Abstract: A description is given of a gas-discharge lamp base (11) with a housing comprising an upper part (10) and a cover (40), a support (16) accommodated in the housing for receiving the components, with a transformer, with inductances connected in series with the lamp (1) and a capacitance connected in parallel with the lamp (1), the transformer comprising a bar transformer (23). This construction permits particularly efficient production, because the support can be constructed as a simple leadframe which permits automatic component fitting.

Abstract: A ferrite material having a high Q value and also having a small absolute value of ??ir in a wide temperature range between ?40° C. and 160° C. A ferrite material, which comprises, as main constituents, 45.5 to 48 mol % of Fe2O3, 5 to 10.5 mol % of CuO, 26 to 30 mol % of ZnO, and the balance substantially being NiO, and further comprises, as an additive, cobalt oxide within a range between 0.005 and 0.045 wt % in terms of CoO. The ferrite material of the present invention has properties such as each of the absolute value of ??ir?40˜20 and the absolute value of ??ir20˜160 of 3 ppm/° C. or less, and a Q value at 125 kHz of 170 or more.

Abstract: A coil component includes a coil 2 having a through-hole 1, a magnetic core encapsulating the coil, and a terminal 4. The magnetic core includes a top portion 11 disposed at an upper part of the coil, a bottom portion 12 disposed at a lower part of the coil, and a middle portion 13. An outer layer thickness of the middle portion (W1) is less than a diameter of the through-hole, while the top portion and the bottom portion are higher in density than the middle portion. The configuration of the present invention provides a small size coil component with less occurrence of magnetic saturation to prevent lowering of inductance even with thin top 11 and bottom portions 11, 12. The coil component further has improved reliability.

Abstract: A composite magnetic core formed of a high permeability material and a lower permeability, high saturation flux density material prevents core saturation without an air gap and reduces eddy current losses and loss of inductance. The composite core is configured such that the low permeability, high saturation material is located where the flux accumulates from the high permeability sections. The presence of magnetic material having a relatively high permeability keeps the flux confined within the core thereby preventing fringing flux from spilling out into the winding arrangement. This composite core configuration balances the requirements of preventing core saturation and minimizing eddy current losses without increasing either the height or width of the core or the number of windings.

Abstract: An out-of-plane micro-structure which can be used for on-chip integration of high-Q inductors and transformers places the magnetic field direction parallel to the substrate plane without requiring high aspect ratio processing. The photolithographically patterned coil structure includes an elastic member having an intrinsic stress profile. The intrinsic stress profile biases a free portion away from the substrate forming a loop winding. An anchor portion remains fixed to the substrate. The free portion end becomes a second anchor portion which may be connected to the substrate via soldering or plating. A series of individual coil structures can be joined via their anchor portions to form inductors and transformers.

Abstract: A dielectric layer is formed over a substrate comprising a semiconductor material. A magnetic layer is formed over the dielectric layer. The magnetic layer comprises an amorphous alloy comprising cobalt.

Abstract: A Mn—Zn based ferrite having a main component comprised of 51 to 54 mol % of an iron oxide in Fe2O3 conversion, 14 to 21 mol % of a zinc oxide in ZnO conversion and the rest of a manganese oxide, wherein a content (? [ppm]) of cobalt oxide in a CoO conversion with respect to 100 wt % of the main component satisfies a relation formula below. Relation formula: Y1???Y2??(1) Note that Y1 and Y2 are expressed by the formulas below and CoO>0 [ppm]. Y1=(?0.13·B2+1.5·B?15.6A+850)/(0.0003·B+0.0098)?233??(2) Y2=(?0.40·B2+4.6·B?46.7A+2546)/(0.0003·B+0.0098)+1074??(3) The A and B in the above Y1 and Y2 are A=Fe2O3 (mol %) and B=ZnO (mol %).

Abstract: A dust core consists essentially of ferromagnetic powder; and an insulating binder, in which the ferromagnetic powder is dispersed; wherein the insulating binder is a silicone resin comprising a trifunctional alkyl-phenyl silicone resin and optionally containing an inorganic insulator such as an inorganic oxide, carbide or nitride. Preferably the alkyl-phenyl silicone resin is a methyl-phenyl silicone resin and comprises about 20 to 70 mol % of trifunctional groups. The dust core can be produced by pressure-molding a ferromagnetic powder, a lubricant and a trifunctional alkyl-phenyl silicone resin binder and heat treating the molded core at a temperature in the range of about 300 to about 800 ° C. for a time period in the range of about 20 minutes to about 2 hours in a non-oxidizing atmosphere. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength.

