Integrated Inductor

Abstract

The present disclosure relates to an integrated inductor. An integrated inductor includes a first winding and a second winding, and has a first endpoint, a second endpoint and a node. The first winding has the first endpoint and the node as two endpoints, and includes a first coil and a second coil, and the first coil and the second coil do not overlap. The second winding has the second endpoint and the node as two endpoints, and includes a third coil and a fourth coil, and the third coil and the fourth coil do not overlap. The first coil and the third coil have an overlapping range, and the second coil and the fourth coil have an overlapping range. The first coil is surrounded by the third coil, and the fourth coil is surrounded by the second coil.

Description

Technical Field

[0001] The present invention relates to an integrated inductor, and more particularly to an integrated inductor with high symmetry. Background Art

[0002] Inductors are the main components of transformers, and inductors and transformers are important components used in RF integrated circuits to achieve single-ended to differential signal conversion, signal coupling, impedance matching and other functions. With the development of integrated circuits towards system on chip (SoC), integrated inductors have gradually replaced traditional discrete components and are widely used in RF integrated circuits. The layout of the integrated inductor greatly affects the characteristics of the integrated inductor (such as inductance value and quality factor (Q), etc.), so designing a highly symmetrical integrated inductor has become an important issue. Summary of the invention

[0003] In view of the shortcomings of the prior art, an object of the present invention is to provide an integrated inductor.

[0004] The present invention discloses an integrated inductor. The integrated inductor includes a first winding and a second winding, and has a first endpoint, a second endpoint and a node. The first winding has the first endpoint and the node as two endpoints, and includes a first coil and a second coil, and the first coil and the second coil do not overlap. The second winding has the second endpoint and the node as two endpoints, and includes a third coil and a fourth coil, and the third coil and the fourth coil do not overlap. The first coil and the third coil have an overlapping range, and the second coil and the fourth coil have an overlapping range. The integrated inductor is substantially symmetrical to an axis of symmetry, the axis of symmetry does not overlap with the first coil, the second coil, the third coil and the fourth coil, and the first endpoint and the second endpoint are located on different sides of the axis of symmetry.

[0005] The present invention further discloses an integrated inductor. The integrated inductor includes a first winding and a second winding, and has a first endpoint, a second endpoint and a node. The first winding has the first endpoint and the node as two endpoints, and includes a first coil and a second coil, and the first coil and the second coil do not overlap. The second winding has the second endpoint and the node as two endpoints, and includes a third coil and a fourth coil, and the third coil and the fourth coil do not overlap. The first coil and the third coil have an overlapping range, and the second coil and the fourth coil have an overlapping range. The first coil is surrounded by the third coil, and the fourth coil is surrounded by the second coil.

[0006] Compared with conventional technologies, the integrated inductor of the present invention has excellent symmetry and thus has better component characteristics and performance.

[0007] The features, implementation and effects of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figures 1A-1C The structure of an integrated inductor according to an embodiment of the present invention;

[0009] Figure 2A-2B are two windings of the integrated inductor of FIG1 ;

[0010] Figure 3 The structure of an integrated inductor according to an embodiment of the present invention;

[0011] Figure 4 The structure of an integrated inductor according to another embodiment of the present invention;

[0012] Figure 5 The relationship between the inductance value and the frequency of the two sub-inductors of the integrated inductor of the present invention;

[0013] Figures 6A-6C A structure of an integrated inductor according to another embodiment of the present invention; and

[0014] Figures 7A-7C FIG. 4 is a structure of an integrated inductor according to another embodiment of the present invention. DETAILED DESCRIPTION

[0015] The technical terms used in the following description refer to the customary terms in the technical field. If some terms are explained or defined in this specification, the interpretation of these terms shall be based on the explanation or definition in this specification.

[0016] The disclosure of the present invention includes an integrated inductor. Since some components included in the integrated inductor of the present invention may be known components individually, the details of the known components will be omitted in the following description without affecting the full disclosure and feasibility of the device invention.

