Hi Leland, Soaking in water is nowhere near as effective than exposure to high RH air for moisture absorption into PCBs and components. Werner -----Ursprüngliche Mitteilung----- Von: Leland Woodall <[log in to unmask]> An: [log in to unmask] Verschickt: Mi., 26. Mai. 2010, 21:31 Thema: [TN] MSD Devices and Popcorning Just on a note of curiosity, how many folks out there are using a ophisticated RFID process to track their MSD exposure times? We're using a manual system, and lately I've had a couple of people nquiring about moving to something much more expensive. In my ten ears here, we've never seen either an internal nor external failure due o popcorning, micro cracks in our devices, or anything along those ines. A few years ago, I took 10 scrap ICs and soaked them in a glass of water ver a four day weekend. When we returned on a Tuesday, I pulled them ut, dried the surfaces off, and sent them through a lead free process eflow oven on a bare board. After everything I'd read and investigated, I expected them to explode. I performed an intense examination of both sides of the components under 00X magnification, and I was extremely surprised to see no incidents of opcorning nor package cracks. I then checked them in our X-ray achine, and saw no evidence of any bond wire detachments. Has anyone conducted a similar experiment with dissimilar results? I'm just wondering if we're making a mountain out of a mole hill here... Thanks, Leland ______________________________________________________________________ his email has been scanned by the MessageLabs Email Security System. or more information please contact helpdesk at x2960 or [log in to unmask] _____________________________________________________________________ --------------------------------------------------- echnet Mail List provided as a service by IPC using LISTSERV 15.0 o unsubscribe, send a message to [log in to unmask] with following text in he BODY (NOT the subject field): SIGNOFF Technet o temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) o receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest earch the archives of previous posts at: http://listserv.ipc.org/archives lease visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for dditional information, or contact Keach Sasamori at [log in to unmask] or 47-615-7100 ext.2815 ---------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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 -----------------------------------------------------