Steve, I always have an interest on papers written on the ENIG process or BLACK PAD. If possible can you share this PDF file with me and/or the community. Victor, -----Original Message----- From: Steve Gregory [mailto:[log in to unmask]] Sent: Monday, July 22, 2002 11:21 AM To: [log in to unmask] Subject: Re: [TN] Au-Ni coating 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 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------