Resin plug-hole technology is popular on multi-layer PCB boards and thicker PCB boards. People use resin plug-holes to solve a series of problems that cannot be solved by using green oil plug holes.
Let's first look at the difference between the resin plug-hole and the green oil plug hole.
By comparison, it can be found that the resin plug-hole directly plugs the hole, which can perfectly improve the ink shrinkage in the hole and the plug hole is not full that easily occur in the green oil plug hole process.
At the same time, it is also possible to plate copper and wire on the surface of the plug hole according to the wiring requirements to increase the density of the line.
In terms of acid and alkali resistance, resin plug holes also have an advantage over green oil.