The process of OSP( Organic Solderability Preservatives) are based on benzimidazole,all kinds of benzimidazole derivatives have been developed,The company’s products is high purity, The OSP of coating is excellent solderability ,uniformity thickness, and can meet the 3 times IR reflow or can be baked at 155℃ for 4 hours ordeal etc. the Solderability is good in high temperature and high moisture conditions.