JP2008141202A - Coil device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet-like or thin-plate-like coil device that can ensure high power transmission efficiency, has an extremely small amount of magnetic spurious radiation, prevents overheat even after a long-term charge, and can be manufactured at low costs. <P>SOLUTION: Each of two curled rings composing basic patterns is in an equilateral triangle shape. The two curled rings are arranged back to back while the base of the outermost triangle is shared. The whole basic pattern is in a diamond-like S shape. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sheet-like or thin-plate-like coil device, and more particularly to a coil device suitable as an inductor, a transformer, a non-contact power transmission device, or the like.

  The present applicant has previously proposed a sheet-like or thin-plate coil device (planar inductor) suitable as an inductor, a transformer, a non-contact power transmission device, or the like according to Japanese Patent Application No. 2005-346039 (patent) Reference 1).

  According to this planar inductor, it is possible to easily design an element having an arbitrary area without being restricted by coil characteristics, and is necessary when performing contactless power transmission with a pair of devices facing each other. In addition, it is possible to deal with various electric powers in terms of area, and it is possible to obtain various advantages such that the planned cutting line for separation can be designed relatively freely and the degree of freedom in design is high.

However, in realizing a sheet-like or thin-plate coil device suitable for inductors and non-contact power transmission applications, there are still problems that cannot be solved in terms of power transmission efficiency, magnetic unnecessary radiation, heat generation, and manufacturing costs. It was.
WO 2007/063884 International Publication Pamphlet

  As described above, in the planar inductor device previously proposed by the present applicant, in the realization of a sheet-like or thin-plate coil device suitable as an inductor or a non-contact power transmission device, it is still necessary to transmit power. Problems to be solved remain in terms of efficiency, magnetic unnecessary radiation, heat generation, and manufacturing costs. In particular, this type of sheet-like or thin plate-like coil device is used for non-contact charging of a mobile phone recently, so that it is normal for a digital TV or a short-distance wireless card incorporated in the mobile phone. In order to guarantee proper operation, extremely high requirements are imposed on magnetic unnecessary radiation.

  Of course, since mobile phones are also home appliances, their non-contact charging is subject to extremely strong demands for the effects on other metals and electronic devices in the vicinity, or overheating due to their own heat generation. Needless to say.

  The present invention has been made paying attention to such conventional problems, and its object is to guarantee high power transmission efficiency, extremely low magnetic unnecessary radiation, and long time. An object of the present invention is to provide a sheet-like or thin-plate-like coil device that does not overheat even with time charging and can be manufactured at a lower cost.

  It is considered that the above technical problem can be solved by a sheet-like or thin-plate coil device having the following configuration.

  That is, the coil device includes a plurality of flat coils, a flat coil support layer that supports the flat coils in a state of being arranged in a plane, and a first coil provided on one surface side of the flat coil support layer. It has a wiring layer and a second wiring layer provided on the other surface side of the flat coil carrier layer.

  The winding start ends of the flat coils are commonly connected via the first wiring layer, and the winding end ends of the flat coils are commonly connected via the second wiring layer.

  As a result, a state in which a plurality of flat coils arranged in a plane are electrically connected in parallel appears between the first wiring layer and the second wiring layer.

  Each of the flat coils is a laminated coil formed by laminating a plurality of basic conductor patterns, and the basic pattern of each layer is a spiral pattern of linear conductor patterns a predetermined number of times around two parallel axes. And a substantially S-shaped pattern having two spiral rings wound in opposite directions.

  In addition, each of the two spiral rings constituting the basic pattern has an equilateral triangle shape, and is arranged back to back so as to share the bottom of the outermost peripheral triangle. It exhibits a letter shape.

  According to such a sheet-shaped or thin-plate-shaped coil device, in addition to having the basic structure previously proposed by the present applicant in Japanese Patent Application No. 2005-346039, a substantially S-shaped pattern which is a basic pattern is formed. Each of the spiral rings is an equilateral triangle, and is arranged back to back so as to share the base of the outermost peripheral triangle, and the entire basic pattern exhibits a rhombus-shaped S shape. In addition to using a triangle that easily concentrates the magnetic flux at the center of gravity, one basic pattern serves as both a clockwise and counterclockwise winding, which improves the efficiency of electromagnetic conversion by high-frequency current. Also, the manufacturing cost can be reduced by reducing the number of correlation connection vias by half compared to the case of forming an S-shaped pattern with two reverse windings.

