| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that it is difficult to make the area of a device small, to make the device small by making the height of device small, to further bring about cost reduction and to secure reliability in a conventional surface acoustic wave device. SOLUTION: This surface acoustic wave device comprises a piezoelectric board 101, a comb-shaped electrode 102 provided on one principal place of the board 101 and for exciting a surface acoustic wave, a space forming part 108 provided in the comb-shaped electrode part, a plurality of projection electrodes 104 provided on the one principal plane of the board 101 and terminal electrodes 105 provided facing the one principal plane of the board 101, the projection electrodes 104 are connected directly and electrically to the terminal electrodes 105, and insulating material 106 such as resin base material is filled between the board 101 and the terminal electrodes 105. |
