Hello, Here is another question related to materials in the electronic industry...(I've got millions!) On using conductive adhesives in micro electronics we have found that sometimes the resistivity in conductive adhesives, epoxi and silver flakes, increases upon repeated curing/heating. A test was performed and a resistivity change was recorded upon repeated curing. Some time later the experiment was repeated, under exactly the same conditions as far as we know, but no change in resistivity ocurred. Has anyone experienced the same? What can be done about it? Can it be avoided or is it a "naturally occuring" phenomena? Cecilia Alkhagen ****************************************** Ericsson Microwave Systems AB Production Engineering Development Bergfotsgatan 2 S-431 84 Mölndal Telephone +46 31 747 0000 Direct +46 31 747 0288 Fax +46 31 747 2635 ############################################################## 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 ##############################################################