I've never heard/read anything about uncured soldermask either. I've got a pretty good *.PDF file authored by Nicholas Biunno of Hadco, and presented at the '99 IPC Printed Circuits Expo that doesn't mention anything about soldermask...is this something new? -Steve Gregory- > Bruce: > > My understanding of Black Pad was it is caused by too much phosphorus in > the nickel (as I recall) plating bath. > Solder mask contamination is a new one for me. > With mask going on after the gold, how does it contaminate the nickel? Mask > should not come in contact with the nickel at all in my experience > > I am interested in learning all nuances of black pad causation. > Would appreciate your comments. > > Charlie McMahon > --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------