Understanding HASL (Hot Air Solder Leveling) in PCB Manufacturing: A Guide by Viasion Technology
In Printed Circuit Board (PCB) manufacturing, surface finishing processes play a critical role in ensuring the reliability, durability, and solderability of electronic components. One widely used surface finish is HASL, which stands for Hot Air Solder Leveling. Viasion Technology , a leader in electronic manufacturing services (EMS), provides valuable insights into HASL and its importance in PCB assembly processes. This blog aims to demystify HASL, explaining its benefits, applications, and Viasion Technology’s expertise in delivering high-quality PCB solutions. What is HASL? HASL, or Hot Air Solder Leveling , is a surface finishing technique used to coat the exposed copper surfaces of a PCB with a layer of molten solder. The process involves several key steps: Flux Application: Initially, a flux is applied to the bare copper PCB to remove oxidation and ensure proper solderability. Solder Bath: The PCB is then immersed in a bath of molten solder. The solder adheres to the exposed co...