Werner, thank you very much. I cannot open it here at work so maybe being block. I will ask my IS group if they will open it. The calculator is what we are seeking. We have a small SMT switch with gold plated gull wing leads. The assembly is 99% lead free so the switch is being soldered using a lead free paste. Jon -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier /* Sent: Wednesday, July 29, 2009 9:50 AM To: [log in to unmask] Subject: Re: [TN] FORMULA FOR DETERMINING GOLD PERCENTAGE IN A SOLDER JOINT There is something called a Gold-Embrittlement 'Calculator' at M. Lau & T. Clifford, "Lockheed Martin Gold Calculator.xls," see: http://circuitassembly.com/cms/content/view/3630/95/ Werner -----Original Message----- From: Steven Creswick <[log in to unmask]> To: [log in to unmask] Sent: Wed, Jul 29, 2009 10:31 am Subject: Re: [TN] FORMULA FOR DETERMINING GOLD PERCENTAGE IN A SOLDER JOINT Guy, You might try to contact Steve Z and see if he has the time to drop it into his site. I'm sure that it can't be all that large of a spreadsheet. Possibly it is already buried there somewhere. I just took a quick peek and did not see something in that line of thought. Steve C -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Guy Ramsey Sent: Wednesday, July 29, 2009 10:23 AM To: [log in to unmask] Subject: Re: [TN] FORMULA FOR DETERMINING GOLD PERCENTAGE IN A SOLDER JOINT Technet does not allow attachments but I have a spreadsheet that I picked up from someone on Technet. It is dated 6/21/06. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Roberts, Jon (SA-1) Sent: Tuesday, July 28, 2009 8:54 AM To: [log in to unmask] Subject: [TN] FORMULA FOR DETERMINING GOLD PERCENTAGE IN A SOLDER JOINT Does anyone have or know where to find the formula for determining the amount of percentage of gold in a SMT solder joint? Appreciate any help, Jon --------------------------------------------------- Technet Mail List provided a s 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 ----------------------------------------------------- This communication is intended only for use by the addressee(s) named herein and may contain business confidential and/or legally privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, disclosure or copying of this e-mail and its contents is strictly prohibited. If you have received this e-mail in error, kindly notify the sender by replying to this message. In addition, please permanently delete the message and any attachments without copying or disclosing the contents. Thank you for your cooperation. THIS DOCUMENT AND/OR SHIPMENT MAY CONTAIN COMMODITY ITEMS, SOFTWARE OR TECHNICAL DATA THAT IS CONTROLLED BY U.S. EXPORT LAW, AND MAY NOT BE EXPORTED OUTSIDE THE UNITED STATES OR TO NON U.S. PERSONS WITHOUT THE APPROPRIATE EXPORT LICENSE FROM EITHER THE U.S. DEPARTMENT OF STATE OR DEPARTMENT OF COMMERCE. --------------------------------------------------- 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 -----------------------------------------------------