Gaby, et al Don't forget that IPC also has a leadfree website http://www.leadfree.org and we are hosting a leadfree e-mail forum (like technet) also. More info on that website. jack >>> Gabriela Bogdan <[log in to unmask]> 10/17/99 03:00PM >>> Dear TechNetters! Please could you comment on the use of Tin/Gold 90/10 solder ? The application is for microwave applications when soldering to gold. Its melting temp. is 217C . I have the following questions: How does this composition correlate with the maximum gold content in a solder joint? Would it be possible to pass such a subassembly through a secondary reflow with 63/37 Tin/Lead? Is it recommended ONLY for soldering to gold? It must be very expensive too??!! Paul, Werner, my apologies. Thank you Gaby ############################################################## 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 ############################################################## ############################################################## 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 ##############################################################