Abstract: A common mode choke coil has a plurality of metallic conducting wires buried into a sintered magnetic material such that the metallic conducting wires are proximate to each other and an electrode mounted on a surface of the sintered magnetic material so as to be connected to each end portion of each of the metallic conducting wires. The metallic conducting wires are integrally coated with a non-magnetic and electrically insulating material at a predetermined distance between each of the metallic conducting wires to thereby form coated conducting wires. The coated conducting wires buried into the sintered magnetic material are thus obtained.

Abstract: A magnetic core has a toroidal configuration, formed by winding an iron-based amorphous metal ribbon. Thereafter the core is heat-treated to achieve a linear B-H characteristic. Advantageously, the linear B-H characteristic does not change with the level of magnetic fields applied and the frequency utilized. With such properties, the core is especially suited for use in a current transformer.

Abstract: In a method for fabricating a surface mountable chip inductor, a spiral coil pattern is formed on a surface of a cylindrical body fabricated by mixing ferrite or ceramic powder with thermoplastic organic binder, the cylindrical body is transformed into a square-shaped body by being inserted into a square-shaped mold and pressure being applied at a certain temperature. An electric characteristic lowering problem can be prevented by forming the coil on the cylindrical body, and transforming the cylindrical body into a square-shaped body to improve surface mounting.

Abstract: An inductor assembly includes a coil or coils of insulated conductor material defining an inside volume, an inner core of magnetic core material located within the inside volume, and an outer core of magnetic core material including structure overlying the coil and inner core and having opposite inner walls facing polar ends of the coil and core, such that at least two magnetic gaps exist between ends of the inner core and the opposite inner walls of the outer core. A method for making the assembly is also disclosed.

Abstract: The present invention provides a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment, and further provides an adhesive resin composition for a magnetic core, which is useful for efficiently producing the above-mentioned magnetic core without using any organic solvent and which per se is stable to heat and elapse of time. By forming a coating film having a certain thickness or more on an outer surface using a composition containing a resin of specific properties, there can be obtained a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment.

Abstract: This invention describes materials system and processing conditions for manufacturing magnetic circuit components such as induction coils and transformers that are non wire-wound, miniature in size and, have a low manufacturing cost.

Abstract: An inductor component according to the present invention includes a magnetic core including at least one magnetic gap having a gap length of about 50 to 10,000 ?m in a magnetic path, a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap, and a coil having at least one turn applied to the magnetic core. The aforementioned magnet for magnetic bias is a bonded magnet containing a resin and a magnet powder dispersed in the resin and having a resistivity of 1 ?·cm or more. The magnet powder includes a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300° C. or more, the maximum particle diameter of 150 ?m or less, and an average particle diameter of 2.0 to 50 ?m m and coated with inorganic glass, and the rare-earth magnet powder is selected from the group consisting of a Sm—Co magnet powder, Nd—Fe—B magnet powder, and Sm—Fe—N magnet powder.

Abstract: An Mn—Zn ferrite wherein 0 to 5000 ppm of a Co oxide in a Co3O4 conversion is contained in a basic component constituted by Fe2O3: 51.5 to 57.0 mol % and ZnO: 0 to 15 mol % (note that 0 is not included) wherein the rest is substantially constituted by MnO; and a value ? in a formula (1) below in said ferrite satisfies ??0.93. ?=((Fe2+?Mn3+?Co3+)×(4.29×A+1.91×B+2.19×C+2.01×D))/((A?B?C?D)×100)??formula (1). Note that in the formula (1), (Fe2+?Mn3+?Co3+): [wt %], A: Fe2O3 [mol %], B: MnO [mol %], C: ZnO [mol %] and D: CoO [mol %]. According to the present invention, a highly reliable Mn—Zn ferrite used as a magnetic core of a power supply transformer, etc. of a switching power supply, etc., having a small core loss in a wide temperature range, furthermore, exhibiting a little deterioration of core loss characteristics under a high temperature (in a high temperature storage test) and having excellent magnetic stability, a transformer magnetic core and a transformer can be provided.

