JP6492998B2 - Inductor component and manufacturing method thereof - Google Patents

Description

  The present invention relates to an inductor component including an inductor electrode provided inside a resin layer and a method for manufacturing the inductor component.

  For example, an inductor component 100 as shown in FIG. 10 is known as a component mounted on a mother board of an electronic device such as a mobile phone (see Patent Document 1). In this case, an annular coil core 101, a resin layer 102 in which the coil core 101 is embedded, and an inductor electrode 103 formed by spirally winding the periphery of the coil core 101 are provided. The resin layer 102 includes a first resin layer 102a on which the coil core 101 is disposed, a second resin layer 102b laminated on the upper surface of the first resin layer 102a, and a third resin laminated on the lower surface of the first resin layer 102a. And the resin layer 102c.

  The inductor electrode 103 includes a plurality of metal pins 103a and 103b erected in the first resin layer 102a and a plurality of upper wirings formed on the main surface of the second resin layer 102b opposite to the first resin layer 102a. An electrode 103c and a plurality of lower wiring electrodes 103d formed on the main surface of the third resin layer 102c opposite to the first resin layer 102a are provided. Each of the metal pins 103a and 103b includes a plurality of inner metal pins 103a disposed on the inner peripheral side of the coil core 101 and a plurality of outer metal pins 103b disposed on the outer peripheral side. Each upper wiring electrode 103c connects the upper end surfaces of the predetermined inner metal pin 103a and the outer metal pin 103b via via conductors 104a, and each lower wiring electrode 103c is connected to the predetermined inner metal pin 103a and the outer metal pin 103b. The lower end surfaces of the pins 103b are connected via via conductors 104b. With such a configuration, the inductor electrode 103 formed by spirally winding around the coil core 101 is formed.

JP 2014-38884 A (refer to paragraphs 0031 to 0039, FIG. 2, etc.)

  The metal pins 103a and 103b forming the above-described inductor electrode 103 are formed by shearing a wire made of a metal such as Cu. Each of the upper and lower wiring electrodes 103c and 103d is formed of a conductive paste containing a metal such as Cu. Each metal pin 103a, 103b is formed of substantially metal, whereas each upper and lower wiring electrode 103c, 103d is a mixture of an organic solvent and a metal filler, so each upper, lower wiring electrode 103c. , 103d has a higher specific resistance than the respective metal pins 103a, 103b. Since characteristics such as the Q value of the inductor electrode 103 become worse when the resistance value is high, a technique for reducing the resistance of the entire inductor electrode 103 is required.

  The present invention has been made in view of the above-described problems. It is an object of the present invention to provide an inductor component having better inductor characteristics than the conventional one and to provide a manufacturing method capable of manufacturing the inductor component at a low cost. .

  In order to achieve the above-described object, an inductor component of the present invention includes a first resin layer having a main surface and a side surface in a direction depending from the periphery of the main surface, the main surface of the first resin layer, and An inductor electrode in which bent first and second metal pins are arranged along the side surface, the main surface and the side surface of the first resin layer, and a second resin layer covering the inductor electrode Each of the first and second metal pins has a first portion along the main surface of the first resin layer, and a second portion continuous with the first portion and along the side surface. And the edge part of the said 2nd part of each said 1st, 2nd metal pin is exposed to the back surface facing the said main surface among said 1st resin layers, It is characterized by the above-mentioned.

  In this case, by bending the first and second metal pins, not only the portion along the side surface of the first resin layer of the inductor electrode (second portion) but also the portion along the main surface (first portion). It can be composed of a metal pin having a small specific resistance. If comprised in this way, compared with the case where the whole part along the main surface of the 1st resin layer of an inductor electrode is formed with an electrically conductive paste, the resistance value of an inductor electrode can be lowered | hung. Moreover, the characteristic (for example, Q value) of inductor components can be improved because the resistance value of an inductor electrode falls.

