Abstract
The excimer laser machined diamond has many posts which correspond to the grits on a grinding wheel. This is composed of a large diamond chip (about 2mmx2mm square), which has 10μm high posts that are 3 to 5μm square. The characteristics are : a) high grit distribution density; b) uniform cutting edge; c) uniform grit projection height; d) uniform grit crystallographic orientation; and d) no contamination, because of no heavy metal. Post motion by the ultrasonic excitation achieves an intermittent removal mechanism for a critical depth of cut and, as a result, depending on the number of posts, makes it possible to make a very large total depth of cut in a brittle materials machining.
