MANUFACTURING PROCESS FOR PIEZOELECTRIC RESONATORS AND FILTERS

摘要

electronic engineering. SUBSTANCE: manufacturing process is as follows. Resonating sections of piezoceramic plate are covered with cavity-forming material which is in half-solid state under normal conditions and easily melts at relatively low temperature. Then plate is covered with protective layer of curing resin. Upon exposure to high temperature cavity-forming material is adsorbed into pores of external shell. To avoid incomplete removal of cavity-forming material from plate surface and to maintain desired shape and size of cavities, plates are proposed to be covered prior to producing external protective shell with slurry layer based on fine-grain mineral powder, binder, and water followed by drying this layer under normal conditions to obtain additional solid shell easily absorbing cavity-forming material. Upon exposure to high temperature device is covered with protective resin layer. EFFECT: improved efficiency due to increased yield.