Presentation
Differentiable Fill Insertion with Explicit Delay Optimization
DescriptionFill insertion need to consider not only density uniformity but also delay. Existing algorithms reduce such delay implicitly by minimizing proxies (fill amounts, overlays between fills, etc) but there remains misalignment between the reduction of proxies and improvement of the signal delay. We propose DiffFill, a novel differentiable framework for fill insertion that explicitly optimizes both uniformity and delay. At the heart of DiffFill is the CapFormer, a Transformer-based capacitance extractor that estimates capacitance values used to construct a differentiable delay objective based on the Elmore delay formulation. DiffFill significantly outperforms the state-of-the-art methods.
Event Type
Research Manuscript
TimeTuesday, July 281:30pm - 1:42pm PDT
LocationMtg Room 202AB