Hi Gang! I'll take a swipe at finding the middle ground on this one! Both Graham and Dave are correct from each of their perspectives - Graham has a multitude of real life use data of AR type conformal coating being used in a number of severe use environments successfully and Dave has been involved in some of the "uglier" aspects of when AR type conformal coating is an incorrect application for a given use environment. Collins published a paper on an investigation comparing AR and Paralyene conformal coating types with BGA style components. The investigation shows both coating types work well and the application method (as other TechNetees have mentioned) can be critical in impacting solder joint reliability. Steve - if I send a copy of the paper can you put it out on your website? Dave Hillman Rockwell Collins [log in to unmask] Steve Gregory <[log in to unmask] To: [log in to unmask] M> cc: Sent by: TechNet Subject: Re: [TN] acyrlic coating deformed BGA balls <[log in to unmask]> 03/23/2004 10:01 PM Please respond to "TechNet E-Mail Forum."; Please respond to SteveZeva Hi Graham, I must say, I find your comments pretty harsh. David Douthit has many publications that are accepted as factual, and he always back-ups everything that he says with documentation that proves what he says is fact. If you can show, or lead us to anything that he says is false, please provide us links, or anything else that would substantiate what you are saying... Best regards, -Steve Gregory- David Your comment is grossly misleading. You cast aspersions on the intelligence of the users --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------