'netters:

I have a general question for those folks out there who do J-Std-001C, class
3 work. We use fluxes that are stronger than the "allowed" L0 or L1 activity
levels. Because of this I had to "qualify" our process per Appendix B of the
J-Std-001C. This according to J-Std-001C, paragraph 4.2b. The cost of doing
this test, including materials, labor and whatever is approximately $7000.

Now I have a couple of questions...

1) If one of the solder pastes that you qualified is no longer available, do
you have to do a re-qualification if the manufacturer of the paste suggests
a new material? (This implies a material change)

2) If you swap out a spray fluxer for a foam fluxer or apply flux with a
different method at the wavesolder machine, do you have to do a
re-qualification? (This implies a process change)

I suspect the answer to both questions is yes. With the number of possible
changes within a soldering process, it seems inevitable that process
qualification and re-qualification could happen on a regular basis due to
circumstances beyond your control.

So are the class 3 guys out there either doing regular qualification testing
or are you all using L0 or L1 (no clean/Rosin) fluxes.

Is there anyone out there who participated in the writing of this section
who can shed some light on the thought process behind this section of the
spec.

Thanks to all respondents.

Bill Kasprzak
Moog Inc. Manufacturing Engineering, Electronics

---------------------------------------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------