Robert, Try J-STD-001B, IPC-TM-650 and IPC 9201(SIR Test Handbook)
I offer for your consideration that ionic extract cleanliness testing (SEC or
ROSE) may be an insufficient method of determining the quality and reliability
of your finished product.
Present ROSE testing suggests a "cleanliness" level of < 1.5 microgrammes /
cm2 (10 microgrammes / inch2) NaCl equivalence. This therefore implies that it
is acceptable to leave up to that level on every square inch or centimeter of
your assembly. If you are manufacturing fine line, fine pitch, high frequency,
BGA, Flip-Chip, COB etc., then this level will prove almost certainly, to be
too high. Furthermore, it takes no account of non-ionic contaminants that are
present in many modern process chemistries.
New SIR instruments and methods may be more useful to you. They do not
discriminate between ionic and non-ionic contaminants and can thus are better
suited in predicting the reliability of your product.
If you would like any additional information, please let me know,
Graham Naisbitt
Concoat Ltd Email: [log in to unmask]
Alasan House, Albany Park Tel: +44 (0)1276 691100
Camberley, Surrey GU15 2PL UK Fax: +44 (0)1276 691227
-----Original Message-----
From: TechNet On Behalf Of ROBERT MEINERT
Sent: Friday, October 03, 1997 5:03 PM
To: [log in to unmask]
Subject: [TECHNET] MIL-STD Cleanliness spec.
Hello: Need someone to point me in the right direction for a source
of MIL STD 2000A 5.3.5, Cleanliness testing/specification. Or, if
that spec. is obsolete, the replacement and/or equivalent.
thanks,
Robert Meinert
Hitachi Computer Products
Norman, OK
405-360-5500 x174
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