Wisol Co., Ltd.

Dong Jun You

A SAW filter includes a substrate, an upper bus bar arranged on the substrate, a lower bus bar arranged on the substrate so as to face the upper bus bar, a first finger IDT arranged so as to be connected to the upper bus bar at one end, a second finger IDT arranged so as to be connected to the lower bus bar at one end, a passivation part formed on the first finger IDT and the second finger IDT, a first metal part formed on the passivation part and including all area of the upper bus bar and a partial area of the first finger IDT, and a second metal part formed on the passivation part and including all area of the lower bus bar and a partial area of the second finger IDT.

Surface acoustic wave filter having metal parts on a passivation part

The present invention relates to a capacitor for a SAW filter, the SAW filter, and a method of manufacturing thereof, and more specifically, to a capacitor for a SAW filter including a first metal layer formed on a substrate; an insulation layer formed on the first metal layer; and a second metal layer formed on the insulation layer and overlapped with partially or totally of the first metal layer, in which the insulation layer is formed to be extended to the top of an IDT formed on the substrate, the SAW filter on which such a capacitor for a SAW filter is mounted, and a method of manufacturing thereof.

Growing community of inventors

Suwon-si, South Korea

Dong Jun You