Nec Tokin Corporation

Tokin Corporation

Ryowa Electronics Co., Ltd.

Kyodo Kumiai Joint-Labo Sendai

Masahiro Yamaguchi

Hiroshi Ono

Shigeyoshi Yoshida

Masanori Abe

Koichi Kondo

Tatsuya Chiba

Okikuni Takahata

Kenichi Arai

Yutaka Shimada

Katsuji Kaminishi

Yoshio Awakura

Shin Yabukami

Naoki Wakou

Ken-Ichi Arai

Michio Nemoto

Yasunori Miyazawa

Mitsuharu Watanabe

Noboru Saito

Kiichi Itagaki

Atsushi Itagaki

Koichi Fuda

Eiji Yamanaka

Takashi Tamogami

Yukio Sakurada

Hiroshi Takahashi

Takashi Otsuki

Iwao Abe

An electromagnetic noise suppressor including a ferrite film is formed by regularly arranging constituents such as magnetized grains or one analogous to that. In the ferrite film, the constituents have at least one of the uniaxial anisotropy and the multiaxial anisotropy. The ferrite film has the magnetic anisotropy or the magnetic isotropy. The ferrite film is formed by a plating method in the presence of a magnetic field.

Ferrite thin film, method of manufacturing the same and electromagnetic noise suppressor using the same

A ferrite film is formed by regularly arranging constituents such as magnetized grains or one analogous to that. In the ferrite film, the constituents have at least one of the uniaxial anisotropy and the multiaxial anisotropy. The ferrite film has the magnetic anisotropy or the magnetic isotropy. The ferrite film is formed by the use of the plating method in the presence of a magnetic field. Furthermore, an electromagnetic noise suppressor includes the ferrite film.

In a semiconductor bare chip () on the front surface whereof is formed an integrated circuit, a magnetic loss filmis formed on the back surface of that semiconductor bare chip.

Electromagnetic noise suppressor, semiconductor device using the same, and method of manufacturing the same

A magnetic sensor has a monotonic response to high-frequency magnetic strengths in a frequency range up to superhigh frequencies. The magnetic sensor includes a shielded loop coil having a triplate stripline structure. The shielded loop coil has one-turn looped ground patterns formed respectively in a first layer and a fifth layer and connected parallel to each other by a via, and has an inductance L. The one-turn looped ground patterns have end electrodes facing each other across gaps, one of the end electrodes including the via, providing a combined capacitor operable at high frequencies and having a capacitance C. The product L&#xd7;C of the inductance L and the capacitance C is 2.5&#xd7;10or less and the maximum outer circumference length of the one-turn looped ground lines is 50 [mm] or less.

Magnetic sensor, side-opened TEM cell, and apparatus using such magnetic sensor and side-opened TEM cell

In a magnetic sensor having soft magnetic metallic elements disposed in opposite sides of a bridge circuit for sensing an external magnetic field by using a phenomenon where a skin depth of the soft magnetic metallic elements changes in dependence on a strength of the external magnetic field, each of the soft magnetic metallic elements is formed in a zigzag shape having parallel sections extending in a direction of the external magnetic field. The soft magnetic metallic element may have a multi-layer structure where soft magnetic layers are laminated with a non-magnetic insulator layer interposed therebetween.

Magnetic sensor having soft magnetic metallic element formed in zigzag shape

A first substrate having a first electromagnetic noise sensor on its surface perpendicularly intersects with a second substrate having a second electromagnetic noise sensor on its surface, making up an integral structure. A first induced voltage value output from the first electromagnetic sensor at a position thereof directly before driving by a driving means is recorded, and a second induced voltage value output from the second electromagnetic noise sensor at a position thereof at a time of movement of the integral structure for only a predetermined distance by a driving means is recorded. Further, the first and second electromagnetic noise sensors are parallel connected at the position of movement, and a third induced voltage value output from a parallel connected electromagnetic noise sensor is also recorded. Based on the recorded first and second voltage values, an electromagnetic noise level in a vicinity of the integral substrate is determined. The first and second induced voltage values are compared, and based on comparison of the first and second induced voltage values, and whether a larger voltage value from among the first and second voltage values is larger than the third voltage value, a direction of an electromagnetic noise generating source in the vicinity of the integral substrate is computationally determined. The determined electromagnetic noise level and direction of the electromagnetic noise generating source are displayed at a position on a display device corresponding with a position of the first electromagnetic noise sensor.

Electromagnetic noise measurement apparatus

Growing community of inventors

Sendai, Japan

Masahiro Yamaguchi