Roger Hammond wrote: > > Scott wrote > > >> > > Ken > > Why the tolerance of +0, -8 instead of +0, -13. It should be ok to plate or solder coat the hole shut. It is not a piece of cake but is doable by a reliabl > Find out their aspect ratio for drill capabilities, desmear or etchback process, and > electroplated copper elongation %. Find out if they are using air bearing spindles at > drilling if they have vibration on their electroless line. > > I agree why not fill the holes. > > Why is it assumed that small hole plating is achieved with old technology I.E. > electroless copper? There are people out there who can and do manufacture 16:1 aspect > ratios in high layer count boards using direct plate systems.( 14 layers in 62 mil and > 24 layers 120 mil) These are the guys you should be talking to. They have already > invested for the 21st. century. Floating shields are than than vibrators in electrolytic copper and pulse plating gives better throwing power. > > Roger Hammond ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################