Abstract: In a common mode choke coil having a magnetic core, a decrease in peak value of a common mode impedance in a vicinity of its resonance frequency is suppressed. A common mode choke coil includes a non-magnetic layer, a first magnetic layer formed on a top surface of the non-magnetic layer, a second magnetic layer formed on a bottom surface of the non-magnetic layer, a magnetic core provided between the first magnetic layer and the second magnetic layer so that its axis extends in a top-bottom direction, a first coil conductor embedded in the non-magnetic layer and wound around the magnetic core, a second coil conductor embedded in the non-magnetic layer and wound around the magnetic core, and a first magnetic gap provided between a top surface of the magnetic core and a bottom surface of the first magnetic layer. The magnetic core is made of a ferrite material.

Abstract: In an embodiment, a common mode choke coil 10 includes a drum core 12, coil part 30, and terminal electrodes 40, 42, 44, 46. The drum core 12 has a shaft part 14 and flange parts 16, 22, and conductive wires 32, 34 are wound around the outer periphery face of the shaft part 14 in the same winding direction by the same number of windings, with leader parts 32A, 32B, 34A, 34B led from both ends thereof. The flange parts 16, 22 have side face grooves 18, 20, 24, 26 on their side faces 16C, 16D, 22C, 22D, inside which side face grooves the engagement parts 40A, 42A, 44A, 46A are provided and positioned across the center of the flange part 16 or 22 in the height direction, where the leader parts 32A, 32B, 34A, 34B are electrically connected to the terminal electrodes 40, 42, 44, 46.

Abstract: In a common mode choke coil having a magnetic core, a decrease in peak value of a common mode impedance in a vicinity of its resonance frequency is suppressed. A common mode choke coil includes a non-magnetic layer, a first magnetic layer formed on a top surface of the non-magnetic layer, a second magnetic layer formed on a bottom surface of the non-magnetic layer, a magnetic core provided between the first magnetic layer and the second magnetic layer so that its axis extends in a top-bottom direction, a first coil conductor embedded in the non-magnetic layer and wound around the magnetic core, a second coil conductor embedded in the non-magnetic layer and wound around the magnetic core, and a first magnetic gap provided between a top surface of the magnetic core and a bottom surface of the first magnetic layer. The magnetic core is made of a ferrite material.

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body where such coil component still meets the demand for electrical current amplification. The coil component is structured in such a way that a helical coil is covered with a magnetic body. The magnetic body is mainly constituted by magnetic alloy grains and contains substantially no glass component, and each of the magnetic alloy grains has an oxide film of the grain on its surface.

Abstract: In an embodiment, a common mode choke coil 10 includes a drum core 12, coil part 30, and terminal electrodes 40, 42, 44, 46. The drum core 12 has a shaft part 14 and flange parts 16, 22, and conductive wires 32, 34 are wound around the outer periphery face of the shaft part 14 in the same winding direction by the same number of windings, with leader parts 32A, 32B, 34A, 34B led from both ends thereof. The flange parts 16, 22 have side face grooves 18, 20, 24, 26 on their side faces 16C, 16D, 22C, 22D, inside which side face grooves the engagement parts 40A, 42A, 44A, 46A are provided and positioned across the center of the flange part 16 or 22 in the height direction, where the leader parts 32A, 32B, 34A, 34B are electrically connected to the terminal electrodes 40, 42, 44, 46.

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body where such coil component still meets the demand for electrical current amplification. The coil component is structured in such a way that a helical coil is covered with a magnetic body. The magnetic body is mainly constituted by magnetic alloy grains and contains substantially no glass component, and each of the magnetic alloy grains has an oxide film of the grain on its surface.

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body where such coil component still meets the demand for electrical current amplification. The coil component is structured in such a way that a helical coil is covered with a magnetic body. The magnetic body is mainly constituted by magnetic alloy grains and does not contain glass component, and each of the magnetic alloy grains has an oxide film of the grain on its surface.

Abstract: A common mode noise filter includes: a first magnetic body and a second magnetic body; a non-magnetic body sandwiched between the first magnetic body and second magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; wherein a first lead conductor that connects one end of the first coil conductor to a first external terminal is embedded in the non-magnetic body 13, while a second lead conductor that connects one end of the second coil conductor to a third external terminal is embedded in the non-magnetic body.

Abstract: A circuit constant analysis method for an equivalent circuit of an inductance element includes determining values of various elements constituting the equivalent circuit from measured values of select electrical characteristics of the actual inductance element. The equivalent circuit includes: a parallel circuit connecting in parallel an inductance Ls, a capacitance Cp, and a resistance Rp; a capacitance Cr connected in series to said resistance Rp; an inductance Lr connected in parallel to said resistance Rp; a resistance Rs connected in series to said parallel circuit; a plurality of closed circuits including a resistance Rmi and an inductance Lmi magnetically coupled with a coupling coefficient ki by a mutual inductance Mi to said inductance Ls; and a resistance Rc connected in series to said capacitance Cp.

Abstract: A common mode noise filter includes: a first magnetic body and a second magnetic body; a non-magnetic body sandwiched between the first magnetic body and second magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; wherein a first lead conductor that connects one end of the first coil conductor to a first external terminal is embedded in the non-magnetic body 13, while a second lead conductor that connects one end of the second coil conductor to a third external terminal is embedded in the non-magnetic body.

