CN205104335U - Coil and with inductance element and circuit of its preparation - Google Patents
Coil and with inductance element and circuit of its preparation Download PDFInfo
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- CN205104335U CN205104335U CN201520714783.XU CN201520714783U CN205104335U CN 205104335 U CN205104335 U CN 205104335U CN 201520714783 U CN201520714783 U CN 201520714783U CN 205104335 U CN205104335 U CN 205104335U
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Abstract
The utility model provides a coil and inductance element and the circuit prepared with the coil. The coil includes the multilayer conducting layer, and wherein at least two -layer conducting layer includes at least one conducting ring, wherein the conducting ring passes through electrical connection and forms the coil, and first termination electrode is connected with outside conducting ring, and the second termination electrode is connected with inside conducting ring, and the geometric centre who has the conducting ring of one deck conducting layer at least is rather than upper story and/or geometric centre mutual misalignment on the space of the conducting ring of one deck conducting layer down. The coil comprises the spiral conducting ring, and the width of spiral conducting ring is not identical. The coil can be used for preparing the inductance element of high inductance value, can use in the circuit widely. Each layer conducting layer of coil can be through adopting the preparation of semiconductor technology or PCB technology. This coil has high inductance value and high figure of merit Q value, can also effectively reduce spurious coupling electric capacity.
Description
Technical field
The utility model relates to technical field of electronic devices, particularly relates to a kind of coil and with its inductance element prepared and circuit.
Background technology
Inductance is that the one in electronic circuit commonly uses components and parts, must have at least one conductive coil for the inductance element in integrated circuit or printed circuit board (PCB).Along with the development of integrated circuit technique, single conductive layer or plurality of conductive layers is usually adopted to prepare these components and parts.If but adopt single layer structure, usual coil needs to take larger area to obtain larger inductance, therefore adopts the coil of multilayer conductive Rotating fields to design inductance element.But there is the defect of some keys, the such as defect etc. of self-resonant frequency and Q value aspect based on the inductance element of the coil of multilayer conductive Rotating fields.
Such as, patent publication No. is: 2013/0,106, the U.S. Patent application of 554A1, provide a kind of inductance element and preparation method thereof, this induction structure comprises: a kind of base material and deposition multiple bottom spiral inductances on the base material, and at least one is deposited on the top layer spiral inductance of bottom spiral inductance, and bottom spiral inductance, middle level spiral inductance and top layer spiral inductance are mutually isolated in order to form an inductance coil by insulating material.
In addition, the patent No. is: 7,489,220,8,941,212,8,754,736,8,279,036,8,441,333,6,417,755,7,370,403,6,534,406,7,782,166,5,656, the United States Patent (USP) of 849 and publication number are: 20070/001796,2011/0133877,20050/104158,2012/0249276, many american documentation literatures in individually disclose the stack spiral inductance of various different structure.
Comprehensive above-mentioned shown various stack Meander line inductor, its structure generally includes and comprises one or more conducting ring, and these conducting rings are distributed on sandwich construction and form coil.In sandwich construction, every one deck at least comprises a conducting ring.The conducting ring of every one deck is electrically connected by the contact layer on conductive hole pair and dielectric substrate.
But as a rule, have in the inductance coil of plurality of conductive layers, as shown in Figure 4.Upper conductive layer and underlying conductive layer are aligned with each other, and the conducting ring of proper alignment on each conductive layer is electrically connected by conductive hole, and two termination electrodes lay respectively on the external conductive ring of Upper conductive layer and underlying conductive layer.Like this can be very large to the performance impact of inductance element, such as can reduce self-resonant frequency and the quality factor q of inductance element.Therefore the appearance of the inductance element of exigence high q-factor and high self resonant frequency.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of coil for the preparation of inductance element and inductance element.The feature of described coil is: have high inductance value, high self resonant frequency and high quality factor Q.
To achieve these goals and other relevant objects, the utility model provides a kind of coil, and it at least comprises:
Plurality of conductive layers, wherein has at least two conductive layers respectively to comprise at least one conducting ring; Described conducting ring is all electrically connected to form coil; The first end electrode of described coil is connected with external conductive ring, and the second termination electrode is connected with inner conductive ring; And have the conducting ring of the geometric center of the conducting ring of one deck conductive layer or conducting ring section and its last layer and/or lower one deck or the geometric center spatially misalignment mutually of conducting ring section at least.External conductive ring can be the most external conducting ring of one deck conductive layer, and inner conductive ring can be the penetralia conducting ring of its adjacent conductive layer, and described external conductive ring and inner conductive ring can be included in different conductive layers; Conducting ring can be spiral conducting ring, and the width of spiral conducting ring is also incomplete same.
Preferably, wherein have at least one deck conductive layer to comprise conducting bridge, conducting bridge is configured to inner conductive ring to be connected with the second termination electrode.The conductive layer comprising conducting bridge can comprise conducting ring, also can not comprise conducting ring.
Preferably, this coil can comprise two conductive layers, and wherein every layer of conductive layer comprises at least one conducting ring; And each conducting ring is all electrically connected to form coil; The first end electrode of described coil is connected with the external conductive ring of ground floor conductive layer, and the second termination electrode of described coil is connected with the inner conductive ring of second layer conductive layer; And ground floor conductive layer conducting ring or the geometric center spatially mutually misalignment of the geometric center of conducting ring section and the conducting ring of second layer conductive layer or conducting ring section.
