FPC manufacturer：What is a FPC Annular Ring
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Popularity：1198Dated ：10-11-2021 07:37【big well Small】
A FPC annular ring is the area of the copper pad surrounding a drilled hole, usually a through-hole via. The region surrounding this via should contain adequate copper to form solid connections between the via and the copper traces.
Therefore, the primary function of an annular ring is to create solid connections, particularly in multilayer circuits. In a layman language, annular rings act as PCB anchors. The minimum annular ring diameter is determined by the FPC manufacturer’s assembling capacities, which differ based on the nature of holes and whether they are plated or not.
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