Hi All: I need some help on the general characteristics of dry film & LPI solder mask. Specifically, is there any significant difference in the dielectric of DF and LPI? What are the typical dielectric values associated with each and do these values vary or change as a function of the type of process used for pwa assembly. Thanks in advance. Jim Moffitt ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################