Preferably, the ground floor conductive layer of this coil or second layer conductive layer comprise a conducting bridge further, and this conducting bridge is configured to the inner conductive ring of second layer conductive layer to be connected with the second termination electrode.Alternately, this coil also may further include third layer conductive layer, and wherein third layer conductive layer comprises a conducting bridge, and this conducting bridge is configured to the inner conductive ring of second layer conductive layer to be connected with the second termination electrode.
Preferably, the shape of conducting ring can be class square, and mixing square is oval, octagon, circle, one or more in closed curve.
Preferably, spiral conducting ring is divided into multiple conducting ring section, and wherein the first end-rings section and the second end-rings section form first group of conducting ring section, and other middle conducting ring section forms second group of conducting ring section.
Preferably, one deck conductive layer of described coil comprises an independent conducting ring section further, the parallel placement of the first end-rings section of this conducting ring section and external conductive ring, and by intersect cross-bridges or conductive hole interconnected to realizing.
Preferably, the width of the conducting ring section in same conductive layer is also incomplete same.
Preferably, second group of conducting ring section of each conducting ring in same conductive layer is connected with the conducting ring of other layers by the first end-rings section in its first group of conducting ring section and/or the second end-rings section.
Preferably, described conducting ring is mutually isolated by insulating material, and conducting ring in every one deck is electrically connected by intersecting the conducting ring of cross-bridges or conducting block pair and other layers.
Preferably, first group of described conducting ring section has the first width, and second group of conducting ring section has the second width, and wherein the first width is less than the second width.
Preferably, the first end-rings section of described conducting ring and/or the second end-rings section realize interconnected by intersecting the first end-rings section of conducting ring of cross-bridges or conductive hole pair and other conductive layers and/or the second end-rings section.
Preferably, the conducting ring section that second group of conducting ring section of each conducting ring in one deck conductive layer is adjacent the same position of second group of the conducting ring of the same position of layer is placed one by one face-to-face.
Preferably, first end electrode is connected with the first end-rings section of described external conductive ring, and the second termination electrode is connected with the second end-rings section of described inner conductive ring.
Preferably, one deck conductive layer of this coil has N number of conducting ring, and its adjacent conductive layer can comprise N number of or N-1 or N+1 conducting ring.
Preferably, coil is made up of multiple conducting ring, and wherein each conducting ring has different width.
The utility model additionally provides a kind of inductance element, it is characterized in that: comprise multiple have above-mentioned feature coil, wherein each coil carries out being connected in series to form inductance element.
The utility model additionally provides a kind of circuit, it is characterized in that: comprise at least one inductance element with above-mentioned feature and/or at least one coil as above.
As mentioned above, coil of the present utility model has following beneficial effect: high impedance value, interlayer sneak coupling capacitance are little of, high corresponding frequencies and high q-factor.
Accompanying drawing explanation
Fig. 1 is shown as the utility model for making the preferred schematic diagram with 12 turn coil of inductance element.
Fig. 2 is shown as the preferred schematic diagram of three layers of conductive layer distribution of the coil in Fig. 1.
Fig. 3 is shown as the utility model for making the preferred schematic diagram with three layers of conductive layer distribution of 4 turn coil of inductance element.
Fig. 4 is shown as the preferred schematic diagram that preparation in background technology has three layers of conductive layer distribution of 4 turn coil.
Fig. 5 is shown as the schematic diagram with the Upper conductive layer of 4 turn coil and the distribution path of intermediate conductive layer as shown in Figure 3.This schematic diagram illustrates the voltage's distribiuting along path.
Fig. 6 is shown as the schematic diagram as shown in Figure 4 with the Upper conductive layer of 4 turn coil and the distribution path of intermediate conductive layer.This schematic diagram illustrates the voltage's distribiuting when the bias voltage of coil is 1V along distribution path.
Fig. 7 is shown as the preferred schematic diagram of inductance element of the present utility model.
Fig. 8 is shown as the preferred schematic diagram of 3 kinds of conducting rings of the present utility model.
The conceptual scheme that the electricity that Fig. 9 illustrates two adjacent lines of series connection stores.
Element numbers explanation
12; 13,14,15,16,17 conducting rings
18,19,20,21,22,23 conducting rings
33,34,35,36 conducting rings
10,11,30,31 termination electrodes
24,26,27 intersection cross-bridges or conductive holes pair
25,30 independent conducting ring sections
81,82,83,84,85 conducting ring sections
Embodiment
By particular specific embodiment, execution mode of the present utility model is described below, the understanding being familiar with this technology the content disclosed by the utility model book can understand other advantages of the present utility model and effect easily.
