That well could be. The penetration depth is only around 1 micron. Regards, Vladimir ----- Original Message ----- From: TechNet <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Sent: Wed Mar 19 17:30:54 2008 Subject: Re: [TN] Case of the popping BGAs I have a hard time believing that at 10kV Werner, I have a hard time believing that at 10kV acceleration potential that they see only the SnNi IMC and very little of the SnPb solder behind the IMC. Regards, George George M. Wenger Andrew Wireless Solutions Senior Principal FMA / Reliability Engineer 40 Technology Drive, Warren, NJ 07059 (908) 546-4531 [Office] (732) 309-8964 [Cell] [log in to unmask] ________________________________ From: [log in to unmask] [mailto:[log in to unmask]] Sent: Wednesday, March 19, 2008 5:15 PM To: Wenger, George M.; [log in to unmask] Subject: Re: [TN] Case of the popping BGAs Hi George, From my experience, what they seeing on the ball side is pretty much SnNi IMC. What i find missing is any Au. Werner ************** Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aol hom00030000000001) ------------------------------------------------------------------------------------------------ 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 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 -----------------------------------------------------