47results about How to "Increase inductance" patented technology

The invention relates to the technical field of microelectronics, and discloses a processing method of a passive chip for magnetic field energy collection, which comprises the following steps: S1, providing a chip with a flexible substrate, and depositing a first dielectric layer on the surface of the substrate to isolate the substrate from a coil; s2, forming a three-dimensional spiral coil structure on the dielectric layer by adopting a three-dimensional micro-nano processing technology, wherein the coils are stacked layer by layer in an asymmetric spiral form along a direction perpendicular to the substrate; and S3, in the forming process of the coil, a multi-wire-harness cross arrangement design is used, so that the inductance increment of a unit area is maximized. Through the design of the three-dimensional spiral coils and the asymmetric coils, the limitation of a traditional planar coil structure on magnetic field coupling and induction efficiency is broken through, the three-dimensional spiral coils are arranged in a multi-layer mode in the vertical direction, magnetic flux coupling between the coils is tighter, and the inductance value and the induced electromotive force are remarkably improved.

The invention discloses a U-shaped coil inductor and a production method thereof, and the method comprises the following steps: S1, cutting a copper sheet into a required size through a punching machine, and bending the copper sheet into a U-shaped coil; s2, the U-shaped coil is placed on a lower punching die with the opening facing downwards, and an electrode of the U-shaped coil is placed in a groove of the lower punching die; s3, feeding the alloy powder into a mold, and applying pressure to press the alloy powder and the U-shaped coil into an inductor; s4, putting the inductor into an oven for baking; s5, uniformly covering the inductor with an organic coating through spraying equipment to form a protective layer; and S6, stripping the protective layer of the exposed electrode of the inductor by using laser, and plating a tin layer on the electrode through electroplating. The U-shaped coil has the beneficial effects that the U-shaped coil is formed by bending the copper sheet, the structure is simple, automatic generation and processing are facilitated, and the production efficiency is improved; the U-shaped coil and the magnetic powder block are pressed and integrally formed, the volume is small, the magnetic powder block can be easily integrated into a circuit, the design of the circuit is more compact, and the requirement for high integration of components is met.

The invention discloses a loss characteristic negative temperature coefficient integrally-formed inductor and a preparation method thereof, and the method comprises the steps: preparing soft magnetic metal powder: carrying out passivation, coating, granulation and lubricant adding treatment on carbonyl iron powder and gas atomization iron nickel powder, and obtaining two kinds of soft magnetic metal powder; pressing the treated atomized iron-nickel powder to serve as a middle column of the integrally-formed inductor, and performing heat treatment; the middle column is bonded in the coil; and embedding the coil into the treated carbonyl iron powder, carrying out compression molding, and baking to obtain the iron core. The obtained integrally-formed inductor is high in inductance value, the loss of the integrally-formed inductor cannot be increased along with temperature rise, the conversion efficiency of the integrally-formed inductor at the temperature of 100 DEG C is higher than 25 DEG C, and the integrally-formed inductor has the advantages of being high in inductance and loss negative temperature coefficient.

The invention discloses a four-corner snakelike bridge broadband electromagnetic band gap structure, and belongs to the technical field of circuit microwaves. According to the structure, complementary split-ring resonator shape etching is carried out at the center, and the snake-shaped bridge structures are arranged between the adjacent units, so that the inductance between the electromagnetic band gap units is increased, low-frequency-band SSN is effectively suppressed, the bandwidth is relatively wide, and SSN of a stop band can be effectively suppressed. The four sides of the EBG structure are etched into rectangles, and adjacent elements are connected to form a bridge. Compared with a traditional L-bridge structure, the S-shaped structure is designed, so that the surface current path can be increased, and the equivalent inductance and the equivalent capacitance are increased. The gap between the resonant rings generates a gap current and generates a resonant circuit, so that the cut-off frequency can be effectively reduced and the width of a stop band can be improved. The ultra-wide band gap structure takes the suppression depth of-30dB as a standard, can reach an ultra-wide band gap of 23.8 GHz, is obviously superior to a conventional electromagnetic band gap structure, and can better suppress the noise of a synchronous switch.