  Further, since the ratio of the metal pins forming the inductor electrode is increased as compared with the conventional case, it is not necessary to increase the line width of the wiring electrode on the main surface of the first resin layer in order to obtain a desired resistance value of the inductor electrode. Therefore, the inductor electrode can be easily downsized, and in turn, the inductor component can be easily downsized. Further, since the end portions of the second portions of the first and second metal pins are exposed on the back surface of the first resin layer, the both end portions can be used as external connection portions of the inductor electrode.

  The inductor electrode may be directly connected to an end portion of the first portion of the first metal pin and an end portion of the first portion of the second metal pin. In this case, since the whole inductor electrode can be formed of a metal pin, the resistance of the inductor electrode can be further reduced. In addition, since the inductor electrode can be formed of only metal pins, the DC resistance of the inductor electrode can be stabilized.

  The inductor electrode is a wiring in which an end portion of the first portion of the first metal pin and an end portion of the first portion of the second metal pin are formed on the main surface of the first resin layer. It may be connected via an electrode. In this case, the connection between the first metal pin and the second metal pin is facilitated.

  The first resin layer may be formed of a magnetic substance-containing resin containing a magnetic filler. In this case, the inductance value of the inductor component can be increased.

  The second resin layer is formed of a magnetic substance-containing resin containing a magnetic filler, and the weight ratio of the magnetic filler of the second resin layer is the weight of the magnetic filler of the first resin layer. It may be higher than the ratio. In this case, the inductance value of the inductor component can be further increased. Also, the magnetic filler is often made of a magnetic metal. In this case, since the metal component in the second resin layer is larger than the metal component in the first resin layer, the heat dissipation characteristics when the heat generated during energization of the inductor electrode is radiated from the second resin layer are improved. be able to.

  Moreover, the edge part of the said 2nd part of each said metal pin may comprise the edge part of the said inductor electrode. If it does in this way, the edge part of an inductor electrode can be exposed from the back surface of a 1st resin layer.

  In addition, the method for manufacturing an inductor component of the present invention includes a first resin layer having a main surface and a side surface in a direction depending from the periphery of the main surface, and the main surface and the side surface of the first resin layer. In a method for manufacturing an inductor component including an inductor electrode provided in a manner described above, a bending jig in which a recess having a bottom wall and an inner wall disposed in a direction perpendicular to the periphery of the bottom wall is formed is prepared A first step of forming the inductor electrode by pressing the metal pins and bending the two metal pins along the inner wall and the bottom wall of the recess. A metal pin bending step for forming a second metal pin, and a first resin layer is formed by filling the recess with resin in a state where the first and second metal pins are bent in the recess. 1 resin layer forming step The inductor forming step of forming the inductor electrode along the main surface and the side surface of the first resin layer, the inductor electrode formed by the inductor forming step, and the bending jig are separated. And a second resin layer forming step of forming a second resin layer covering the main surface and the side surface of the first resin layer and the inductor electrode.

  In this case, the inductor electrode disposed along the main surface and the side surface of the first resin layer can be easily formed. In addition, since each of the first and second metal pins of the inductor electrode is bent along the main surface as well as the side surface of the first resin layer, the portion on the main surface of the first resin layer of the inductor electrode is electrically conductive. In comparison with the case of forming with a conductive paste, an inductor electrode having a low resistance value can be formed.

  In the metal pin bending step, the first and second metal pins are bent so that the first and second metal pins overlap each other along the bottom wall of the bending jig, and the first and second metal pins are pressed by the overlapping portions. May be connected directly. In this way, it is possible to easily form an inductor electrode having a low resistance value that is formed entirely of metal pins.

  Further, in the metal pin bending step, the first and second metal pins are bent so that the first and second metal pins do not overlap in the concave portion of the bending jig, and the first resin layer forming step. Thereafter, the inductor electrode may be formed by forming wiring electrodes for connecting the first and second metal pins on the main surface of the first resin layer. In this case, an inductor electrode in which the portion along the main surface of the first resin layer is configured by the wiring electrode and the metal pin can be easily formed.

