发明名称 SURFACE ACOUSTIC WAVE FILTER
摘要 PURPOSE:To improve filtering characteristics by adhering the circuit parts to be connected between lead wires and a grid electrode pair onto a piezoelectric substrate and therefore reducing the area occupied by those circuit parts on a printed board. CONSTITUTION:Lead wires 39 and 40 to be connected to external circuits are formed at the edge of a grid electrode pair 37 of a piezoelectric substrate 31 and at positions toward grid electrodes 35 and 36. Then inductors 41 and 42 are adhered by means of an adhesive 43 of epoxy resin, etc. onto the substrate 31 at the areas between the edges of electrodes 35 and 36 and wires 39 and 40 and with the lengthwise directions of both inductors set coincident with the parallel setting direction of grid electrode pairs 34 and 37. These inductors 41 and 42 are connected electrically to electrodes 35 and 36 as well as wires 39 and 40 respectively through both ends of those inductors. The adhesive 43 functions also as a sound absorbing part and is therefore coated with proper thickness at an area between both inductors where no adhesive is needed.
申请公布号 JPS60218913(A) 申请公布日期 1985.11.01
申请号 JP19840075297 申请日期 1984.04.13
申请人 SANYO DENKI KK 发明人 MURATA NORIO
分类号 H03H9/145;H03H3/08;H03H9/02;H03H9/05 主分类号 H03H9/145
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