Inductor device

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

Technical Field

[0001] The present invention relates to an electronic device, and more particularly to an inductive device. Background Art

[0002] The various types of inductors currently available all have their advantages and disadvantages. For example, a figure-eight inductor has two sets of coils that induce currents in different directions and cancel each other out, which reduces the coupling between objects from other magnetic field sources. However, the figure-eight inductor occupies a larger area in the device and has a lower quality factor, and its parasitic capacitance is larger. For a double-helix series inductor, its quality factor (Q value) is higher and has a larger mutual inductance. However, its shape is more asymmetrical, and its ability to prevent external induction is worse than that of a figure-eight inductor. Therefore, the application scope of the above-mentioned inductors is limited. Summary of the invention

[0003] The invention summary is intended to provide a simplified summary of the present disclosure so that readers can have a basic understanding of the present disclosure. This invention summary is not a complete overview of the present disclosure, and it is not intended to point out the important / critical elements of the embodiments of the present disclosure or to define the scope of the present disclosure.

[0004] According to one embodiment of the present case, an inductor device is disclosed, including a figure-eight inductor structure, a first spiral coil, a first connector, a second connector, and a first interlaced portion. The inductor device retains the symmetrical interlaced structure of the figure-eight inductor and the high quality factor characteristics of the double spiral inductor, and improves parasitic capacitance and symmetry. The figure-eight inductor structure includes two first coils and two second coils. The first spiral coil is arranged 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.

[0005] According to another embodiment, an inductor device is disclosed, including an eight-shaped inductor structure, a first spiral coil, a second spiral coil, a first interlaced portion, a second interlaced portion, and a connector. 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 second spiral coil is disposed inside the two second coils, wherein the second spiral coil is coupled to one of the two second coils. The first interlaced portion couples one of the two first coils and the second spiral coil. The second interlaced portion couples the other of the two first coils and the first spiral coil. The connector couples the other of the two second coils and the first spiral coil, wherein the connector is interlaced with the first interlaced portion and the second interlaced portion, respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] 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, based on the needs of practical description. In fact, the size of each feature may be arbitrarily increased or decreased for the purpose of clarity of discussion.

[0007] Figure 1 FIG. 4 is a schematic diagram illustrating an inductive device according to some embodiments of the present invention.

[0008] Figure 2 FIG. 4 is a schematic diagram illustrating an inductive device according to some embodiments of the present invention.

[0009] Figure 3 FIG. 4 is a schematic diagram illustrating an inductive device according to some embodiments of the present invention.

[0010] Figure 4 FIG. 4 is a schematic diagram illustrating an inductive device according to some embodiments of the present invention.

[0011] Figure 5 FIG. 4 is a schematic diagram illustrating an inductive device according to some embodiments of the present invention.

[0012] Figure 6 FIG. 4 is a schematic diagram illustrating experimental data of an inductor device according to an embodiment of the present invention.

[0013] Explanation of symbols

[0014] 1, 2, 3, 4, 5: Inductor device

[0015] 10, 50: Figure 8 inductor structure

[0016] 111, 112: First coil

[0017] 121, 122: Second coil

[0018] 130: Input terminal

[0019] 140: Center tap terminal

[0020] 21, 21', 21": first helical coil

[0021] 22, 22', 22": second helical coil

[0022] 211, 212, 213, 221, 222, 223: sub-helical coils

[0023] 31, 32, 33, 34, 35, 36: Connectors

[0024] 32', 33', 33": Connectors

[0025] 41, 42, 43, 44: Interlaced

[0026] 51: The third spiral coil

[0027] 52: Fourth spiral coil

[0028] R1, R2, R3: imaginary lines

[0029] 511, 512: first coil

[0030] 521, 522: Second coil

[0031] 61: First spiral coil

[0032] 62: Second spiral coil

[0033] 71, 72: Connectors

[0034] 81, 82: Interlaced

[0035] L, Q: Curve DETAILED DESCRIPTION

[0036] The following disclosure provides many different embodiments to implement the different features of the present invention. The following describes the embodiments of the components and arrangements to simplify the present invention. Of course, these embodiments are exemplary only and are not intended to be restrictive. For example, the terms "first", "second", etc. used in the present invention to describe the components are only used to distinguish the same or similar components or operations. The terms are not used to limit the technical components of the present invention, nor are they used to limit the order or sequence of operations. In addition, the present invention can repeat the component symbols and / or letters in each embodiment, and the same technical terms can use the same and / or corresponding component symbols in each embodiment. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or configurations discussed.

