Abstract: An inductor element 100 capable of functioning properly on a substrate includes two similarly shaped conductors such as spiral conductors 120, 122 formed on the surface of a semiconductor substrate 110. The upper conductor 120 and the lower conductor 122 have substantially the same shape, and the inner end of the conductor 120 is connected electrically with the outer end of the conductor 122. The outer and inner ends of the conductor 120 are connected with lead wires 130, 132, respectively, and the lead wire 132 connected to the inner end is led between the lower conductor 122 and the semiconductor substrate 110 to the periphery of the substrate.

Abstract: An inductor device includes first and second spiral conductors. First and second external connection terminals are formed in inner peripheral ends of the first and second spiral conductors, respectively. A third conductor connects an outer peripheral end of the first spiral conductor and that of the second spiral conductor to each other.

Abstract: A balun transformer includes a structure with three .lambda./4 strip lines for converting an unbalanced signal in an unbalanced transmission line into a balanced signal in a balanced transmission line. The balun transformer includes a first dielectric sheet on which a first strip line provided, a second dielectric sheet placed under the first dielectric sheet and on which a second strip line electro-magnetically coupled to the first strip line is provided, a third dielectric sheet placed under the second dielectric sheet and on which a ground pattern is provided, and a fourth dielectric sheet placed under the third dielectric sheet and on which a third strip line is provided. The balun transformer includes the reduced number of strip lines in comparison with the conventional laminated balun transformer, so that the production cost is reduced.

Abstract: An inductor device including a first coil conductor (310) and a second coil conductor (510), the first coil conductor (310) being located over a substrate (120) and having a first pattern and a first conductivity, and the second coil conductor (510) being located on a substantial portion of the first coil conductor (310), having a second pattern substantially conforming to the first pattern, and having a second conductivity substantially greater than the first conductivity.

Abstract: The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloys, and oxides. The inductor is compatible with integrated circuit manufacturing techniques and eliminates the need in many systems and circuits for large off chip inductors. A sense and measurement coil, which is fabricated on the same substrate as the inductor, provides the capability to measure the magnetic field or flux produced by the inductor. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.

Abstract: An inductor has a laminated structure in which an insulating layer and a wiring layer are laminated alternately on a semiconductor substrate. The laminated structure includes at least two wiring layers and an insulating layer interposed between them. A first wiring layer has a first winding part and a second winding part in the same plane, adjacent each other, and wound. A second wiring layer has a wiring part having a single path from one terminal to the other. The first and second winding parts are electrically connected to the wiring part. When a voltage is applied between one terminal of the first winding part and one terminal of the second winding part, currents flow in the first and second winding parts in opposite directions.

Abstract: A high-Q inductor for high frequency, having a plurality of inductor elements formed in a plurality of IC wiring layers with a connection formed therebetween. The directions of the magnetic fields generated by the respective inductor elements are substantially the same. With this construction, the section of the inductor is increased reducing the serial resistance component and an influence of a skin effect in a high-frequency range is eliminated increasing the Q value.

Abstract: An inductive device (10) having a magnetic core (16), which includes a portion of a plurality of wires (17), and at least one electric winding (18) extending around the magnetic core, wherein each of the plurality of wires substantially encircles the at least one electric winding, and wherein the plurality of wires include wires having different cross-sectional shapes to increase the density of the magnetic core.

Abstract: An electrical conductor winding (70) comprises a plurality of laminates of electrical insulation (72). Each laminate of electrical insulation (72) has a slot (78) on one surface (76). Each laminate of electrical insulation (70) has an electrical conductor (82) arranged in the slot (78). An electrical connector (84) connects the electrical conductor (82) in one laminate of electrical insulation (78) with the electrical conductor (82) in an adjacent laminate of electrical insulation (72). The laminates of electrical insulation (72) are arranged such that the surface (74) of one laminate of electrical insulation (72) abuts and is bonded to the surface (76) of an adjacent laminate of electrical insulation (12). The laminates of electrical insulation (12) comprise a glass-ceramic material. The electrical conductor windings allow active magnetic bearings, electric motors and electric generators to be used at temperatures up to 500° C. for example in gas turbine engines.

Abstract: Novel designs for printed circuit board transformers, and in particular for coreless printed circuit board transformers designed for operation in power transfer applications, in which shielding is provided by a combination of ferrite plates and thin conductive sheets.