[0017] Figures 1A-1C The structure of an integrated inductor according to an embodiment of the present invention is shown. The integrated inductor 100 is implemented in a first conductor layer and a second conductor layer in a semiconductor structure. In some embodiments, the first conductor layer may be one of an ultra-thick metal (UTM) layer and a re-distribution layer (RDL), and the second conductor layer is the other of the UTM and the RDL. Figure 1A The complete structure of the integrated inductor 100 is shown. Figure 1B The layout of the integrated inductor 100 on the first conductor layer is shown. Figure 1CThe layout of the integrated inductor 100 on the second conductor layer is shown. Except for the bridging line segment 145 and the bridging line segment 195, the line segments or traces of the integrated inductor 100 are all located on the first conductor layer. The bridging line segment 145 and the bridging line segment 195 are connected to the line segments of the first conductor layer through a through structure, and the through structure can be a via or a via array.

[0018] like Figure 1A As shown, the integrated inductor 100 is a highly symmetrical structure. More specifically, the integrated inductor 100 is substantially symmetrical about the horizontal symmetry axis R1H and the vertical symmetry axis R1V (the horizontal symmetry axis R1H and the vertical symmetry axis R1V are substantially perpendicular to each other). Endpoints 111 and 161 are two endpoints of the integrated inductor 100, and reference numeral 102 represents a node of the integrated inductor 100. After the signal (i.e., current) enters the integrated inductor 100 from the terminal 111, it flows through the entire integrated inductor 100 in the following order: the outer circle on the right side of the vertical symmetry axis R1V (i.e., most of the dark gray line segments) → the inner circle on the left side of the vertical symmetry axis R1V (dark gray line segments) → the jumper segment 145 → the dark gray line segment between the jumper segment 145 and the node 102 → the node 102 → the outer circle on the left side of the vertical symmetry axis R1V (i.e., most of the light gray line segments) → the jumper segment 195 → the inner circle on the right side of the vertical symmetry axis R1V (light gray line segments) → a small section of the light gray line segment on the left side of the vertical symmetry axis R1V → leaving the integrated inductor 100 from the terminal 161. In other words, the current direction 151 of the right half of the integrated inductor 100 is different from the current direction 152 of the left half of the integrated inductor 100 (one is clockwise and the other is counterclockwise), so that the magnetic field generated by the integrated inductor 100 is less likely to diverge, thereby avoiding affecting other components or preventing the integrated inductor 100 from being affected by an external magnetic field.

[0019] The integrated inductor 100 can be considered to be composed of two windings: winding 110 ( Figure 2A ) and winding 160( Figure 2B ). The winding 110 includes Figure 1A The dark grey trace and jumper segment 145, and the winding 160 includes Figure 1AThe light gray traces and jumper segment 195 are shown. End point 111 and node 102 are two endpoints of winding 110, and end point 161 and node 102 are two endpoints of winding 160. In other words, winding 110 and winding 160 are connected through node 102. In some embodiments, the length of the trace between node 102 and end point 111 is substantially equal to the length of the trace between node 102 and end point 161; in other words, the total length of the traces of winding 110 is substantially equal to the total length of the traces of winding 160. The current entering the integrated inductor 100 flows through the entirety of one of winding 110 and winding 160, then flows into the other through node 102, and then flows through the entirety of the other. As Figure 2A and 2B As shown, because the wiring of winding 110 and winding 160 on the first conductor layer is substantially equal in length, and the wiring of winding 110 and winding 160 on the second conductor layer is substantially equal in length (ie, jumper segment 145 and jumper segment 195 are substantially equal in length), winding 110 and winding 160 are electrically quite symmetrical.

