CN116168934A

CN116168934A - Inductive device

Info

Publication number: CN116168934A
Application number: CN202111411620.0A
Authority: CN
Inventors: 颜孝璁
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2023-05-26

Abstract

The present disclosure provides an inductance device, which includes a plurality of coils, a first central connection portion and a plurality of side connection portions. The coils comprise a first winding and a second winding. The first winding includes a plurality of first coils. The second winding includes a plurality of second coils. The first central connection portion is used for coupling the first coils and the second coils which are alternately arranged, so that a first one of the second coils is coupled with a second one of the second coils. The side connection parts are respectively arranged at two sides of the first central connection part and are respectively used for coupling a second of the second coils with a third of the second coils, so that the second of the second coils and the first of the first coils form one of the coils of the inductance device.

Description

Inductance device

Technical Field

The present disclosure relates to electronic devices, and more particularly, to an inductance device.

Background

The existing inductors of various forms have advantages and disadvantages. The inductor with the alternately arranged coil structure has larger parasitic capacitance and higher inductance, resulting in lower self-resonant frequency (self-resonance frequency) and lower quality factor (quality factor). Therefore, the application range of the inductor is limited.

Disclosure of Invention

One embodiment of the present disclosure is an inductive device. The inductance device comprises a plurality of coils, a first central connecting part and a plurality of side connecting parts. The coils comprise a first winding and a second winding. The first winding includes a plurality of first coils. The second winding includes a plurality of second coils. The first central connection portion is used for coupling the first coils and the second coils which are alternately arranged, so that a first one of the second coils is coupled with a second one of the second coils. The side connection parts are respectively arranged at two sides of the first central connection part and are respectively used for coupling a second of the second coils with a third of the second coils, so that the second of the second coils and the first of the first coils form one of the coils of the inductance device. Wherein a second one of the second coils is disposed next to a third one of the second coils.

In summary, the inductance device of the present disclosure has the advantage of reducing the equivalent parasitic capacitance value through the plurality of side connection portions configured at two sides of the first central connection portion. In addition, through the architecture of the disclosure, the inductance device can also improve the equivalent inductance value and the quality factor.

Drawings

Fig. 1 is a schematic structural diagram of an inductive device according to some embodiments of the present disclosure.

Fig. 2 is a schematic structural diagram of an inductive device according to some embodiments of the present disclosure.

Fig. 3 is a schematic structural diagram of an inductive device according to some embodiments of the present disclosure.

Fig. 4 is a schematic structural diagram of an inductive device according to some embodiments of the present disclosure.

Symbol description

100. 200, 300, 400: inductance device

101. 102, 103, 104, 201, 202, 301, 302: connecting piece

C1: first winding

C2: second winding

FC 1-FC 3: first coil

SC 1-SC 2: second coil

FC3-1a, FC3-1b, FC2-1a, FC2-1b: first part

FC3-2, FC2-2: second part

SC1-1a, SC1-1b, SC2-1a, SC2-1b: third part

SC1-2, SC2-2: fourth part

CN1: first central connection part

CN2: second central connection part

PN1, PN2, PN3, PN4: side edge connecting part

S1: first side

S2: second side

S3: third side

S4: fourth side

IOE1: a first input/output terminal

IOE1: a second input/output terminal

Detailed Description

The following detailed description of the embodiments is provided in conjunction with the accompanying drawings, but the specific embodiments described are merely illustrative of the disclosure and not intended to limit the disclosure, and the description of the structure operations is not intended to limit the order in which the operations may be performed, and any arrangement of elements that may be rearranged to produce a result with equivalent technical results is within the scope of the disclosure.

The term "about" as used throughout the specification and claims, unless otherwise indicated, shall generally have the ordinary meaning of each term used in this field, in the disclosure herein, and in the special context.

As used herein, "coupled" or "connected" may mean that two or more elements are in direct physical or electrical contact with each other, or in indirect physical or electrical contact with each other, and may also mean that two or more elements are in operation or action with each other.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an inductance device 100 according to some embodiments of the present disclosure. In some embodiments, the inductance device 100 includes a plurality of coils in the same metal layer, and the plurality of coils of the inductance device 100 are composed of a first winding C1 and a second winding C2. As shown in fig. 1, the inductance device 100 further includes a first central connection portion CN1, a second central connection portion CN2, a plurality of side connection portions PN 1-PN 2, a first input/output terminal IOE1 and a second input/output terminal IOE2.