[0037] Please refer to Figure 1, which is a schematic diagram of an inductive device 1 according to some embodiments of the present invention. Figure 1 As shown, the inductor device 1 includes an eight-shaped inductor structure 10, a first spiral coil 21 and a second spiral coil 22. The eight-shaped 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.

[0038] like Figure 1 As shown, the first coil 111 is coupled to the second coil 121 through the first connector 31. The first coil 112 is coupled to the first spiral coil 21 through the second connector 32. The first spiral coil 21 is coupled to the second coil 122 through the first interlaced portion 41. The second coils 121 and 122 are coupled to the second spiral coil 22 through the third connector 33 and the fourth connector 34, respectively. The first interlaced portion 41 is interlaced with the first connector 31 and the second connector 32, respectively.

[0039] In some embodiments, the figure eight inductor structure 10, the first interlaced portion 41, the first spiral coil 21 and the second spiral coil 22 are located in the first layer. The first connector 31, the second connector 32, the third connector 33 and the fourth connector 34 are located in the second layer. The first layer is different from the second layer.

[0040] like Figure 1 As shown, the first coils 111 and 112 and the second coils 121 and 122 form a similar duplicated projection relationship based on the imaginary line R1. The first spiral coil 21 and the second spiral coil 22 form a similar duplicated projection relationship based on the imaginary line R1.

[0041] In some embodiments, the input end 130 is disposed on a first side of the first coils 111 and 112. The first connector 31 and the second connector 32 are disposed on a second side 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.

[0042] In some embodiments, the first connection member 31 is disposed on a first side of the second coils 121 and 122. The third connection member 33 and the fourth connection member 34 are disposed on a second side of the second coils 121 and 122. For example, the first side of the second coils 121 and 122 is an upper side of the second coils 121 and 122, and the second side of the second coils 121 and 122 is a lower side of the second coils 121 and 122.

[0043] In some embodiments, the first helical coil 21 and the second helical coil 22 include one or more turns. Figure 1 The embodiment is described by taking a circle as an example.

[0044] In some embodiments, the input end 130, the first connection member 31, the second connection member 32, the third connection member 33, and the fourth connection member 34 are approximately aligned along a configuration line (not shown) perpendicular to the imaginary line R1, such as Figure 1 As shown, the first connecting member 31 , the second connecting member 32 , the third connecting member 33 and the fourth connecting member 34 are arranged from top to bottom on a plane, rather than being disposed on the left and right sides of the first coils 111 and 112 and / or the second coils 121 and 122 .

[0045] In some embodiments, the inductive device 1 includes a center tap 140. Figure 1 As shown, the central tap 140 is disposed at the interlaced portion of the third connector 33 and the fourth connector 34. In some embodiments, the third connector 33 and the fourth connector 34 are disposed at different layers. The central tap 140 can be disposed at the same layer as the third connector 33, or disposed at the same layer as the fourth connector 34.

[0046] Please refer to Figure 2 , which is a schematic diagram of an inductive device 2 according to some embodiments of the present case. Figure 2 Same as Figure 1 The descriptions of the numbered components are the same as those described above and will not be repeated here.

[0047] like Figure 2 As shown, the inductor device 2 includes an eight-shaped inductor structure 10, a first spiral coil 21' and a second spiral coil 22'. The eight-shaped inductor structure 10 includes two first coils 111 and 112 and two second coils 121 and 122. The first spiral coil 21' and the second spiral coil 22' have more than one spiral coil. 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.

[0048] In some embodiments, since the first spiral coil 21 ′ has more than one turn, the second connecting member 32 partially overlaps above or below the first spiral coil 21 ′ to connect to an end of the innermost turn of the first spiral coil 21 ′.

