We have about 30 PWB's (some completely assembled and coated) that need to have a trace interrupted on the fourth layer (this is a 12 layer board). Whatever tool is used to perform the interruption (drill or end mill) cannot penetrate the board beyond the 5th layer. Does anyone know of an organization that performs this kind of service?? Please respond via E-Mail. Bob Hawkins Manufacturing Engineeer EFW Inc. [log in to unmask] *************************************************************************** * 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. * ***************************************************************************