The utility model discloses a series common mode inductor and a circuit system, the inductor comprises a base plate, a magnetic core, a winding and a magnetic column, the base plate is provided with a first surface and a second surface which are opposite to each other, and the base plate is provided with a plate hole penetrating through the first surface and the second surface; the magnetic core is located on the first surface of the bottom plate, and a winding is wound on the magnetic core; the winding comprises a plurality of series coil groups, each series coil group is formed by connecting input ends and output ends of a plurality of coils in series, so that each series coil group is provided with an input end and an output end, and each input end and each output end respectively penetrate out of the second surface to the first surface through the plate holes; the number of the plate holes is twice that of the series coil groups; the magnetic columns are located on the magnetic core and located between every two adjacent series coil sets. According to the utility model, the inductor volume can be saved, and the special electrical performance is stable.

The present invention relates to the technical field of inductors, and proposes an electroplating method for an integral co-fired inductor, comprising the following steps: step one, preparing a prefabricated top blank, a prefabricated winding, a prefabricated bottom blank and a prefabricated wire to make an inductor blank; step two, heating and pressurizing the inductor blank by a hot press; step three, after cooling and bonding, forming a circuit layer on the surface of the inductor blank by laser marking of a laser marking machine; step four, plating the inductor blank with a required electroplating layer by an electroplating process; step five, removing excess electroplating material on the electroplating layer of the inductor blank by a laser marking process of a laser marking machine. The electroplating method for an integral co-fired inductor proposed by the present invention not only simplifies the preparation process, but also reduces the size of the inductor, and the surface of the component is flat, so that the accuracy can be improved, the contact resistance of the power module components can be reduced, and the inductance and magnetic flux density of the product can be improved at the same time, thereby achieving the effect of reducing the loss.

The invention relates to a filter for a vehicle-mounted driving motor system, which comprises a common-mode magnetic ring group, a front noise filtering capacitor bank, a rear noise filtering capacitor bank, a high-voltage copper bar and a support, and is characterized in that the common-mode magnetic ring group is mounted in the support, and the front noise filtering capacitor bank and the rear noise filtering capacitor bank are mounted on one side of the support; the high-voltage copper bar passes through the common-mode magnetic ring group; the common-mode magnetic ring group comprises a primary magnetic core, a secondary magnetic core and a tertiary magnetic core; and the front noise filtering capacitor bank and the rear noise filtering capacitor bank respectively comprise an X capacitor, a Y capacitor and a damping resistor. Compared with the prior art, the system has the advantages that the topological structure has more expansibility, the magnetic cores of the common-mode magnetic ring group are selected according to the requirements of different driving motor systems on electromagnetic compatibility, and the application range is wide; the front noise filtering capacitor bank and the rear noise filtering capacitor bank are integrated into a two-in-one filter plate, so that the problem of ESL (Electronic Security Language) caused by overlong lead terminals is effectively solved; and a shielding cabin is formed by the filter through the shielding cover, so that a space coupling path is cut off, and the like.

This utility model relates to the field of electronic component technology, and in particular to a vertical dual-winding coupled inductor. The vertical dual-winding coupled inductor of this utility model adopts a dual-winding structure design. The first winding is wound on a magnetic core, and the second winding is wound on a bushing base. The magnetic core is then inserted into the bushing base, so that the first winding and the second winding are combined. The magnetic core of the first winding increases the inductance of the second winding. After assembly, the base and the outer shell are installed to separate the windings. The staggered second wire outlet holes and wire slots ensure that the lead ends of the two windings can maintain a certain distance, reducing the chance of contact and achieving effective isolation, which can effectively avoid the risk of short circuits and failures.

The invention relates to the technical field of electric reactors, and discloses a three-phase zero-sequence electric reactor which comprises side columns, a middle core column, a first yoke, a second yoke, a first winding, a second winding and a third winding. The two ends of the side column and the two ends of the middle core column are fixedly connected with the first yoke and the second yoke respectively. And the first winding, the second winding and the third winding are wound on the middle core column. According to the invention, the structure is simple, the structure is compact, the three-phase symmetry is perfect, the geometric positions are completely symmetrical, the experienced magnetic circuit conditions are completely consistent, and the problem of three-phase current and impedance imbalance caused by the asymmetry of the magnetic circuit is fundamentally eliminated. Besides, zero-sequence magnetic flux is bound in the middle core column and does not need to flow through a side column and a long yoke to form a lengthy path like a traditional structure, so that a magnetic circuit is remarkably short, magnetic resistance is extremely small, larger magnetic flux can be generated under the same number of turns, higher inductance can be obtained by using fewer copper wires, copper loss is reduced, efficiency is improved, and cost is reduced. The inductor has the advantages of high inductance value and high efficiency.

