Thanks for the input. I know this test is part of IPC-CC-830, so I wonder if it's worth having tested again. I wasn't planning to have the retest the rest of the tests from 830, but I will look into it.
Thanks!
Ryan Elson
Manufacturing Engineer
Bently Nevada
Baker Hughes, a GE company
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-----Original Message-----
From: SALA GABRIELE [mailto:[log in to unmask]]
Sent: Wednesday, November 08, 2017 3:32 PM
To: 'TechNet E-Mail Forum' <[log in to unmask]>; Elson, Ryan(BHGE) <[log in to unmask]>
Subject: EXT: R: [TN] Conformal Coating qualification
Have you already considered also IPC-TM-650 2.6.3 MIR test
http://www.ipc.org/TM/2.6.3F.pdf
1 Scope This test method is to determine the degradation of insulating materials by examination of the visual and electrical insulation resistance properties of printed board specimens after exposure to high humidity and heat conditions. This method allows testing with (Method A) or without (Method B) Conformal Coating. When not specified, Method A is the default method.
-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Elson, Ryan(BHGE)
Inviato: mercoledì 8 novembre 2017 23:49
A: [log in to unmask]
Oggetto: [TN] Conformal Coating qualification
Hello all,
We are looking at qualifying a new conformal coating, and have a number of requirements for manufacturability and inherent properties, meets IPC-CC-830 requirements, certain CTI rating, etc., and we have put together a lengthy test plan that includes different types of boards, including those with sensitive circuitry, boards with low surface energies, and the like. But I wanted to see what other industry standards we need to check and make sure we're not missing anything.
I think SIR testing with our existing solder paste & wave flux is the big one, and I was planning to use B-24 test coupons. We are also doing adhesion testing, checking against IPC-A-610 requirements, HASS testing, final testing, as well as various checks for manufacturability (such as viscosity and ability to coat with our selective spray equipment, good wetting at lower surface energies, ease of rework).
What else are we missing? Any other IPC test methods or compatibility checks to be concerned with?
Thanks!
Ryan Elson
Manufacturing Engineer
Bently Nevada
Baker Hughes, a GE company
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