[0049] like Figure 2As shown, the second coil 121 is coupled to the second spiral coil 22' through the third connecting member 33'. The second spiral coil 22' is coupled to the second coil 122 through the second interlaced portion 42. Similarly, the second spiral coil 22' has more than one turn, and the third connecting member 33' partially overlaps the upper or lower part of the second spiral coil 22' to connect to one end of the innermost turn of the second spiral coil 22'.

[0050] In some embodiments, the first helical coil 21 ′ and the second helical coil 22 ′ include one or more turns. Figure 2 In this way, the number of turns of the spiral coil in the figure-eight inductor structure increases, and the inductance value of the inductor structure 2 can also be increased accordingly.

[0051] Please refer to Figure 3 , which is a schematic diagram of an inductive device 3 according to some embodiments of the present case. Figure 3 Same as Figure 1 and Figure 2 The descriptions of the numbered components are the same as those described above and will not be repeated here.

[0052] like Figure 3 As shown, the inductor device 1 includes an eight-shaped inductor structure 10, a first spiral coil 21', a second spiral coil 22', a third spiral coil 51 and a fourth spiral coil 52. The third spiral coil 51 is disposed above or below the first spiral coil 21' and partially overlaps. The fourth spiral coil 52 is disposed above or below the second spiral coil 22' and partially overlaps.

[0053] Figure 2 The second connecting member 32 of the inductive device 2 is coupled to the first spiral coil 21', whereas the second connecting member 32' of the inductive device 3 is coupled to the third spiral coil 51. Figure 3 As shown, the first coil 112 is coupled to the first end of the third spiral coil 51 through the second connector 32'. In the direction of looking down at the inductor device 3, the second end of the third spiral coil 51 is coupled to the first spiral coil 21' through a vertical connector (eg, via).

[0054] Figure 2 The third connecting member 33' of the inductive device 2 is coupled to the second spiral coil 22'. In contrast, the third connecting member 33" of the inductive device 3 is coupled to the fourth spiral coil 52. Figure 3 As shown, the second coil 121 is coupled to the first end of the fourth spiral coil 52 through the third connector 33 ″. In the direction of looking down at the inductor device 3 , the second end of the fourth spiral coil 52 is coupled to the fourth spiral coil 22 ′ through the vertical connector.

[0055] In some embodiments, the figure eight inductor structure 10, the first spiral coil 21', the first interlaced portion 41, the second spiral coil 22' and the second interlaced portion 42 are located in the first layer. The third spiral coil 51, the first connector 31, the second connector 32', the fourth spiral coil 52 and the third connector 33' are located in the second layer. The first layer is different from the second layer.

[0056] Please refer to Figure 4 , which is a schematic diagram of an inductive device 4 according to some embodiments of the present invention. Figure 4 As shown, the inductor device 4 includes an eight-shaped inductor structure 10, a first spiral coil 21″ and a second spiral coil 22″. The eight-shaped inductor structure 10 includes two first coils 111 and 112 and two second coils 121 and 122. The first spiral coil 21″ is arranged inside the first coils 111 and 112. The second spiral coil 22″ is arranged inside the second coils 121 and 122.

[0057] The spiral structure of the inductor device 4 is different from the spiral structure of the inductor device 1. Figure 4 As shown, the first spiral coil 21" includes sub-spiral coils 211, 212 and 213. The sub-spiral coil 211 is coupled to the second coil 122 through the first interlaced portion 41. The sub-spiral coil 212 is coupled to the first coil 112 through the second connecting member 32. The sub-spiral coil 213 is coupled to the sub-spiral coil 211 through the fifth connecting member 35 and to the sub-spiral coil 212 through the third interlaced portion 43. In this embodiment, the third interlaced portion 43 and the fifth connecting member 35 are interlacedly coupled on the upper side of the first spiral coil 21".

