ENGINEERING ANSWER
Immersion silver is one option for exposed RF conductors and solderable pads. Selection must also consider handling, storage, environmental exposure and assembly process compatibility.
What to decide before release
Ask the fabricator for packaging and shelf-life requirements and the assembler for an approved process. Use measured performance on representative coupons when choosing between silver and nickel-bearing alternatives.
Checks to put in your design brief
- Confirm handling and storage controls
- Align finish with assembly
- Evaluate the complete operating environment
Important distinction
Do not choose a finish from RF loss alone if its storage and environmental requirements cannot be met.
Sources & basis
Material facts follow the cited source. Design checks are preliminary guidance, not supplier process instructions.