Abstract: There are provided a coil-embedded dust core that provides high inductance and a method for manufacturing the same. The coil-embedded dust core includes a coil 1 formed by winding a flat conductor 2 and a green body 10 comprising of ferromagnetic metal powder coated with an insulating material. The coil 1 is composed of a winding section 3 in which the flat conductor 2 having front and back surfaces opposed to each other with a predetermined distance is wound and lead-out end sections 4a and 4b that are extended from the winding section 3. Either one of the front and back surfaces of the lead-out end section 4a and either one of the front and back surfaces of the lead-out end section 4b are formed so as to be on the same plane. By using the coil 1 in which the both end sections (lead-out end sections 4a and 4b) are formed on the same plane, the coil-embedded dust core can be made smaller in size, and high inductance can be provided.

Abstract: A transformer balun is obtained that is symmetrical in structure, provides high current, or high voltage, amplification and has high coupling coefficients while maintaining minimal overall size. The balun structure includes primary and secondary metal windings at separate layer interfaces. The primary and secondary metal windings are symmetrical and can have any number of turns, which is only limited by integrated circuit area and capacitance. Accordingly, the, primary and secondary windings may be on as many layers as needed. Further, the primary and/or secondary may include a center tap ground, which enables the winding to be used as a differential port.

Abstract: The invention relates to a planar coil circuit and provides an improved method for insulating a face of a planar circuit of the type typically used in a transformer, while leaving the terminals thereof exposed; and to a planar printed circuit or lead frame stamped or etched solid copper similar to printed circuits but with no base material core manufactured using this method.

Abstract: A transformer is provided with a coil portion containing primary windings and a secondary winding. Cores sandwich the coil portion. Each of these windings includes a toroidal-shaped portion that is formed by winding flat type wires in a toroidal shape and by overlapping these flat type wires. Edge portions of this flat type wire are derived from the toroidal-shaped portion respectively. A plurality of windings and the cores are arranged along an overlapping direction of the flat type wires. employed, By this structure, a copper loss caused by the skin effect can be reduced and the electromagnetic coupling conditions between the windings can be improved.

Abstract: This invention discloses a method for manufacturing an inductor by first press punching a first and a second layer of conductive plates into a first and second coil layers with a first and second inductor lead layers as single integrated layers. The manufacturing process further includes a step of overlapping and connecting the first and second coil layers to form an inductor. In a preferred embodiment, process of manufacturing further includes a step of mixing epoxy to bond with a highly magnetic material and pressure molding the bonding magnetic material around the coil layers to form an inductor.

Abstract: Electrically conductive layers 1a and 2a connected to each other via a contact form one inductor, while electrically conductive layers 1b and 2b connected to each other via other contact form the other inductor. Since the areas defined by the loops forming these two inductors are equal to each other, the inductances of the inductors are also equal to each other. Between both the inductors, the lengths in the loop of the portions (the conductive layers 1a and 1b) formed on a lower interlayer insulating film are equal to each other, while the lengths in the loop of the portions (the conductive layers 2a and 2b) formed on an upper interlayer insulating film are also equal to each other. This allows external disturbances such as parasitic capacitance to affect both the inductors equally. Accordingly, a voltage controlled oscillator incorporating the invention can stably provide undistorted sinusoidal oscillation signals.

Abstract: The magnetic component uses at least two different layers of magnetic material for carrying and amplifying the magnetic flux. The use of two different layers which may, however, have the same material composition allows the magnetic conductors to form a magnetic circuit with a locally matched domain alignment. The magnetic component accordingly allows considerable improvements to be achieved in the component parameter, in particular a considerable increase in the Q-factor.

Abstract: A transformer comprises a substrate comprising a semiconductor material, a first conductor over the substrate, a second conductor over the substrate, and a magnetic layer over the substrate. The first conductor defines a generally spiral-shaped signal path having at least one turn. The second conductor defines a generally spiral-shaped signal path having at least one turn.

Abstract: The present invention describes a planar transformer having a plurality of juxtaposed magnetic cores as well as a two-layer printed circuit board for spiralling a plurality of windings. Each arm of a plurality of juxtaposed magnetic cores respectively goes through a corresponding hole in the middle of these windings, to magnetically couple the current in the main winding to the other windings.

Abstract: An on-chip inductive structure, such as the load inductors of a push-pull amplifier, comprises a substrate and first and second inductors connected in series and formed on the substrate. The inductors spiral in opposite sense about a common center in substantially the same plane.

