Back Drilling Process for High-Speed PCB: Complete Via Stub Removal Design & Manufacturing Guide
Back drilling is a critical controlled-depth secondary drilling process for modern high-speed PCBs. It eliminates unused via copper stubs that cause signal reflection, electromagnetic resonance, jitter degradation and eye diagram closure. With the rapid upgrade of PCIe 4.0/5.0, 100G Ethernet, 112G PAM4, DDR5 and AI server backplane designs, traditional full-through vias can no longer meet…