[0058] like Figure 4 As shown, the second spiral coil 22" includes sub-spiral coils 221, 222 and 213. The sub-spiral coil 221 is coupled to the second coil 122 through the second interlaced portion 42. The sub-spiral coil 222 is coupled to the second coil 121 through the third connecting member 33'. The sub-spiral coil 223 is coupled to the sub-spiral coil 221 through the sixth connecting member 36 and to the sub-spiral coil 222 through the fourth interlaced portion 44. In this embodiment, the fourth interlaced portion 44 and the sixth connecting member 36 are interlacedly coupled on the upper side of the second spiral coil 22".

[0059] like Figure 4 As shown, the first coils 111 and 112 and the second coils 121 and 122 form a similar duplicate projection relationship based on the imaginary line R2. The first spiral coil 21" and the second spiral coil 22" form a similar duplicate projection relationship based on the imaginary line R2.

[0060] The inductor device 4 includes an input terminal 130. The input terminal 130 is disposed on the upper side of the first coils 111 and 112. In some embodiments, the input terminal 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.

[0061] Please refer to Figure 5 , which is a schematic diagram of an inductive device 5 according to some embodiments of the present invention. Figure 5 As shown, the inductor device 5 includes an eight-shaped inductor structure 50, a first spiral coil 61 and a second spiral coil 62. The eight-shaped inductor structure 50 includes two first coils 511 and 512 and two second coils 521 and 522. The first spiral 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.

[0062] like Figure 5 As shown, the first coil 511 is coupled to the second spiral coil 62 through the first interlaced portion 81. The first coil 512 is coupled to the first spiral coil 61 through the second interlaced portion 82. The first spiral coil 61 is coupled to the second coil 522 through the first connecting member 71. The second coil 522 is coupled to the second spiral coil 62 through the second connecting member 72. The first interlaced portions 11 and 82 are interlaced with the first connecting member 71 and the second connecting member 72, respectively.

[0063] In some embodiments, the figure eight inductor structure 50, the first interlaced portion 81, the second interlaced portion 82, the first spiral coil 61 and the second spiral coil 62 are located in the first layer. The first connector 71 and the second connector 72 are located in the second layer. The first layer is different from the second layer.

[0064] like Figure 5 As shown, the first coils 511 and 512 and the second coils 521 and 522 form a mirror relationship based on the imaginary line R3. The first spiral coil 21 and the second spiral coil 22 form a nearly mirror relationship based on the imaginary line R3.

[0065] Please refer to Figure 6 , is a schematic diagram showing experimental data of an inductor device according to an embodiment of the present invention. Figure 6 As shown, using the architecture configuration of this case, the experimental curve of the quality factor is Q, and the experimental curve of the inductance value is L, where the value of the curve L (i.e. the inductance value nH) shares the value of the curve Q (i.e. the quality factor, such as Figure 6 The Y-axis value on the left. Figure 6It can be seen that the inductor device using the structure of the present case has a better inductance per unit area. For example, in the area of ​​the inductor device of 12um*8um or 14um*8um, as shown by curve L, at a frequency of 7GHz, the inductance value is about 1.11, and as shown by curve Q, the quality factor is about 17.85. As shown by curve L, at a frequency of 8GHz, the inductance value is about 1.14nH, and as shown by curve Q, the quality factor can reach about 17.77.

[0066] From the above embodiments of the present invention, it can be seen that a capacitance value is generated between the figure-eight inductor structure and the spiral coil, for example Figure 1 The first coil 111 and the left side of the first spiral coil 21, and the second coil 121 and the left side of the second spiral coil 22 are connected to each other. The inductor device of the present invention has a symmetrical structure, and coupling is generated on the left and right sides and the upper and lower sides (if any) of the inductor device. In this way, the inductor device of the present invention can have a better inductance per unit area.

[0067] The above content summarizes the features of several embodiments so that those skilled in the art can better understand the aspects of the present invention. Those skilled in the art should understand that the above content can be easily used as a basis for designing or modifying other changes without departing from the spirit and scope of the present invention to implement the same purpose and / or achieve the same advantages of the embodiments described herein. The above content should be understood as an example of the present invention, and its protection scope should be based on the scope of the patent application.

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; as well as 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 on 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: 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 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.

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