CN114203405B

CN114203405B - Inductor device

Info

Publication number: CN114203405B
Application number: CN202010910477.9A
Authority: CN
Inventors: 颜孝璁; 陈家源
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2025-03-18
Anticipated expiration: 2040-09-02
Also published as: CN114203405A

Abstract

An inductor device includes an eight-shaped inductor structure, a first spiral coil, a first connector, a second connector, and a first interlaced portion. The eight-shaped inductor structure includes two first coils and two second coils. The first spiral coil is disposed inside the two first coils. The first connector couples one of the two first coils and one of the two second coils. The second connector couples the other of the two first coils. The first interlaced portion couples the first spiral coil and the other of the two second coils, wherein the first interlaced portion is interlaced with the first connector and the second connector, respectively.

Description

Inductance device

Technical Field

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

Background

The conventional inductors of various types have advantages and disadvantages. The splayed inductor has two groups of coils which sense currents in different directions respectively so as to cancel each other, so that the coupling between the splayed inductor and other objects with magnetic field sources is lower, however, the splayed inductor occupies a larger area in the device, has lower quality factors and has larger parasitic capacitance. For the double spiral series inductor, the quality factor (Q value) is higher and the mutual inductance value (mutual inductance) is larger, however, the shape is more asymmetric, and the capability of preventing external induction is poorer than that of the splay inductor. Therefore, the application range of the inductor is limited.

Disclosure of Invention

This summary is intended to provide a simplified summary of the disclosure so that the reader will essentially understand the disclosure. This summary is not an extensive overview of the disclosure and is intended to neither identify key/critical elements of the embodiments nor delineate the scope of the present disclosure.

According to one embodiment of the present disclosure, an inductor device is disclosed, which includes a splayed inductor structure, a first spiral coil, a first connecting member, a second connecting member, and a first interlacing portion. The inductance device maintains the characteristics of the symmetrical staggered structure of the splayed inductor and the high quality factor of the double-spiral inductor, and improves parasitic capacitance and symmetry. The splayed inductance structure comprises two first coils and two second coils. The first helical coils are arranged inside the two first coils. The first connecting piece is coupled with one of the two first coils and one of the two second coils. The second connecting piece is coupled with the other of the two first coils. The first interlacing portion is coupled to the other of the first spiral coil and the two second coils, wherein the first interlacing portion is interlaced with the first connecting member and the second connecting member, respectively.

According to another embodiment, an inductive device is disclosed that includes a splayed inductive structure, a first helical coil, a second helical coil, a first interleaved portion, a second interleaved portion, and a connector. The splayed inductance structure comprises two first coils and two second coils. The first helical coils are arranged inside the two first coils. The second spiral coil is arranged inside the two second coils, wherein the second spiral coil is coupled with one of the two second coils. The first interlacing portion is coupled to one of the two first coils and the second spiral coil. The second interlacing portion is coupled to the other of the two first coils and the first spiral coil. The connecting piece is coupled with the other of the two second coils and the first spiral coil, wherein the connecting piece is respectively staggered with the first staggered part and the second staggered part.

Drawings

The following detailed description, when read in conjunction with the accompanying drawings, will facilitate a better understanding of the aspects of the present disclosure. It should be noted that the features in the drawings are not necessarily drawn to scale according to the requirements of the actual implementation in the description. In fact, the dimensions of the various features may be arbitrarily increased or decreased for clarity of discussion.

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

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

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

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

Fig. 5 is a schematic diagram illustrating an inductance device according to some embodiments of the present disclosure.

Fig. 6 is a schematic diagram of experimental data of an inductance device according to an embodiment of the present disclosure.

