>Greetings ! >The Fab house that we use has recently asked us if they could >use a black oxide treatment on external layers of our designs. >I know that this process is used for internal layers but I want >to know if any of you have used it for external layers ? Their >reason for using it is " To create better adhesion for the >solder mask and eliminate potential slivers ". To me, this >sounds more like a process problem. What do you think ? >To recap, do any of you use a black oxide coating on outer >layers ? If so, > why ?. If not, why not ? I've used oxide on outers in the past for adhesion. Shouldn't hurt anything although the thickness should be reduced to a half or less. "Eliminate potential slivers" sounds like an etching problem. Is thier work ok in general? Is this a difficult mask design? [log in to unmask] Hallmark Circuits Inc., San Diego *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************