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Date: | Thu, 1 Nov 2012 16:30:37 -0500 |
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Hi Joyce - Kevin has flat circuit boards and it was recommended that he
must use calibrated standards. On what point is there a disagreement?
Dave
From: Joyce Koo <[log in to unmask]>
To: <[log in to unmask]>
Date: 11/01/2012 09:58 AM
Subject: Re: [TN] ImAg thickness measurement / verification methods
Sent by: TechNet <[log in to unmask]>
Sorry to disagree. It only works with proper calibration std and your
specimen plating is relatively flat. If your surface is very rough, you
got error in reading (unless you use another method to validate)
--------------------------
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----- Original Message -----
From: Kevin Glidden [mailto:[log in to unmask]]
Sent: Thursday, November 01, 2012 10:35 AM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [TN] ImAg thickness measurement / verification methods
Thanks, everyone, for your responses. It appears XRF is a valid tool for
measuring ImAg thickness.
I still have a need to have a few PCB samples analyzed. I have some PCBs
that show ImAg copper-like discoloration after only 1 reflow cycle on the
non-populated side. I would like to confirm what this discoloration is,
and investigate / confirm if it is due to ImAg plating thickness or
porosity issues.
Offline responses ok.
Thank you.
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