Hi Blair
There are always other options!  What's your budget???  I'm sure Bev and
Inge could give you analysis down to the last molecule...

ROSE is a good process monitoring tool.  IMHO, its biggest weakness is
that it does not tell you what type of ionic contamination you've got -
which is an important distinction.

My preference is to use ion chromatography testing to determine what's
on the assembly in what quantity.  When you are content with those
results, a ROSE test on the same product made the same way will give you
a benchmark.

regards,
 - Graham

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Blair Hogg
Sent: Friday, October 30, 2009 10:40 AM
To: [log in to unmask]
Subject: [TN] Cleanliness

A ROSE by any other name would smell as sweet, right SIR?

Happy Friday, Technetters! As you may have guessed, I've spent a bit of
time 
over the last few days looking over cleanliness testing specs, searching

through the archives and what not to get more information on the
different 
types of testing. Now it is time to visit the well of knowledge and see
if the 
Technet gurus can help me along the road to cleanliness enlightenment.

From what I understand, the ROSE test measure the change in resisitivity
/ 
conductivity of a test solvent solution (75% IPA / 25% DI Water) that is

rinsed over a board / assembly. This will detect contaminants and
provide a 
relative level of the contamination. However, it will only detect those 
contaminants that are ionic in nature or will affect the resistivity (is
that 
redundant?). The results are near immediate.

The SIR test measures the insulation resisitance change that occurs when
an 
assembly is exposed to humidity and voltage, and thus has the capability
of 
detcting the presence of contaminants that may not be ionic, but can
cause 
corrision and / or dendrites to grow. The drawback is that the samples
must 
be exposed to controlled humidity / temperature for a priod of time. 

Does that sound right? Am I missing anything? 

Are there any other options?

Thanks,

Blair

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------