  According to the present invention, by bending the first and second metal pins, not only the portion along the side surface of the first resin layer of the inductor electrode (second portion) but also the portion along the main surface (first portion). The portion) can also be composed of a metal pin with a small specific resistance. If it does in this way, compared with the case where all the parts along the main surface of the 1st resin layer of an inductor electrode are formed with an electrically conductive paste, the resistance value of an inductor electrode can be lowered | hung. Moreover, the characteristic (for example, Q value) of inductor components can be improved because the resistance value of an inductor electrode falls.

It is a perspective view of the inductor component concerning 1st Embodiment of this invention. It is a figure for demonstrating a bending jig | tool. It is a figure which shows the manufacturing method of the inductor components of FIG. It is a figure which shows the manufacturing method of the inductor components of FIG. 1, Comprising: It is a figure which shows each process following FIG. It is a figure which shows the manufacturing method of the inductor components of FIG. 1, Comprising: It is a figure which shows each process following FIG. It is sectional drawing of the bending jig | tool which shows the state by which the metal pin was bent. It is a perspective view of the inductor component concerning 2nd Embodiment of this invention. It is a figure which shows the manufacturing method of the inductor components of FIG. FIG. 8 is a diagram illustrating a method for manufacturing the inductor component of FIG. 7, and is a diagram illustrating each process subsequent to FIG. 7. It is sectional drawing of the conventional inductor components.

<First Embodiment>
An inductor component 1a according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view of the inductor component 1a.

  As shown in FIG. 1, an inductor component 1a according to this embodiment includes a first resin layer 2, an inductor electrode 3 formed along the first resin layer 2, a first resin layer 2, and an inductor electrode. 2 and a second resin layer 4 provided so as to cover the substrate 3 and is mounted on, for example, a mother board of an electronic device.

  The first resin layer 2 is formed of, for example, a magnetic powder-containing resin in which a magnetic metal powder (corresponding to the “magnetic filler” of the present invention) is mixed with an epoxy resin. In this embodiment, the first resin layer 2 has a rectangular upper surface 2a (corresponding to the “main surface of the first resin layer” of the present invention), a side surface 2c in a direction depending from the periphery of the upper surface 2a, and a rectangular shape. It is formed of a rectangular parallelepiped having a lower surface 2b. The first resin layer 2 may be configured not to contain magnetic powder. Moreover, the shape of the 1st resin layer 2 is not restricted to a rectangular parallelepiped, It can change suitably, such as a cube.

  The inductor electrode 3 is formed of two metal pins 3a and 3b (corresponding to “first metal pin” and “second metal pin” of the present invention). In this case, both of the metal pins 3a and 3b are principal surface side portions 3a1 and 3b1 (corresponding to the “first portion” of the present invention) along the upper surface 2a of the first resin layer 2, and the main surface side portion 3a1. , 3b1 and side surface portions 3a2, 3b2 bent substantially 90 degrees with respect to main surface side portions 3a1, 3b1 so as to follow side surface 2c of first resin layer 2 (in the “second portion” of the present invention). Equivalent).

  Further, both metal pins 3a and 3b are arranged so that both main surface side portions 3a1 and 3b1 intersect (for example, ends of both main surface side portions 3a1 and 3b1 intersect). 3a and 3b are directly connected. Further, both end portions of the inductor electrode 3 are formed by the end portions of the side surface portions 3a2 and 3b2 of the respective metal pins 3a and 3b. Both metal pins 3a and 3b are formed to have desired lengths by, for example, shearing a wire made of Cu, Au, Ag, Al, a Cu-based alloy, or the like. Moreover, in this embodiment, both main surface side part 3a1, 3b1 is provided so that it may orthogonally cross, and has comprised the substantially L shape by the top view.

  The second resin layer 4 covers the upper surface 2 a and the side surface 2 c of the first resin layer 2 and the inductor electrode 3. Similar to the first resin layer 2, the second resin layer 4 is formed of, for example, a magnetic powder-containing resin in which a magnetic metal powder (corresponding to the “magnetic filler” of the present invention) is mixed with an epoxy resin. The Further, both end portions of the inductor electrode 3 are exposed from the lower surface 2b of the first resin layer 2 (corresponding to the “back surface of the first resin layer” of the present invention), and the both ends are connected to the outside of the inductor electrode 3. It is comprised so that it may function as a connection part. The second resin layer 4 may be configured not to contain magnetic powder.