This utility model discloses an antenna structure, antenna device, and electronic device, including a main body and two feed sections respectively connected to the main body; the two feed sections are intertwined to increase the inductance of the antenna structure. The antenna structure is formed by the main body and the two feed sections, and the ends of the two feed sections furthest from the main body are intertwined to make the two feed sections closer together, thereby increasing the coupling degree of the antenna structure and thus improving the inductance of the antenna structure.

The embodiment of the utility model provides an inductor, a circuit board assembly and a household appliance. The inductor comprises a magnetic core, a single group of coils and two pins, wherein the magnetic core comprises a first magnetic column and two second magnetic columns. The two second magnetic columns are arranged at intervals in the first direction, the two ends of the first magnetic column are connected with the two second magnetic columns, the first magnetic column is in an arc shape, and the second magnetic columns extend along a straight line. The single coil is wound on the first magnetic column and the two second magnetic columns. And the two pins are connected to the two ends of the single group of coils. According to the inductor provided by the embodiment of the invention, the two linear second magnetic columns are arranged at the two ends of the arc-shaped first magnetic column, winding of the linear magnetic columns is denser and more uniform, and magnetic leakage is reduced while the inductance value is increased. When the inductor is installed on the circuit board and the extension direction of the second magnetic column is parallel to the thickness direction of the circuit board, the number of winding turns of a single coil is increased by increasing the extension size of the second magnetic column, and the occupied area of the inductor on the circuit board is not increased while the inductance value is increased.

The utility model relates to filter technical field, specifically disclose a compact multistage LC filter, the filter includes rectangle insulating substrate, its four corner position is equipped with mounting hole, the filter shell is fixedly installed above the insulating substrate, the both ends of filter shell are equipped with input and output port, in the filter shell, the insulating substrate top is equipped with at least two stages filter unit, and each stage filter unit contains spiral inductance and interdigital capacitance, and they are connected through microstrip line between the filter unit of adjacent stage alternately cascaded. Two insulating shield baffles are arranged between the adjacent filter units, which are connected with the insulating substrate and the filter shell, and the shielding layer formed between the insulating shield baffles is connected with the bottom ground plane through the metallized via on the insulating substrate. The filter realizes compact volume, excellent filtering performance and anti-interference ability through three-dimensional inductance, shielding structure and optimized layout.

The invention discloses an integrally formed small-size inductor and a preparation method thereof. The integrally formed small-size inductor comprises an I-shaped CORE, a flat copper wire is wound on the I-shaped CORE, a square CORE is arranged outside the I-shaped CORE, and the I-shaped CORE and the square CORE are integrally formed through hot pressing; the preparation method comprises the following steps: S1, preparing I-shaped CORE and square CORE; s2, winding wires on the I-shaped CORE, and bending the wound wires to form an electrode surface; s3, aligning and combining the I-shaped CORE and the square CORE; s4, carrying out hot pressing on the I-shaped CORE and the square CORE which are combined; and S5, curing and glue spraying are performed, and the electrode surface is subjected to paint stripping electroplating to form an electrode. The method has the advantages that the I-shaped CORE and the square CORE are subjected to thermocompression bonding to form the inductor, and the inductor has higher inductance value and more stable ISAT.

The invention provides an inductor, a circuit board integrated inductor, charging equipment and electronic equipment. The inductor comprises a magnetic core, the magnetic core is provided with a plurality of first through holes and a plurality of second through holes, the first through holes are sequentially arranged at intervals in the first direction, the second through holes are sequentially arranged at intervals in the first direction, and the first through holes and the second through holes are arranged at intervals in the second direction; when the thickness of the magnetic core is 0.3 mm to 0.5 mm, the range of collapse pressure F is larger than or equal to 200 N, and the first direction intersects with the second direction; the coil sequentially and alternately penetrates through the first through hole and the second through hole and is wound on the magnetic core, and the coil and the magnetic core are arranged in an insulated mode. According to the inductor provided by the embodiment of the invention, under the condition of a certain size, the proportion of the magnetic core can be increased, so that the inductor has relatively high inductance value and relatively high collapse pressure.