In the embodiment shown in fig. 1, the first winding C1 is configured with a plurality of first coils FC 1-FC 3 (shown as a dot-shaped grid in fig. 1) from outside to inside, wherein the first coil FC3 of the first winding C1 is composed of a plurality of first portions FC3-1a and FC3-1b and a second portion FC3-2. The second winding C2 is also configured with a plurality of second coils SC 1-SC 2 (shown in diagonal grid in fig. 1) from outside to inside, wherein the second coil SC2 of the second winding C2 is composed of a plurality of third portions SC2-1a and SC2-1b and a fourth portion SC2-2. It is understood that the first winding C1 and the second winding C2 do not overlap each other.

In some embodiments, the first input/output terminal IOE1 and the second input/output terminal IOE2 are used for inputting or outputting signals. Specifically, the first input/output end IOE1 is coupled to the first coil FC1 located at the outermost ring at a first side S1 of the inductor device 100, and the second input/output end IOE2 is coupled to the second coil SC1 located at the outermost ring at a second side S2 of the inductor device 100. As shown in fig. 1, the first side S1 (e.g., upper side) and the second side S2 (e.g., lower side) are opposite sides.

In some embodiments, the first central connection portion CN1 is located on the first side S1 of the inductance device 100, and the second central connection portion CN2 is located on the second side S2 of the inductance device 100. The plurality of side connection portions PN1 to PN2 are provided on both sides of the first central connection portion CN1, respectively. For example, the side connection portion PN1 is disposed at the left side of the first central connection portion CN1, and the side connection portion PN2 is disposed at the right side of the first central connection portion CN 1. The following paragraphs will describe the structures of the first central connection portion CN1, the second central connection portion CN2, and the plurality of side connection portions PN1 to PN2, respectively.

In some embodiments, the first central connection portion CN1 is configured to couple the plurality of first coils FC 2-FC 3 and the plurality of second coils SC 1-SC 2 that are alternately arranged, and the first central connection portion CN1 includes a first interleaved portion and a second interleaved portion. As shown in fig. 1, the first interleaved portion and the second interleaved portion do not completely overlap. The first interleaved part includes a plurality of

connectors

101 and 102 and is used to couple the first coil FC2 (i.e., the first coil located in the middle coil) with the first coil FC3 (i.e., the first coil located in the innermost coil). The second interlacing portion includes a plurality of connectors 103 and 104, and is configured to couple the second coil SC1 (i.e., the second coil located at the outermost ring) and the second coil SC2 (i.e., the second coil located at the innermost ring). Specifically, the connection element 101 is located on a first metal layer. The connecting elements 102 are located on a second metal layer and are staggered with the connecting elements 101. The connecting members 103 are located on the first metal layer, do not overlap with the connecting members 101, and are staggered with the connecting members 102. The connecting member 104 is located on the second metal layer, does not overlap with the connecting member 102, and is staggered with the plurality of connecting

members

101 and 103.

In some embodiments, the plurality of side connection portions PN 1-PN 2 are respectively used for coupling the first coil and the second coil (e.g., the first coil FC3 at the innermost ring and the second coil SC2 at the innermost ring) adjacent to each other. As shown in fig. 1, each of the plurality of side connection portions PN1 to PN2 includes a plurality of connection pieces 301 to 302. Specifically, the connection 301 is located in the first metal layer. The connecting members 302 are located on the second metal layer and are staggered with the connecting members 301.

In some embodiments, the second central connection portion CN2 includes a third staggered portion. As shown in fig. 1, the third staggered portion includes a plurality of connecting

members

201 and 202, and is configured to couple the first coil FC1 located at the outermost ring and the first coil FC2 located at the middle ring. Specifically, the connection 201 is located in the first metal layer. The connecting pieces 202 are located on the second metal layer and are staggered with the connecting pieces 201.

