Thowing in IPC staff input, as a liason to both the IPC-A-600 and IPC-6012 task groups.
IPC-A-600F, section 1.2, 4th paragraph states that it "...is not intended to be used as a performance specification for printed board manufacture or procurement." Section 1.5 provides additional support of this, citing that "IPC-A-600 can be used as a support document for inspection. It does not specify frequency of in-process inspection or frequency of end product inspection."
At present, IPC-6011/6012 are the two documents that should be cited or required by contract for rigid boards, IPC-6011/6013 for flex boards, all with visual support through IPC-A-600. As indicated in 4.1 of IPC-6012A for rigid printed boards, "The requirements specific to Rigid Boards are contained in this specification and include the Qualification Testing, Acceptance Testing, and Frequency Quality Conformance Testing."
The assembly documents that IPC has are more nicely written in this regard, as in the cases of section 1.4.3 of IPC-A-610C and section 3.1.1 of IPC/EIA J-STD-001C, both of which specify precedence when one is cited or required by contract over the other.
The order of precedence between IPC-6012 and IPC-A-600 is not so nicely written, with portions of it spread throughtout various parts of section 1.0 of IPC-A-600F, and no clear information of the relationship role between the two provided in the current IPC-6012A specification.
A future revision of both documents should more clearly define a role between them, such as that of the IPC-6010 series being the documents that should be cited or required by contract, with visual support at the inspection level by the IPC-A-600. An existing loophole is that there is currently nothing that says IPC-A-600 cannot be contracted to. You'll notice words and phrases in the IPC-A-600 such as "not intended to" or "should be uniform quality to.....IPC-6010" and a clear absence of "shall be contracted to IPC-6010" with the word shall indicating a mandatory provision.
People can and still do specify to IPC-A-600. Neither document says you can't. A benefit of specifying to IPC-6010 is that they clearly state "Printed Boards furnished under this specification shall meet or exceed all the requirements of the specific class of this specification as required by the procurement documentation." They also provide quality assurance provisions such as acceptance testing frequency and quality conformance testing, though the documents stress that such qualification is "agreed upon by the user and supplier."
Regards,
John Perry
Technical Project Manager
IPC
2215 Sanders Road
Northbrook, Il 60062
1-847-790-5318 (P)
1-847-509-9798 (F)
[log in to unmask]
>>> [log in to unmask] 08/02/01 04:37PM >>>
Thanks Susan, but...IPC 600 clearly states "Printed boards should be of
uniform quality and shall conform to the IPC 6010 series". So, to conform to
this the tests and inspections outlined in 6010 must be performed.
Correct??? Maybe Jack can help us out a little?
Rick
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Thursday, August 02, 2001 2:29 PM
To: [log in to unmask]; [log in to unmask]
Subject: Re: [TN] IPC 600
One of my favorite topics - not!!!
The 6010 specification (6012 is to be "spec'd") NOT 600.
600 says IF you do an inspection or test this is what it should look like
and
here
are examples of various defects and what is acceptable for each class of
product.
But it DOES NOT REQUIRE ANY INSPECTIONS OR TESTS.
6012 has a sampling plan and details how many and how often various tests
and
inspections are to be performed.
Too many people certify their boards to 600 because they know they are good,
but
do no inspections or tests to confirm that fact.
OK, by now you probably get the picture that I think there is a
misunderstanding of the use of 600 vs 6012. People like to cert to 600
because it doesn't tie them to a specific number of tests.
Susan Mansilla
Robisan Lab
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