Abstract: In a coupling adjusting structure for a double-tuned circuit according to the present invention, first and second coils are configured such that a pair of first conductive patterns formed on a first surface of a printed circuit and a corresponding pair of second conductive patterns formed on a second surface of the printed circuit board are connected via corresponding connecting conductors, thereby making the first and second coils low and thin. Also, one end of the first coil and the corresponding end of the second coil are disposed close to each other, a first ground conductive pattern is disposed at least on the first surface of the printed circuit, and a first jumper connected to the first ground conductive pattern is disposed between the first and second coils so as to adjust an inductive coupling of the double-tuned circuit, thereby achieving a coupling adjusting structure for a double-tuned circuit whose inductive coupling is adjustable.

Abstract: A multilayered coil is formed by inserting insulating paper 13 having either a pressure sensitive adhesive or an adhesive disposed on both faces thereof into at least one place between thin coil layers and then magnetic cores 15 are mounted to the multilayered coil from above and below. Thus, a thin transformer for a switching power supply is provided, in which variation in distance between coil 11 and coil 12, of which one is disposed over the other, variation in distance of coil 11 and coil 12 from magnetic core 15 and the like are suppressed.

Abstract: An inductor comprises a substrate comprising a semiconductor material, a first dielectric layer over the substrate, a magnetic layer over the first dielectric layer, a second dielectric layer over the magnetic layer, and a conductor over the second dielectric layer.

Abstract: The present invention provides an electronic chip component (e.g., a chip inductor) small in size, and a manufacturing method thereof capable of shaping of the outer dimensions of the component into a desirable shape. The method involves press-fitting a chip inductor element into a component storage section of a mold plate comprised of a heat resistant rubber elastic member including the component storage section, while a resin coating material is coated on the element and dried to a dry-to-touch state, thereby hardening the resin coating material and automatically shaping the chip inductor element into a desired outer shape.

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 transformer comprises a substrate comprising a semiconductor material, a first conductor over the substrate, a second conductor over the substrate, and a magnetic layer over the substrate. The first conductor defines a generally spiral-shaped signal path having at least one turn. The second conductor defines a generally spiral-shaped signal path having at least one turn.

Abstract: An inductor is fabricated on a substrate having a top surface and a bottom surface. The inductor includes a plurality of holes extending through the substrate, wherein the plurality of holes interconnect the top surface and the bottom surface of the substrate. The inductor also includes a plurality of conductive posts formed in the plurality of holes and a plurality of conductive segments formed on the top surface and on the bottom surface that interconnect the conductive posts such that a continuous conductive coil is formed. The inductor also includes a magnetic core that occupies substantially the entire volume enclosed by the conductive coil.

Abstract: To present the ID tag including flat coil component, and characteristic adjusting method of ID tag capable of suppressing product fluctuations about the desired characteristic. The flat coil component of the ID tag of the invention comprises a flat coil composed of a conductive material provided continuously and spirally on an insulating substrate, and a jumper disposed on the flat coil with insulation, from one of inner end or outer end of this flat coil to the outside or inside of the flat coil where other end is positioned, in which the jumper is composed of a plurality of jumpers variable in the number of pieces in arrangement. The characteristic is adjusted by varying the number of effective pieces for forming the parallel arrangement.

Abstract: A high-voltage transformer includes a bobbin that holds a core at its center. This bobbin has eight winding grooves arrayed along the central axis of the core. A primary coil is wound around each of two outermost winding grooves with a predetermined number of turns. A secondary coil is wound around the six winding grooves near the center with a predetermined number of turns, which are distributed among these winding grooves. The cathode of a diode is connected through a terminal to one end of the secondary coil where the winding starts, while the anode of another diode is connected through another terminal to the other end of the secondary coil where winding ends.

Abstract: There is provided a coil and a method for fabricating the same. One embodiment of the coil includes a plurality of traces in one area of a substrate. Each trace has a first end located at a first side of the area, and a second end located at a second side of the area opposite the first side. A plurality of wires couples the plurality of traces to form a coil. Each wire couples the first end of one trace to the second end of another trace located adjacent to the one trace.

Abstract: A planar coil includes a winding of N turns (N is an integer greater than or equal to 2). Letting ri(n) be a radius of an inner circumference of a winding portion at the nth turn (n is an integer greater than or equal to 1 and less than or equal to N) from the inner side; ro(n) be a radius of an outer circumference of the same; rmin be a radius of an inner circumference of the innermost winding portion; Wtotal be a difference between a radius of an outer circumference of the outermost winding portion and the radius of the inner circumference of the innermost winding portion; and D be a distance between winding portions at adjacent turns, the ri(n) and ro(n) are determined so as to minimize a value of A expressed by equation (1) when the rmin, Wtotla and D are given.