In the embodiment of fig. 1, the first coils FC1 to FC3 and the second coils SC1 to SC2 are also located in the first metal layer, but the disclosure is not limited thereto. In some embodiments, the plurality of first coils FC 1-FC 3 and the plurality of second coils SC 1-SC 2 are located in the second metal layer.

In some embodiments, the first metal layer is different from the second metal layer. For example, the first metal layer is an ultra-thick metal (UTM) layer, and the second metal layer is an aluminum redistribution layer (AL-RDL). It should be understood that the present disclosure is not so limited.

Referring again to fig. 1, the structure of the first winding C1 is first described. In detail, the left half coil of the first coil FC1 is coupled to the first input/output end IOE1 at the first side S1, and is wound around the second side S2 in the counterclockwise direction from the first side S1, and is coupled to one end of the connecting member 202 at the second side S2 through a via (via). The other end of the connecting member 202 is also coupled to the right half coil of the first coil FC2 through the via hole.

The right half coil of the first coil FC2 is wound from the second side S2 to the first side S1 in the counterclockwise direction, and is directly coupled to one end of the connecting member 101 at the first side S1. The other end of the connecting member 101 is also directly coupled to one end of the first portion FC3-1a of the first coil FC 3. The other end of the first portion FC3-1a of the first coil FC3 is coupled to one end of the connecting piece 302 of the side connecting portion PN1 through a via hole, and the other end of the connecting piece 302 of the side connecting portion PN1 is also coupled to the second portion FC3-2 of the first coil FC3 through a via hole. In other words, a first one of the plurality of first coils (e.g., the right half coil of the first coil FC 2) is coupled to a second one of the plurality of first coils (e.g., the first portion FC3-1a of the first coil FC 3) via the first central connection CN1, and the second one of the plurality of first coils is coupled to a third one of the plurality of first coils (e.g., the second portion FC3-2 of the first coil FC 3) via the side connection PN 1.

The second portion FC3-2 of the first coil FC3 is wound around the right side of the side connection portion PN2 from the left side of the side connection portion PN1 in the counterclockwise direction and is coupled to one end of the connecting piece 302 of the side connection portion PN2 through the via hole, and the other end of the connecting piece 302 of the side connection portion PN2 is also coupled to one end of the first portion FC3-1b of the first coil FC3 through the via hole. The other end of the first portion FC3-1b of the first coil FC3 is coupled to one end of the connecting member 102 through a via, and the other end of the connecting member 102 is also coupled to the left half coil of the first coil FC2 through a via. In other words, a first one of the plurality of first coils (e.g., the left half coil of the first coil FC 2) is coupled to a second one of the plurality of first coils (e.g., the first portion FC3-1b of the first coil FC 3) via the first central connection CN1, and the second one of the plurality of first coils is coupled to a third one of the plurality of first coils (e.g., the second portion FC3-2 of the first coil FC 3) via the side connection PN 2.

The left half coil of the first coil FC2 is wound from the first side S1 to the second side S2 in the counterclockwise direction, and is directly coupled to one end of the connecting member 201 at the second side S2. The other end of the connecting member 201 is also directly coupled to the right half coil of the first coil FC 1. Finally, the right half coil of the first coil FC1 is wound around the first side S1 in the counterclockwise direction from the second side S2, and is coupled to the first input/output terminal IOE1 at the first side S1.

As is apparent from the above description, the second one of the plurality of first coils (for example, the first portion FC3-1a or FC3-1b of the first coil FC 3) is disposed immediately adjacent to the third one of the plurality of first coils (for example, the second portion FC3-2 of the first coil FC 3) via the arrangement of the side connection portions PN1 and PN 2.