(Manufacturing method of inductor component 1a)
Next, a method for manufacturing the inductor component 1a will be described with reference to FIGS. 2 is a diagram for explaining the bending jig, FIGS. 3 to 5 are diagrams showing a method of manufacturing the inductor component 1a, showing each step thereof, and FIG. 6 showing the metal pins 3a and 3b. It is sectional drawing of the bending jig | tool of the state bent. 2A is a perspective view of the bending jig, and FIG. 2B is a cross-sectional view taken along the line AA in FIG. 2A. In this embodiment, a case where four inductor components 1a are manufactured at once will be described as an example.

  First, a bending jig 5 as shown in FIG. 2 is created (preparation step). The bending jig 5 includes, for example, a plate-like member 6 in which a rectangular through hole 6a is formed at a substantially center in a top view, and a bottom member 7 provided so as to close the bottom of the through hole 6. The through hole 6a and the bottom member 7 form a recess 5a for bending the metal pins 3a and 3b. A plurality of grooves 6b, 6c for positioning the metal pins 3a, 3b are formed on the upper surface of the plate-like member 6. The bottom member 7 may not be provided. In this case, it is good to form the recessed part 5a using the mounting surface of the member in which the bending jig | tool 5 is mounted. Further, instead of providing the plate-like member 6 with the through hole 6a, the concave portion 5a may be directly formed.

  Each of the grooves 6b and 6c is formed to be slightly wider than the metal pins 3a and 3b to be arranged, and the linear metal pins 3a and 3b before being bent are positioned so as to straddle the through hole 6a. It is provided to be. Specifically, the through-hole 6a of the plate-like member 6 is formed such that the length between the opposing sides when viewed from above is shorter than the metal pins 3a and 3b, and can support both ends of the metal pins 3a and 3b. Thus, each groove | channel 6b, 6c is provided around the through-hole 6a. At this time, in each groove 6b, 6c, the two metal pins 3a, 3b are both arranged in parallel to one side of the through hole 6a having a rectangular shape when viewed from above, and another two metal pins 3b are provided. All are provided so as to be arranged in parallel to a side perpendicular to the one side of the through-hole 6a.

  Next, as shown in FIG. 3A, the two metal pins 3a are set in the respective grooves 6c, and both the metal pins 3a are parallel to one side of the through hole 6a. Position so as to straddle.

  Next, as shown in FIG. 3B, a pressing member 8 slightly smaller than the through hole 6a of the bending jig 5 is inserted into the through hole 6a and pressed against the bottom of the recess 5a. Then, as shown in FIG. 3 (c), both metal pins 3a are disposed in a direction perpendicular to the bottom wall 5a1 (see FIG. 2 (b)) of the recess 5a and the periphery of the bottom wall 5a1. It is bent along 5a2 (see FIG. 2B).

  Next, as shown in FIG. 3D, another two metal pins 3b are set in each groove 6b, and both metal pins 3b are parallel to the side perpendicular to the one side of the through hole 6a. In this state, positioning is performed so as to straddle the through-hole 6a.

  Next, as shown in FIG. 4A, both metal pins 3b are inserted in the through holes 6a in the same manner as the previous two metal pins 3a, and both metal pins 3b are bent. . Then, as shown in FIG. 4B, these metal pins 3b are also bent along the bottom wall 5a1 (see FIG. 2B) and the inner wall 5a2 (see FIG. 2B) of the recess 5a. It is done. At this time, as shown in FIG. 6, the metal pins 3a and 3b which are not arranged in parallel overlap each other at a portion along the bottom wall 5a1 of the recess 5a. Then, both metal pins 3a and 3b are connected (conducted) at the overlapped portion by ultrasonic bonding or the like. Note that the pressing member 8 may be used for ultrasonic bonding.

