, design teams reduce rework, shorten design cycles and accelerate the new product development and introduction process, potentially saving at least one day per iteration and days to weeks overall.

Cadence originalUnlike manufacturing signoff tools that are run in batch mode when performing DFM checks, DesignTrue DFM technology provides continuous in-design feedback while designing, eliminating the frustrating and time-consuming design-verify-fix iterations between PCB designers and DFM checking teams. By the time PCB designers reach final DFM signoff, they already know their design meets manufacturing rules, resulting in a smoother signoff and handoff to the manufacturing partner and a shorter, more predictable design cycle.

Introduced in September, DesignTrue DFM technology is consistent with the proven Allegro constraint-driven design flow and online checking solution currently used for electrical, physical and spacing rules. DesignTrue DFM technology provides a wide set of checks to ensure design manufacturability. Spacing between copper features such as traces, pins, vias relative to the board outline and other copper features can be verified in real time, independent of electrical and net-based rules.

The new technology makes it easy to configure, apply contextually and reuse manufacturing rules. DesignTrue DFM technology supports the import and export of DFM rules and addresses more than 2,000 advanced checks. In addition, it employs a new and more user-friendly DRC browser capable of addressing one class of errors at a time. Constraints are highly configurable with the ability to enable and disable groups and whole categories of rules, or individual rules. Rules can be applied in etch mode, non-etch mode, and in stack-up mode, giving designers the ability to isolate layers, geometries and cutouts. The new browser also features an integrated DRC description with graphics, characterizes DRCs by type and provides a DRC count chart. Users can quickly sort, browse and review, as well as waive and unwaive DRCs.

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