I heard that somebody try to reduce the thickness of electrical soft gold plating( <20 u"). And somebody try to use immersion gold for gold wire bonding. What's your opinion on this information. Howard Lin Maxedge RD Center > -----Original Message----- > From: (George Milad) [SMTP:[log in to unmask]] > Sent: Thursday, July 16, 1998 8:54 AM > To: [log in to unmask] > Subject: Re: [TN] Immersion gold for wire bonding, a reply > > Gold wire bonding: requires adequate thickness of a compatible metal, > these > may be gold or palladium. Examples are: > Electrolytic Ni with Electrolytic soft gold (>20 uins) > Electroless Ni with Electroless gold (>20 uins) > Electroless NI with electroless Pd (10-15 uins) with immersion gold > flash (1 > uins) > Traditionally immersion gold at < 5 uins has limited success for gold > wire > bonding. > Electroless Ni (150 uins) with Immersion gold (>5uins) is an ideal > finish for > Al wire bonding. The Al wire bonds readily to the underlying Ni. > > George Milad > Technical Mkt Mngr > LeaRonal Inc > > ################################################################ > 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 ################################################################