Refer to Fig. 1 to Fig. 9.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the qualifications that can implement of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, all should fall within scope that technology contents that the utility model discloses can contain.Simultaneously, quote in this specification 1 as " on ", D score, "left", "right", " in " and the term of " " etc., also only understand for ease of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
Coil provided by the utility model comprises plurality of conductive layers.Plurality of conductive layers, wherein have at least two conductive layers respectively to comprise at least one conducting ring, the conducting ring in the utility model can be spiral conducting ring; Described conducting ring is all electrically connected formation coil; The first end electrode of described coil is connected with external conductive ring, and the second termination electrode is connected with inner conductive ring; And have the conducting ring of the geometric center of the conducting ring of one deck conductive layer or conducting ring section and its last layer and/or lower one deck or the geometric center spatially misalignment mutually of conducting ring section at least.External conductive ring can be the most external conducting ring of one deck conductive layer, and inner conductive ring can be the penetralia conducting ring of its adjacent conductive layer, and described external conductive ring and inner conductive ring can be included in different conductive layers; Described conducting ring can be spiral conducting ring, and the width of spiral conducting ring is also incomplete same.
Described coil has at least one deck conductive layer to comprise conducting bridge, and conducting bridge is configured to the second termination electrode to be connected with inner conductive ring.Described external conductive ring refers to the outermost layer conducting ring of one deck conductive layer, and described inner conductive ring refers to the penetralia conducting ring of one deck conductive layer.Preferably, external conductive ring can belong to different conductive layers from inner conductive ring.
Inductance element provided by the utility model, it comprises multiple above-mentioned coil, and multiple coils connected in series is together to form inductance element.Circuit provided by the utility model, it at least comprises an above-mentioned inductance element and/or at least one above-mentioned coil.
Above-mentioned coil provided by the utility model can realize at substrate layer by layer deposition, and described conducting ring is isolated each other by insulating material, and described substrate can be semiconductor base or printed circuit board (PCB) (PCB).
Embodiment 1:
Specific embodiment will by be aided with explanation in the utility model accompanying drawing.Fig. 1 is shown as the utility model for making the preferred schematic diagram with 12 turn coil of inductance element.Fig. 2 is shown as the preferred schematic diagram distributed with three of the coil in Fig. 1 layers of conductive layer.This coil comprises 3 layers of conductive layer, and the conducting ring of this coil can be spiral conducting ring, and the width of spiral conducting ring is also incomplete same.Upper conductive layer has 6 conducting rings, and but these 6 conducting rings have identical shape vary in size, and their marshallings; Intermediate conductive layer has 6 conducting rings, and but these 6 conducting rings have identical shape vary in size, and their marshallings; Underlying conductive layer has a conducting bridge, and the penetralia conducting ring of intermediate conductive layer is connected with the second termination electrode 11 by this conducting bridge.It should be noted that conducting bridge also can be included in intermediate conductive layer or Upper conductive layer, so this coil just only uses 2 layers of conductive layer can complete the repertoire of this coil.The first end electrode of this coil is connected with the external conductive ring 12 of Upper conductive layer, and the second termination electrode is connected with the inner conductive ring 23 of intermediate conductive layer.Conducting ring in this coil is square, and inductance coil always has 12 coils.The thickness of the adjacent conductive layer of three shown in Fig. 2 is identical, and distance between adjacent conductive layer is equal, and the conducting ring that is in each conductive layer is equal with the distance of the conducting ring in adjacent conductive layer.Conducting ring is mutually isolated by insulating material, and conducting ring in every one deck is electrically connected by intersecting the conducting ring of cross-bridges or conductive hole pair and other layers.
The shape of conducting ring can be one or more in the square shown in Fig. 8, class square, octagon, also can be mixing square, circle, closed curve one or more.Each conducting ring of the coil shown in Fig. 1 can be divided into 5 conducting ring sections, suppose that the conducting ring of coil shown in Fig. 1 is similar with first spiral conducting ring in Fig. 8, then this conducting ring is divided into 5 conducting ring sections 81,82,83,84,85, conducting ring section can be metallic traces ring section, can be gold, copper, the metals such as aluminium; Second end conductive ring section 85 parallels placement with the first end conductive ring section 81; Have certain spacing between first end conductive ring section 81 and the second end conductive ring section 85, the size of spacing can be determined according to practical application; 5 conducting ring sections can be divided into 2 groups, and first group comprises 3 middle conducting ring sections 82,83,84, and their width is identical; Second group comprises 2 end conductive ring sections 81,85, first end conductive ring section 81 and the second end conductive ring section 85 has identical width, but the width of the conducting ring section of their width than first group is little.
For the conducting ring of 6 in Upper conductive layer by intersecting cross-bridges or conductive hole to being electrically connected with 6 conducting rings of same position in intermediate conductive layer respectively, second group of conducting ring section of apparent each conducting ring is connected with the conducting ring of other layers by the first end-rings section in first group of conducting ring section and/or the second end-rings section, and namely the first end-rings section of described conducting ring and/or the second end-rings section realize interconnected by intersecting the first end-rings section of conducting ring of cross-bridges or conductive hole pair and other conductive layers and/or the second end-rings section.Wherein intersection cross-bridges and conductive hole are to being all metal filled, can be copper, aluminium, and gold waits metal.The conducting ring of the first end conductive ring section of each conducting ring in Upper conductive layer and/or the same position of the second end conductive ring section and intermediate conductive layer carries out being electrically connected to form coil; The conducting ring of the conducting ring in Upper conductive layer and the same position of intermediate conductive layer by pair of cross cross-bridges or conductive hole to together with being connected to each other, but described 2 conducting rings have identical shape size can be identical or not identical.