  Next, as shown in FIG. 4C, the concave portion 5a in which the bent metal pins 3a and 3b are arranged is filled with a resin containing magnetic powder to form the first resin layer 2 (see FIG. 4C). First resin layer forming step). At this time, in the first resin layer 2, the upper surface 2a is formed by the surface in contact with the bottom wall 5a1 of the recess 5a, and the side surface 2c is formed by the surface in contact with the inner wall 5a2 of the recess 5a. Further, each of the metal pins 5a and 5b is bent along the upper surface 2a and the side surface 2c of the first resin layer 2.

  Next, as shown in FIG. 4 (d), the metal pins 3a and 3b provided along the upper surface 2a and the side surface 2c of the first resin layer 2 are removed (separated) from the bending jig 5, 1 The resin layer 2 is fixed to the fixture 9 with the upper surface 2a facing upward.

  Next, dicing is performed along the gaps between the two sets of metal pins 3a and 3b arranged in parallel, and the dicing is divided into four (the one-dot chain line in FIG. 4D is a dicing line). As a result, four inductor electrodes 3 are formed in which the two metal pins 3a and 3b bent along the upper surface 2a and the side surface 2c of the first resin layer 2 are disposed. Hereinafter, the one in which the inductor electrode 3 is formed along the upper surface 2a and the side surface 2c of the first resin layer 2 may be referred to as an inductor electrode 3 with resin.

  Next, as shown in FIG. 5A, an interval forming jig 10 having recesses 10a for fixing the four resin-coated inductor electrodes 3 obtained by dividing at a predetermined interval is provided. Prepare and drop each resin-coated inductor electrode 3 into each recess 10a. The concave portions 10a are arranged at a desired interval.

  Next, as shown in FIG. 5B, the gap forming jig 10 is removed, and the resin-equipped inductor electrodes 3 are arranged and fixed at desired intervals.

  Next, as shown in FIG. 5C, the main surface 2a and the side surface 2c of the first resin layer 2 of each inductor electrode with resin 3 and the inductor electrode 3 are covered, and the gap between each inductor electrode with resin 3 is covered. The second resin layer 4 is formed by covering the resin so as to fill (second resin layer forming step). At this time, the second resin layer 4 is formed by the second resin layer 4 so as to cover the main surface 2a and the side surface 2c of the first resin layer 2 and not the lower surface 2b of the first resin layer 2. As a result, the first resin layer 2 and the second resin layer 4 surrounding the edge of the first resin layer 2 are exposed on the lower surface of the inductor component 1a. Further, both ends of the inductor electrode 3 are exposed at a portion where the first resin layer 2 is exposed on the lower surface of the inductor component 1a. However, in the present invention, after the lower surface 2b of the first resin layer 2 is covered by the second resin layer 4, the lower surface 2b of the first resin layer 2 and both ends of the inductor electrode 3 are polished or ground. May be.

  Finally, as shown in FIG. 5 (d), dicing is performed along the gap of the resin-coated inductor 3 (the one-dot chain line in FIG. 5 (c) is a dicing line) to obtain four inductor components 1a. The process from the step of arranging each metal pin 5a to the bending jig 5 shown in FIG. 3A to the step of bending each metal pin 5b shown in FIG. Corresponding to the “bending process”, the process from the step of placing each metal pin 5a on the bending jig 5 shown in FIG. 3A to the step of forming the first resin layer 2 shown in FIG. 4C. Corresponds to the “inductor forming step” of the present invention.

  Therefore, according to the above-described embodiment, by bending both the metal pins 3a and 3b constituting the inductor electrode 3, the portion along the side surface of the first resin layer 2 of the inductor electrode 3 (side surface portion 3a2, 3b2) as well as portions along the main surface (main surface side portions 3a1 and 3a2) can be formed of metal pins having a small specific resistance. If it does in this way, compared with the case where all the parts along the upper surface 2a of the 1st resin layer 2 of the inductor electrode 3 are formed with an electrically conductive paste, the resistance value of the inductor electrode 3 can be lowered | hung. Moreover, the characteristic (for example, Q value) of inductor component 1a can be improved because the resistance value of inductor electrode 3 falls.

