> For the complete documentation index, see [llms.txt](https://docs.quilter.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quilter.ai/physics-rule-checks-prcs.md).

# Physics Rule Checks (PRCs)

- [Overview](https://docs.quilter.ai/physics-rule-checks-prcs/overview.md): Overview of Physics Rule Checks (PRCs) applied by Quilter to validate user-defined physics constraints.
- [Ground Plane Overlap](https://docs.quilter.ai/physics-rule-checks-prcs/ground-plane-overlap.md): Explanation of the Ground Plane Overlap PRC, verifying consistent ground coverage beneath impedance controlled signals to ensure signal integrity and minimize EMI.
- [Invalid Width Span](https://docs.quilter.ai/physics-rule-checks-prcs/invalid-width-span.md): Summary of the Invalid Width Span PRC, ensuring trace widths remain within acceptable tolerances for impedance control, current capacity, and EMI mitigation.
- [Layer Switch Count](https://docs.quilter.ai/physics-rule-checks-prcs/layer-switch-count.md): Summary of the Layer Switch Count PRC, verifying minimal via count between bypass capacitors and associated pins to maintain low impedance and effective decoupling.
- [Length Mismatch](https://docs.quilter.ai/physics-rule-checks-prcs/length-mismatch.md)
- [Overheated Length](https://docs.quilter.ai/physics-rule-checks-prcs/overheated-length.md)
- [Pin Distance](https://docs.quilter.ai/physics-rule-checks-prcs/pin-distance.md): Summary of the Pin Distance PRC, checking pin spacing to ensure short traces, reduced EMI, and improved routing efficiency.
- [Trace Path Length](https://docs.quilter.ai/physics-rule-checks-prcs/trace-path-length.md): Summary of the Trace Path Length PRC, validating trace lengths to minimize inductance, enhance noise filtering, and ensure efficient power and signal integrity.
- [Uncoupled Spacing](https://docs.quilter.ai/physics-rule-checks-prcs/uncoupled-spacing.md): Summary of the Uncoupled Spacing PRC, checking differential pair spacing to ensure effective electromagnetic coupling, consistent impedance, and minimal crosstalk.
- [Future PRC2s](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s.md)
- [Top Plane Ground Pour](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s/top-plane-ground-pour.md)
- [Neck Downs](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s/neck-downs.md)
- [Trace Proximity](https://docs.quilter.ai/physics-rule-checks-prcs/future-prc2s/trace-proximity.md)


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