  In a preferred embodiment of the present invention, the rhombic S-shaped basic pattern is distributed and arranged in each layer so that adjacent outermost conductor sides are parallel to each other, and Between the layers, the corresponding spiral rings are axially aligned.

  According to such a configuration, since the adjacent outermost conductor sides are distributed and arranged in parallel with each other, the current vectors are all directed in the same direction in the portion where the basic patterns are adjacent to each other. When a plurality of basic patterns having such a rhombus S-shape are arranged adjacent to each other, for example, when a regular hexagon is formed by arranging three basic patterns, the magnetic poles of the patterns adjacent to the two magnetic poles of each basic pattern Are equal distances, and as a result, magnetic push-bull operation is performed between the magnetic poles at the same distance, and it was confirmed that the magnetic unnecessary radiation generated as a whole was reduced as much as possible.

  In a preferred embodiment of the present invention, each vertex of the two equilateral triangular spiral rings constituting the basic pattern is cut along a line perpendicular to the bisector of the apex angle, Thus, the inner angles of the respective corners of the equilateral triangular spiral ring are all set to 120 degrees.

  According to such a configuration, in general, when applied to a high frequency (for example, 300 KHz to 10 MHz), when the bending angle of the linear conductor is 90 degrees or less, local large heat generation occurs, whereas the present invention has the following. Since the bending angle of each linear conductor is maintained at 120 degrees, the total heat generation amount at the bending corner of the linear conductor can be reduced as a whole, thereby improving transmission efficiency and overheating problems. .

  The sheet-shaped or thin-plate-shaped coil device of the present invention described above can be manufactured by using a multilayer wiring board manufacturing technique. According to such a multilayer wiring board manufacturing technique, the cross-sectional shape of the linear conductors constituting the basic pattern, the distance between adjacent conductors on the same surface, and the distance between conductors in the vertical direction can be precisely managed. It is possible to make the specified capacity between them uniform, to improve the balance of the circuit elements, and to exhibit the initial electromagnetic conversion capability.

  The sheet-like or thin-plate coil device described above can also be manufactured by using a semiconductor integrated circuit manufacturing technique. If such a semiconductor integrated circuit manufacturing technology is used, the basic pattern itself can be formed on a semiconductor substrate by a fine process, and therefore, the distance of movement of electrons between the basic patterns is shortened, and further high-frequency operation is achieved. In addition, since the coil device of the present invention has wiring layers on the upper and lower surfaces in the first place, even when incorporated in a semiconductor substrate, unnecessary radiation hardly affects other circuits from its structure. In an integrated circuit in which analog and digital are mixed, there is an advantage that there is little influence on both.

  According to the present invention, it is possible to provide a sheet-like or thin-plate coil device that has high electromagnetic conversion efficiency, excellent high-frequency characteristics, little unwanted radiation, does not overheat in use, and can be manufactured at low cost. it can.

  Hereinafter, a preferred embodiment of a sheet-like or thin-plate coil device according to the present invention will be described in detail with reference to the accompanying drawings.

  A cross-sectional view showing the configuration of the coil device (air core) according to the present invention is shown in FIG. This coil device is manufactured by using a multilayer wiring board manufacturing technique.

  As is apparent from the drawing, this coil device is configured by stacking six wiring boards including the first board B1 to the sixth board B6. L1 is an upper insulation coating, L2 is an upper power supply layer, L3 is a lower power supply layer, and L4 is a lower insulation coating.

  The upper power supply wiring layer L2 is a so-called uniform conductor surface (solid conductor) except for the portions of the magnetic flux transmission holes H1 and H2.

  The six wiring boards including the first board B1 to the sixth board B6 function as the first layer winding board to the sixth layer winding board, and the first winding pattern 1P is formed on these boards. A sixth winding pattern 6P is formed.

  An example of the winding patterns 1P to 6P is drawn as a unit pattern P in the upper space in the drawing. As is apparent from the figure, this unit pattern P includes a first portion P1 formed by winding a linear conductor around the coil axis in a counterclockwise direction from the inside to the outside, and the linear conductor around the coil axis. And a second portion P2 wound clockwise from the outside to the inside. The winding ring shape of the first portion P1 and the second portion P2 is a substantially equilateral triangle shape, and as a whole shares the base and the equilateral triangles share the bottom and are arranged so as to be back to back. It is comprised so that a rhombus shape may be exhibited.