The invention relates to the technical field of inductance elements, in particular to an inductance element, a preparation method thereof and electronic equipment. The inductor element comprises an inductor body and a physical vapor deposition metal layer. The inductor body has an assembly surface. A physical vapor deposition metal layer is disposed on the assembly surface. Wherein a separation groove is arranged between two ends of the physical vapor deposition metal layer in the direction parallel to the assembly surface, the separation groove is configured to cut off the physical vapor deposition metal layer into two parts along the thickness direction of the physical vapor deposition metal layer, one part of the physical vapor deposition metal layer forms a first extraction electrode of the inductor body, and the other part of the physical vapor deposition metal layer forms a second extraction electrode of the inductor body. And the other part of the physical vapor deposition metal layer forms a second extraction electrode of the inductor body. According to the inductance element, the physical vapor deposition metal layer is used as the electrode, the physical vapor deposition metal layer has the advantage of being small in thickness, the volume ratio of the inductance body in the inductance element can be increased, and then the inductance value of the inductance element is improved.

The utility model discloses an NFC charging antenna and a charging device, the NFC charging antenna comprises a substrate, a first coil and a second coil, and the substrate is provided with a first side surface and a second side surface which are oppositely arranged; the first coil is arranged on the first side face, the second coil is arranged on the second side face, one end of the first coil is connected with one end of the second coil, and the other end of the first coil and the other end of the second coil are both connected with an antenna matching circuit. A part of the first coil and the second coil coincide to generate an overlapping area, and the current flow directions of the first coil and the second coil are consistent, so that magnetic flux generated by the current passing through the first coil is coupled with magnetic flux generated by the current passing through the second coil. According to the technical scheme of the utility model, the area of the wireless charging coil can be reduced, the communication quality and the charging efficiency of the antenna are improved, and the wireless charging performance is improved.

Provided are a power semiconductor module and a power conversion device that have an internal wiring structure that can reduce electrical vibration that occurs in internal wiring. This power semiconductor module comprises: an upper arm that has a first substrate upon which at least one power semiconductor chip including a first switching element is mounted, and a second substrate upon which at least one power semiconductor chip including a second switching element connected in parallel to the first switching element is mounted; and a lower arm that has a third substrate upon which at least one power semiconductor chip including a third switching element is mounted, and a fourth substrate upon which at least one power semiconductor chip including a fourth switching element connected in parallel to the third switching element is mounted. The power semiconductor module is characterized in that: the upper arm has first wiring that connects the first substrate and the second substrate and connects an emitter or source for the first switching element to an emitter or source for the second switching element; and the first wiring is disposed at a position further away from the lower arm in comparison to the end portion on the far side away from the lower arm of the power semiconductor chip positioned furthest from the lower arm from among the power semiconductor chips of the upper arm.

The invention relates to an EMC (Electro Magnetic Compatibility) device capable of improving inductance value, which comprises an upper cover plate, a P-pole flat winding assembly, an N-pole flat winding assembly, a magnetic body and a base, and is characterized in that the P-pole flat winding assembly, the N-pole flat winding assembly and the magnetic body are arranged on the base; the upper cover plate is connected with the base, an inner cavity used for containing the P-pole flat winding assembly, the N-pole flat winding assembly and the magnetic body is formed between the upper cover plate and the base, the P-pole flat winding assembly comprises a first multi-turn copper bar coil, a P-pole input terminal and a P-pole output terminal, the P-pole input terminal and the P-pole output terminal are arranged at the two ends of the first multi-turn copper bar coil respectively, and the N-pole flat winding assembly comprises a second multi-turn copper bar coil. The N-pole input terminal and the N-pole output terminal are arranged at the two ends of the second multi-turn copper bar coil respectively, and the magnetic body penetrates through the first multi-turn copper bar coil and the second multi-turn copper bar coil at the same time. Compared with the prior art, the filter has the advantages of improving the filtering effect, reducing the size and the like.

This invention discloses a method for preparing a high-density patch inductor blank, relating to the field of patch power inductors. In the prefabrication process, the patch inductor blank undergoes a first-stage pressing and a second-stage pressing. During the first-stage pressing, the current positions of the upper die head and the second lower die head are kept constant. The first lower die head is activated and controlled to press upwards at a first preset pressure. When the powder height on the periphery of the cavity is higher than a preset dimension of powder height at the center of the cavity, the second-stage pressing begins. During the second-stage pressing, the first lower die head continues to press at the first preset pressure, while the upper die head and the second lower die head are activated and controlled to press downwards and upwards respectively at a second preset pressure. When the powder height on the periphery of the cavity is equal to the powder height at the center of the cavity, the pressing pressure of the first lower die head is adjusted to the second preset pressure and held, resulting in a patch inductor blank. This method significantly improves the compaction density and permeability of the inductor blank.

