Ross La Gue, I would like to comment on a couple of issues you make. First, all of the bare board electrical test manufacturers support IPC-D-356. As a matter of fact, they are the ones that wrote to specification, and are responsible to keep it current. There are no plans, nor a desire to support a standard such as EDIF, since it does not support the manufacture of bare boards. What little support it has is inadequate. The second comment has to do with fabricators modifying your gerber data. Each manufacturer has capability requirements for etch, inner layer shrinkage, etc. These factors are facility dependent and cannot be standardized. The designer is intentionally asked to provide nominal data so that each fabricator can adjust for his individual process variables. All fabricators do this. A matter of fact, they have been doing this, long before CAD/CAM. They used to mico-modify hand taped artworks, to correct for process variables. The electronic age has only allowed them to be more efficient, and to keep up with finer line technologies. Regards, Gary Ferrari Executive Director IPC Designers Council **************************************************************************** * The 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. * ****************************************************************************