All; I am looking for some help in selecting material for a PCB we are designing to go into 85/85 (85°C / 85% humidity), aging (85°C dry bake), and temp cycle (-40°C to 85°C) ovens. I know that there are dozens of options out there for fabricating boards that will survive this, but I'm sure that some of them are considered standard processes that can be obtained inexpensively, and some of them more exotic. Could any of you offer some guidance? One of my biggest concerns is the metallization in the high-humidity environment. I think that copper could cause some serious problems here... but under a mask and with SnPb on all the exposed areas, maybe I'm wrong. Each of the boards must last a minimum of 1000 hours at these conditions, although several thousands of hours is obviously preferable, so that they can be reused. Any help provided would be greatly appreciated. Regards Bob Torres Roberto Torres CENiX Inc. 5141 California Ave, Suite 150 Irvine, CA 92612 Email: [log in to unmask] Tel: 949-428-2672 Fax: 949-428-2671 --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------