Next, the structure of the second winding C2 will be described. In detail, the right half coil of the second coil SC1 is coupled to the second input/output end IOE2 at the second side S2 through a connection member crossing the right half coil of the first coil FC1, and is wound around the first side S1 in the counterclockwise direction from the second side S2, and is directly coupled to one end of the connection member 103 at the first side S1. The other end of the connecting member 103 is also directly coupled to one end of the third portion SC2-1a of the second coil SC 2. The other end of the third portion SC2-1a of the second coil SC2 is directly coupled to one end of the connecting piece 301 of the side connecting portion PN 1. The other end of the connecting piece 301 of the side connecting portion PN1 is directly coupled to the fourth portion SC2-2 of the second coil SC 2. In other words, a first one of the plurality of second coils (e.g., the right half coil of the second coil SC 1) is coupled to a second one of the plurality of second coils (e.g., the third portion SC2-1a of the second coil SC 2) via the first central connection CN1, and the second one of the plurality of second coils is coupled to a third one of the plurality of second coils (e.g., the fourth portion SC2-2 of the second coil SC 2) via the side connection PN 1.

The fourth portion SC2-2 of the second coil SC2 is wound around the right side of the side connection portion PN2 from the left side of the side connection portion PN1 in the counterclockwise direction and is directly coupled to one end of the connecting piece 301 of the side connection portion PN2, and the other end of the connecting piece 301 of the side connection portion PN2 is also directly coupled to one end of the third portion SC2-1b of the second coil SC 2. The other end of the third portion SC2-1b of the second coil SC2 is coupled to one end of the connecting member 104 through the via hole, and the other end of the connecting member 104 is also coupled to the left half coil of the second coil SC1 through the via hole. In other words, a first one of the plurality of second coils (e.g., the left half coil of the second coil SC 1) is coupled to a second one of the plurality of second coils (e.g., the third portion SC2-1b of the second coil SC 2) via the first central connection CN1, and the second one of the plurality of second coils is coupled to a third one of the plurality of second coils (e.g., the fourth portion SC2-2 of the second coil SC 2) via the side connection PN 2.

Finally, the left half coil of the second coil SC1 is wound from the first side S1 to the second side S2 in the counterclockwise direction, and is coupled to the second input/output end IOE2 at the second side S2 through another connection crossing the left half coil of the first coil FC 1.

As is apparent from the above description, the second one of the plurality of second coils (for example, the third portion SC2-1a or SC2-1b of the second coil SC 2) is disposed immediately adjacent to the third one of the plurality of second coils (for example, the fourth portion SC2-2 of the second coil SC 2) via the arrangement of the side connection portions PN1 and PN 2.

As is apparent from the above description, the first coils FC1 to FC3 of the first winding C1 and the second coils SC1 to SC2 of the second winding C2 are distributed at different positions of the same metal layer through the arrangement of the first central connection portion CN1, the second central connection portion CN2 and the side connection portions PN1 to PN2, so as to form a plurality of turns of the inductance device 100. As shown in fig. 1, the inductance device 100 is configured with a first, a second, a third, a fourth, and a fifth turns in order from the outside to the inside.

Specifically, the inductor device 100 has a loop number of the side connection portions PN1 and PN2 formed by a combination of the first coil and the second coil. For example, the fourth turn of the inductance device 100 is composed of the second portion FC3-2 of the first coil FC3 and two third portions SC2-1a and SC2-1b of the second coil SC 2. The fifth turn of the inductive device 100 is made up of two first portions FC3-1a and FC3-1b of the first winding FC3 and a fourth portion SC2-2 of the second winding SC 2. In other words, one of the plurality of first coils (e.g., the first portion FC3-1a or the second portion FC 3-2) coupled to one side of the side connection PN1 (or PN 2) and one of the plurality of second coils (e.g., the fourth portion SC2-2 or the third portion SC2-1 a) coupled to the other side of the side connection PN1 (or PN 2) constitute one of the plurality of coils of the inductive device 100.

The turns of the inductor device 100, which are not provided with the side connection portions PN1 and PN2, are formed by the first coil or the second coil. For example, the first turn of the inductive device 100 consists of only the first coil FC1 of the first winding C1. The second winding of the inductive device 100 consists of only the second winding SC1 of the second winding C2. The third turn of the inductive device 100 consists of only the first winding FC2 of the first winding C1.