  The first layer winding pattern 1P to the sixth layer winding pattern 6P are formed with slightly different shapes so that the directions of the currents flowing in the vertical correlation are the same between the odd number pattern and the even number pattern.

  The connection relationship will be described in order from the top. The upper power supply layer L2 is connected to the first portion P-1 of the first winding pattern 1P through the via V1. The inner peripheral end of the second portion P-2 of the first layer winding pattern 1P is connected to the second portion P-2 of the second layer winding pattern 2P through the via V2.

  Similarly, each layer winding pattern is alternately changed in position to the first portion P1 and the second portion P2, and connected to the lower winding pattern through the vias V3 to V6.

  Finally, the first portion P1 of the sixth layer winding pattern 6P is connected to the lower power supply layer L3 through the via V7. Thus, six S-shaped unit patterns P are connected in series between the upper power supply layer L2 and the lower power supply layer L3. Since the unit pattern P of each layer has an S-shape as is apparent from the figure, the current input from the inner peripheral end of the first portion P-1 is the inner peripheral end of the first portion P-1. Flows counterclockwise from the outer periphery to the bottom of the equilateral triangle, and then flows clockwise from the outer periphery to the inner periphery of the second portion P-2. Thereby, in the unit winding pattern P of each layer, a magnetic flux is generated in the opposite direction between the first portion P1 and the second portion P2, and so-called magnetic push-bull operation is performed for each winding pattern 1P to 6P. As a whole, the magnetic flux is added in the opposite direction in each of the first part P1 and the second part P2, and the accumulation and release of magnetic energy are efficiently repeated.

  Plan views of the respective wiring boards B1 to B6 in the coil device (air core) according to the present invention are shown in FIGS. That is, a plan view of the upper power supply layer (L2) in the coil device (air core) according to the present invention is shown in FIG. The square shape surrounding the periphery is the outer peripheral contour of the substrate.

  As shown in the figure, a regular hexagonal material exposed region 103 exists in almost the entire central portion of the substrate, and a conductor covered region 101 exists so as to surround this. Three lead patterns 102 extend from the conductor deposition region 101 toward substantially the center of the material exposure region 103, and a via V1 is provided at each tip. This visa V1 connects the upper power supply layer (L2) and the first layer winding pattern 1P. In addition, a through hole TH for connecting the power supply VDD to the lowermost substrate is formed at the upper right in the substrate outline.

  A plan view of the substrate (B1) constituting the first layer winding pattern in the coil device (air core) according to the present invention is shown in FIG.

  As shown in the figure, a regular hexagonal conductor in which three unit patterns 1PA, 1PB, and 1PC are closely combined so that the outermost conductors are parallel to each other at the center of the substrate B1. There is a pattern.

  Each of the three unit patterns 1PA, 1PB, 1PC has a first portion 1PA-1, 1PB-1, 1PC-1 and a second portion 1PA-2, 1PB-2, 1PC-2.

  The inner peripheral ends of the first portions 1PA-1, 1PB-1, and 1PC-1 are supplied with power from the upper power supply layer (L2) through the via V1. The inner peripheral ends of the second portions 1PA-2, 1PB-2, and 1PC-2 are connected to the second layer winding pattern 2P through the via V2.

  As is apparent from the figure, the spiral shape of the first portion 1PA-1, 1PB-1, 1PC-1 of the unit pattern is an equilateral triangle that is wound counterclockwise from the inner peripheral side to the outer peripheral side. The spiral shapes of the second portions 1PA-2, 1PB-2, and 1PC-2 are equilateral triangles that are wound clockwise from the outer periphery toward the inner periphery.

  In other words, the first portions 1PA-1, 1PB-1, 1PC-1 and the second portions 1PA-2, 1PB-2, 1PC-2 constituting the unit patterns 1PA, 1PB, 1PC share the base. And it is comprised by two triangular shapes arrange | positioned so that it may mutually become back-to-back, and will exhibit a rhombus shape as a whole.

