Heinz, We use the same chemistry as you and are also processing prior to soldermasking. For some yet unknown reason , baking the boards at 120 deg C for 1 hour has solved the skip-plating problem here. regards Torben Osteraa Printca AS -----Original Message----- From: Heinz Mader [mailto:[log in to unmask]] Sent: Wednesday, January 31, 2001 9:17 AM To: [log in to unmask] Subject: [TN] electroless nickel gold stepplating problems Hallo outhere in th big pcb world We have a plating problem with PCB ,we plate full electroless nickel gold ,that means without solder mask. The problem is,.that from time to time we have stepplating of nickel This happens only on two types of boards,others boards we plate the same way and there it never happens stepplating. We work mith the Ronamerse SMT-Process from Shipley We have no problems with skip plating in selektiv nickel gold I hope for good ideas hopefull greetings from switzerland Heinz Mader Ascom AG CH 3000 Berne Switzerand ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------