IPC International Community magazine an association member publication
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112 I-CONNECT007 MAGAZINE I MAY 2026 F E AT U R E A RT I C L E BY ST E P H E N V. C H AV E Z , S I E M E N S E DA A N D P C E A In the race toward higher bandwidth, tighter form factors, and faster time-to-market, engineering teams focus heavily on device performance, routing density, and advanced materials. Yet one of the most critical determinants of system success remains largely invis- ible and too often underestimated: the integrity of the return path. Signal integrity (SI) failures rarely originate solely from the signal trace. More often, they stem from what designers don't see: the disruption of the signal's return path. Return path discontinuities are a leading cause of late-stage failures, unexpected EMI issues, and costly respins. Our challenge is not a lack of awareness, but a lack of visibility, continuity, and enforcement of return path intent across the design lifecycle. This article reframes return path discontinuities, not as isolated layout mistakes, but as a systemic design risk. I'll also provide practical strategies to eliminate them before they impact performance, compliance, and schedule. Mastering Return Path Discontinuities for Robust Signal Integrity