But 3 conducting ring sections of the relevant position of second group of 3 conducting ring sections of second of conducting ring 12 group and conducting ring 18 are placed face-to-face; In an identical manner, 3 conducting ring sections of 3 conducting ring sections of second group of conducting ring 13 and the relevant position of second group of conducting ring 19 are placed face-to-face; 3 conducting ring sections of 3 conducting ring sections of second group of conducting ring 14 and the relevant position of second group of conducting ring 20 are placed face-to-face; 3 conducting ring sections of 3 conducting ring sections of second group of conducting ring 15 and the relevant position of second group of conducting ring 21 are placed face-to-face; 3 conducting ring sections of 3 conducting ring sections of second group of conducting ring 16 and the relevant position of second group of conducting ring 21 are placed face-to-face; 3 conducting ring sections of conducting ring 16 and 3 conducting ring sections of conducting ring 22 are placed face-to-face; 3 conducting ring sections of last conducting ring 17 and 3 conducting ring sections of conducting ring 23 are placed face-to-face.
Wherein, the conducting ring 12,13 of Upper conductive layer, 14, the geometric center O1 of 15,16,17 and the conducting ring 18 of intermediate conductive layer, 19,20,21,22, the geometric center O2 of 23 does not overlap, and namely the conducting ring of intermediate conductive layer does not overlap in the geometric center of the geometric center of the orthographic projection of Upper conductive layer and the conducting ring of Upper conductive layer).Obviously, the conducting ring 12,13 of Upper conductive layer, 14, the geometric center O1 of conducting ring section of 15,16,17 and the conducting ring 18 of intermediate conductive layer, 19,20,21,22, the geometric center O2 of the conducting ring section of 23 does not overlap, and namely the conducting ring section of the conducting ring of intermediate conductive layer does not overlap in the geometric center of the conducting ring section of the geometric center of the orthographic projection of Upper conductive layer and the conducting ring of Upper conductive layer).
First end electrode is connected with the first end-rings section of described external conductive ring, and the second termination electrode is connected with the second end-rings section of described inner conductive ring.External conductive ring can be the most external conducting ring of one deck conductive layer, and inner conductive ring can be the penetralia conducting ring of its adjacent conductive layer, and described external conductive ring can be included in different conductive layers from inner conductive ring.
In the coil shown in Fig. 1, the first end conductive ring section of the most external conducting ring 12 of Upper conductive layer is connected with first end electrode 10.In order to reduce the series impedance of the first end conductive ring section of external conductive ring further, the utility model can comprise an independent conducting ring section 25, and it is placed in intermediate conductive layer, adjacent with the most external conducting ring of intermediate conductive layer.Independent conducting ring section 25 is parallel with the first end conductive ring section of the most external conducting ring 12 of Upper conductive layer, and by intersecting cross-bridges or conductive hole pair and its electrical connection.
Inner conductive ring 23 is positioned at intermediate conductive layer, and the second end conductive ring section 28 of inner conductive ring is connected with the second termination electrode 11 by conducting bridge.Optionally, conducting bridge can be positioned at Upper conductive layer, any one deck in intermediate conductive layer or underlying conductive layer.
Further, electric current flows into from from first end electrode, and electric current flows through the external conductive ring 12 of Upper conductive layer, by 2 to conduction cross-bridges 26, arrives the external conductive ring 18 of intermediate conductive layer; By 2 to conduction cross-bridges 27, arrive the conducting ring 13 of Upper conductive layer; By 2 to conduction cross-bridges, electric current arrives the conducting ring 19 of intermediate conductive layer; By 2 to conduction cross-bridges, arrive the conducting ring 14 of Upper conductive layer; By 2 to conduction cross-bridges, electric current flows through the conducting ring 20 of intermediate conductive layer; By 2 to conduction cross-bridges, flow to the conducting ring 15 of Upper conductive layer; By 2 to conduction cross-bridges, electric current flows through the conducting ring 21 of intermediate conductive layer; By 2 to conduction cross-bridges, flow to the conducting ring 16 of Upper conductive layer; By 2 to conduction cross-bridges, electric current flows through the conducting ring 22 of intermediate conductive layer; By 2 to conduction cross-bridges, flow to the conducting ring 17 of Upper conductive layer; By 2 groups of conduction cross-bridges, electric current flows through the conducting ring 23 of intermediate conductive layer; Last electric current flows out the second termination electrode 11 being positioned at intermediate conductive layer by conducting bridge.This coil can be used to prepare inductance element and other similar components and parts, and this coil also can be applied directly in circuit or on pcb board.
In this embodiment, the width of conduction cross-bridges can not exceed the width of the end conductive ring section in conducting ring.
Embodiment 2
As shown in Figure 3, inductance coil haves three layers conductive layer, is Upper conductive layer, intermediate conductive layer and underlying conductive layer; Upper conductive layer has 2 conducting rings 33,34, but the identical size of these 2 conducting ring shapes is different, and arrangement is neat; Intermediate conductive layer has 2 conducting rings 35,36, but the identical size of the shape of these 2 conducting rings is different, marshalling; All conducting rings of this coil are spiral conducting ring, and for convenience, spiral conducting ring is called conducting ring.This coil also comprises a conducting bridge, and this conducting bridge is configured to the inner conductive ring of middle level conducting bridge to be connected with the second termination electrode.Optionally, this conducting bridge can be placed in Upper conductive layer or intermediate conductive layer, and optionally, this conducting bridge also can be placed in independent underlying conductive layer, and this underlying conductive layer only comprises a conducting bridge, does not comprise conducting ring.Conducting ring is square; Inductance coil has 4 circles; Distance between adjacent conductive ring in each conductive layer is equal.