  Further, when the inductor electrode is formed of a conductive paste, the rain width may be widened to obtain a desired resistance value. However, when the inductor electrode 3 is formed of metal pins 3a and 3b, a desired resistance value is obtained. Therefore, the inductor electrode 3 can be easily reduced in size, and consequently the inductor component 1a can be easily reduced in size.

  Further, since the inductor electrode 3 is formed by only the metal pins 3a and 3b, the direct current resistance of the inductor electrode 3 can be stabilized.

  Further, in the conventional inductor component 100 shown in FIG. 10, the metal pins 103 a and 103 b are erected on the resin layer 102, but a recess is formed in the resin layer 102, so that the manufacturing cost is high. As another method, there is a method in which each metal pin is erected on the resin layer by mounting each metal pin in a flat plate shape and then sealing with resin, but in any case, the metal pin is erected. This is expensive to manufacture. On the other hand, in the method of manufacturing the inductor component 1a according to this embodiment, since it is not necessary to stand the metal pins 3a and 3b, the inductor component 1a having excellent characteristics such as the Q value can be manufactured at low cost. . Further, since the portion along the side surface 2c of the first resin layer 2 and the portion along the upper surface of the inductor electrode 3 are formed at the same time by bending both the metal pins 3a and 3b, the resin as in the conventional inductor component 100 is formed. After the metal pins 103a and 103b are arranged in the layer 102, it is not necessary to separately form the upper and lower wiring electrodes 103c and 103d.

  Further, since the inductor electrode 3 can be formed by a simple method of bending along the bottom wall 5a1 and the inner wall 5a2 of the bending jig 5, the inductor component 1a having excellent characteristics such as Q value can be easily formed. Can be formed.

  Further, since both the first and second resin layers 2 and 4 are formed of a magnetic powder-containing resin, the inductance value by the inductor electrode 3 can be increased.

  Further, since both end portions of the inductor electrode 3 are exposed from the second resin layer 4, the connectivity with the outside of the inductor component 1a can be improved.

Second Embodiment
An inductor component 1b according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view of the inductor component 1b.

  The inductor component 1b according to this embodiment differs from the inductor component 1b of the first embodiment described with reference to FIG. 1 in that the configuration of the inductor electrode 30 is different as shown in FIG. Since the other configuration is the same as that of the inductor component 1a of the first embodiment, description thereof is omitted by attaching the same reference numerals.

  In this case, the two metal pins 3a and 3b have both side surfaces 3a2 and 3b2 arranged in parallel at a predetermined interval on the same surface of the side surface 2c of the first resin layer 2 and both main surfaces. The side portions 3a1 and 3b1 are arranged in parallel at the predetermined interval on the upper surface of the first resin layer. In other words, both the metal pins 3a and 3b are disposed so as not to overlap on the surface (the upper surface 2a and the side surface 2c) of the first resin layer 2. The inductor electrodes 30 are formed by connecting the ends of the main surface side portions 3a1 and 3b1 to each other by the wiring electrode 3c formed on the upper surface 2a of the first resin layer 2. The wiring electrode 3c can be formed of a conductive paste containing a metal such as Cu, Ag, or Al.

(Manufacturing method of inductor component 1b)
Next, a method for manufacturing the inductor component 1b will be described with reference to FIGS. 8 and 9 are diagrams for explaining a method of manufacturing the inductor component 1b. FIGS. 8A to 8D show the respective steps, and FIGS. FIG. 9C shows each step following FIG. In this embodiment, a method for manufacturing two inductor components 1b at a time will be described as an example, focusing on differences from the method for manufacturing the inductor component 1a of the first embodiment.

