IMPROVED GRINDING GUIDE AND METHOD

摘要

A guide for the grinding of a surface of an object having a region to be exposed, including at least two conductive leads and a conductive control track. Each conductive lead is associated with a different face of the object, and the control track interconnects the leads and extends across the surface to be ground which lies between the faces. At least a portion of the rear edge of the track is precisely located with respect to a predetermined grinding depth of the region so that a break in the track occurs with the grinding of the surface to that grinding depth.