The conducting ring of coil shown in Fig. 2 can be that shown in first spiral conducting ring in Fig. 8, each spiral conducting ring can be divided into 5 conducting ring sections; First end conductive ring section parallels with the second end conductive ring section; Certain distance is had between first and second end conductive ring sections; These 5 conducting ring sections can be divided into 2 groups; First group comprises 2 end conductive ring sections, and the first end conductive ring section is identical with the width of last end conductive ring section comprises 2 conducting ring sections, and second group comprises remaining 3 middle conducting ring sections, and the width of these 3 conducting ring sections is identical; The width of first group of conducting ring section is less than the width of second group of conducting ring section.
First end conductive ring section of the conducting ring 33 in Upper conductive layer and/or the second end conductive ring section are electrically connected with the first end conductive ring section of the conducting ring 35 of a kind of neat mode and intermediate conductive layer and/or the second end conductive ring section being used to by intersecting cross-bridges or conductive hole, and the first end conductive ring section of the conducting ring 34 in Upper conductive layer and/or the second end conductive ring section are electrically connected to form conductive coil with the first end conductive ring section of the conducting ring 36 of a kind of neat mode and intermediate conductive layer and/or the second end conductive ring section to being used to by intersecting cross-bridges or conductive hole.But the conducting ring of each conductive layer kind has identical shape is of different sizes.
In the middle of second group of conducting ring 33 3, conducting ring sections are placed face-to-face with 3 the centre conducting ring sections being positioned at same position of second group of conducting ring 35; Further, in an identical manner, 3 middle conducting ring sections of second group of conducting ring 34 and 3 the conducting ring sections being positioned at same position of second group of conducting ring 36 are placed face-to-face.
Wherein, the geometric center O2 of the conducting ring section of the conducting ring of Upper conductive layer or the geometric center O1 of conducting ring section of conducting ring and the conducting ring of intermediate conductive layer or conducting ring does not overlap (namely the conducting ring of intermediate conductive layer or the geometric center of the geometric center of its orthographic projection of conducting ring section on Upper conductive layer and the conducting ring of Upper conductive layer or its conducting ring section do not overlap).
First end conductive ring section of the external conductive ring 33 of Upper conductive layer is connected to first end electrode 30.For reducing the series resistance of the first end conductive ring section in external conductive ring, an independent conducting ring section 30 is had to be placed in intermediate conductive layer, it is parallel with the first end conductive ring section of the most external conducting ring 33 of Upper conductive layer, and is connected with the first end conductive ring intersegmental part of external conductive electricity ring 33 by intersection cross-bridges or conductive hole pair.
Second end conductive ring section of inner conductive ring 36 is positioned at intermediate conductive layer, and is connected by the conducting bridge in underlying conductive layer with the second termination electrode 31.Optionally, this conducting bridge also can be included in Upper conductive layer or intermediate conductive layer, and therefore this coil has two conductive layers can complete all functions of coil.
In this coil, electric current, from first end electrode stream to the first end conductive ring section 32 of the external conductive ring 33 of upper strata conductive layer, arrives the conducting ring 35 of intermediate conductive layer to conduction cross-bridges 38 by two; By two, conduction cross-bridges 39 is arrived to the conducting ring 34 of Upper conductive layer again, flow through one group of conduction cross-bridges 40, arrive the conducting ring 36 of intermediate conductive layer, then flow through the conducting bridge of underlying conductive layer, finally flow out the second termination electrode 31.This coil can be used for preparing inductance element or other relevant components and parts.
Embodiment 3
As shown in Figure 7, inductance element (inductance coil) is made up of 2 coils described in the utility model, is respectively the coil on the left side, the coil composition on the right.Wherein the coil on the left side is rotated counterclockwise 90 °, the coil on the right turns clockwise 90 °, make the geometric center of one of them coil have a displacement left, the geometric center of another one coil moves right, and such two coils can connect in a serial fashion.Wherein each coil comprises 3 layers of conductive layer respectively: upper strata, middle level and lower floor.Coil herein all has identical or approximate topological diagram design and the electric property of coil described in the utility model embodiment 2.But due to the rotation of coil, electric current is the flowing in clockwise direction in the coil on the left side shown in Fig. 7, and electric current in the coil on the right shown in Fig. 7 in counterclockwise flowing.That is, the magnetic field that the coil on the left side is formed is positive flux field, and the magnetic field that the coil on the right is formed is negative fluxfield.
Therefore, two equal positive pole couplings of coil, total inductance value of inductance coil is improved; In addition, can reduce when inductance element coil is near other inductance components or avoids mutual coupling.Finally, three-end electrode can be connected with the intermediate point of inductance conductive traces.A centre cap can be formed like this in the centre of two coils.