Abstract: A multiple layer inductor has a first spiral conductive pattern disposed on a first surface; a second spiral conductive pattern disposed on a second surface; a continuing interconnection coupled to the first and second spiral conductive patterns; an interface coupled to the first and second spiral conductive patterns; and a conductive shield pattern disposed on a third surface that is adjacent to the second surface. The interface includes a first terminal disposed on the first surface that is coupled to the first spiral conductive pattern. The interface also includes a second terminal that is disposed on the first surface and coupled to said second spiral conductive pattern.

Abstract: The manufacturing method for components of the inductive type, in particular inductance coils, transformers or antennae, consists in making by micro-machining simultaneously on a first substrate made of magnetic material a plurality of first parts (1) connected to each other by connecting elements (2) or a connecting support, inserting on the arms (8a, 8b, 8c) of these first parts (1) a printed multi-layered plate (4, 5) having openings for the arms and metal windings ending in at least two contact pads (7a, 7b), in placing and securing a second substrate made of magnetic material on the first substrate and the plate, said second substrate having undergone micro-machining to obtain second parts (13) complementary to the first parts. These second parts are connected to each other by connecting elements or a connecting support.

Abstract: In the multilayer inductor, the substrate thereof is composed of a constituent belonging to spinel ferrite, and is furnished with internal conductors of a main constituent being silver at the interior of the substrate. The internal conductors are drawn outside of the substrate, and the drawn portions are provided with external electrodes. The internal conductors contain manganese and bismuth, and the manganese and bismuth contents at an interface between the internal conductors and the substrate are more than those of other ranges. MnO2 of 0.02 to 0.1 wt % and Bi2O3 of 0.5 to 1.2 wt % are added to a paste of the main constituent being silver to be used to the internal conductors, and the paste is baked together with spinel ferrite material.

Abstract: An inductor assembly for use in RF and microwave circuits wherein the inductor is formed of a first spiral wound metal strip that is mounted on a flat surface of a quartz substrate. A metal strip is formed of copper and has a height above the flat surface that is about 30 microns.

Abstract: A micro-electro mechanical (MEM) switch capable of inductively coupling and decoupling electrical signals is described. The inductive MEM switch consists of a first plurality of coils on a movable platform and a second plurality of coils on a stationary platform or substrate, the coils on the movable platform being above or below those in the stationary substrate. Coupling and decoupling occurs by rotating or by laterally displacing the coils of the movable platform with respect to the coils on the stationary substrate. Diverse arrangements of coils respectively on the movable and stationary substrates allow for a multi-pole and multi-position switching configurations. The MEM switches described eliminate problems of stiction, arcing and welding of the switch contacts. The MEMS switches of the invention can be fabricated using standard CMOS techniques.

Abstract: A method and apparatus to layout planar magnetic coils on a PCB consists of maximizing the layer to layer overlap, and consequently maximizing total inductance for the given layout area, by spiraling alternating layers inward and outward. A further benefit of the matching opposite spirals is the ability to make the layer to layer electrical contacts within the magnetic field area, thus reducing leakage inductance, and minimizing the wasted extra conductor line length needed to make the connections outside the magnetic field. The reduced conductor line length results in reduced conductor line resistance. The method is applicable to voltage transformers and isolation transformers as well as simple inductors and other magnetic devices. In the transformer case the odd numbered layers are typically connected together in series to provide a larger turn ratio, and the even numbered layers are typically single turns (i.e., no spiral) connected together in parallel to provide more current capability.

Abstract: A surface mounting type planar magnetic device comprised of upper ferrite magnetic film, lower ferrite magnetic film and a planar coil interposed therebetween. For applying surface mount technology, an opening is formed in the upper ferrite magnetic film above a coil terminal portion and then, an external electrode conductive with the coil terminal portion through the opening is formed on the upper ferrite magnetic film. Further, this surface mounting type planar magnetic device is of a thin structure and can be mounted on the surface of a printed board. Its power loss is small, its inductance is large, its frequency characteristic is excellent, the disparity of the characteristic is small and its reliability is excellent.

Abstract: An isolation transformer arrangement has an isolation transformer having magnetically coupled primary and secondary windings, one of which is formed of at least one planar conductive run formed on an associated face of an insulating substrate of a printed circuit board and the other is formed of a number of turns of an insulated wire conductor. The printed circuit board also has one or more discreet electric components arranged in two electrically separate circuits each circuit connectable to a respective one of the primary and the secondary windings of the isolation transformer. The insulation of the wire conductor winding provides a desired level of electrical isolation between the circuits necessary for use in medical equipment.

