Annular rings

An annular ring is the circumferential copper ring around a plated contact.

Example – Standard

Standard annular ring

Example – Microvia

Microvia annular ring

Example – Component hole

Component hole annular ring

see also Component holes


  • You should design the annular rings as large as possible (annular ring ≥ 125µm).
  • Please specify component holes ≤ 0.5mm with your order!
  • Component holes ≤ 0.6mm must be manufactured with a chemical surface, otherwise these holes will be filled with tin during the HAL process!