Abstract: The present invention concerns an electroacoustic filter (1), comprising an electrode (2) having a main layer (6) which consists of a metallic material comprising an alloy of copper and molybdenum. According to a second aspect, the present invention concerns a method of manufacturing an electroacoustic filter (1), comprising the steps of: providing a substrate (3), sputtering a metallic material comprising an alloy of copper and molybdenum onto the substrate (3), annealing the metallic material, and pattering the metallic material to form a main layer (6) of an electrode (2).

Abstract: A surface acoustic wave device according to the present invention includes a piezoelectric monocrystal substrate 10, and an interdigital electrode 20 configured of a base electrode layer 21 formed on the piezoelectric monocrystal substrate, the base electrode layer 21 being made of a conductive material, and an aluminum-containing main electrode layer 22 formed on the base electrode layer by epitaxial growth. The electrode 20 has an upper layer 23 formed on the main electrode layer 22, and the upper layer 23 is made of a conductive material that is different from materials for the main electrode layer and the base electrode layer and has a larger specific gravity than aluminum.

Abstract: A surface acoustic wave device according to the present invention includes a piezoelectric monocrystal substrate 10, and an interdigital electrode 20 configured of a base electrode layer 21 formed on the piezoelectric monocrystal substrate, the base electrode layer 21 being made of a conductive material, and an aluminum-containing main electrode layer 22 formed on the base electrode layer by epitaxial growth. The electrode 20 has an upper layer 23 formed on the main electrode layer 22, and the upper layer 23 is made of a conductive material that is different from materials for the main electrode layer and the base electrode layer and has a larger specific gravity than aluminum.

Abstract: A T-shaped pole tip portion of an upper pole of a write element for a magnetic disk drive is provided. One end of the pole tip portion, constituting the bottom of the “T,” forms a narrow nose segment at an air bearing surface, while a wing segment at the opposite end of the pole tip portion constitutes the cross-bar top of the “T.” A transition segment extends between the nose segment and the wing segment. A yoke portion of the upper pole includes a surface that is parallel to the air bearing surface and recessed therefrom by a P3R depth. The transition segment does not widen significantly until after the P3R depth, accordingly, the wing segment is recessed from the air bearing surface by more than the P3R depth.

Abstract: A spin-valve magnetic transducing element. In one embodiment, a spin-valve magnetic transducing element is disclosed in which a ferromagnetic tunneling junction film, including first and second ferromagnetic layers and an insulating layer is enclosed between the ferromagnetic layers. A nonmagnetic metal thin film is inserted between the second ferromagnetic layer and the insulating layer, all of which are formed on a substrate.

Abstract: A compound thin film magnetic head in which the upper shield of the readout MR head also serves as the lower magnetic film of the write inductive head. The upper shield has a layered structure including a shield part of soft magnetic material functioning as a shield to magnetically shield the MR head, a lower pole part and transition part of soft magnetic material functioning as a write magnetic pole opposing the upper pole of the inductive head, and a nonmagnetic separation layer to magnetically separate these. Between the lower pole part and the transition part, an additional nonmagnetic separation layer can be provided. The shield part can be configured from multiple magnetic films formed in layers and enclosing a nonmagnetic separation layer.

Abstract: A composite type thin-film magnetic head. In one embodiment, a substrate is used as a base, and an insulating film, a lower shielding magnetic film, a magneto-resistive element, an upper shielding magnetic film, a magnetic gap film, a recording inductive magnetic film and a protective layer are laminated on this base. An inductive head used for recording is formed by the upper shielding magnetic film. A magnetic gap film, a recording inductive magnetic film, and a magneto-resistive head used for playback are formed by the magneto-resistive element. The upper shielding magnetic film and recording inductive magnetic film are formed by an electroplating of permalloy. The upper shielding magnetic film has a lower nickel concentration on the side of the magnetic gap film than on the side of the magneto-resistive element.