The Difference Between Matte Tin And Bright Tin
May 13, 2022
The Difference Between Matte tin and Bright tin
Full tin plating is usually divided into "Matte tin" and "Bright tin" , fuse end caps are generally plated with matte tin. What's the difference between Matte tin and Bright tin?
| Title | Matte tin | Bright tin |
| Solderability | Good | Poor and prone to tin whiskers (because organic impurities will generate compressive stress and generate tin whiskers) |
| Reliability | Relatively stable and not easy to produce tin whiskers | It is easy to grow tin whiskers after being stored for a long time, causing a short circuit |
| Plating Differences | Plating crystal particles are coarse | Brightening agent will be added to make the crystal particles of the surface coating thin and shiny, but the brightening agent contains organic substances, which will hinder the soldering. |
| Tin Plating Stress Residue | tensile stress | compressive internal stress |
| Plating cost | more expensive | less expensive |
| Organic Sediment Content | about 0.015% | about 0.015% |
| Appearance Difference | The surface is dull and matt. | The surface is bright and beautiful. It is easy to turn yellow after reflow soldering. |
| Temperature Resistance | High temperature resistance after welding | Poor temperature resistance. In terms of parts, there is a chance of secondary melting of tin. |
| General Appliction | Terminals for welding, such as fuse copper caps, fuse contacts, etc. | Terminals which need for appearance, like cold-pressed terminals. |
