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On PCB boards, we will see many holes with various sizes, these PCB holes can be categorized into two types: PTH (Plating Through Hole) and NPTH (Non Plating Through Hole).

Introduction Printed circuit boards (PCBs) contain plated through holes and vias to establish interconnections between various copper layers and provide mounting holes. Apart from round holes, PCBs can incorporate special non-round hole shapes like ovals, slots and castellations to serve unique mech

NPTHs or non-plated through holes are holes drilled in the PCB that are not plated with copper. They serve only a mechanical function like mounting components or providing heat sinks.