Symbol description

1.2, 3, 4, 5: Inductance means

10. 50-Splayed inductor structure

111. 112 First coil

121. 122 Second coil

130 Input terminal

140 Central tap end

21. 21', 21'

22. 22', 22'

211. 212, 213, 221, 222, 223 Sub-helical coils

31. 32, 33, 34, 35, 36, Connecting piece

32', 33": Connection

41. 42, 43, 44, Staggered portions

51 Third helical coil

52 Fourth helical coil

R1, R2, R3, imaginary line

511. 512 First coil

521. 522 Second coil

61 First helical coil

62 Second helical coil

71. 72 Connecting piece

81. 82 Staggered part

L, Q Curve of the graph

Detailed Description

The following disclosure provides many different embodiments for implementing different features of the disclosure. Embodiments of elements and arrangements are described below to simplify the present disclosure. Of course, these embodiments are merely examples and are not intended to be limiting. For example, the terms first and second are used herein to describe elements as being used solely for distinguishing between similar or identical elements or acts and not to limit the scope of the invention or to limit the order or sequence of acts. In addition, reference numerals and/or letters may be repeated among the various examples, and the same reference numerals and/or corresponding reference numerals may be used in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Referring to fig. 1, a schematic diagram of an inductance device 1 according to some embodiments of the present disclosure is shown. As shown in fig. 1, the inductor device 1 includes a splayed inductor structure 10, a first spiral coil 21, and a second spiral coil 22. The splayed inductor structure 10 includes two first coils 111 and 112 and two second coils 121 and 122. The first helical coil 21 is disposed inside the first coils 111 and 112. The second spiral coil 22 is disposed inside the second coils 121 and 122.

As shown in fig. 1, the first coil 111 is coupled to the second coil 121 through the first connection member 31. The first coil 112 is coupled to the first helical coil 21 through the second connector 32. The first spiral coil 21 is coupled to the second coil 122 through the first interlacing portion 41. The second coils 121 and 122 are coupled to the second helical coil 22 through the third connecting member 33 and the fourth connecting member 34, respectively. The first staggering portions 41 stagger with the first connecting piece 31 and the second connecting piece 32, respectively.

In some embodiments, the splayed inductor structure 10, the first staggered portion 41, the first spiral coil 21 and the second spiral coil 22 are located on the first layer. The first connection 31, the second connection 32, the third connection 33 and the fourth connection 34 are located in the second layer. The first layer is different from the second layer.

As shown in fig. 1, the first coils 111 and 112 and the second coils 121 and 122 form an approximately replica-type projection (duplicated projection) relationship based on the imaginary line R1. The first helical coil 21 and the second helical coil 22 form an approximately replica-type projection relationship based on the virtual line R1.

In some embodiments, the input end 130 is disposed on a first side of the first coils 111 and 112. The first and second connection members 31 and 32 are disposed at the second sides of the first coils 111 and 112. The first side of the first coils 111 and 112 is opposite to the second side. For example, the first side is the upper side of the first coils 111 and 112, and the second side of the first coils 111 and 112 is the lower side of the first coils 111 and 112.

In some embodiments, the first connection 31 is disposed on a first side of the second coils 121 and 122. The third and fourth connection members 33 and 34 are disposed at the second sides of the second coils 121 and 122. For example, the first sides of the second coils 121 and 122 are upper sides of the second coils 121 and 122, and the second sides of the second coils 121 and 122 are lower sides of the second coils 121 and 122.

In some embodiments, the first helical coil 21 and the second helical coil 22 include one or more turns. The embodiment of fig. 1 is illustrated with a circle as an example.

In some embodiments, the input end 130, the first connecting member 31, the second connecting member 32, the third connecting member 33 and the fourth connecting member 34 are approximately aligned along a configuration line (not shown) perpendicular to the imaginary line R1, as shown in fig. 1, the first connecting member 31, the second connecting member 32, the third connecting member 33 and the fourth connecting member 34 are configured from top to bottom in a plane instead of being disposed on the left and right sides of the first coils 111 and 112 and/or the second coils 121 and 122.

In some embodiments, the inductive device 1 includes a center tap 140. As shown in fig. 1, the center tap 140 is disposed at the staggered portion of the third link 33 and the fourth link 34. In some embodiments, the third connector 33 and the fourth connector 34 are disposed in different layers. The center tap 140 may be disposed at the same level as the third connector 33 or at the same level as the fourth connector 34.

