Abstract: 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 1013 ?·m or above and 40 or below, respectively.

Abstract: A filter includes a substrate with a relative dielectric constant of 200 or less and a thickness of 0.1 mm or more. A first electrode is disposed on at least one surface of the substrate, a group of second electrodes is disposed on at least the other surface of the substrate. Each of the second electrodes is not in contact with each other and is not in contact with the first electrode. The filter also includes a chip type inductance element. The chip type inductance element has an inductance ranging from 0.1 nH to 30 nH and has dimensions of L1 in length, L2 in width and L3 in height, which satisfy the following conditions; 0.3 mm<L1<2.1 mm 0.1 mm<L2<1.1 mm 0.1 mm<L3<1.1 mm.

Abstract: 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 P1 to P8 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.

Abstract: 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.

Abstract: 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 1013 &OHgr;·m or above and 40 or below, respectively.

Abstract: 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 1013&OHgr;·m or above and 40 or below, respectively.

Abstract: 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.

Abstract: An inductance element providing a high Q factor even with a dawn-sized configuration comprises a column shape body (7), a coil (13) wound around the body (7), a terminal electrode provided at both ends of the body (7), connected with the coil (13), and a protection material (16) for covering the coil (13), which has a relative dielectric constant not higher than 6.0.

Abstract: A chip antenna simple in structure, producing small variation in antenna characteristics between individual antennas, requiring no circuit adjustments, excellent in productivity, and capable of being mounted on a circuit board, as well as a wireless terminal using the same and a method of fabricating the same. 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 height 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 1013 &OHgr;·m or above and 40 or below, respectively.

Abstract: A filter of the present invention comprises a substrate with a relative dielectric constant of 200 or less and thickness of 0.1 mm or more, a first electrode disposed on at least one surface of the substrate, a group of second electrode disposed on at least the other surface of the substrate, each of the group of second electrodes being not in contact with each other and also being not in contact with the first electrode, and a chip type inductance element. The chip type inductance element has an inductance ranging from 0.1 nH to 30 nH and has dimensions of L1 in length, L2 in width and L3 in height, which satisfy the following conditions.