What Makes PCB Via Design Reliable for High-Speed Boards?
A high-speed PCB can have controlled-impedance traces, a planned stackup, and clean routing yet still develop signal-integrity problems at a layer transition. The via may be the missing piece. In interfaces such as PCIe, DDR5, USB 3.x, and high-speed SerDes, a via is more than a connection between copper layers. Its stub length, pad geometry,
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