PRODUCTION OF FILTER FOR SURFACE ACOUSTIC WAVE

摘要

PURPOSE:To obtain a highly reliable and mass-productive surface acoustic wave filter by forming a space over the surface of a surface acoustic wave filter element on which surface acoustic waves are transmitted. CONSTITUTION:The surface acoustic wave filter element 13 mounted on a lead frame 12 is covered with a thermally adhesive tape 18 (an adhesive tape or a tape coated with a thermosetting resin) so that a space is kept at least over the surface on which surface acoustic waves are transmitted. The peripheral part of the tape 18 is thermally melted and adhered so as to keep the periphery of the element 13 airtightly and the whole element is molded with a resin 19.