Referring to fig. 2, a schematic diagram of an inductance device 2 according to some embodiments of the present disclosure is shown. Elements in fig. 2 that are the same as numbered elements in fig. 1 are the same as described above and will not be repeated here.

As shown in fig. 2, the inductance device 2 includes a splayed inductance structure 10, a first spiral coil 21', and a second spiral coil 22'. The splayed inductor structure 10 includes two first coils 111 and 112 and two second coils 121 and 122. The first helical coil 21 'and the second helical coil 22' have more than one turn of helical coils. The first helical coil 21' is disposed inside the first coils 111 and 112. The second spiral coil 22' is disposed inside the second coils 121 and 122.

In some embodiments, since the number of turns of the first helical coil 21' is more than one, the second connecting member 32 is partially overlapped above or below the first helical coil 21' to be connected to one end of the innermost turn of the first helical coil 21 '.

As shown in fig. 2, the second coil 121 is coupled to the second helical coil 22 'through the third connection 33'. The second helical coil 22' is coupled to the second coil 122 through the second interleaved section 42. Similarly, the number of turns of the second helical coil 22 'is more than one, and the third connecting member 33' is partially overlapped above or below the second helical coil 22 'to be connected to one end of the innermost turn of the second helical coil 22'.

In some embodiments, the first helical coil 21 'and the second helical coil 22' include one or more turns. The embodiment of fig. 2 is exemplified by a plurality of turns. In this way, the number of turns of the spiral coil in the splayed inductor structure is increased, and the inductance value of the inductor structure 2 can be increased accordingly.

Referring to fig. 3, a schematic diagram of an inductance device 3 according to some embodiments of the present disclosure is shown. The numbered elements in fig. 3 that are identical to those in fig. 1 and 2 are identical to those described above and will not be repeated here.

As shown in fig. 3, the inductor device 1 includes a splayed inductor structure 10, a first helical coil 21', a second helical coil 22', a third helical coil 51, and a fourth helical coil 52. The third helical coil 51 is disposed above or below the first helical coil 21' and partially overlaps. The fourth helical coil 52 is disposed above or below the second helical coil 22' and partially overlaps.

The second connection 32 of the inductive device 2 of fig. 2 is coupled to the first helical coil 21', in contrast to the second connection 32' of the inductive device 3 being coupled to the third helical coil 51. As shown in fig. 3, the first coil 112 is coupled to the first end of the third helical coil 51 through the second connector 32'. The second end of the third helical coil 51 is coupled to the first helical coil 21' via a vertical connection (e.g. via) in the direction of looking down the inductor device 3.

The third connection 33 'of the inductive device 2 of fig. 2 is coupled to the second helical coil 22', in contrast to the third connection 33 "of the inductive device 3 being coupled to the fourth helical coil 52. As shown in fig. 3, the second coil 121 is coupled to the first end of the fourth helical coil 52 through the third connection member 33 ". The second end of the fourth helical coil 52 is coupled to the fourth helical coil 22' via a vertical connection in a direction looking down the inductor device 3.

In some embodiments, the splayed inductor structure 10, the first spiral coil 21', the first staggered portion 41, the second spiral coil 22', and the second staggered portion 42 are located in the first layer. The third helical coil 51, the first connector 31, the second connector 32', the fourth helical coil 52 and the third connector 33' are located in the second layer. Wherein the first layer is different from the second layer.

Referring to fig. 4, a schematic diagram of an inductance device 4 according to some embodiments of the present disclosure is shown. As shown in fig. 4, the inductance device 4 includes a splayed inductance structure 10, a first spiral coil 21″ and a second spiral coil 22″. The splayed inductor structure 10 includes two first coils 111 and 112 and two second coils 121 and 122. The first spiral coil 21″ is disposed inside the first coils 111 and 112. The second spiral coil 22″ is disposed inside the second coils 121 and 122.