  First, as shown in FIG. 8A, a bending jig 50 having a plate-like member 6 having a through-hole 6a formed at the center and a bottom member 7 provided to close the bottom of the through-hole 6a. Is prepared (preparation step). In this case, the two straight metal pins 3a and 3b are arranged in parallel at a predetermined interval, and the through hole 6a on the upper surface of the plate-like member 6 is positioned so as to straddle the through hole 6a. A plurality of grooves 6d are formed around the. At this time, both the metal pins 3a and 3b are arranged so as to be parallel to one side of the through hole 6a that is rectangular when viewed from above.

  Next, as shown in FIG. 8B, two metal pins 3a and 3b are set in each groove 6d, and these metal pins 3a and 3b are parallel to the one side of the through hole 6a. In this state, positioning is performed so as to straddle the through-hole 6a.

  Next, in the same manner as the manufacturing method of the inductor component 1a of the first embodiment, the pressing member 8 is inserted into the through hole 6a and pressed against the bottom of the recess 5a. Then, both metal pins 3a and 3b are bent along the bottom wall 5a1 (see FIG. 2 (b)) and the inner wall 5a2 (see FIG. 2 (b)) of the recess 5a. Then, the first resin layer 2 is formed by filling the recess 5a with resin in the same manner as the method for manufacturing the inductor component 1a of the first embodiment.

  Next, as shown in FIG. 8C, the metal pins 3a and 3b disposed along the surface (the upper surface 2a and the side surface 2c) of the first resin layer 2 are removed from the bending jig 50 ( Separation), the first resin layer 2 is fixed to the fixture 9 with the upper surface 2a facing upward.

  Next, as shown in FIG. 8D, the upper surface 2a of the first resin layer 2 is connected so as to connect the centers in the length direction of the linear main surface portions 3a1 and 3b1 of the metal pins 3a and 3b. A wiring electrode 3c is formed on the substrate. At this time, the wiring electrode 3c is formed in a horizontally long rectangular shape whose longitudinal direction is perpendicular to both the metal pins 3a and 3b. Then, dicing is performed along a dicing line (see the alternate long and short dash line in FIG. 8D) parallel to the longitudinal direction of the wiring electrode 3c and passing through the center in the short direction of the wiring electrode 3c. Divide 2 into two. As a result, the two metal pins 3a, 3b formed to be bent along the upper surface 2a and the side surface 2c of the first resin layer 2, and the ends of the main surface side portions 3a1, 3b1 of the two metal pins 3a, 3b Inductor electrode 30 formed with wiring electrode 3c for connecting is formed. Hereinafter, the one in which the inductor electrode 30 is formed along the upper surface 2a and the side surface 2c of the first resin layer 2 may be referred to as an inductor electrode 30 with resin.

  Next, as shown in FIG. 9A, the two resin-equipped inductor electrodes 30 obtained by the division are dropped into the concave portions 10 a of the gap forming jig 10.

  Next, as shown in FIG. 9B, after the interval forming jig 10 is removed and the inductor electrodes 30 with resin are arranged and fixed at desired intervals, the inductor component 1a of the first embodiment is manufactured. The second resin layer 4 is formed in the same manner as the method.

  Finally, as shown in FIG. 9C, dicing is performed along the gap of the resin-coated inductor 30 (the one-dot chain line in FIG. 9B is a dicing line) to obtain two inductor components 1b.

  Therefore, according to this embodiment, part of the portion along the upper surface 2a of the first resin layer 2 of the inductor electrode 30 is formed by the main surface side portions 3a1 and 3b1 of the metal pins 3a and 3b. The resistance of the inductor electrode 30 can be reduced as compared with the case where all of the portions along the upper surface 2a of the first resin layer 2 of 30 are formed of a conductive paste. Moreover, both metal pins 3a and 3b can be easily connected.

  The present invention is not limited to the above-described embodiments, and various modifications other than those described above can be made without departing from the spirit of the invention. For example, the weight ratio of the magnetic powder of the second resin layer 4 may be higher than the weight ratio of the magnetic powder of the first resin layer 2. In this case, the metal component in the second resin layer 4 is larger than the metal component in the first resin layer 2, so that heat generated when the inductor electrodes 3 and 30 are energized is dissipated from the second resin layer 4. The heat dissipation characteristics can be improved.

