Do you know the right thickness of the electroplate
First factor is the thickness copper of the hole walls.
You know different layer circuit is connected by the hole wall copper.
Rich experience rigid PCB designers summarized some tips below.
The better conductivity through the holes, the better electronic performance of rigid PCB has.
Then the exact thickness hole walls copper.
From 4MCPCB experts, it’s depend on different PCB project requirements.
Normal electronic applications, the average plate hole walls are 25 microns.
If you have any unique require, you can pollute more than 25 microns of copper on the hole walls.
By the way, the thickness of rigid PCB surface finish may differ.
Because the boats are designed to produce an even copper thickness across the panel.
But in the electroplated copper process, it’s hard to plate same thickness.
My the surface tracks plate 25-31 microns.
The throwing power technology uses in electroplate copper
In many details section industry sections, there were some new technology developed.
In rigid PCB manufacturing, electroplated copper also have developed.
Big PCB companies use modem chemical solutions that use throwing powerful technology.
This means they can produce an even thickness of copper right through the hole.
Plated a thin layer of Tin is necessary
You may confuse that why this electroplated copper article discuss the thin layer plated.
4MCPCB PCB experts told Emma, the thin layer is aimed to protect the copper layer.
This means once we have played the copper onto the board, we then plated a thin layer of tin.
And we will use in the next step of the process when we etch off the unwanted copper foil.