This doesn't make any sense.  Unless you are going to solder the parts on
with gold you will still have tin/lead solder exposed after reflow or wave.

???????
Ken




 (Embedded
 image moved   Ralph Richart <[log in to unmask]>
 to file:      06/08/2000 11:55 AM
 pic21044.pcx)




To:   [log in to unmask]
cc:    (bcc: Kenneth Kirby/ElectrovertUS/Cookson)
Subject:  [TN] still confused




We have answers....

So I had a long talk with my customer this morning to provide input
based on the invaluable advice from you all.

I said - "is there a specific reason for choosing 3-8u" of immersion
gold over tin/lead solder?"
He said - "absolutely, the gold provides corrosion resistance, the gold
does not"
I said - "even such a thin amount - only 3-8u"?"
He said - "definitely, all we need is the coverage, the thickness is
irrelevant"

Is this true?

Needless to say, we are rebuilding the parts as we speak.  Rework sounds
difficult to say the least, although I may try to come up with some
scheme for fun as they have a bunch of boards that are no good right
now.

thanks for all the help.....

ralph

PS - more on the larrylobster story later; it's more silly than anything
else.  Paul's poem may soon become our own, however.  Very funny!

Off to build some boards....

##############################################################
TechNet Mail List 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://www.ipc.org/html/forum.htm) for
additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################