I am in the middle of an issue concerning a high temperature Laminate and low pull force copper pads. The copper can be pulled from the PWB with low pull forces and are failing in the field. I have examined multiple damaged PWBs and have found that in ALL cases the damage is the failure of the copper to epoxy bond. A good PWB will normally fail within the laminate material. The units are built using Pb-free processes with Pb-free components. I am trying to determine what can be done to show that the laminate is not good or in the PWB manufacturer did not laminage the layers correctly. I do not have easy access to bare PWBs that have not been processed. Any help or direction would be welcomed. Thanks, Mark mark Mark Woolley |PTRL Laboratory | Avaya | 1300 West 120th Ave | Westminster, CO 80234 USA | Voice (Lab): (303) 538-2166 | email: [log in to unmask] | ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------