As is apparent from the above description, the plurality of first coils FC2 to FC3 and the plurality of second coils SC1 to SC2 coupled to both sides of the first central connection portion CN1 are symmetrically arranged. For example, the left half coil of the first coil FC1, the left half coil of the second coil SC1, the left half coil of the first coil FC2, the third portion SC2-1a on the left of the second coil SC2, and the first portion FC3-1a on the left of the first coil FC3 are sequentially arranged from outside to inside on the left of the first central connection portion CN 1. The right half coil of the first coil FC1, the right half coil of the second coil SC1, the right half coil of the first coil FC2, the third portion SC2-1b on the right of the second coil SC2, and the first portion FC3-1b on the right of the first coil FC3 are arranged in order from outside to inside on the right side of the first central connection portion CN 1.

In addition, the first coil and the second coil on both sides of the side connection portion PN1 are asymmetrically arranged. For example, on the left side of the side connection PN1, the first coil FC2, the second portion FC3-2 of the first coil FC3 and the fourth portion SC2-2 of the second coil SC2 are sequentially arranged from outside to inside (i.e., the second portion FC3-2 is arranged between the first coil FC2 and the fourth portion SC2-2 located in the middle coil). However, on the right side of the side connection portion PN1, the first coil FC2, the third portion SC2-1a on the left side of the second coil SC2 and the first portion FC3-1a on the left side of the first coil FC3 are sequentially arranged from outside to inside (i.e., the third portion SC2-1a is arranged between the first coil FC2 and the first portion FC3-1a located in the middle coil). It is understood that the first coil and the second coil coupled to both sides of the side connection portion PN2 are also asymmetrically arranged, and will not be described herein.

It is noted that, via the configuration of the left side connection portion PN1, the left half coil of the first coil FC2 is adjacent to the second portion FC3-2 of the first coil FC3 (i.e., the second coil is not provided between the left half coil of the first coil FC2 and the second portion FC3-2 of the first coil FC 3), but is not adjacent to the fourth portion SC2-2 of the second coil SC 2. Similarly, via the arrangement of the right side connection portion PN2, the right half coil of the first coil FC2 is adjacent to the second portion FC3-2 of the first coil FC3 (i.e., the second coil is not provided between the right half coil of the first coil FC2 and the second portion FC3-2 of the first coil FC 3), but is not adjacent to the fourth portion SC2-2 of the second coil SC 2. In this way, the equivalent inductance value and the quality factor (Q) of the inductor device 100 can be greatly improved, and the equivalent parasitic capacitance value of the inductor device 100 can be greatly reduced.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an inductance device 200 according to some embodiments of the present disclosure. The same reference numerals as in fig. 1 denote the same or similar parts in fig. 2, and a detailed description thereof will not be repeated. In the embodiment of fig. 2, the plurality of side connection portions PN3 to PN4 of the inductance device 200 are respectively coupled to the first coil FC2 located in the middle loop and the second coil SC1 located in the outermost loop. The first coil FC2 located in the middle ring is composed of a plurality of first parts FC2-1a and FC2-1b and a second part FC2-2, and the second coil SC1 located in the outermost ring is composed of a plurality of third parts SC1-1a and SC1-1b and a fourth part SC 1-2. The second turn of the inductive device 200 is made up of two first portions FC2-1a and FC2-1b of the first winding FC2 and a fourth portion SC1-2 of the second winding SC1. The third turn of the inductive device 200 is made up of the second portion FC2-2 of the first winding FC2 and the two third portions SC1-1a and SC1-1b of the second winding SC1. It is understood that the side connection PN3 or PN4 may be implemented by the side connection PN1 or PN2 of fig. 1, so that a description of the structure thereof is omitted herein.

In the embodiment of FIG. 2, a first one of the plurality of first coils (e.g., first coil FC 3) is coupled to a second one of the plurality of first coils (e.g., first portion FC2-1a or FC2-1b of first coil FC 2) via a first central connection CN1, and the second one of the plurality of first coils is coupled to a third one of the plurality of first coils (e.g., second portion FC2-2 to the left or right of first coil FC 2) via a side connection PN3 or PN 4. Similarly, a first one of the plurality of second coils (e.g., second coil SC 2) is coupled to a second one of the plurality of second coils (e.g., third portion SC1-1a or SC1-1b of second coil SC 1) via a first central connection CN1, and the second one of the plurality of second coils is coupled to a third one of the plurality of second coils (e.g., fourth portion SC1-2 to the left or right of second coil SC 1) via a side connection PN3 or PN 4.