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body, which is still capable of meeting the demand for electrical current amplification. A coil component, comprising a magnetic body mainly constituted by magnetic alloy grains, and a coil formed on the magnetic body; wherein an oxide film of the magnetic alloy grains is present on the surface of each of the magnetic alloy grains, and based on grain size by volume standard, the magnetic alloy grains have a d50 in a range of 3.0 to 20.0 ?m, d10/d50 in a range of 0.1 to 0.7, and d90/d50 in a range of 1.4 to 5.0.

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body, which is still capable of meeting the demand for electrical current amplification. A coil component, comprising a magnetic body mainly constituted by magnetic alloy grains, and a coil formed on the magnetic body; wherein an oxide film of the magnetic alloy grains is present on the surface of each of the magnetic alloy grains, and based on grain size by volume standard, the magnetic alloy grains have a d50 in a range of 3.0 to 20.0 ?m, d10/d50 in a range of 0.1 to 0.7, and d90/d50 in a range of 1.4 to 5.0.

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body where such coil component still meets the demand for electrical current amplification. The coil component is structured in such a way that a helical coil is covered with a magnetic body. The magnetic body is mainly constituted by magnetic alloy grains and does not contain glass component, and each of the magnetic alloy grains has an oxide film of the grain on its surface.

Abstract: The present invention provides an equivalent circuit, circuit constant analysis method, circuit constant analysis program, circuit constant analysis device, and circuit simulator for an inductance element that are capable of good approximation of characteristics even in the band region greater than or equal to the resonance frequency.

Abstract: An equivalent circuit and an analysis method are provided for highly accurately indicating characteristic of an inductance element wherein ferrite material is used. An equivalent circuit is used, wherein a closed circuit with resistance Rm1 and Rm2, and inductance Lm1 and Lm2 magnetically connects to inductance Ls of LsCpRp parallel circuit at coupling coefficients k1 and k2. First, the values of circuit constants Ls, Rp, and Cp are determined by making use of the conditions at the resonance point. Next, changes of reactance component in the equivalent circuit for frequency are calculated, based on the determined values of circuit constants Ls, Rp, and Cp, and find the values of frequency fm1 and fm2 whereat reactance component should be decreased by comparing frequency changes of measured reactance component.

Abstract: In an electronic component including: a sintered body with an internal electrode embedded; and an external electrode formed on the outer surface of this sintered body that is connected to the above internal electrode, a porous external electrode having numbers of pores is formed in the sintered body and thereafter the resin is impregnated through the pores. Thereby the pores of the external electrode are impregnated with a substance of the same sort as that of the buffer material as well as the buffer material interposes between the sintered body and the internal electrode.

Abstract: When forming an inductance device comprising internal conductors (21a-21f) which forms a coil and a close looped internal conductor (21g) which surrounds the central shaft of the coil, a fixed frequency in a frequency band in which an inductive reactance occurs is set to a targeted frequency f, and values of a series resistance ingredient r and inductance L of the close looped internal conductor (21g) are set to a value in a range which is prescribed in (2&pgr;f/3.15≦r/L≦2&pgr;f/0.32). Accordingly, the effect of the close looped conductive member (21g) is obtained at an intended frequency, and a inductance device having a close looped conductive member (21g) unlimited its shape and size can be obtained.

Abstract: Delamination in the conventional chip-type electronic part may create voids thereinside, allowing an internal electrode therein to vibrate in presence of external impacts or large electromagnetic forces caused by a high frequency current flowing inside the electrode, in such a way that fatigue may accumulate in the internal electrode, which eventually will results in the internal electrode being electrically disconnected. To solve this problem, a chip-type electronic part of the present invention includes synthetic resins impregnated into the voids to secure the internal electrode, wherein external electrodes of the chip-type electronic part are made of a conductive synthetic resin or a porous conductive material formed by sintering a conductive paste.

Abstract: A multilayer type electronic part includes a laminated structure formed by stacking a plurality of first and second ceramic layers, the first ceramic layers being provided with internal electrode patterns on top thereof, the second ceramic layers having no internal electrode pattern and being located at a top and a bottom portions of the laminated structure, respectively, the internal electrode patterns being connected to each other to form a coil inside the laminated structure, a pair of external electrodes provided at two opposing sides of the laminated structure and connected to the coil. The multilayer type electronic part further includes one or more third ceramic layers, each of the third ceramic layers not including internal electrode pattern and being interposed between the first ceramic layers, and means for connecting the internal electrode patterns formed on the first ceramic layers to form the coil.

Abstract: An electronic component is provided wherein the winding center line (Y) of a coil 72 buried in a rectangular-parallelepiped-shaped chip 71 is set on a straight line joining the central points of a pair of square opposed end surfaces of the chip where terminal electrodes 73a and 73b are formed, wherein the coil 72 is arranged so that the winding locus of the coil 72 as seen in the direction of the winding center line is located line-symmetrically around each of any two crossing straight lines crossing the winding center line (Y) of the coil 72 perpendicularly, and wherein leadout conductors 74a and 74b each joining the end of the coil and the terminal electrode 73a and 73b are located at the respective ends of the chip on the winding center line of the coil 72. Thus, this electronic component includes the coil that prevents the inductance from being changed by the mounting orientation.