The invention relates to the technical field of inductors, in particular to a magnetic conductivity gradient controllable laminated power inductor internal structure preparation process and a product thereof, the magnetic conductivity gradient controllable laminated power inductor internal structure preparation process comprises the following preparation steps: S1, a lamination process is adopted to prepare a plurality of FeSiCr prepregs by using FeSiCr slurry, the prepregs used for the first layer and the top layer are not punched, and the rest prepregs are punched; s2, NiZnCuFeO3 slurry is printed on the FeSiCr prepreg, a NiZnCuFeO3 circuit layer is formed, and the circuit layer needs to pass through the holes; s3, an inner electrode wire is printed on the surface of the NiZnCuFeO3 circuit layer, the edge of an inner electrode ring cannot exceed the edge of the NiZnCuFeO3 circuit layer, the inner electrode ring of the first-layer board prepreg does not need to penetrate through the hole, and the inner electrode wires of the other prepregs need to penetrate through the hole; and S4, after the inner electrode wire is printed on the first layer of prepreg, placing the second layer of prepreg, repeating the steps S2-S3, placing the third prepreg, repeating the steps S2-S3, and so on, and finally placing the top layer of prepreg to form a multi-layer structure and obtain the internal structure of the inductor.

This application provides an inductor, its fabrication method, and an electronic device. The inductor includes: a magnetic core with a hollow slot; a conductive busbar inserted within the hollow slot; an inner frame disposed within the hollow slot and distributed along the slot wall, the inner frame enclosing the conductive busbar; an outer frame enclosing the outer sides of the magnetic core; and a housing enclosing the outer sides of the outer frame, the two end faces of the magnetic core, and the two end faces of the inner frame, and fixing the conductive busbar thereto. The housing is integrally injection molded. Utilizing a rigid double-layer metal frame structure formed by the inner and outer frames, the magnetic core is sandwiched in the middle. During the integral injection molding process, the inner and outer frames protect the magnetic core, preventing it from cracking or degrading due to stress. This allows the magnetic core to be made of nanocrystalline materials with high saturation magnetic induction intensity and low loss, thereby achieving higher inductance and greater DC bias current capability within the same volume, exhibiting high power density and high current carrying capacity.

The utility model relates to the technical field of inductance elements, and provides an integrally formed inductor, which comprises a magnet structure and a conductor coil, the magnet structure comprises a third magnet and a prefabricated first magnet, the conductor coil is wound on the outer surface of the magnet structure, the third magnet is coated on the outer surfaces of the conductor coil and the magnet structure, and the first magnet and the second magnet are prefabricated. The conductor coil is not exposed, the conductor coil is of an integrally-formed cuboid structure, the first magnet is a middle column with the section of a rectangular structure, the conductor coil is a rectangular coil matched with the first magnet, the four corners of the rectangular section of the first magnet are provided with chamfers, and the chamfers R are larger than 2 mm. And the conductor coil is provided with a chamfer matched with the first magnet. By means of the technical scheme, the problems that an existing inductor adopts a non-integrally-formed circular middle column, a copper wire is exposed, the magnetic shielding effect is poor easily, magnetic lines of force can be diffused into the surrounding environment, and normal operation of surrounding components is interfered are solved.

In a semiconductor module (10), an O1 terminal (140) and an O2 terminal (210) are connected, and a first module (11) and a second module (12) are connected. The first module (11) and the second module (12) face each other in the thickness direction. The current path direction in the first module (11) is opposite to the current path direction in the second module (12). As a result, an increase in inductance can be suppressed in the semiconductor module.

The present invention discloses a rotor structure, a motor and an electrical appliance including the rotor structure, and relates to the technical field of motors. The rotor structure includes a rotor core, the rotor core is provided with a plurality of magnetic steel slots penetrating the rotor core in the axial direction, the plurality of magnetic steel slots are arranged in a ring shape, the end of the rotor core includes a first region corresponding to the magnetic steel slots and located outside the magnetic steel slots, a second region corresponding to the q-axis and located on the q-axis, and at least one of the first regions at the end of the rotor core is partially or entirely lower than the second region adjacent to the first region. With such an arrangement, while reducing the cost of magnetic steel, the magnetic resistance difference between the d-axis and the q-axis of the rotor structure is increased, thereby increasing the magnetic resistance torque, reducing the copper loss of the motor, and improving the efficiency of the motor.

