Charles Barker@I-O INC
06/09/98 10:21 AM

Angie,

What kind of terminals? Bifurcated, pierced, turret, or cup? Are they
silver plated, gold plated or solder plated? Or some other plating?
What kind of flux are you using in your soldering operation?

When teaching soldering classes, I found that tarnished silver plated
terminals (turret and bifurcated) were difficult to solder to using R and
RMA fluxes. I never tried a pre-tin with a stonger flux, but that might
work if you can insure sufficient cleaning afterwards.

The pierced terminals usually had a different plating, the composition of
which I do not know for sure. I seldom had a problem with those.

The cup terminals were gold plated and one has to do a gold removal tinning
to avoid gold embrittlement. I don't recall seeing and "tarnished" gold
terminals.

Good luck,
Charlie B.



Please respond to [log in to unmask]; Please respond to [log in to unmask]

To:   [log in to unmask]
cc:    (bcc: Charles Barker/US/I-O INC)
Subject:  [TN] terminals tarnished (dull)




To all,
Looking for some information on terminals. The vendor (fab house) has
installed terminals on the fab and  some are dull and tarnished.  My
quality dept. feels they should be nice and shinny. No where in IPC does
it state the condition of the part.  Can anyone help? Do we need to  tin
the part are they OK?
Thank you in advanced
Angie

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################