A new design for high frequency bulk resonators

A method is described for production of high-frequency bulk resonators with frequencies up to 200 MHz operating in the fundamental mode. This method is developed for both AT and SC crystals. The principle of the method is to start with a relatively thick blank bonded to a support, then to thin it, using conventional polishing methods, to the desired frequency, the support being a part of the final crystal unit. In this way the problem of handling and protecting thin blanks is solved easily. The method allows for controlling the resonance frequency during the polishing phase. The present work describes a patent application and some measurements made on resonators manufactured using this method