Abstract: A surface acoustic wave device includes a substrate, a first electrode and a second electrode formed on the substrate to extend along a first direction, wherein the first electrode and the second electrode are alternately disposed along the second direction, one end of the first electrode on one side of the first direction is aligned along the second direction, and one end of the second electrode on the other side of the first direction is aligned along the second direction, a temperature compensation film which covers the first electrode and the second electrode, a first additional film formed on the temperature compensation film to vertically overlap a partial region from the one end of the first electrode on the one side of the first direction, and a second additional film formed on the temperature compensation film to vertically overlap a partial region from the one end of the second electrode.

Abstract: A surface acoustic wave device includes a substrate, a first electrode and a second electrode formed on the substrate to extend along a first direction, wherein the first electrode and the second electrode are alternately disposed along the second direction, one end of the first electrode on one side of the first direction is aligned along the second direction, and one end of the second electrode on the other side of the first direction is aligned along the second direction, a temperature compensation film which covers the first electrode and the second electrode, a first additional film formed on the temperature compensation film to vertically overlap a partial region from the one end of the first electrode on the one side of the first direction, and a second additional film formed on the temperature compensation film to vertically overlap a partial region from the one end of the second electrode.

Abstract: A surface acoustic wave device includes: a substrate; an electrode disposed on the substrate in a first direction; a dummy bar disposed to be spaced apart from the electrode by a predetermined distance in the first direction; and an additional film formed on the dummy bar, wherein the electrode and the dummy bar are disposed in plurality in parallel in a second direction perpendicular to the first direction, and the dummy bars are alternately disposed on a left side or a right side of the electrode to be spaced apart from the electrode by the predetermined distance, and the additional film is formed on the predetermined distance between the electrode and the dummy bar and on the plurality of dummy bars.