Sumitomo got patent on played bondable copper wire. Not Al. For large size like you stated. Almost like magnet wire, which is bondable use ultrasound. -------------------------- Sent using BlackBerry ----- Original Message ----- From: TechNet <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Sent: Mon Jul 14 17:33:33 2008 Subject: Re: [TN] Plated Wire in Wedge Bonding Hello Scott, Do I read it right that you want to plate aluminum bonding wire with another metal and that the wires are 300 microns in diameter? I have not heard of such but perhaps someone else has. Is there a reason why you cannot encapsulate the wires after bonding to address oxidation concerns? There are also some folks out there who have developed insulated wire that is bondable and there are as well some methods from earlier years such as stitch wire and/or resistance welding of ribbon wire that might be of interest. But it might be best to talk to some of the heavy gage wire bonding equipment suppliers to gather their experiences. Good luck Joe In a message dated 7/14/2008 11:49:41 A.M. Pacific Daylight Time, [log in to unmask] writes: Hello. New to the list and wedgebonding. Searched the archives. I saw posts about bonding to plated pads on boards, but saw nothing on using or bondability with plated wires. I must avoid any oxidation on the wires. I'm trying to find out successes, feasability and wire suppliers for plated aluminum wire. Gold plating is the best for the outer coating for me. From what I've read its actually 150 microinches Ni over 5-8 microinches of Au. Also from what i've read, the nickel is doing the actual bonding. The wire is .012" or 305 um diameter. Pure gold it out of the question! :) The bonding surface is copper etched PCB, or sometimes gold plated brass. Both proven to bond well with pur AL wire. Thank you! --Scott --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 ----------------------------------------------------- **************Get the scoop on last night's hottest shows and the live music scene in your area - Check out TourTracker.com! 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