Hi,

I refer to guru Ellis's book, which one is my 'cleanliness bible'.
 
1. Industrial non-aerospace/military with conventional components : 2
ug/sqcm NaCl

2. Like the above but with SMCs : 1.5 ug/sqcm NaCl

3. Aerospace/military with ultra high impedance requirements : 1 ug/sqcm
NaCl

4. Hybrid circuits : 0.5 ug/sqcm NaCl

5: wafer manufacturing/handling level:  ??

It is interesting to see what wise Brian writes in his comments to these
levels: "Let it be said that the choice of any given limit level value
is arbitrary...."  So, the discussions about fractions of micrograms up
or down may be of only academic interest, but meaningless in industry
daily life. 

Ourselves, we prefer making SIR-tests for PWBs.

It will be interesting to see what you others apply.....

Ingemar Hernefjord
Ericsson Microwave Systems
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Francis Sun
Sent: den 10 augusti 2006 18:11
To: [log in to unmask]
Subject: [TN] Ionic/Chloride contamination levels

Hi Forum,

Can anyone tell me what is the general industry acceptance level for
chloride contamination on a assembled board for a class 2 product
please.
I am getting conflicting statements from 2 evaluation labs.
One says 6.5ug/in2 is acceptable in the industry.
Another says 3ug/in2 is the industry standard or will/should be the
industry standard.

Is there an IPC committee looking at update the acceptable levels?
Thanks in advance for all inputs, opinions and facts

Regards;

Francis Sun
MARK IV Industries
(905) 624-3025 ext. 1235
Fax: (905) 624-4572

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 1.8e
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
-----------------------------------------------------