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August 2007

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Subject:
From:
"Whittaker, Dewey (EHCOE)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Whittaker, Dewey (EHCOE)
Date:
Mon, 20 Aug 2007 11:02:40 -0700
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Not to cloud your judgment, but the answer to your questions are
nebulous at best. We are working these and other issues to clear up any
contradictions in terms or dichotomies in the referenced IPC
Specifications.
Dewey 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kevin Glidden
Sent: Monday, August 20, 2007 10:53 AM
To: [log in to unmask]
Subject: [TN] IPC-6012 questions..

1) IPC-6012 / IPC-600.  Is acceptability per IPC-A-600 implicit in
IPC-6012?
Our PCB drawings have notes stating fabrication per 6012, acceptability
per
600.  The vendor is stating IPC-600 is implicit in 6012.  I see the
logic,
and even agree, but no-where in 6012 (that I could locate), except
"Reference Documents" is there mention of 600.  600 has a nice statement
in
section 1.5 stating "IPC-6010 series establishes the minimum
acceptability
requirements for printed boards.  This document, IPC-A-600, is a
companion
and complementary document, providing pictorial interpretation of these
requirements."   So I have a link from 600 to 6010 series, but nothing
from
6010 series to 600. ???
 
2) IPC-6012, Section 3.8.2.  "Electrical Continuity and Insulation
Resistance".
First sentence states "Boards shall be tested in accordance with
IPC-9252,
 
IPC-9252 ""Guidelines and Requirements for Electrical Testing of
Unpopulated
Printed Boards." does not use the term "Insulation Resistance" anywhere.
They define "isolation resistance" (sect 3.21) and define an "Isolation
Test" method (sect 4.2).
 
I am not an expert in test, particularly around bare PCBs (vs populated
pcbs), but I had always understood isolation to mean something
completely
different than insulation resistance.  Is this correct?  Is the 6012
reference to "Insulation" resistance in error?
 
II would be particulary interested in getting some test basics from
someone,
offline even if required.
 
 
Kevin Glidden
Manufacturing Engineer
Luminescent Systems Inc.
4 Lucent Drive
Lebanon, NH 03766
(603) 643-7766 x3152
 
 

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