Abstract: A composite component including a helical strip and a plurality of terminals both made of a same conductor material, the helical strip formed in close contact with an external periphery of at least one capacitor constructed of at least one insulation layer and at least two electrode layers, wherein the helical axis of the helical conductor strip is parallel with the electrode layers composing the capacitor.

Abstract: A system (10) comprising a planar transformer winding (16) also comprises an electromagnetic interference (EMI) suppressor arrangement (24) for suppressing common mode EMI generated by the transformer winding. The suppressor arrangement comprises a planar winding (28) which, in use, is energized in anti-phase relative to the system winding. The arrangement being such that the winding arrangement (24) is exposed to the system winding via a dielectric medium, thereby to provide capacitive coupling between the suppressor winding arrangement and the system, to suppress EMI generated by the system winding.

Abstract: The present invention relates to inductors with improved inductance and quality factor. In one embodiment, a magnetic thin film inductor is disclosed. In this embodiment, magnetic thin film inductor includes a plurality of elongated conducting regions and magnetic material. The plurality of elongated conducting regions are positioned parallel with each other and at a predetermined spaced distance apart from each other. The magnetic material encases the plurality of conducting regions, wherein when currents are applied to the conductors, current paths in each of the conductors cause the currents to generally flow in the same direction thereby enhancing mutual inductance.

Abstract: A current transformer, includes, a Rogowski coil for detecting an alternating current of a main circuit, and outputting a measure of the alternating current as an analog-voltage signal, includes, a printed circuit board, a sensor unit and an optic transmission path.

Abstract: The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloys, and oxides. The inductor is compatible with integrated circuit manufacturing techniques and eliminates the need in many systems and circuits for large off chip inductors. A sense and measurement coil, which is fabricated on the same substrate as the inductor, provides the capability to measure the magnetic field or flux produced by the inductor. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.

Abstract: An inductive element (10) of an integrated circuit, comprising at least one turn (12), which is formed by an integrated elongated track (14) made of a conductive material, wherein the interior margin of the conductive track (14) comprises at least one recess (30). The invention makes it possible in particular to increase the inductivity of the element (10) in a given available space on the substrate of an integrated circuit.

Abstract: A high Q on-chip inductor includes a primary winding and an auxiliary winding that is coupled to receive a proportionally opposite representation of an input of the primary winding. Further, the auxiliary winding has an admittance that is greater than the admittance of the primary winding thereby yielding an asymmetry in the admittances. As such, a push/pull mechanism is obtained in a 2-port system (e.g., 1st and 2nd nodes of the primary winding) that produces a large Q factor for an on-chip inductor.

Abstract: An integrated bobbin transformer assembly includes a first planar assembly, a second planar assembly, and a connecting assembly. The first planar assembly includes a first winding. In one embodiment of the invention, the second planar assembly includes an additional first winding. The connecting assembly is integrated into the first planar assembly and the second planar assembly. The connecting assembly includes a second winding. A magnetic core magnetically couples a voltage from the second winding to the first winding. In an embodiment of the invention, the magnetic core magnetically couples a voltage from the second winding to the first winding and the additional first winding.

Abstract: A high Q inductive clement with low losses, high inductance and high efficiency is disclosed. The high Q inductive element with one or more inductive loops is formed over a silicon micro structure with thin support elements formed by deep plasma etching in bulk silicon. The support elements, which may have different configurations, such as walls or columns, provide mechanical stability to the inductive loops and reduce the parasitic capacitance and the losses to the substrate.

Abstract: The present invention provides a spin valve magnetic detecting element having large &Dgr;R. The positive or negative sign of the &bgr; value of a magnetic material constituting each of a first free magnetic sub-layer, a second free magnetic sub-layer and a pinned magnetic layer is defined so that the resistance values for spin-up conduction electrons are smaller than the resistance values for spin-down conduction electrons in all magnetic layers when magnetization of a free magnetic layer is changed to minimize the resistance value. In this case, the change &Dgr;R in resistance of the magnetic detecting element can be increased.

Abstract: An integrated circuit having an inducting device with a symmetric inductor. The inducting device comprises a first and second inductor. The first inductor is formed in a first conductive layer and is approximately symmetric about a plane of symmetry. The second inductor is formed in a second conductive layer that is at a select vertical distance from the first conductive layer. The second inductor is further approximately laterally aligned with the first inductor.