Abstract: An oscillating inductor has a symmetrical double-E core, which has two geometrically identical core windows, a cuboid center limb and two cuboid outer limbs. The double-E core is designed such that a longitudinal cross sectional area of the center limb is greater than 90 mm2, with a longitudinal cross section being regarded as a cross section which would separate the double-E core into two single E-cores, and the cross section being at right angles to the longitudinal cross section such that the double-E can be identified in the cross section, with the double-E core being located in a component volume of less than 26.5 mm×26.5 mm×15 mm (width×depth×height).

Abstract: The present invention is characterized in that, in a powder magnetic core obtained by compaction of an iron-based magnetic powder covered with an insulation film, a saturation magnetization Ms is Ms?1.9 T in a 1.6 MA/m magnetic field; a specific resistance ? is ??1.5 ??m; a magnetic flux density B2k is B2k?1.1 T in a 2 kA/m magnetic field; and a magnetic flux density B10k is B10k?1.6 T in a 10 kA/m magnetic field. In accordance with the present invention, it has been possible to industrially carry out compacting iron-based magnetic powders under remarkably high compacting pressures. As a result, high-performance powder magnetic cores are obtained which have a high density, and which are good in terms of the specific resistance and magnetic permeability.

Abstract: An inductive device comprises a magnetic core including a portion of a plurality of wires, at least one electric winding extending around the magnetic core, each of the plurality of wires substantially encircling the at least one electric winding, and at least one biassing magnet disposed adjacent the plurality of wires to provide a bias magnet flux for offsetting a flux generated by a direct current component flowing in the winding.

Abstract: An electrical component in the form of an inductor or transformer is disclosed which includes one or more coils and a magnetic polymer material located near the coils or supporting the coils to provide an electromagnetic interaction therewith. The magnetic polymer material is preferably a cured magnetic epoxy which includes a mercaptan derivative having a ferromagnetic atom chemically bonded therein. The ferromagnetic atom can be either a transition metal or rare-earth atom.

Abstract: An out-of-plane micro-structure which can be used for on-chip integration of high-Q inductors and transformers places the magnetic field direction parallel to the substrate plane without requiring high aspect ratio processing. The photolithographically patterned coil structure includes an elastic member having an intrinsic stress profile. The intrinsic stress profile biases a free portion away from the substrate forming a loop winding. An anchor portion remains fixed to the substrate. The free portion end becomes a second anchor portion which may be connected to the substrate via soldering or plating. A series of individual coil structures can be joined via their anchor portions to form inductors and transformers.

Abstract: In order to provide an inductance part having excellent DC superposition characteristic and core-loss, a magnetically biasing magnet, which is disposed in a magnetic gap of a magnetic core, is a bond magnet comprising magnetic powder and plastic resin with the content of the resin being 20% or more on the base of volumetric ratio and which has a specific resistance of 0.1?•cm or more. The magnetic powder used is rare-earth magnetic powder having an intrinsic coercive force of 5 kOe or more, Curie point of 300° C. or more, and an average particle size of 2.0-50 ?m. A magnetically biasing magnet used in an inductance part that is treated by the reflow soldering method has a resin content of 30% or more and the magnetic powder used therein is Sm—Co magnetic powder having an intrinsic coercive force of 10 kOe or more, Curie point of 500° C. or more, and an average particle size of 2.5-50 ?m. A thin magnet having a thickness of 500 ?m or less can be realized for a small-sized inductance part.

Abstract: An inductor component is provided. The inductor component includes a core composed of a hollow core piece and a rod core piece, a bobbin, and bonded magnets. Regarding the hollow core piece and rod core piece, the rod core piece is arranged across the hollow core piece, and joining is performed between the bottom surfaces of both end portions of the rod core piece and the hollow core piece with bonded magnets therebetween.

Abstract: A silicon steel core for transformers or choke coils includes at least one silicon steel sheet core which has at least two sets of silicon steel sheets that have respectively a magnetic flux section of a different length such that when two sets of the silicon steel sheet cores are coupled, the magnetic flux sections form at least two gaps of different intervals. Thereby the silicone steel sheet sets of a smaller gap can provide adequate electric induction for the transformers or choke coils while the silicone steel sheet sets of a greater gap can reduce the saturated condition when the transformers or choke coils are in the high load condition.

