I don't belive that you will find any long term relability studies on dewetting because no one in there right mind would ever send these boards to a customer to see how long a known defect would last. You can however have some joints micro sectioned to determine if they are indeed good joints. But again this is just going to tell you what you already know, (That you have a board solderability problem). I hope that your upper mangement will understand that the engineering and quality groups are responsible for the process specifications and quality of the board, NOT purchasing. Good luck and I belive that all on the technet will agree that you are correct and these boards are rejects. Ken Kirby (Embedded image moved Kathy Palumbo <[log in to unmask]> to file: 07/28/99 12:12 PM pic27529.pcx) To: [log in to unmask] cc: (bcc: Kenneth Kirby/ElectrovertUS/Cookson) Subject: [TN] Dewetting Issues Currently we are experiencing a lot dewetting issues on our HASL coated boards. When tested in house they failed IPC solderability testing, and when tested at two outside independent labs they failed solderability testing at both labs. The problem we are having is our purchasing department still thinks we are full of it and will not support us in returning the boards to the board house, and naturally the board house is taking our purchasing departments side and will not take the boards back now. Both our purchasing department and the board house are claiming "there is no long term reliablity issues with dewetting". Naturally my M.E. and Q.E. group disagree with their statement. What I am looking for is long term reliability studies regarding dewetting on typical HASL coated FR4 PCB material. Does anyone out there know of any such studies, or can you steer me in the right direction? Thanks for you help in advance! Sincerely, Kathy Palumbo ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################