Hi Howard - check out the following paper: "Thermosonic Gold Ball Bonding to Immersion Gold/ Electroless Nickel Plating Finishes on Laminate MCM Substrates" , R. Wayne Johnson et al, International Journal of Microelectronics and Electronic Packaging, Vol. 20, Number 3, third quarter 1997, page 317-324. It maybe helpful. I have had some limited success with gold wedge bonding on IM/NI. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] Howard Lin <[log in to unmask]> on 07/15/98 08:46:58 AM Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to [log in to unmask] To: [log in to unmask] cc: (bcc: David D Hillman/CedarRapids/Collins/Rockwell) Subject: Re: [TN] Immersion gold for wire bonding Hi teachers, Has anybody heard about the appllication of immersion gold on wire bonding? Do you think it is possible or not? What is the necessary quality issue of immersion gold for wire bonding? I'd like to know what is the basic quality requirement of immersion gold for wire bonding. Thanks for your help in advance. Best Regards ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################