Abstract: In an inductor comprising an open magnetic path formed by a soft magnetic material and a winding provided around the open magnetic path, the soft magnetic material has its relative complex dielectric constant varying according to a frequency. In the soft magnetic material, the imaginary part of the relative complex dielectric constant is greater than the real part thereof in a high-frequency band equal higher than the frequency of the electric signal flowing in the winding. Specifically, the soft magnetic material has a resistivity of 150 &OHgr;m, has a real part of the relative complex dielectric constant, ranging from 1,000 to 20,000 at 1 kHz and 50 or less at 1 MHz, and the imaginary part is greater than the real part at 1 MHz.

Abstract: A powder core is obtained by compaction-forming magnetic powder. The magnetic powder is an alloy comprising 1-10 wt % Si, 0.1-1.0 wt % O, and balance Fe. An insulator comprising SiO2 and MgO as main components is interposed between powder particles having a particle size of 150 &mgr;m or less.

Abstract: The present invention provides a composite magnetic body containing metallic magnetic powder and thermosetting resin and having a packing ratio of the metallic magnetic powder of 65 vol % to 90 vol % and an electrical resistivity of at least 104 &OHgr;·cm. When a coil is embedded in this composite magnetic body, a miniature magnetic element can be obtained that has a high inductance value and is excellent in DC bias characteristics.

Abstract: A method for producing an on-chip signal transforming device. The method includes providing a substrate, and laying a first conductive layer above the substrate, wherein the first conductive layer has a plurality of interleaved inductors. The method then includes laying a second conductive layer above the substrate, wherein the second conductive layer has at least one inductor.

Abstract: A Mn—Zn based ferrite having a main component comprised of 51 to 54 mol % of an iron oxide in Fe2O3 conversion, 14 to 21 mol % of a zinc oxide in ZnO conversion and the rest of a manganese oxide, wherein a content (&agr; [ppm]) of cobalt oxide in a CoO conversion with respect to 100 wt % of the main component satisfies a relation formula below.

Abstract: An inductor component according to the present invention includes a magnetic core including at least one magnetic gap having a gap length of about 50 to 10,000 &mgr;m in a magnetic path, a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap, and a coil having at least one turn applied to the magnetic core. The aforementioned magnet for magnetic bias is a bonded magnet containing a resin and a magnet powder dispersed in the resin and having a resistivity of 1 &OHgr;·cm or more. The magnet powder includes a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300° C. or more, the maximum particle diameter of 150 &mgr;m or less, and an average particle diameter of 2.

Abstract: Conventional single-piece molded-type inductors are made by pressure-molding magnetic particles of ferroalloy, and have a problem that their insulation resistance drops sharply when placed in a high-temperature environment. Complex magnetic powder is obtained by mixing ferrous crystalline alloy magnetic powder with ferrous amorphous alloy magnetic powder, a connecting agent of 1 wt % to 10 wt % of the mixed magnetic powder being additionally mixed therein, producing a complex magnetic material for use in electronic components. Furthermore, a core is pressure-molded from the complex magnetic material, and a coil is buried in the core to obtain a magnetic element, such as an inductor.

Abstract: An Mn—Zn ferrite wherein 0 to 5000 ppm of a Co oxide in a CO3O4 conversion is contained in a basic component constituted by Fe2O3: 51.5 to 57.0 mol % and ZnO: 0 to 15 mol % (note that 0 is not included) wherein the rest is substantially constituted by MnO; and a value &agr; in a formula (1) below in said ferrite satisfies &agr;≧0.93.

Abstract: A low-profile magnetic core capable of reducing the thickness of an inductor component is provided. The magnetic core includes at least one gap in a magnetic path, and a permanent magnet is inserted in the gap. The magnetic core has an alternating current magnetic permeability at 20 kHz of 45 or more in a magnetic field of 120 Oe under application of direct current, and has a core loss characteristic of 100 kW/m3 or less under the conditions of 20 kHz and the maximum magnetic flux density of 0.1 T. An inductor component is produced by applying at least one turn of coil to the aforementioned magnetic core.

