Dear all customers, Kindly reminding that the Chinese festival holiday in Weller is 1st Feb to 19th Feb and production will be closed then, please schedule your order beforehand to avoid any production delay due to our holiday.

Via hole plugging

It is to plug the via holes by solder mask or by resin performed in a clean room.(Or fill the via holes with copper,which is another process).

How to do this? By screen printing to push soldermask into holes – a separate operation using an aluminium stencil.

WELLER perform the plugging criteria with 70% filling per hole. This is to eliminate the risk of “broken” circuit path after high temperature in assembly process.