  As a result, when the unit patterns 1PA, 1PB, and 1PC having these three rhombus shapes are closely combined so that the outermost sides are parallel to each other, a regular hexagonal shape is completed, as will be described in detail later. The conductor sides adjacent to each other in the unit patterns have the same current direction, and the N pole and S pole located at the center of the first part and the second part have the same distance between the adjacent poles, and the magnetic flux Is less likely to leak out from the hexagonal outline.

  As a result, according to the regular hexagonal winding pattern formed by combining these three rhombus shapes, the current flowing through each side of the regular triangle efficiently concentrates the magnetic flux on the corresponding magnetic pole. The generated magnetic flux does not easily leak to the outside of a conductor pattern having a regular hexagon, and the two parts constituting each unit pattern 1PA, 1PB, 1PC are the same shape and symmetrical, so that the magnetic balance is optimal. Therefore, good efficiency can be obtained.

  FIG. 4 shows a plan view of the substrate (B2) constituting the second layer winding pattern in the coil device (air core) according to the present invention. In the figure, 2PA, 2PB, and 2PC are the first, second, and third unit patterns, and 2PA-1, 2PB-1, and 2PC-1 are the first portion and 2PA- in the first to third unit patterns. 2, 2PB-2 and 2PC-2 are second portions in the first to third unit patterns, TH is a through hole, 121 is a material exposed region, V2 is a via leading to the first layer winding pattern, and V3 is a first portion. Vias leading to a three-layer winding pattern.

  FIG. 5 shows a plan view of the substrate (B3) constituting the third layer winding pattern in the coil device (air core) according to the present invention. In the figure, 3PA, 3PB and 3PC are the first, second and third unit patterns, 3PA-1, 3PB-1 and 3PC-1 are the first parts of the first, second and third unit patterns, 3PA. −2, 3PB-2, 3PC-2 are second portions of the first, second, and third unit patterns, V3 is a via that leads to the second layer winding pattern, and V4 is a via that leads to the fourth layer winding pattern. It is.

  A plan view of the substrate (B4) constituting the fourth layer winding pattern in the coil device (air core) according to the present invention is shown in FIG.

  In the figure, 4PA, 4PB, and 4PC are the first, second, and third unit patterns, and 4PA-1, 4PB-1, and 4PC-1 are the first portions of the first, second, and third unit patterns. 4PA-2, 4PB-2, and 4PC-2 are the second portions of the first, second, and third unit patterns, V4 is a via that leads to the third layer winding pattern, and V5 is the fifth layer winding pattern. A via that leads to

  A plan view of the substrate (B5) constituting the fifth layer winding pattern in the coil device (air core) according to the present invention is shown in FIG.

  In the figure, PA, 5PB, and 5PC are the first, second, and third unit patterns, and 5PA-1, 5PB-1, and 5PC-1 are the first portions of the first, second, and third unit patterns. 5PA-2, 5PB-2, and 5PC-2 are the second portions of the first, second, and third unit patterns, V5 is a via that leads to the fourth layer winding pattern, and V6 is the sixth layer winding. A via 151 leading to the pattern is a material exposure area.

  FIG. 8 shows a plan view of the substrate (B6) constituting the sixth layer winding pattern in the coil device (air core) according to the present invention.

  In the figure, 6PA, 6PB, and 6PC are the first, second, and third unit patterns, and 6PA-1, 6PB-1, and 6PC-1 are the first portions of the first, second, and third unit patterns. , 6PA-2, 6PB-2, and 6PC-2 are the third portions of the first, second, and third unit patterns, V6 is a via that leads to the fifth layer winding pattern, and V7 is to the lower power supply layer. Reference numeral 161 denotes a material exposure region.

  A bottom view of the substrate (B6) constituting the lower power supply layer (L3) in the coil device (air core) according to the present invention is shown in FIG.

  In the figure, 171 is a conductor deposition region, 172 is a material exposed region, 173 is a GND terminal, TH is a through hole, 702 is a lead pattern, and V7 is a via leading to a sixth layer winding pattern.

