ELECTRICAL SURFACE WAVE FILTER

An electrical surface acoustic wave filter with a wafershaped substrate (1) of monocrystalline, piezoelectric material, in particular lithium niobate, wherein one substrate side supports interdigital transducers (IW 1, IW 2) with metallic electrodes mutually engaging in comblike fashion for the stimulation and coupling out of the surface waves and with plastic and/or elastic damping compounds (10, 11) for the suppression of disturbing wave reflections. The damping compound (10, 11) is applied indirectly or directly to the substrate surface between the active interdigital transducer area "b" and the adjacent long substrate edges (4, 5) of at least one interdigital transducer (IW 1), and that at least in the inactive interdigital transducer areas (a, a).