PCB HASL pre treatment of HASL and post treatment of HASL
The working principle of HASL is to use hot air to remove excess solder on the surface and holes of the PCB, and the remaining solder is evenly coated on the pads, non-solder resist lines and surface packaging points. It is one of the surface treatment methods of the PCB. Post treatment of HASL swings precisely and conveys stably. It is simple to replace brushes and convenient to maintain. It has beautiful and elegant appearance, compact structure and long service life.
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