Tin Stripping in PCB Manufacturing: Everything You Need to Know
Printed Circuit Board (PCB) manufacturing involves a range of precise chemical processes to create clean, reliable circuitry. One of the most critical of these is tin stripping — a step that ensures accurate etching and defect-free boards. In this article, we’ll explain what tin stripping is, how it works, and why it’s so important in PCB production. What is Tin Stripping? Tin stripping is a chemical process used to remove tin or tin-lead coatings from a PCB after etching is complete. During earlier stages, tin acts as a protective resist to shield copper tracks while unwanted copper is etched away. Once etching is done, the tin must be removed to leave behind clean copper circuitry for subsequent finishing processes. The Tin Stripping Process The tin stripping process typically involves: Application of Stripping Solution – A specialised chemical solution is used to dissolve tin or tin-lead coatings. Controlled Reaction – The chemistry ensures select...