Pcb Varnish. It is widely available and very economical. Please find here under a list of pcb surface finish.
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The surface finish forms a critical interface between the component and the pcb. It is widely available and very economical. To ensure solderability and to protect exposed copper circuitry.
Finish type 1 hot air solder leveling hasl hot air solder leveling is the least expensive type of pcb surface finish.
Please find here under a list of pcb surface finish. Knowing which types of surface finishes exist is simple enough but how do you determine which is best for your pcb. Osp organic solderability preservative or entek or passivation is an organic finish that bond with copper. It is probably the most eco friendly surface finish it requires little energy and no toxic materials are used.
