The high-frequency piezoelectric resonator comprises a quartz plate or disk having a region of reduced thickness which forms a diaphragm and is joined to the remainder of the plate or disk by means of a zone forming a step. A conductive electrode extends from the exterior of the disk or plate to the...http://www.google.es/patents/US4517485?utm_source=gb-gplus-sharePatente US4517485 - High-frequency piezoelectric resonator with reinforced electrode connection
High-frequency piezoelectric resonator with reinforced electrode connection
