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A surface finish can be either organic or metallic in nature. Comparing both types and all available options can quickly demonstrate the relative benefits or drawbacks. Typically, the decisive factors when it comes to selecting the most suitable finish is the end application, the assembly process and the design of the PCB itself. Below you can find a brief summary of the most common finishes, however for further or more detailed information, please Contact Us and we will be more than happy to answer any of your questions.
Immersion Ag – Immersion Silver
Typical thickness 0.05 – 0.30um. Shelf life: 6 months
IAg (Immersion Silver) PCB delivers smoother surface than HASL PCB. This kind of PCB surface finish is perfect for circuit in high density.
- Immersion finish = excellent flatness
- Good for fine pitch / BGA / smaller components
- Mid range cost for lead free finish
- Can be reworked