Abstract: A magnetic sticking sheet comprising a non-magnetic base and a magnetic layer formed on the non-magnetic base by coating a magnetic coating material containing ferromagnetic particles and a binder, the magnetic layer having a thickness of 0.03 to 0.10 mm, oriented longitudinally to give a squareness ratio of 80 to 90%, and multipolar-magnetized longitudinally; the sheet having a total thickness of 0.08 to 0.25 mm and flexibility for rolling; the magnetic layer having a surface magnetic flux density of 35 to 100G; and the sheet having a magnetic sticking force, required for removing a magnetic sticking sheet fixed magnetically on a magnetic surface via the magnetic layer while keeping the magnetic surface and the sheet parallel, of 0.4 to 0.9 gf/cm2.

Abstract: After an air-core coil has been set inside a molding die, the molding die is filled with a magnetic powder which is coated with at least two types of resin layers. A pure iron powder having an average particle size of about 20 &mgr;m or less is desirable for the magnetic powder. A thermosetting resin is used for the inner resin layer and a thermoplastic resin is used for the outer resin layer of the resin layers of two kinds with which the surface of the magnetic powder is coated. Then, a substantially rectangular molded body in which the air-core coil is embedded is formed by molding the magnetic powder under a molding pressure of about 1 to about 10 tons/cm2. Next, a magnetic body is formed by heat-treatment of the molded body.

Abstract: A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 &mgr;m, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.

Abstract: A ferrite core, such as for transformers, has a middle bleb with an oval cross-section or flattened oval cross-section, whereby the longitudinal axis of the middle bleb is oriented parallel to the attachment plane of the transformer and the longest axis of the oval cross-section or flattened oval cross-section is oriented vertically to this attachment plane. The core is symmetrically structured with respect to a mirror plane, which contains the longitudinal axis of the ferrite core and which resides vertically to the attachment plane, and is particularly low in distortion.

Abstract: A circuit layout for a lumped element dual-balun (248) where the elements of the dual-balun (248) are patterned on a monolithic substrate (250) in a compact design. The dual-balun (248) includes four inductors (252, 254, 256, 258) and four capacitors (340, 342, 360, 388) electrically coupled together to provide two zero phase RF output signals and two 180° phase RF output signals. The inductors (252, 254, 256, 258) are symmetrically disposed in a rectangular area on the substrate (250). A first pair of the inductors (252, 254) is positioned at one end of the rectangular area, and a second pair of the inductors (256, 258) is positioned at an opposite end of the rectangular area. The capacitors (340, 342, 360, 388) are formed on the monolithic substrate (250) in a central circuit area (260) between the first pair (252, 254) and the second pair of inductors (256, 258).

Abstract: The present invention provides a composite magnetic body containing metallic magnetic powder and thermosetting resin and having a packing ratio of the metallic magnetic powder of 65 vol % to 90 vol % and an electrical resistivity of at least 104 &OHgr;·cm. When a coil is embedded in this composite magnetic body, a miniature magnetic element can be obtained that has a high inductance value and is excellent in DC bias characteristics.

Abstract: An inductor includes a bar-shaped ferrite core and a spiral coil. The spiral coil is formed by removing a portion of a conductive film formed at least around the peripheral surface of the ferrite core. The surface of the ferrite core is impregnated with an insulating glass before the conductive film is formed. The content of the glass is preferably about 0.1% to about 20% by weight of the ferrite core. The ferrite core is preferably an Ni—Zn-based ferrite core.

Abstract: A dust core consists essentially of ferromagnetic powder; and an insulating binder, in which the ferromagnetic powder is dispersed; wherein the insulating binder is a silicone resin comprising a trifunctional alkyl-phenyl silicone resin and optionally containing an inorganic insulator such as an inorganic oxide, carbide or nitride. Preferably the alkyl-phenyl silicone resin is a methyl-phenyl silicone resin and comprises about 20 to 70 mol % of trifunctional groups. The dust core can be produced by pressure-molding a ferromagnetic powder, a lubricant and a trifunctional alkyl-phenyl silicone resin binder and heat treating the molded core at a temperature in the range of about 300 to about 800 ° C. for a time period in the range of about 20 minutes to about 2 hours in a non-oxidizing atmosphere. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength.