It should be noted that based on above embodiment, it should be appreciated by those skilled in the art that the above embodiments only list, but not to restriction of the present utility model.In fact the conduction number of plies that the coil described in the utility model comprises should not be confined to 2 layers, 3 layers, also can be 4 layers, the multilayers such as 5 layers, the conduction number of plies can be selected according to actual conditions, such as: one deck conductive layer of coil has N number of conducting ring, its adjacent conductive layer can comprise N number of or N-1 or N+1 conducting ring.
In fact, the shape of conducting ring is perhaps other shapes, such as, shown in Fig. 8; The sum of conducting ring should not be limited as 4 or 12 in addition, and other quantity are also fine as 6 or 14, can carry out selecting suitable quantity according to practical situations.Obviously, the Upper conductive layer described in embodiment, intermediate conductive layer, underlying conductive layer can be expressed as the first conductive layer, the second conductive layer, the 3rd conductive layer, and the difference of expression form is not to restriction of the present utility model.
In order to understand better, the coil discussed in embodiment, its parameter is identical, and the conducting ring thickness of such as adjacent conductive layer is identical, and the spacing of the adjacent conductive ring between same conductive layer is identical, and the width of the conducting ring section of conducting ring is identical.But in reality is implemented, for improving from frequency or Q value, these parameters may be different.Coil may have multiple conductive layer, may be the plurality of conductive layers such as 4 layers or 5 layers.Such as this coil can be made up of multiple conducting ring, and wherein each conducting ring has different width.
As seen from the above-described embodiment, the utility model, for the preparation of the coil of inductance element, has following advantage:
I. coil contains plurality of conductive layers, and have 2 conductive layers at least respectively containing at least 1 spiral conducting ring, spiral conducting ring proper alignment, each spiral conducting ring internal electric connects to form a coil.This coil also comprises conducting bridge further, and conducting bridge can be placed on and comprise in arbitrary conductive layer of conducting bridge, also can be included in independent conductive layer.Therefore larger than the inductance coil of single conductive layer more than 2 times of the resistance value of this inductance coil.
Ii. the electric current because being flowed into by first end electrode alternately flows through at ground floor conductive layer and second layer conductive layer.Therefore the differential voltage between the conducting ring section of the conducting ring of ground floor conductive layer and the corresponding conducting ring section of the corresponding conducting ring of second layer conductive layer is reduced to a minimum value.Therefore the parasitic coupling capacitance value between first end electrode and the second termination electrode reduces to some extent relative to current technique, and performance promotes to some extent.
Utilize above-mentioned each coil to prepare inductance element, multiple described coils connected in series can be connected to form inductance element.Also described coil or described inductance element directly can be applied in circuit, to reduce chip area, reduce coupling capacitance, and reduce the interference that in circuit, each inductance element is mutual.
Semiconductor technology can be adopted to form described coil on a semiconductor substrate, between each layer, dielectric material is set, and between the conducting ring of every one deck filled media material so that the mutual electrical isolation of each conducting ring; Also can adopt PCB technology on pcb board, form the conductive layer of each coil, each conducting ring is mutually isolated by dielectric material.When described substrate is semiconductor base, each conducting ring forms coil by pair of cross cross-bridges to being electrically connected; When described substrate is printed circuit board (PCB) (PCB), each conducting ring forms coil by pair of conductive hole to being electrically connected.
Therefore based on above embodiment, it should be appreciated by those skilled in the art that the above embodiments only list, but not to restriction of the present utility model.In fact, the coil of above-mentioned feature is had all to belong to category of the present utility model.Any understanding being familiar with this technology all without prejudice under spirit of the present utility model and category, can be modified above-described embodiment or changes.Therefore, all that complete under spirit that the utility model discloses and technological thought are equivalent modifies or changes not departing from such as to have usually just this in art, must be contained by claim of the present utility model.
In sum, inductance coil for the preparation of inductance element provided by the utility model has plurality of conductive layers, have 2 conductive layers at least respectively containing at least 1 conducting ring, conducting ring arranges in neat mode, conducting ring between each layer by intersect cross-bridges or conductive hole to come and the conducting ring of other layers interconnected, each conducting ring is all electrically connected to form coil.Coil is at least containing 2 termination electrodes, and at least one termination electrode is connected with external conductive ring, and at least one termination electrode is connected with inner conductive ring; At least the geometric center of the conducting ring of one deck conductive layer and the geometric center of its adjacent conductive layer do not overlap; And at least one or two end conductive ring sections of one deck conductive layer are used to or two end conductive ring sections of the conducting ring connecting its adjacent conductive layer; Described conducting ring can be spiral conducting ring, and the width of spiral conducting ring is also incomplete same.
For accurate understanding the utility model, as Fig. 5, shown in 6, advantage of the present utility model can be set forth by the analysis of the parasitic coupling capacitance to conducting ring.The electric current introduced by Fig. 9 is theoretical, also can set forth advantage of the present utility model.
