That's an issue a LOT of components have magnetic materials in them - in some cases the lead frames, nickel barriers on R's and C's etc. I think you might have to live with it and calibrate the design to a zero condition based on the sensed field of the final assembly. John John Burke (408) 515 4992 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stolar, Paul W Sent: Wednesday, June 13, 2007 8:46 AM To: [log in to unmask] Subject: Re: [TN] Plating I should tell a little more about the application. This is not RF, it is a magnetic sensor. Any magnetic materials nearby mess up the readings. Paul Stolar Materials/Reliability Engineer Manufacturing Reliability Lead Engineer Baker Atlas 713-625-5376 713-625-4949 (fax) -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman Sent: Wednesday, June 13, 2007 9:05 AM To: [log in to unmask] Subject: Re: [TN] Plating Hi Wayne! Just a word of caution - gold and silver do not necessarily play well together. The connector industry unsuccessfully tried to use a gold over silver plating scheme that resulted in corrosion, intermittent contact and solderability issues. I would advise caution if a design team is contemplating using a gold/silver plating combination. Dave Hillman Rockwell Collins [log in to unmask] Wayne Thayer <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 06/12/2007 06:12 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Wayne Thayer <[log in to unmask]> To [log in to unmask] cc Subject Re: [TN] Plating I love crazy apps! Will you share that with us? The tiny amount of Nickel used I have never heard of causing a problem before. Obviously, silver is compatible with copper, and I believe that silver and gold get along pretty well together too. So maybe gold on silver. Probably need to put shorting bars on so you have the flexibility of electroplating. Wayne Thayer >>> [log in to unmask] 6/12/2007 5:37:46 pm >>> We are using nickel as a barrier metal on a PC board for the pads. Are there any other barrier metals we can use which are non-magnetic. Bare copper is not an option. Paul Stolar Materials/Reliability Engineer Manufacturing Reliability Lead Engineer Baker Atlas 713-625-5376 713-625-4949 (fax) --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------