Franis, In question 2 what is the specified thickness in the PTH? Thanks Richard -----Original Message----- From: Francis Lai <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Date: Saturday, October 31, 1998 10:31 AM Subject: [TN] Copper plating & Copper thickness >Dear Sir : > >I work inn a high frequency PCB manufacturing company and I have the > >following questionns : > >1/ Why is it for copper plating (acid copper plating) the lower the > current, the more the throwing power ? If I start to plate copper > on the PTH walls with high current density after PTH, what will > happen ? > >2/ Our customer always specify to have a certainn thickness innside the > PTH walls for copper. Why is that so for high frequency PCB ? > What happen if copper thickness is thinner than the specified > thickness at high frequencies ? > >Thanks for your help !!!!!!! > >my e-mail : [log in to unmask](this is only text base, pls do not send > graphics) > >Thamks again!!!!!!! > >Francis > >################################################################ >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's web site (http://www.ipc.org) "On-Line Services" section for additional information. >For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 >################################################################ > > ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################