Murata Manufacturing Co., Ltd.

Takayuki Hirotsuji

Tetsuya Morinaga

Masahiro Bando

Takaomi Toi

Koki Sasaki

Tetsuo Hatakenaka

Kazuo Kasahara

Toshimi Kaneko

Hidetoshi Yamamoto

An electronic device such as a chip coil including an electric wire firmly connected to electrodes in a highly reliable fashion is constructed to be mounted on a printed circuit board or substrate in a stable and reliable manner. At both ends of a core of the chip coil, there are provided electrodes having a multilayer structure including a high-conductivity layer made of Ag, Ag&mdash;Pd, or a similar material; a solder barrier layer made of Ni; and an easy-soldering layer made of Sn or solder. End portions of the electric wire are embedded in the easy-soldering layer so that the resultant electrode structure has a substantially flat surface. A thermo-compression process is performed so that the end portions of the electric wire are connected to the solder barrier layer via solid welding and to the easy-soldering layer via brazing.

Electronic device having electric wires and method of producing same

An electronic device such as a chip coil including an electric wire firmly connected to electrodes in a highly reliable fashion is constructed to be mounted on a printed circuit board or substrate in a stable and reliable manner. At both ends of a core of the chip coil, there are provided electrodes having a multilayer structure including a high-conductivity layer made of Ag, Ag--Pd, or a similar material; a solder barrier layer made of Ni; and an easy-soldering layer made of Sn or solder. End portions of the electric wire are embedded in the easy-soldering layer so that the resultant electrode structure has a substantially flat surface. A thermo-compression process is performed so that the end portions of the electric wire are connected to the solder barrier layer via solid welding and to the easy-soldering layer via brazing.

A filter array includes a dielectric unit with a plurality of individual electrodes formed on one main surface and a common electrode on the other main surface. The individual electrodes are formed at predetermined intervals so as to extend across the dielectric unit in a direction of a width of the dielectric unit. Since each of the individual electrodes and the common electrode face each other, they form with the dielectric unit, a plurality of capacitance elements. To both ends of each of the individual electrodes, input and output terminals are respectively connected. The input and output terminals project outward from the dielectric unit. A conductive plate is joined to the common electrode, and common terminals are integrally formed on the conductive plate so as to extend outward in a direction of the width of the dielectric unit. Each of the pairs of input and output terminals are inserted and connected to respective signal lines and the common terminals are connected to ground.

Filter array having a plurality of capacitance elements

Growing community of inventors

Fukui-ken, Japan

Takayuki Hirotsuji