The spiral structure of the inductive device 4 is different from the spiral structure of the inductive device 1. As shown in fig. 4, the first helical coil 21″ includes sub-helical coils 211, 212, and 213. The sub-spiral coil 211 is coupled to the second coil 122 through the first interlacing portion 41. The sub-helical coil 212 is coupled to the first coil 112 through the second connector 32. The sub-spiral coil 213 is coupled to the sub-spiral coil 211 through the fifth connection 35 and coupled to the sub-spiral coil 212 through the third stagger 43. In this embodiment, the third staggering portion 43 and the fifth connecting member 35 are staggeredly coupled on the upper side of the first spiral coil 21″.

As shown in fig. 4, the second helical coil 22″ includes sub-helical coils 221, 222, and 213. The sub-spiral coil 221 is coupled to the second coil 122 through the second interleaving portion 42. The sub-helical coil 222 is coupled to the second coil 121 through the third connection 33'. The sub-spiral coil 223 is coupled to the sub-spiral coil 221 through the sixth connection member 36 and coupled to the sub-spiral coil 222 through the fourth stagger portion 44. In this embodiment, the fourth stagger portion 44 and the sixth connecting member 36 are staggerly coupled on the upper side of the second helical coil 22 ".

As shown in fig. 4, the first coils 111 and 112 and the second coils 121 and 122 form an approximately replica-type projection (duplicate projection) relationship based on the imaginary line R2. The first helical coil 21 "and the second helical coil 22" form an approximately replica-type projection relationship based on the virtual line R2.

The inductive device 4 comprises an input 130. The input terminal 130 is disposed on the upper side of the first coils 111 and 112. In some embodiments, the input end 130, the first connector 31, the second connector 32, the third connector 33', the fifth connector 35, and the sixth connector 36 are approximately aligned along a configuration line (not shown) perpendicular to the imaginary line R2.

Referring to fig. 5, a schematic diagram of an inductance device 5 according to some embodiments of the present disclosure is shown. As shown in fig. 5, the inductance device 5 includes a splayed inductance structure 50, a first spiral coil 61, and a second spiral coil 62. The splayed inductor structure 50 includes two first coils 511 and 512 and two second coils 521 and 522. The first helical coil 61 is disposed inside the first coils 511 and 512. The second spiral coil 62 is disposed inside the second coils 621 and 622.

As shown in fig. 5, the first coil 511 is coupled to the second spiral coil 62 through the first interlacing portion 81. The first coil 512 is coupled to the first helical coil 61 through the second interlacing portion 82. The first helical coil 61 is coupled to the second coil 522 through the first connection 71. The second coil 522 is coupled to the second helical coil 62 through a second connector 72. The first staggering portions 11 and 82 stagger with the first connecting piece 71 and the second connecting piece 72, respectively.

In some embodiments, the splayed inductor structure 50, the first staggered portion 81, the second staggered portion 82, the first spiral coil 61 and the second spiral coil 62 are located on the first layer. The first connection 71 and the second connection 72 are located in the second layer. The first layer is different from the second layer.

As shown in fig. 5, the first coils 511 and 512 and the second coils 521 and 522 form a mirror-type (mirror) relationship based on the imaginary line R3. The first helical coil 21 and the second helical coil 22 are formed in approximately a mirror-image relationship based on the virtual line R3.

Fig. 6 is a schematic diagram illustrating experimental data of an inductance device according to an embodiment of the invention. As shown in fig. 6, with the configuration of the present embodiment, the experimental curve of the quality factor is Q, the experimental curve of the inductance value is L, wherein the value of the curve L (i.e. the inductance value nH) shares the value of the curve Q (i.e. the quality factor, as shown in the Y-axis value on the left side of fig. 6). As can be seen from fig. 6, the inductance device adopting the structure of the present invention has a better inductance value per unit area. For example, the inductance of the inductor device is about 1.11 at 7GHz, as shown by curve L, and the inductance of the inductor device is about 17.85 at a frequency of 7GHz, as shown by curve Q, in an area of 12um x 8um or 14um x 8 um. Further, as shown in curve L, the inductance is about 1.14nH at 8GHz, and as shown in curve Q, the quality factor can be about 17.77.

