Matsushita Electric Industrial Co., Ltd.

Kenzo Isozaki

Hiromi Sakita

Katsumi Sasaki

Kuniaki Kiyosue

Masatoshi Izaki

Takahiro Mukai

Mitsuo Kanmera

Masanobu Kuroki

Shinichi Ohtsuka

Kengo Shiiba

Kazuhide Goto

Makoto Yoshinomoto

Kazuhiro Takeda

Kazuhiro Eguchi

Takumi Naruse

A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 10&#x3a9;&#xb7;m or above and 40 or below, respectively.

Chip antenna, radio communications terminal and radio communications system using the same and method for production of the same

Fuse

Filter

An electronic component which comprises a substrate, conductive film on the surface of the substrate, a groove created on the conductive film, a protective material covering the groove, and terminals and on both ends of the substrate. Lengths P to P of the terminals and, the surface roughness and materials of the terminals and, and configuration of the protective material are specified for providing an electronic component and radio terminal with at least one of improved productivity, mountability, and characteristics.

Electronic component and radio terminal using the same

A thermal fuse reduced in size and thickness can be obtained. Further, the thermal fuse will not be degraded in characteristics, productivity, reliability, quality, etc. even after reduction in size and thickness. The thermal fuse includes a fuse main body including a substrate, a fusible metal and a cover, and paired terminals disposed protruding from the fuse main body. The other end of the first terminal has a first fusible metal connection, and the other end of the second terminal has a second fusible metal connection. The fusible metal is disposed between the first terminal and the second terminal, and one end of the fusible metal is connected to the first fusible metal connection, and the other end of the fusible metal is connected to the second fusible metal connection. The cover is disposed so as to cover the fusible metal, the first fusible metal connection, and the second fusible metal connection. Length L and thickness L of the fuse main body located between the first terminal and the second terminal are respectively in the ranges of 2.0 mm<L <8.5 mm and 0.4 mm<L <2.5 mm.

Thermal fuse, battery pack, and method of manufacturing thermal fuse

A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 10 &OHgr;&middot;m or above and 40 or below, respectively.

An inductance element providing a high Q factor even with a dawn-sized configuration comprises a column shape body ( ), a coil ( ) wound around the body ( ), a terminal electrode provided at both ends of the body ( ), connected with the coil ( ), and a protection material ( ) for covering the coil ( ), which has a relative dielectric constant not higher than 6.0.

Inductance element

Growing community of inventors

Miyazaki, Japan

Kenzo Isozaki