What concentration of HCl is used? Ryan >-----Original Message----- >From: Larry Tawyea [SMTP:[log in to unmask]] >Sent: Tuesday, December 21, 1999 11:52 AM >To: [log in to unmask] >Subject: Re: [TN] HCl clean of Ni/Au plating > >In a message dated 12/21/99 11:20:32 AM Central Standard Time, >[log in to unmask] writes: > ><< Hello Technetters, > > Is HCl clean of the nickel pads sometimes a step in the Ni/Au > plating process? If it is, why is it done? > >> > >Craig, > >When you say plating the nickel pads I'm going to assume you are doing a >selective plate as opposed to a pattern plate, In this case there are >process steps between the nickel and gold plate. The purpose of the HCl >clean is to remove the nickel oxide that forms very quickly when the nickel >is exposed to air. Hope this answers your question. > >Larry Tawyea > >############################################################## >TechNet Mail List 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://www.ipc.org/html/forum.htm) for additional >information. >If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or >847-509-9700 ext.5365 >############################################################## ############################################################## TechNet Mail List 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://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################