Dave Concerning gold plating. Many Asian shops use what they call "flash gold" which is electro plated gold over nickel. Urmi Ray and I gave a paper at last year's Apex on this technology which has been successfully used be numerous OEMs. Best regards Lee J. Lee Parker, Ph.D. JLP Consultants LLC 804 779 3389 ----- Original Message ----- From: "David Harman" <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, December 29, 2006 1:09 AM Subject: [TN] Questions on ENIG VS gold plating I need some help in understanding. Are specified requirements are emersion gold plate per Mil-G-45204 type 2, gold plating thickness maximum of .00003 inches (30 micro inches) over minimum of .00005 inches (50 micro inches) nickel for our PCB Is this a standard that is used widely, any other recommendations? My supplier has indicated the following. The specifications you listed in your e-mail do not apply to the ENIG finish (Immersion Gold, electroless nickel) Mil -G- 45204 refers to Electroplated Gold, Type 2 is 99.0% purity IPC 6012B Table 3-2 requirements for ENIG are 1.97 u" minimum immersion gold and 118 u" minimum of electroless nickel. Which is a better specification? What would give better quality / reliability? Is there anyway to correlate the two different specifications. Can I correlate ENIG specs, to that of gold plating.? Dave --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 1.8e 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 -----------------------------------------------------