PCB surface treatments include anti-oxidation, tin spraying, lead-free tin spraying, immersion gold, immersion tin, immersion silver, hard gold plating, full board gold plating, gold fingers, nickel palladium gold; OSP is a low-cost, environmentally friendly technology with good weldability; spray tin is used for high-precision PCB production; golden fingers are used for transmitting signals in memory modules, with gold plating for high oxidation resistance and conductivity; WellCircuits Limited specializes in high-precision circuit boards to meet diverse customer needs.