In a message dated 12/1/04 4:36:36 PM Central Standard Time, [log in to unmask] writes: << Selective electroless plating would be the ideal option but I don't think anyone has invented it yet... >> Electroless plating involves a sequence of at least five successive chemical immersion steps. The amount of masking of the rest of the board would make this impractical. Conductive ink is a distinct possiblity as a large number of "inexpensive" double sided boards are produced in the Far East with "Silver Through Hole" paste in all the vias. Denny Fritz MacDermid, Inc. --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------