Thanks Lamar and Bev
That was my second choice, but I didn't want to spend the money on the subcontract without a sanity check on the discrimination/classification capability of the technique.
Chris

From: Lamar Young [mailto:[log in to unmask]]
Sent: Wednesday, August 18, 2010 12:53 PM
To: TechNet E-Mail Forum; Chris Mahanna
Subject: Re: [TN] resist or adhesive?

Chris,

FTIR may work.  Comparing the unknown to a known spectra of the resist, polyimide and acrylic should identify the debris.

Lamar



From:        Chris Mahanna <[log in to unmask]>
To:        [log in to unmask]
Date:        08/18/2010 12:16 PM
Subject:        [TN] resist or adhesive?
Sent by:        TechNet <[log in to unmask]>
________________________________



I have a customer who is asking me to come up with a test-

To prove with a high degree of certainty whether debris that is encapsulated in a hole-wall plating nodule (which is now ground/polished open in a section) is resist, polyimide flex, or acrylic coverlay adhesive.

I said: "well it is translucent, and it isn't blue".  IMO it is almost certainly the acrylic adhesive.

Could I put the mount in a bath of resist strip and see if the inclusions dissolve?

Chris Mahanna
Robisan Lab

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