I don't know what the latest and greatest is but about 5 years ago I looked at Shiply's Solderposit. It is not a true electroless process but an immersion process. That is, each atom of deposited metal displaces an atom of copper. The copper provides the electrons for the reduction of the tin/lead metal rather than a reducing agent like formaldehyde in electroless copper. In theory, all you have to provide is enough extra copper to be oxidized and still have enough for the board's requirements. In truth, it seemed there was a lot more than a one-for-one removal. On the positive side, it deposited more than 0.0002" of solder that was 60-70% tin. Immersion tin baths are available from several vendors. Shiply, Enthone and MacDermid come to mind. The baths I've had experience with generally would not deposit much more than 0.0001". Because immersion baths are constantly dissolving copper for the replacement reaction, they are self poisoning and the stannous tin will tend to oxidize in the bath over time. -----Original Message----- From: [log in to unmask] [SMTP:[log in to unmask]] Sent: Wednesday, May 06, 1998 3:32 PM To: [log in to unmask] Subject: [TN] Electroless Solder Plating Solution From: Dennis J Fall@TFT on 05/06/98 02:31 PM To: [log in to unmask] cc: Subject: Electroless Solder Plating Solution Can anyone give me some info on an electroless solder plating/tinning solution. I know that something has to exist. Thanks -- Dennis Fall Thin Film Technology Corporation 1980 Commerce Drive North Mankato, MN 56003-1702 Phone: 507-625-8445 x17 Fax: 507-625-3523 http:\\www.thin-film.com mailto:[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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################