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Plated-through slots

1. The definition of plated slot

For a board, it may contain plated slot or unplated slot. Plated slot means this slot is plated with copper which can be used for electrical connection.

2. Pictures to show

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3. Size of plated slot

The min side of plated slot is 0.5mm for PCBWay. For unplated slot, the min size is 0.8mm width. 

If the through-plating is realized within the circuit board it is called plated-through slits, through-plating on the outer edge of the board is called sideplating.
Basically, each milling with copper connections on TOP and BOTTOM will be produced as plated-through hole (PTH). Is a non-plated-through (NPTH) milling desired, the milling should be exempted from the copper. 

4. Plated slot process 

It is similar with plated holes . Milling the slots-copper sink-- surface finish (tin-plated for hasl , gold-plated for immersion gold).

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