Further, via the arrangement of the side connection portions PN3 and PN4, a second one of the plurality of first coils (for example, the first portion FC2-1a or FC2-1b of the first coil FC 2) is disposed immediately adjacent to a third one of the plurality of first coils (for example, the second portion FC2-2 to the left or right of the first coil FC 2). Similarly, a second one of the plurality of second coils (e.g., third portion SC1-1a or SC1-1b of second coil SC 1) is disposed immediately adjacent to a third one of the plurality of second coils (e.g., fourth portion SC1-2 to the left or right of second coil SC 1).

As also shown in fig. 2, the first coil FC3 is adjacent to the second portion FC2-2 on the left of the first coil FC2, but not to the fourth portion SC1-2 on the left of the second coil SC1, via the arrangement of the left-side connection portion PN 3. Similarly, the first coil FC3 is adjacent to the second portion FC2-2 on the right of the first coil FC2, but not to the fourth portion SC1-2 on the right of the second coil SC1, via the arrangement of the side connection PN4 on the right. In this way, the equivalent inductance value and the quality factor (Q) of the inductor device 200 can be greatly improved, and the equivalent parasitic capacitance value of the inductor device 200 can be greatly reduced.

In the foregoing embodiments, the inductor device (e.g., 100 in fig. 1 and 200 in fig. 2) has a square structure (i.e., a quadrilateral structure). It should be understood that in other embodiments, the inductance device may have other polygonal structures. Furthermore, it should be understood that the number of the plurality of coils of the inductive device is for example only, and the present disclosure is not limited to the number shown in fig. 1 and 2 (e.g., 5 turns). The embodiment shown in fig. 3 will be described below as an example.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an inductance device 300 according to some embodiments of the present disclosure. Specifically, the inductive device 300 is an octagonal structure and has at least 7 coils. The same reference numerals as in fig. 1 denote the same or similar parts in fig. 3, and a detailed description thereof will not be repeated.

In the foregoing embodiment, the plurality of side connection portions (e.g., PN 1-PN 2 in FIG. 1 or FIG. 3, PN 3-PN 4 in FIG. 2) and the first central connection portion CN1 are located at the first side S1 of the inductance device, but the disclosure is not limited thereto. In other embodiments, the plurality of side connection portions are located on the second side S2 of the inductance device 100, or on a third side S3 and a fourth side S4 of the inductance device 100, respectively. Specifically, the third side S3 (e.g., left side) and the fourth side S4 (e.g., right side) are opposite sides. The embodiment shown in fig. 4 will be described as an example.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating an inductance device 400 according to some embodiments of the present disclosure. Specifically, the plurality of side connection portions PN1 to PN2 are located on the third side S3 and the fourth side S4 of the inductance device 400, respectively. The same reference numerals as in fig. 1 denote the same or similar parts in fig. 4, and a detailed description thereof will not be repeated.

As can be seen from the embodiments of the present disclosure, the inductance device of the present disclosure has the advantage of reducing the equivalent parasitic capacitance value through the plurality of side connection portions disposed on both sides of the first central connection portion. In addition, through the architecture of the disclosure, the inductance device can also improve the equivalent inductance value and the quality factor.

While the present disclosure has been described with reference to the embodiments, it should be understood that the invention is not limited thereto, but may be variously modified and modified by those skilled in the art without departing from the spirit and scope of the present disclosure, and thus the scope of the present disclosure is defined by the appended claims.

Claims

1. An inductive device comprising:

Multiple coils, including:

a first winding comprising a plurality of first coils; and

A second winding, including a plurality of second coils;

A first central connection part is used to couple the first coils and the second coils arranged alternately, so that a first one of the second coils is coupled to a first coil of the second coils both; and

A plurality of side connecting parts are respectively arranged on both sides of the first central connecting part, and are respectively used to couple the second one of the second coils to a third one of the second coils , so that the second of the second coils and a first of the first coils constitute one of the coils of the inductive device;

Wherein, the second of the second coils is adjacent to the third of the second coils.

