can anyone help me please, i have some questions concerning polyimide pcbs :- 1/ what type of inner layer oxidation is recommended / suitable for polyimide e.g. black, brown, red, reduced etc. ? 2/ what type of hole desmear is recommended / suitable for polyimide ? 3/ we have produced some trial pcbs and are getting slight hole wall pullaway - any ideas as to what might be causing this ? best regards, deron pirie. Deron Pirie Irlandus Circuits Ltd. ################################################################ 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 ################################################################