How to choose PCB surface coating?

<p><br></p><p>Since <a href="https://www.atech<a href="https://www.atechpcb.com/pcb-manufacturing" target="_blank">pcb</a>.com/pcb-manufacturing" rel="noopener noreferrer" target="_blank">PCB</a> surface coating is closely related to PCB solderability, reliability and shelf life, special attention must be paid. Special selection should be made according to application conditions and fields.</p><p><br></p><p><br></p><p>Due to the different nature and application effects of surface coatings, the PCB manufacturing process should be selected according to the application requirements and specific application areas, and the complexity and cost of the manufacturing cannot be used as the main basis for judgment.</p><p><br></p><p><br></p><p>Generally speaking, for civil or general industrial electronic products, solder flux without surface coating of isolation layer, such as HASL, OSP, etc. should be selected.</p><p><br></p><p><br></p><p>In the pursuit of high reliability and long life applications, such as medical, transportation, military, aerospace, etc., the surface coating should be selected, and the flux is welded on the isolation layer, such as ENIG and ENEPIG.</p>