  In addition, the resin forming the first and second resin layers 2 and 4 may be configured to contain an inorganic filler made of, for example, Si02 instead of the magnetic powder. Further, only one of the first and second resin layers 2 and 4 may contain the magnetic powder.

  Moreover, the shape of the upper surface 2a and the lower surface 2b of the 1st resin layer 2 is not restricted to a rectangular shape, It can change suitably, such as circular.

  Further, the present invention can be widely applied to inductor components including an inductor electrode provided inside a resin layer and a manufacturing method thereof.

1a, 1b Inductor component 2 First resin layer 2a Upper surface (main surface)
2b Bottom (back)
2c side surface 3,30 inductor electrode 3a, 3b metal pin (first and second metal pins)
3a1, 3b1 Main surface (first part)
3a2, 3b2 Side surface (second part)
5, 50 Bending jig 5a Recess 5a1 Bottom wall 5a2 Inner wall

Claims (9)

A first resin layer having a main surface and a side surface in a direction depending from the periphery of the main surface;
An inductor electrode in which bent first and second metal pins are arranged along the main surface and the side surface of the first resin layer;
The main surface and the side surface of the first resin layer, and a second resin layer covering the inductor electrode,
Each of the first and second metal pins has a first portion along the main surface of the first resin layer, and a second portion continuous with the first portion and along the side surface.
An inductor component, wherein an end of the second portion of each of the first and second metal pins is exposed on a back surface of the first resin layer facing the main surface.   2. The inductor component according to claim 1, wherein the inductor electrode is formed by directly connecting the first portion of the first metal pin and the first portion of the second metal pin.   The inductor electrode is a wiring in which an end portion of the first portion of the first metal pin and an end portion of the first portion of the second metal pin are formed on the main surface of the first resin layer. The inductor component according to claim 1, wherein the inductor component is connected via an electrode.   4. The inductor component according to claim 1, wherein the first resin layer is made of a magnetic substance-containing resin containing a magnetic filler. 5. The second resin layer is formed of a magnetic substance-containing resin containing a magnetic filler.
The inductor component according to claim 4, wherein a weight ratio of the magnetic filler in the second resin layer is higher than a weight ratio of the magnetic filler in the first resin layer.   6. The inductor component according to claim 1, wherein an end portion of the second portion of each of the metal pins constitutes an end portion of the inductor electrode. Inductor component comprising: a first resin layer having a main surface and a side surface in a direction depending from the periphery of the main surface; and an inductor electrode provided along the main surface and the side surface of the first resin layer In the manufacturing method of
A preparation step of preparing a bending jig formed with a recess having a bottom wall and an inner wall disposed in a direction perpendicular to the periphery of the bottom wall;
Bent first and second metal pins constituting the inductor electrode by pressing and bending the two metal pins so that both the metal pins are along the inner wall and the bottom wall of the recess. And a first resin layer forming step of forming a first resin layer by filling the recess with resin in a state where the first and second metal pins are bent in the recess. An inductor forming step of forming the inductor electrode along the main surface and the side surface of the first resin layer,
After the inductor electrode formed by the inductor forming step and the bending jig are separated, the main surface and the side surface of the first resin layer and a second resin layer that covers the inductor electrode are formed. A method of manufacturing an inductor component, comprising: a second resin layer forming step.   In the metal pin bending step, the first and second metal pins are bent so that they overlap at a portion along the bottom wall of the bending jig, and the first and second metal pins are directly pressed by the press at the overlapping portion. The method of manufacturing an inductor component according to claim 7, wherein the inductor component is connected. In the metal pin bending step, the first and second metal pins are bent so that the first and second metal pins do not overlap in the concave portion of the bending jig,
The inductor electrode is formed by forming a wiring electrode for connecting the first and second metal pins on the main surface of the first resin layer after the first resin layer forming step. The method for manufacturing an inductor component according to claim 7.

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