Patent ID: 6848153

Claim:
A method of manufacture of a surface acoustic wave device comprising: a first step of forming on a substrate composed of a piezoelectric material at least an interdigital transducer electrode and a connection electrode connected to said interdigital transducer electrode; a second step of applying with a pressure a photosensitive film resist on the surface of said substrate and forming a photosensitive film resist layer over at least a portion of a surface of said substrate on which an acoustic absorber is to be formed later; a third step of forming acoustic absorbers only at the two sides orthogonal to the direction of the surface acoustic wave transmission by exposing and developing that part of said photosensitive film resist layer which will form acoustic absorbers, and forming a plurality of surface acoustic wave elements on said substrate; a fourth step of placing in a package a surface acoustic wave element obtained by cutting and dividing said substrate and electrically connecting a connection electrode of said surface acoustic wave element with an external terminal of said package; and a fifth step of sealing an opening of said package with a lid, wherein the main surface of said acoustic absorbers is formed parallel to the surface of said substrate.