As shown in Figure 9,2 ideal wires are had to be placed (in order to sake of clarity, being illustrated in the form of flat sheets by wire) face-to-face, described wire is mutually isolated by dielectric material, and described dielectric thickness is s, and dielectric layer constant is ε, and the length of every root line is L/2, width is W.Under ideal case, the distribution of resistance of wire is balanced, and the pressure reduction along wire is also even variation.The pressure reduction of the left end of two wires is 1V, and the pressure reduction of two wire right-hand members is 0V, then can be expressed as at the function of differential voltage and position x between the some x of x-axis optional position:
And then length to be the electric capacity of two sections of dx be:
And then the electric energy of this wire institute energy storage can be expressed as:
Or be:
So, described equivalent capacity can be expressed as:
Wherein, C
0for when conductor wire right-hand member is opened a way two conductor wires and the capacitance of electric capacity:
Based on described above, suppose the inductance coil gone out as shown in Figure 3 and Figure 5, case of internal conducting ring and external conductive ring have identical length.When adding the voltage of 1V to inductance coil, the differential voltage between the external conductive ring of Upper conductive layer and the external conductive ring of intermediate conductive layer is be fixing, is worth for 0.235V.Analogously, the inner conductive ring in Upper conductive layer and the differential voltage value between the inner conductive ring in intermediate conductive layer are also fixing, are worth for 0.235V.
Store in described inductor coil, and the electric energy relating to two adjacent layers can approximate to be expressed as (by be formed in the ring of embedding sleeve-like structure the electric energy that stores do not consider, because separating distance may change):
Wherein, N is the conducting ring quantity of proper alignment, and the coil as shown in the utility model Fig. 3 has 4 conducting rings.W is the width of conducting ring, and L is the length of the coil scattered, and s is the spacing of the external conductive ring of Upper conductive layer and the external conductive ring of intermediate conductive layer, namely the distance of the interior conducting ring of Upper conductive layer and the interior conducting ring of lower floor.Thus, equivalent capacity is approximately:
| C EQ～0.041·C f2f | (9) |
Suppose that this coil is for shown in Fig. 4 and Fig. 6 of background technology.When adding the voltage of 1V to coil, the differential voltage of the external conductive ring of Upper conductive layer and the external conductive ring of intermediate conductive layer is 0.8V ~ 0.533V, inner conductive ring in Upper conductive layer and the differential voltage value between the inner conductive ring in intermediate conductive layer are also fixing, are worth for 0.266V.
The electric energy that this coil stores can be expressed as:
So described equivalent capacity can be expressed as:
| C EQ～0.302·C f2f | (11) |
Compare with prior art coil as shown in Figure 6, the coupling capacitance of coil described in the utility model obviously reduces, self-resonant frequency f
sRsignificantly improve, effectively improve the performance of coil, shown in being expressed as follows:
Wherein, L
sthe inductance value of inductor coil, and C
pfor including aspectant conducting ring and being positioned at the total capacitance of adjacent conductive ring of same layer.Therefore Q value significantly improves.
Obviously, equivalent capacity can increase along with the increase of conducting ring, and in embodiment of the present utility model, the conducting ring section of coil and the relation of coil turn can be expressed as:
| N sections＝4·N+1 | (14) |
Differential voltage in two adjacent conductive layers between adjacent windings and the relation of coil turn can be expressed as:
We can find that the differential voltage of the adjacent windings number of turn can reduce along with the raising of the number of turn of coil, and the electric energy that inductance coil stores can be expressed as:
Finally, coupling capacitance can reduce further:
Coil as shown in prior art Fig. 6, the number of conducting ring section can be expressed as:
| N sections＝4·N-1 | (18) |
Therefore the electric energy that inductance coil stores can be expressed as:
Equivalent capacity can be expressed as:
At the coil shown in embodiment Fig. 3 of the present utility model and Fig. 5, the parasitic coupling capacitance of the conducting ring of Upper conductive layer and the conducting ring of intermediate conductive layer reduces further than the coil shown in prior art Fig. 4 and Fig. 6.Along with the raising of coil turn, parasitic coupling capacitance increases, and approaches a fixed value gradually.
Therefore, the utility model comparatively prior art is compared, and has larger industrial application value.
In sum, above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any understanding being familiar with this technology all can without prejudice under spirit of the present utility model and category, above-described embodiment is modified or changes, therefore, such as this modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses to have usual knowledge in art, must be contained by claim of the present utility model.
Claims (17)
1. a coil, is characterized in that, described coil at least comprises:
Plurality of conductive layers, wherein has at least two conductive layers respectively to comprise at least one conducting ring; Described conducting ring is all electrically connected to form coil; The first end electrode of described coil is connected with external conductive ring, and the second termination electrode is connected with inner conductive ring; And have the geometric center spatially misalignment mutually of the conducting ring of the geometric center of the conducting ring of one deck conductive layer and its last layer and/or lower one deck conductive layer at least.
2. coil according to claim 1, is characterized in that, described coil comprises two conductive layers, and wherein every layer of conductive layer comprises at least one conducting ring; And each conducting ring is all electrically connected to form coil; The first end electrode of described coil is connected with the external conductive ring of ground floor conductive layer, and the second termination electrode of described coil is connected with the inner conductive ring of second layer conductive layer; And ground floor conductive layer the geometric center of conducting ring and the geometric center spatially mutually misalignment of the conducting ring of the second layer.
3. coil according to claim 1, is characterized in that, wherein has at least one deck conductive layer to comprise conducting bridge, and conducting bridge is configured to inner conductive ring to be connected with the second termination electrode.