  As described above, according to the coil device (air core) shown in FIGS. 1 to 9, the equilateral triangle constituting the first portion P <b> 1 and the equilateral triangle constituting the second portion P <b> 2 have the bottom sides of both. Since the shared portion M (see FIG. 1) is used, as is clear from the cross-sectional view of FIG. 1, the magnetic field is not canceled out by currents flowing in different directions as in the case where the bases of both triangles exist separately. This also contributes to improving the efficiency of the coil device of this embodiment. That is, the current flowing through the shared part M causes a push-bull operation in which the magnetic flux in the central part of the first part P-1 is added in a certain direction and the magnetic flux passing through the central part of the second part P-2 is reduced. It will contribute directly.

  In the embodiment described above, the first part P-1 and the second part P-2 are so-called air-core cores that do not have a core made of a magnetic material. Of course, it is good also as a cored coil which penetrated the magnetic core in the center of the part P-2.

  An embodiment with such a cored core is shown in FIGS. In these drawings, K1 is a cylindrical core that penetrates the axis of the first portion P-1, and K2 is a cylindrical core that penetrates the axis of the second portion P-2. The cross-sectional shapes of these cores K1 and K2 are each an equilateral triangle. Precisely, even though it is an equilateral triangle, each of the three vertices is cut along a straight line perpendicular to the bisector of each apex angle, resulting in a deformed hexagonal shape. . As described later, this irregular hexagonal shape is related to the fact that the inner angle of the winding pattern surrounding the hexagonal shape becomes 120 degrees.

  In addition, about the detail of the coil | winding pattern shown by FIGS. 11-18, it has the core through-hole 104,112,122,132,142,152,162,172 for penetrating cylindrical core K1, K2. Except for the above, it is the same as in the previous embodiment, so a duplicate description is omitted.

  Next, the design rules applied to the coil device of the above embodiment will be described in detail with reference to FIGS.

  FIG. 19 shows an explanatory diagram of countermeasures against heat generated by the high-frequency current. As shown in the figure, the equilateral triangles constituting the first part or the second part constituting the unit pattern are, for example, two vertices of the respective apex angles as indicated by three vertices P, Q, and R, respectively. Cut along a straight line X orthogonal to the segment. As a result, the inner angles of the corner portions of the linear conductor wound in a spiral shape are all 120 degrees, and heat generation when the high-frequency current flows through the winding pattern is suppressed as much as possible.

  FIG. 20 shows the design values of the line spacing of each oblique side and the line spacing of each corner side. As shown in the figure, when the line interval between the oblique sides is a, the line interval between the sides of each corner is 2a. According to such a configuration, each layer winding pattern is orderly overlapped between the upper and lower sides, and the bending angles of the linear conductors are all unified to 120 degrees, so that the overall heat generation can be efficiently reduced.

  The design values of the dimensions of the first portion of the basic pattern are shown in FIG. Naturally, since it is an equilateral triangle, the lengths of the three sides A, B, and C are equal to b, and the length of the line segment W generated by cutting the three apex angles is a, one corner portion. The length W of the line segment at is a-2. By complying with such a design rule, it is possible to realize an optimal conductor interval and a reduction in heat generation.

  An explanatory diagram of a current vector flowing through the linear conductors adjacent between the unit patterns is shown in FIG. As described above, when a regular hexagonal shape is created by combining three unit patterns having a rhombus shape as a whole, directions of currents flowing through conductors between adjacent unit patterns become equal. For this reason, the magnetic fields are added in a well-balanced manner, and the electromagnetic conversion efficiency is good.

  FIG. 23 shows an explanatory diagram showing the flow of magnetic flux when the three unit patterns are combined into a hexagonal shape as a whole. As can be seen from FIG. 23, the three sets of magnetic poles (N1, S1), (N2, S2), (N3, S3) constituting the unit pattern are equal to each other, as is clear from the direction of current in FIG. The distance between the power supply terminals of these unit patterns is connected in parallel, so that the magnetic field generated from each magnetic pole flows into the adjacent magnetic pole, and leakage from the hexagonal contour to the outside is suppressed as much as possible. . From this, according to the coil device having the regular hexagonal winding pattern shown in FIG. 23, for example, even when embedded in the bottom or lid of a mobile phone, the influence on the adjacent electronic circuit is greatly reduced, In fact, it has been confirmed that there is no problem in viewing digital TV and using a short-distance data communication card even when incorporated in a mobile phone.

