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October 2002

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Subject:
From:
Bev Christian <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 29 Oct 2002 14:19:10 -0500
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Carrie,
I don't know about acetone, but the test you are talking about sounds like IPC-TM-650 Test Methods Manual,number 2.3.23, "Cure (Permanency) Thermally Cured Solder Mask", where they talk about using methylene chloride. 

Perhaps your test is out of the old, what was it, SM840?  Anyone else?

regards,
Bev Christian
Research in Motion

-----Original Message-----
From: Morse, Carrie [mailto:[log in to unmask]]
Sent: October 29, 2002 2:08 PM
To: [log in to unmask]
Subject: [TN] Acetone Test for Solder Mask


We are currently doing an "Acetone Test" on our incoming PWB's to test for solder mask cure.
Our test entails saturating a swab with acetone and rubbing it on the mask.

Does anyone know where this test comes from?  Is it a documented IPC test?

Also, if we do see any residue (i.e.:  green or blue discoloration on the swab), what does this
tell us and how much is enough to deem the test "failed"?

-Carrie

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