Method 2.6.3.5 was a shameless copying of the SIR testing for bare board 
fabricators, required in Bellcore GR-78-CORE, as Graham indicated.  At the 
time we drafted 2.6.3.5, Bellcore was devoting no technical resources to 
that document and was not supporting it, so IPC put the method in place. 

Graham, are you certain the SIR test in GR-78-CORE was superceded by 
2.6.3.7?  I know the J-STD-004 flux requirements went that way, but this 
would be the first that I had heard that Bellcore likewise adopted it.  I 
agree that the GR-78-CORE test is quite old, but it was still a pretty 
good test to determine cleanliness.  The almost impossibly high levels 
were very difficult to achieve if you had any detrimental residues 
present.

Doug Pauls



From:   Graham Naisbitt <[log in to unmask]>
To:     <[log in to unmask]>
Date:   01/09/2013 09:56 AM
Subject:        Re: [TN] TM 650 , Method 2.6.3.5 - Bare Board SIR
Sent by:        TechNet <[log in to unmask]>



Hi Richard

To the best of my knowledge that was called up by IPC 6012. I don't know 
whether this is under review - but it should be (2007 = 5 year rule). I 
will take this matter up with the group at APEX.

I suggest you apply some caution to the veracity of any data you produce, 
as the method really needs to be updated. The old Bellcore GR-78-CORE was 
superceded by method 2.6.3.7

Hope this helps

Graham Naisbitt ? Vice-Chairman IPC TGs: SIR / ECM; CAF & 7-11 Test 
methods Sub-Committee, IEC TC91 WG3 Project Leader, BSi EPL 501, UK IAG
E: [log in to unmask]
T: 012 5252 1500



On 7 Jan 2013, at 20:29, Richard Kraszewski 
<[log in to unmask]> wrote:

> Can anyone tell me which IPC bare board documents references test method 
2.6.3.5 to meet a minimum SIR requirement?
> 
> Rich  Kraszewski - Plexus Engineering 
> 
> 
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