A multimode type SAW filter includes a piezoelectric substrate, and IDT groups formed on the piezoelectric substrate, the IDT groups each having multiple IDTs connected in series in which an inputoutput electrode and a ground electrode are coupled via a floating conductor. The stent may include an essentially tubular body formed by a web structure that is composed of a plurality of longitudinally adjacent web rings, each including a plurality of web elements that are disposed circumferentially around the longitudinal axis of the stent and that are adjoined one to the other by a junction bend. The method can further include alternatingly repeating the deposition of the first and second portions until the high-k dielectric film has a desired thickness.