產品名稱：HASL

Spray tin, also known as hot leveling leveling (HASL), is on the copper surfacecoated with a layer of tin lead alloy, prevent welding base good copper surface oxidation and subsequent assembly processes.

The basic process of spray tin is the welding pad by flux and high temperature tin copper tin alloy formation (IMC), followed by high temperature, high pressure gas to achieve the purpose of smooth pad.