Hi C&L 1 As you know punch produces clean in and not so clean outer rim . Therefore in theory ; without asking much from the pad on the outer rim you could plate nice barrel from in rim (circuit) side . However ; you'd be shifting the costs dramatically = reeealy not practical . The SS should be sufficient (apart from efficient) if you keep it in mind on design stage : most transformers hold fine on SS P/S's . 2 Yes it is VERY common (don't like it neither) , notoriously most of the P/S's used in C.2 are SS's . Sorry to say so, your custo knows his stuff & budget (be cautious with weak reco) . 3 Somebud's else's cupa , Mr. Concoat or ? cu pk http://www.resmed.com <http://www.resmed.com> -----Original Message----- From: Cory & Lise [mailto:[log in to unmask]] Sent: Friday, 10 December 1999 22:52 To: [log in to unmask] Subject: [TN] Assembly and PCB fab questions Hello Technet 1- We currently produce a PCB assembly on single sided CEM1, punched. Is it possible or has anyone had experience plating holes on this material on a punched PCB? Our thought is that the plating would make the assembly more robust. There is no interest in double sided or even electrical parameters, simply a more robust PCB. 2- This same assembly is manufactured to IPC610 Class 2. Is it common to mfg single sided PCB assemblies to Class 2? It was a customer requirement and we are considering a recommendation to go to a dbl sided PCB if it must be Class 2 3- We are using an acrylic conformal coating applied with a dipping process. Would the thickness information in IPC610 be treated as a minimum or sinply a guideline? Thanks in advance. ############################################################## 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 ##############################################################