  An explanatory diagram of an example in which 16 unit patterns are combined to form a hexagon is shown in FIG. As shown in the figure, the unit hexagonal pattern formed by combining the three rhomboid unit patterns described above realizes a planar coil of an arbitrary size by combining a plurality of the unit hexagonal patterns adjacent to each other in an orderly manner. Can do. Therefore, by setting such a planar coil to an appropriate size, not only non-contact charging of a mobile phone, but also charging of a cordless mouse by a mouse pad and other efficient portable electronic devices can be performed. Can be done. In particular, as described repeatedly, the coil device according to the present invention is not only efficient, but also has extremely low unnecessary electromagnetic radiation, overheating of the equipment, etc. Therefore, it does not adversely affect the viewing of digital TV and the operation of the short-range data communication card, and thus contributes to practical use for this kind of non-contact power transmission.

  Finally, FIG. 25 shows a diagram comparing the frequency characteristics of the inductance. In the figure, the curve indicated by reference numeral 201 is a cylindrical coil, the curve indicated by reference numeral 202 is a flat coil, the curve indicated by reference numeral 203 is a sheet coil according to the present invention, and the curve indicated by reference numeral 204 is a cylindrical S-shape. The frequency characteristics of the coil are shown.

  Here, the cylindrical coil denoted by reference numeral 201 is a 36-turn coil made of a conducting wire having a diameter of 12 mm and a wire diameter of 0.7 mm. The flat coil indicated by reference numeral 202 is a 24-turn coil with a ribbon wire having a diameter of 35 mm and a wire diameter of 0.8 × 0.4 mm, and the sheet coil indicated by reference numeral 203 is a coil proposed in the present invention, This is a flat coil in which three sets of eight S-shaped coils connected in S-shape with equilateral triangular 8-turn coils are connected in parallel. The cylindrical S-shaped coil denoted by reference numeral 204 is an 18-S coil with a conducting wire having a diameter of 12 mm and a wire diameter of 0.7 mm.

  As is apparent from the graph, it was confirmed that the sheet coil 203 according to the present invention can provide a stable inductance value independent of the frequency in the region of 12.8 KHz or higher as compared with these other coils. . In particular, compared with the flat coil 202 that is expected to be used for non-contact transmission recently, the sheet coil according to the present invention can obtain a much higher inductance value in a region higher than approximately 25.5 KHz. Was confirmed.

  In the sheet coil curve indicated by reference numeral 203, the peak of about 25.6 KHz can be arbitrarily moved by selecting a circuit resonance point. Therefore, according to the sheet coil of the present invention, in addition to high transmission efficiency, low unnecessary radiation, low heat generation, etc., the amount of power transmitted per area is extremely large, and it is stable and high in the high frequency range. An inductance value can be obtained, and high frequency characteristics required for this type of coil can be sufficiently satisfied.

  In other words, according to the sheet coil of the present invention, it can be said that the inductance per unit volume is large. Therefore, as a future prospect, the above-described sheet coil can be incorporated into the main board of the mobile phone itself. As a result, there is also an advantage that the mounting area on the circuit board of the mobile phone is virtually not consumed.

  According to the present invention, it is possible to provide a coil device that has good power transmission efficiency, little magnetic unnecessary radiation, little heat generation, can stably obtain high inductance in a high frequency range, and can be manufactured at low cost. it can.