Abstract: A magnetic sticking sheet comprising a non-magnetic base and a magnetic layer formed on the non-magnetic base by coating a magnetic coating material containing ferromagnetic particles and a binder, the magnetic layer having a thickness of 0.03 to 0.10 mm, oriented longitudinally to give a squareness ratio of 80 to 90%, and multipolar-magnetized longitudinally; the sheet having a total thickness of 0.08 to 0.25 mm and flexibility for rolling; the magnetic layer having a surface magnetic flux density of 35 to 100G; and the sheet having a magnetic sticking force, required for removing a magnetic sticking sheet fixed magnetically on a magnetic surface via the magnetic layer while keeping the magnetic surface and the sheet parallel, of 0.4 to 0.9 gf/cm2.

Abstract: A high performance bulk magnetic component includes a plurality of layers of crystalline, ferromagnetic metal strips adhesively bonded together to form a polyhedrally shaped part. When the component is excited at an excitation frequency “f” to a peak induction level Bmax, it exhibits a core-loss less than “L” wherein L is given by the formula L=0.0135 f (Bmax)1.9+0.000108 f1.6 (Bmax)1.92, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively. Performance characteristics of the high performance bulk magnetic component of the present invention are significantly better when compared to silicon-steel components operated over the same frequency range.

Abstract: A filter circuit is used to select frequency bands of digital and analog signals over communications channels in a DSL communications system. The filter circuit includes an inductor having a core that consists essentially of an Fe-base amorphous metal alloy. Advantageously, the filter circuit provides as good or better performance than a filter circuit using a Co-base core; but is much less expensive. As such, it provides a low cost, high efficiency solution to communications applications, such as DSL communications systems, and the like.

Abstract: Magnetic cores including coiled amorphous ferromagnetic alloy strips are addressed. The composition of the alloy essentially corresponds to the formula Coa(Fe1−xMnx)bNicXdSicBfCg, where X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge, and P; and a, b, c, d, e, f, and g are indicated in atom percent and meet the following conditions: 40≦a≦82; 3≦b≦10, 0≦c≦30; 0≦d≦5; 0≦e≦20; 7≦f≦26; 0≦g≦3; with 15≦d+e+f+g≦33 and 0≦x≦1.

Abstract: It is an object of the present invention to provide a magnetic sensor which is suitable to be manufactured in a large amount, has a high sensitivity, and is easy to handle. A first outer layer section A is formed by laminating a plurality of magnetic sheets one upon another. A coil section is formed by laminating a plurality of coil-patterned sheets one upon another. A second outer layer section is formed by laminating a plurality of magnetic sheets one upon another. Each of the sheets forming the coil section B has its central portion formed by an elliptical magnetic body and its surrounding portion formed by a non-magnetic body on which a coil pattern is formed by a film located on the non-magnetic body.

Abstract: A choke coil includes a magnetic bobbin, windings, and a magnetic connecting member. The bobbin has a winding member. End flange portions are provided at both ends of the winding member, and a center flange portion is provided at the approximate center thereof. The center flange portion preferably has a substantially rectangular shape and is slightly smaller than the end flange portions, and has inclined portions at two adjoining corners. The connecting member connects the outer peripheral portions of the end flange portions. A gap is formed between the connecting member and the outer peripheral surface of the center flange portion.

Abstract: An isolation transformer core having a coil and a core member made by injection molding a mixture containing 10 to 50±3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

Abstract: The presented invention concerns a coil formed by windings of a first electrical wire and windings of at least one more electrical wire whereby the wires are connected with each other at their respective ends. The starting points of the individual windings of the first electrical wire and of at least one more electrical wire are shifted against each other along the circumference of the coil body. Each wire forms a redirection point after approximately one loop at which it traverses under itself and then crosses over the neighboring wire windings along the axis of the coil until it is redirected to run parallel to the other wire layers around the coil body. Thus, the windings of different wires alternate in a predetermined manner along the coil axis.

Abstract: A microwave inductor including a coil with windings tapered from a first end of the coil to a second end of the coil to reduce resonant loss glitches found in conventional inductors which have uniform diameter windings. The coil further includes a core composed of a dielectric material containing a colloidal suspension of magnetic particles, the magnetic material preferably being iron powder and the dielectric preferably being epoxy, making the core a poly-iron material. The magnetic particles being colloidally suspended in dielectric increase the impedance of the coil at high frequencies to reduce resonant glitches without lowering the low frequency Q of the inductor. As such, a single coil can be utilized both in a filter which requires a low impedance at low frequencies to create a high Q, and as a bias line which operates at frequencies well beyond the resonant frequency of the inductor since a high impedance is provided by the core at higher resonant frequencies.