4. coil according to claim 2, it comprises further: third layer conductive layer, and wherein third layer conductive layer comprises a conducting bridge, and this conducting bridge is configured to the inner conductive ring of second layer conductive layer to be connected with the second termination electrode.
5. coil according to claim 2, is characterized in that, ground floor conductive layer or second layer conductive layer comprise a conducting bridge further, and this conducting bridge is configured to the inner conductive ring of second layer conductive layer to be connected with the second termination electrode.
6. coil according to claim 3, it is characterized in that, conducting ring is divided into multiple conducting ring section, and wherein the first end conductive ring section and the second end conductive ring section form first group of conducting ring section, the first end conductive ring section of described conducting ring and the placement parallel to each other of the second end conductive ring section; Other remaining adapter ring sections form second group of conducting ring section, and first group of wherein said conducting ring section has the first width, and the conducting ring section of second group has the second width, and wherein the first width is less than the second width.
7. coil according to claim 6, is characterized in that, the shape of described conducting ring can be class square, and mixing square is oval, octagon, circle, one or more in closed curve.
8. coil according to claim 7, it is characterized in that, wherein one deck conductive layer comprises an independent conducting ring section further, the parallel placement of the first end-rings section of this conducting ring section and external conductive ring, and by intersect cross-bridges or conductive hole interconnected to realizing.
9. coil according to claim 8, it is characterized in that, the first end-rings section of described conducting ring and/or the second end-rings section realize interconnected by intersecting the first end-rings section of conducting ring of cross-bridges or conductive hole pair and other conductive layers and/or the second end-rings section.
10. coil according to claim 3, is characterized in that, the conducting ring section that second group of conducting ring section of each conducting ring in one deck conductive layer is adjacent the same position of second group of the conducting ring of the same position of layer is placed one by one face-to-face.
11. coils according to claim 3, is characterized in that, first end electrode is connected with the first end-rings section of described external conductive ring, and the second termination electrode is connected with the second end-rings section of described inner conductive ring.
12. coils according to claim 1, is characterized in that, one deck conductive layer has N number of conducting ring, and its adjacent conductive layer comprises N number of or N-1 or N+1 conducting ring.
13. coils according to claim 12, is characterized in that, described coil is made up of spiral conducting ring, and the width of the spiral conducting ring in same layer is also incomplete same.
14. coils according to claim 12, it is characterized in that, described external conductive ring can be the most external conducting ring of one deck conductive layer, inner conductive ring can be the penetralia conducting ring of its adjacent conductive layer, and described external conductive ring can be included in different conductive layers from inner conductive ring.
15. coils as described in any one of claim 1-14, it is characterized in that, each conductive layer can be prepared on semiconductor base or printed circuit board (PCB).
16. 1 kinds of inductance elements, is characterized in that, comprise the coil described in multiple any one of 1-14, and wherein each coil carries out being connected in series to form inductance element.
17. 1 kinds of circuit, is characterized in that, comprise at least one inductance element as claimed in claim 16 and/or at least one coil as claimed in claim 1.
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| CN201520714783.XU CN205104335U (en) | 2015-09-15 | 2015-09-15 | Coil and with inductance element and circuit of its preparation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105895332A (en) * | 2016-04-01 | 2016-08-24 | 臻绚电子科技(上海)有限公司 | Coil, induction device and method for preparing coil applied to induction device |
| CN106531410A (en) * | 2015-09-15 | 2017-03-22 | 臻绚电子科技(上海)有限公司 | Coil, inductance component and method for fabricating coil applied to inductance component |
| CN108075239A (en) * | 2016-11-16 | 2018-05-25 | 三星电子株式会社 | Wireless device with shared coil |
| CN109545502A (en) * | 2017-09-22 | 2019-03-29 | 株式会社村田制作所 | Electronic component |
| CN110291600A (en) * | 2016-10-04 | 2019-09-27 | 纳亨利公司 | Midget inductor and circuit device therewith and its manufacturing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531410A (en) * | 2015-09-15 | 2017-03-22 | 臻绚电子科技(上海)有限公司 | Coil, inductance component and method for fabricating coil applied to inductance component |
| CN105895332A (en) * | 2016-04-01 | 2016-08-24 | 臻绚电子科技(上海)有限公司 | Coil, induction device and method for preparing coil applied to induction device |
| CN110291600A (en) * | 2016-10-04 | 2019-09-27 | 纳亨利公司 | Midget inductor and circuit device therewith and its manufacturing method |
| US11501908B2 (en) | 2016-10-04 | 2022-11-15 | Nanohenry, Inc. | Miniature inductors and related circuit components and methods of making same |
| US11990266B2 (en) | 2016-10-04 | 2024-05-21 | Nanohenry, Inc. | Miniature transmission lines and related circuit components |
| CN108075239A (en) * | 2016-11-16 | 2018-05-25 | 三星电子株式会社 | Wireless device with shared coil |
| CN108075239B (en) * | 2016-11-16 | 2021-10-01 | 三星电子株式会社 | Wireless device with shared coil |
| CN109545502A (en) * | 2017-09-22 | 2019-03-29 | 株式会社村田制作所 | Electronic component |
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