It is sectional drawing which shows the structure of the coil apparatus (air core) which concerns on this invention. It is a top view of the upper side power supply layer (L2) in the coil apparatus (air core) which concerns on this invention. It is a top view of the board | substrate (B1) which comprises the 1st layer winding pattern in the coil apparatus (air core) which concerns on this invention. It is a top view of the board | substrate (B2) which comprises the 2nd layer winding pattern in the coil apparatus (air core) which concerns on this invention. It is a top view of the board | substrate (B3) which comprises the 3rd layer winding pattern in the coil apparatus (air core) which concerns on this invention. It is a top view of the board | substrate (B4) which comprises the 4th layer winding pattern in the coil apparatus (air core) which concerns on this invention. It is a top view of the board | substrate (B5) which comprises the 5th layer winding pattern in the coil apparatus (air core) which concerns on this invention. It is a top view of the board | substrate (B6) which comprises the 6th layer winding pattern in the coil apparatus (air core) which concerns on this invention. It is a bottom view of the board | substrate (L3) which comprises the lower side power supply layer (GND) in the coil apparatus (air core) which concerns on this invention. It is sectional drawing which shows the structure of the coil apparatus (core core) which concerns on this invention. It is a top view of the board | substrate (L2) which comprises the upper side power supply layer (VDD) in the coil apparatus (core) which concerns on this invention. It is a top view of the board | substrate (B1) which comprises the 1st layer winding pattern in the coil apparatus (core) which concerns on this invention. It is a top view of the board | substrate (B2) which comprises the 2nd layer winding pattern in the coil apparatus (core) which concerns on this invention. It is a top view of the board | substrate (B3) which comprises the 3rd layer winding pattern in the coil apparatus (core) which concerns on this invention. It is a top view of the board | substrate (B4) which comprises the 4th layer winding pattern in the coil apparatus (core) which concerns on this invention. It is a top view of the board | substrate (B5) which comprises the 5th layer winding pattern in the coil apparatus (core) which concerns on this invention. It is a top view of the board | substrate (B6) which comprises the 6th layer winding pattern in the coil apparatus (core) which concerns on this invention. It is a top view of the lower side power supply layer (L3) in the coil apparatus (core) which concerns on this invention. It is explanatory drawing of the heat_generation | fever effect by a high frequency current. This is the design value of the line spacing of the oblique sides and the inter-line angle of each corner. It is a design value of the dimension of each part of the 1st part of a basic pattern. It is explanatory drawing of the current vector which flows through the linear conductor adjacent between unit patterns. It is explanatory drawing which shows the flow of magnetic flux when combining three unit patterns and making it hexagonal as a whole. It is explanatory drawing of the example which combined 16 unit patterns and made it hexagonal shape. It is a figure which compares and shows the frequency characteristic of an inductance.

Explanation of symbols

101,172 Conductor deposition area 102,702 Lead pattern 103,111,121,131,141,151,161,171 Material exposed area 104,112,122,132,142,152,162,172 Core through hole 173 GND Terminal P Unit pattern P-1 First part P-2 Second part PA, PB, PC Unit pattern PA-1, PB-1, PC-1 Unit pattern first part PA-2, PB-2, PC- 2 Second part of unit pattern 1P to 6P Winding pattern B1 to B6 Winding base L1 Upper insulating coating L2 Upper power supply (VDD) layer L3 Lower power supply (GND) layer L4 Lower insulating coating v1 to v7 Via TH, H Through hole 1M, 5M, 6M Common part V1-V7 Via H1, H2 Magnetic flux transmission hole K1, K2 Cylindrical core

Claims (5)

A plurality of flat coils;
A flat coil-carrying layer that carries the flat coils in a state of being arranged in a plane,
A first wiring layer provided on one surface side of the flat coil carrier layer and a second wiring layer provided on the other surface side of the flat coil carrier layer, and winding start of each flat coil The ends are commonly connected via the first wiring layer, and the winding end ends of the respective flat coils are commonly connected via the second wiring layer,
Thus, a sheet or thin plate shape in which a plurality of flat coils arranged in a plane are electrically connected in parallel between the first wiring layer and the second wiring layer. Coil device,
Each of the flat coils
It is a laminated coil formed by laminating a plurality of basic conductor patterns,
The basic pattern of each layer is substantially S-shaped having two spiral rings in which a linear conductor pattern is spirally wound in a direction opposite to each other a predetermined number of times around two parallel axes. Pattern,
Each of the two spiral rings constituting the basic pattern is an equilateral triangle, and is arranged back to back so as to share the base of the outermost peripheral triangle, and the entire basic pattern has a rhombic S-shape. Coil device characterized by this.   The rhombic S-shaped basic pattern is distributed and aligned in each layer so that adjacent outermost conductor sides are parallel to each other, and for each corresponding spiral ring in each layer The coil device according to claim 1, wherein the coil device is axially aligned.   Each vertex of the two equilateral triangular spiral rings constituting the basic pattern is cut along a line perpendicular to the bisector of the apex angle, whereby each corner of the equilateral triangular spiral ring The coil device according to claim 2, wherein the inner angle of the coil device is 120 degrees.   The coil device according to claim 1, wherein the coil device is manufactured by using a manufacturing technique of a multilayer wiring board.   The coil device according to claim 1, wherein the coil device is manufactured using a manufacturing technique of a semiconductor integrated circuit.

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