In the old days when we used the aqueous flux wave soldering process, we
experienced flux entrapment underneath the bad soldermask (even on SMOBC board)
and led to electromigration across traces. For a while we did tape test after
wave. I can't be sure if no-clean process are more forgiving.

Hope it helps.

K.K. Chin
Artesyn Technologies
Fremont,CA
www.artesyn.com




Babis Papadias <[log in to unmask]> on 04/14/99 12:49:07 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      Babis Papadias <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: KK Chin)
Subject:  [TN] Solder Mask Adhesion (Tape test)




Hello

IPC-TM-650 suggests that the solder mask adhesion test (tape test) should
be performed before and after wave soldering test.
Could you please inform me why should the test be performed after wave
soldering test i.e. in what way will the PBA's performance be jeopardized
due to poor solder adhesion  evidenced for example by  solder mask peel off
(after wave soldering).

Thank you in advance.
D. Grafanakis
Athens, Greece.
e-mail: [log in to unmask]

################################################################
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's web site (http://www.ipc.org) "On-Line Services" section for
additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700
ext.312
################################################################

################################################################
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's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################