Hi everyone,

Hoping all 'Netters in the path of Sandy are safe and sound today.

I am looking for someone who can verify ImAg plating thickness in the range of 5 to 12 micro-inches applied over copper using XRF techniques.  The IPC-4553 specification indicates this might be more difficult to achieve for silver than for other finishes, and requires some specialized equipment and calibration methods.  I am looking to have this done on around 5 or 6 PCBs only.  Offline responses / quotes are OK.

As a follow up, is anyone out there using XRF or other measurement techniques to measure thickness of finish platings as part of PCB incoming inspection criteria?  If so, what equipment(s) are required and what would be the estimated investments?

We periodically see ImAg finish boards that show copper through on the second side after only one pass through SMT reflow.  We spec 5-12 micro-inches, but sometimes measurements have shown we are getting as little as 2 to 3.  I am wondering if it is warranted to sample incoming lots for verification.

Thanks,

Kevin Glidden


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