As is clear from the above embodiment, a capacitance value is generated between the splayed inductance structure and the spiral coil, for example, a portion between the first coil 111 and the left side of the first spiral coil 21 and a portion between the second coil 121 and the left side of the second spiral coil 22 in fig. 1. The inductor device of this case has a symmetrical structure, and coupling occurs on the left and right sides and the upper and lower sides (if any) of the inductor device. Thus, the inductance device can have better inductance value per unit area.

The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. It will be appreciated by those skilled in the art that the foregoing has been readily utilized as a basis for designing or modifying other changes for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein without departing from the spirit and scope of the present disclosure. The above description should be taken as illustrative examples and the scope of the invention is defined by the claims.

Claims

1. An inductive device, comprising:

An eight-shaped inductor structure, comprising two first coils located at an upper portion of the eight-shaped inductor structure and two second coils located at a lower portion of the eight-shaped inductor structure;

a first spiral coil disposed inside the two first coils;

a first connecting member, coupling one of the two first coils and one of the two second coils;

a second connecting member, wherein one end of the first spiral coil is coupled to the other of the two first coils through the second connecting member, so that one end of the first spiral coil is coupled to the upper portion of the figure-eight inductor structure; and

A first interlaced portion couples the other end of the first spiral coil and the other of the two second coils to couple the other end of the first spiral coil to the lower portion of the figure eight inductor structure, wherein the first interlaced portion is interlaced with the first connector and the second connector, respectively.

2. The inductive device according to claim 1, further comprising:

a second spiral coil disposed inside the two second coils; and

a third connecting member, coupled to one of the two second coils;

One of the two second coils is coupled to the second spiral coil through the third connecting member.

3. The inductive device according to claim 2, further comprising:

A fourth connecting member is coupled to the other of the two second coils.

4. The inductive device according to claim 1, further comprising:

A third spiral coil is disposed above or below the first spiral coil, wherein the third spiral coil is coupled to the first spiral coil.

5. The inductive device according to claim 2, further comprising:

A fourth spiral coil is disposed above or below the second spiral coil, wherein the fourth spiral coil is coupled to the second spiral coil.

6. The inductive device according to claim 3, further comprising:

An input terminal is disposed at a first side of the two first coils;

The first connecting member and the second connecting member are arranged on a second side of the two first coils, wherein the second side of the two first coils is relative to the first side of the two first coils, and the first connecting member is arranged on a first side of the two second coils, and the third connecting member and the fourth connecting member are arranged on a second side relative to the first side of the two second coils.

7 . The inductive device of claim 6 , wherein the first spiral coil and the second spiral coil form a nearly replica projection based on an imaginary line between the second sides of the two first coils and the first sides of the two second coils.

8. The inductor device of claim 6, wherein the first spiral coil and the second spiral coil form a nearly mirror relationship based on an imaginary line between the second sides of the two first coils and the first sides of the two second coils.

9. An inductive device, comprising:

a first spiral coil disposed inside the two first coils;

a second spiral coil disposed inside the two second coils, wherein the second spiral coil is coupled to one of the two second coils;

a first interlaced portion coupling one of the two first coils and the second spiral coil;

a second interlaced portion, wherein one end of the first spiral coil is coupled to the other of the two first coils through the second interlaced portion, so that one end of the first spiral coil is coupled to the upper portion of the figure-eight inductor structure; and

A connector is coupled to the other of the two second coils and the other end of the first spiral coil, so that the other end of the first spiral coil is coupled to the lower portion of the figure eight inductor structure, wherein the connector is interlaced with the first interlaced portion and the second interlaced portion respectively.