Use of annular saw for the cutting of quartz resonator blanks and substrates

摘要

The use of a large annular saw with a thin stressed blade for the cutting of tight tolerance blanks is described. Results achieved in full production of AT-cut blanks are reported. The extension of its use to cutting doubly rotated cuts such as the SC cut is also described. The machine is capable of indexing each feed step to maintain thickness control to better than 15 mu m. Coupled with the cut feed mechanism is a blade distortion sensor which detects blade deflection on a continuous analog plot and gives warning of blade wear and the need to redress the diamond cutting edge.