Hello Robert. > So unless it's essential that the > the hole be completely non-metallic, it's probably best to give it at > least a minimal copper supporting annulus and simply let it get plated.
In my personal experience the need for non plated holes ist mostly for the bigger ones. Here holes with a diameter greater than 5 or 6 mm will not be drilled but milled. So sometimes it might be probably better, to put a circle to the outline layer for milling. The smallest diameter where milling is possible, is two or three millimeters, depending on your manufacturer. With best regards: Bernd Wiebus alias dl1eic -- GMX DSL SOMMER-SPECIAL: Surf & Phone Flat 16.000 für nur 19,99 ¿/mtl.!* http://portal.gmx.net/de/go/dsl