2. The inductive device according to claim 1, wherein each of the side connecting parts is also used to couple the first coil located in the innermost circle and the second coil located in the innermost circle;

Wherein the side connecting parts each include:

a first connecting piece for coupling a first part and a second part of the first coil located in the innermost circle; and

A second connecting piece is used to couple a third part and a fourth part of the second coil located in the innermost circle, wherein the first connecting piece and the second connecting piece are alternately arranged, and the first connecting piece part and the second connecting part are located on different layers;

Wherein the second part is arranged between the first coil located in the middle circle and the fourth part, and the third part is arranged between the first coil located in the middle circle and the first part.

3. The inductive device as claimed in claim 1, wherein each of the side connecting parts is used to couple the first coil located in the middle coil and the second coil located in the outermost coil;

Wherein the side connecting parts each include:

a first connector for coupling a first part and a second part of the first coil located in the middle coil; and

A second connecting piece is used to couple a third part and a fourth part of the second coil located in the outermost circle, wherein the first connecting piece and the second connecting piece are alternately arranged, and the first connecting piece part and the second connecting part are located on different layers;

Wherein the first part is arranged between the first coil located in the outermost circle and the third part, and the fourth part is arranged between the first coil located in the outermost circle and the second part.

4. The inductive device as claimed in claim 1, wherein the first central connection portion comprises:

a first intersecting portion for coupling the first coil located in the innermost coil and the first coil located in the middle coil; and

A second intersecting portion is used for coupling the second coil located on the outermost circle and the second coil located on the innermost circle, wherein the first intersecting portion and the second intersecting portion do not completely overlap.

5. The inductive device as claimed in claim 4, wherein the first intersecting portion comprises a first connecting piece, and the first connecting piece is used to couple the first coil located in the innermost circle and the first coil located in the middle circle first coil;

Wherein the first intersecting portion further includes a second connecting piece, and the second connecting piece is used to couple the first coil located in the innermost circle with the first coil located in the middle circle, wherein the second connecting piece is connected with the first coil located in the middle circle. The first connectors are arranged in a staggered manner, and the first connectors and the second connectors are located on different layers;

Wherein the second intersecting portion includes a third connecting piece, and the third connecting piece is used to couple the second coil located on the outermost circle with the second coil located on the innermost circle, wherein the third connecting piece is connected to the second coil located on the innermost circle. The second connectors are staggered, do not overlap with the first connectors, and are located on the same floor as the first connectors;

Wherein the second intersecting portion further includes a fourth connecting piece, and the fourth connecting piece is used to couple the second coil located in the outermost circle with the second coil located in the innermost circle, wherein the fourth connecting piece They are arranged alternately with the first connecting piece and the third connecting piece, do not overlap with the second connecting piece, and are located on the same floor as the second connecting piece.

6. The inductive device as claimed in claim 4, wherein the inductive device further comprises a second central connection, the first central connection is located on a first side of the inductive device, and the second central connection is located on the a second side of the inductive device, wherein the first side is different from the second side;

Wherein the second central connection portion includes a third intersecting portion, and the third intersecting portion is used for coupling the first coil at the outermost coil and the first coil at the middle coil.

7. The inductive device as claimed in claim 6, wherein the third intersecting portion comprises a first connecting member, and the first connecting member is used to couple the first coil located at the outermost coil and the coil located at the middle coil first coil;

Wherein the third intersecting portion further includes a second connecting piece, and the second connecting piece is used to couple the first coil located in the outermost circle with the first coil located in the middle circle, wherein the second connecting piece is connected with the first coil located in the middle circle. The first connectors are arranged in a staggered manner, and the first connectors and the second connectors are located on different layers.

8. The inductive device as claimed in claim 6, wherein the side connecting portions are located on the first side of the inductive device.

9. The inductive device according to claim 6, wherein the side connection portions are respectively located on a third side and a fourth side of the inductive device, wherein the third side is different from the first side and the second side side, the fourth side is different from the first side and the second side, and the third side is different from the fourth side.

10. The inductive device as claimed in claim 6, wherein the side connection parts are located on the second side of the inductive device.