San Francisco Circuits outlines that Immersion Tin, also known as White Tin, stands out as a RoHS-compliant (lead-free) PCB surface finish ideal for flat surface needs and fine pitch components. Read more >>
Immersion Tin involves applying a thin layer of tin onto the copper layer of a PCB, offering exceptional flatness that supports small geometries and surface mount components. This finish is also one of the most cost-effective immersion coatings, making it a popular choice for budget-conscious designs.
Despite its affordability, Immersion Tin has some limitations, including a shorter shelf life (3-6 months) and susceptibility to tin whiskering, which may impact long-term reliability. Proper handling and timely assembly are crucial to maintaining its performance.
It’s primarily used as a sustainable alternative to lead-based finishes, requiring fewer resources during its application. Its reworkability and flat surface make it an excellent choice for fine pitch components and BGA assemblies. However, it’s not recommended for contact switches or applications requiring long shelf lives.
San Francisco Circuits provides comprehensive printed circuit fabrication and assembly solutions, including Immersion Tin finishes, to meet diverse industry needs. Whether for consumer electronics, telecommunications, or high-performance applications, we ensure top-quality and sustainable options tailored to your project.
Read more about Immersion Tin PCB surface finish at the San Francisco Circuits website.
