SAW component used e.g. for a filter or duplexer for a mobile radio telephone system comprises a piezoelectric substrate, a converter electrode arranged on the substrate and having a metallization, and a thin compensation layer

摘要

A SAW component comprises a piezoelectric substrate (S), a converter electrode arranged on the substrate and having a metallization (M) consisting of one or more metals having an average specific density of at least 50 % above that of aluminum, and a thin compensation layer (K) of a material with a temperature dependency of the elastic coefficient which interacts with the temperature path of the substrate. The compensation layer partially or completely reduces the temperature path over the metallization.