I also agree with Mr. Wenger. I have tons of experience with both Immersion Silver and ENIG. I have also used immersion tin, HASL, and OSP finishes extensively. I have never had any trouble with immersion silver. I have had trouble with the others, especially ENIG. No matter what anyone says, there are tons of instances where reliability issues came up with ENIG. These are well documented, as are the root causes. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ofer Cohen Sent: Sunday, September 25, 2005 11:43 PM To: [log in to unmask] Subject: Re: [TN] lead free PCB Replacement Coatings Bill, I agree with George, and can add only that while calling colleges about experience with surface finish listen carefully to those who were experience with some types. Ofer Cohen Seabridge - a Siemens company ________________________________ From: TechNet on behalf of Wenger, George M. Sent: Sun 9/25/2005 6:51 PM To: [log in to unmask] Subject: Re: [TN] lead free PCB Replacement Coatings Bill, Those who like ENIG (Electroless Nickel under Immersion Gold) are going to tell you it's great and there should be no problems with using it with SAC305 and VOC-Free flux. Those who use IAg (Immersion Silver) are also going to tell you it's great and there should be no problems with using it with SAC305 and VOC-Free flux. I'm one of those who use IAg and believe that it is a good surface finish for standard SnPb assembly or Pb-Free assembly. If I were to tell you about the potential problems with using ENIG there would be those out there who would tell you that there aren't any problems. I would suggest that you not listen to any PCB fabricator who can only provide with one or the other and I also wouldn't listen to any supplier who sells surface finish chemistry. Ask as many PCB users as you can and find out what their experience has been with different surface finishes and then make an informed decision. As I indicated, IAg is the surface finish we prefer. But as I indicated I'm only one user. Regards, George George M. Wenger, Andrew Corporation Reliability / FMA Engineer Base Station & Subsystems Group 40 Technology Drive, Warren, NJ 07059 (908) 546-4531 [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask] Sent: Sunday, September 25, 2005 12:32 PM To: [log in to unmask] Subject: Re: [TN] lead free PCB Replacement Coatings To All: Have have read many articles regarding what folks are recommending as replacement coating for HASL. What are folks experiences with Electroless Gold and also Electroless Silver? Is one substantially cheaper than the other? Are there benefits of one over the other? Will either cause any potential problems when using SAC 305 and a VOC free flux? Thanks in advance for help with these issues!!!!!! Bill Black Q.A. Manager Medco 631-667-9699 [log in to unmask] (mailto:[log in to unmask]) --------------------------------------------------- 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 ----------------------------------------------------- ------------------------------------------------------------------------ ------------------------ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any unauthorized use of this email is prohibited. ------------------------------------------------------------------------ ------------------------ [mf2] --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------