What does non-plated mean?
Non-plated through holes are simple features that are either drilled or milled through your circuit board, which expressly do not receive a plating of conductive copper. Typical uses of NPTH features are mounting holes to allow screws or other fasteners to pass through your board.
What is the difference between plated through hole and non-plated through hole?
Through-hole technology, also spelled “thru-hole” are holes that go completely through the boards. They can be plated (PTH) or non-plated (NPTH). With plated through holes there is a conductive path from one side of the board to the other, as seen on Figure 1.
What is a plated via?
A via (Latin for path or way) is an electrical connection between copper layers in a printed circuit board. Essentially a via is a small drilled hole that goes through two or more adjacent layers; the hole is plated with copper that forms electrical connection through the insulation that separates the copper layers.
How to calculate PTH hole and pad diameter sizes according to?
Pad Diameter = Minimum Hole Size + 0.1mm + 0.60mm (for Level A of IPC-2221) Pad Diameter = Minimum Hole Size + 0.1mm + 0.50mm (for Level B of IPC-2221) Pad Diameter = Minimum Hole Size + 0.1mm + 0.40mm (for Level C of IPC-2221) Example: Maximum Lead Diameter = 0.55mm. According to Level A Minimum Hole Size = 0.80mm; Pad Diameter = 1.50mm.
How are non plated trough holes different from plated through holes?
Non-Plated Trough Holes (NPTH) As its name says, in this type of Through Holes there is no copper plated onto the walls of the holes, so the barrel of the hole has not electrical properties. They were very popular when Printed Circuits only had copper tracks printed on one side, but their use decreased as the number of layers in PCBs increased.
Is the barrel of a pth copper plated?
The mounting scheme of a PTH can be seen in Figure 2. As its name says, in this type of Through Holes there is no copper plated onto the walls of the holes, so the barrel of the hole has not electrical properties.
How does the plated through hole ( PTH ) process work?
It will do the plated through hole process after drilling for two layers or multilayer board. What does the plated through hole (PTH) work? PTH plays a role in depositing a thinner electroless copper with chemical process to be the later substrate of copper plating on a drilled and non-conductive base material of hole wall.