The present invention provides a coil component that can obtain a higher inductance even if a magnetic core including a metal magnetic body is used. The coil component includes: a main core having a middle leg and an outer leg, wherein the middle leg is wound with a coil body, and the outer leg is connected to the middle leg via a base; and a sub-core arranged to face the base with the middle leg interposed therebetween. There is a gap of a predetermined width between the middle leg and the sub-core, and the width of the gap between the middle leg and the sub-core is greater than the width of the gap between the outer leg and the sub-core.

The invention belongs to the technical field of polarized antennas, and relates to a transmission-type linear polarization rotating surface, which comprises a polarization conversion array, and the polarization conversion array comprises a plurality of polarization conversion units. The polarization conversion unit comprises a dielectric layer, a first transmission layer and a second transmission layer; the first transmission layer comprises four first patches which are of an arc-shaped strip-shaped structure and are distributed at intervals; one end of the first patch is arranged on one diagonal line of the dielectric layer, and the other end of the first patch is arranged on the other diagonal line of the dielectric layer; the four first patches are distributed in a central symmetry manner, so that the first transmission layer forms a windmill-shaped structure; corresponding ends of the two opposite first patches are connected through a diode, and the diode is arranged on the diagonal line of the dielectric layer; the second transmission layer and the first transmission layer are connected, have the same structure and are mutually orthogonal; and the voltage of the diode is changed to realize rotation regulation and control of linear polarization. According to the invention, the linearly polarized incident waves can be regulated into linearly polarized waves with different inclination angles.

The present invention discloses a high-voltage grounding reactor for offshore wind power, comprising a mounting base and a supporting assembly arranged at the lower end thereof, a mounting cylinder being provided at the upper end of the mounting base, a reactor unit being sleeved on the mounting cylinder, the reactor unit comprising a first winding unit and a second winding unit, the leads of the first winding unit and the second winding unit being connected in series, a safety distance being provided between the second winding unit and the first winding unit, a rotating ring being rotatably provided at the upper end of the mounting cylinder, the present application is designed in view of the drawbacks of the existing devices, and can effectively utilize an unpowered wind ball to accelerate the discharge of heat inside the reactor, effectively improving the heat dissipation effect, and can also utilize high temperature to trigger the expansion of an expansion piece, thereby triggering a spray assembly, and utilizing liquid evaporation to achieve further cooling, effectively improving the heat dissipation effect, and also reducing the size of magnetic leakage, avoiding the burning of the coil caused by local wire overheating, and improving the safety and stability factor of the product.

The invention relates to a laminated inductor and a preparation method and application thereof. The laminated inductor comprises laminated magnetic powder cores, the layered magnetic powder core comprises a soft magnetic metal layer and an open annular copper conductor embedded in the soft magnetic metal layer; in every two adjacent layers of layered magnetic powder cores, openings of the open annular copper conductors are arranged in a staggered mode, and the second open end of one layered magnetic powder core is connected with the first open end of the other layered magnetic powder core. According to the laminated inductor and the preparation method thereof, the inductance value of the laminated inductor is increased, high inductance value (larger than or equal to 1000 mu H) can be achieved while large current (larger than or equal to 200 A) is coped with, the preparation method is simple, and automatic production is easy to achieve.

This invention discloses a design method for an ultra-thin 3D inductor passive device, comprising the following steps: S1, selecting a suitable substrate; S2, setting a bottom metal on the bottom of the substrate, metallizing a hole on the bottom metal, and extending the metallized hole through the substrate and above the upper surface of the substrate; S3, setting a trace metal on the metallized hole, and fixing the trace metal to the upper surface of the substrate; S4, setting bumps on the trace metal, and setting a top metal on the top of the bumps, forming a passive device with 3D inductance. This invention reduces the aspect ratio of the 3D inductor while ensuring inductance performance, lowers the processing difficulty, and reduces the thickness of the manufactured product and the overall thickness of the packaging module.

The invention provides a magnetic core and a coil device, which can realize the improvement of inductance or the miniaturization of a coil. A magnetic core according to one embodiment of the present invention has a plurality of leg sections and a pair of connecting sections that magnetically connect one end section and the other end section of the plurality of leg sections in the longitudinal direction, respectively, and a vertical gap, which is a magnetic gap perpendicular to the longitudinal direction, is formed in at least one of the plurality of leg sections and the pair of connecting sections. The leg parts include a pair of outer leg parts which magnetically connect one end part and the other end part in the length direction of the pair of connecting parts, a frame-shaped part is formed by the pair of outer leg parts and the pair of connecting parts, and at least one corner part of the frame-shaped part is provided with an inclined gap which is a magnetic gap for joining an inner corner and an outer corner.