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Understanding PCB Annular Rings Basics | PCB Knowledge

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Understanding PCB Annular Rings Basics | PCB Knowledge

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PCBWay

136 Views • Jan 21, 2026

Description

PCBs have holes of various sizes and shapes, each serving a specific function. Some facilitate soldering, while others aid in component positioning and heat dissipation. However, the circular ring surrounding a via pad, often referred to as an annular ring, might be unfamiliar to many.