[0020] The winding 110 includes a coil 120 and a coil 130. The coil 120 and the coil 130 are connected by a cross structure 140, and the coil 120 and the coil 130 do not overlap. The current direction of the coil 120 is opposite to the current direction of the coil 130 (one is clockwise and the other is counterclockwise). The winding 110 is symmetrical about the horizontal symmetry axis R1H, but not symmetrical about the vertical symmetry axis R1V. The horizontal symmetry axis R1H overlaps with the coil 120 and the coil 130, but the vertical symmetry axis R1V does not overlap with the coil 120 and the coil 130.

[0021] The winding 160 includes a coil 170 and a coil 180. The coil 170 and the coil 180 are connected by a cross structure 190, and the coil 170 and the coil 180 do not overlap. The current direction of the coil 170 is opposite to the current direction of the coil 180. The current direction of the coil 170 is the same as the current direction of the coil 120, and the current direction of the coil 180 is the same as the current direction of the coil 130. The winding 160 is symmetrical about the horizontal symmetry axis R1H, but asymmetrical about the vertical symmetry axis R1V. The horizontal symmetry axis R1H overlaps with the coil 170 and the coil 180, but the vertical symmetry axis R1V does not overlap with the coil 170 and the coil 180.

[0022] like Figure 2A and 2B As shown, the sizes of coil 120 and coil 180 are substantially equal (ie, the line segments or traces of the two are substantially equal in length), and the sizes of coil 130 and coil 170 are substantially equal (ie, the line segments or traces of the two are substantially equal in length).

[0023] Please also refer to Figure 1A , Figure 2A and Figure 2B, the coil 120 and the coil 170 have an overlapping range and the coil 170 surrounds the coil 120, and the coil 130 and the coil 180 have an overlapping range and the coil 130 surrounds the coil 180. In other words, the area surrounded by the coil 120 (e.g., the area of ​​the approximately dotted line frame 125) overlaps with the area surrounded by the coil 170 (e.g., the area of ​​the approximately dotted line frame 175). Similarly, the area surrounded by the coil 130 overlaps with the area surrounded by the coil 180. The coil 120, the coil 130, the coil 170, and the coil 180 are all single-turn structures, so that the integrated inductor 100 has a structure of two turns on the left and right (relative to the vertical symmetry axis R1V).

[0024] like Figure 1A As shown, the terminals 111, 161 and the node 102 are located on the same side of the integrated inductor 100 (ie, below the horizontal symmetry axis R1H), and the coil 120 is located between the terminals 111 and 161. Furthermore, the terminals 111 and 161 are located on different sides of the vertical symmetry axis R1V.

[0025] The through structure on the terminal 161 is used for signal (i.e., current) feed-in or feed-out. In other embodiments, the through structure may also be implemented on the terminal 111 to enhance the electrical symmetry of the winding 110 and the winding 160. Figure 3 As shown, the terminal 111 is connected to the extension line segment 112 through the through structure, and the terminal 161 is connected to the extension line segment 162 through the through structure, and the current is fed into or out of the integrated inductor 100 through the extension line segment 112 and the extension line segment 162. The extension line segment 112 and the extension line segment 162 are located on different sides of the vertical symmetry axis R1V. Please also refer to Figure 2B and Figure 3 , the extended line segment 162 intersects the coil 170 .

[0026] Figure 4 FIG. 4 is a structure of an integrated inductor according to an embodiment of the present invention. Figure 4 The integrated inductor 200 is shown as a complete structure. The integrated inductor 200 is implemented in the first conductor layer and the second conductor layer. Except for the jumper segment 222, the jumper segment 245 and the jumper segment 295, the line segments or traces of the integrated inductor 200 are all located in the first conductor layer.

[0027] like Figure 4As shown, the integrated inductor 200 is substantially symmetrical about the horizontal symmetry axis R2H and the vertical symmetry axis R2V (the horizontal symmetry axis R2H and the vertical symmetry axis R2V are substantially perpendicular to each other). Endpoints 211 and 261 are two endpoints of the integrated inductor 200, and reference numeral 202 represents a node of the integrated inductor 200. The integrated inductor 200 is similar to the integrated inductor 100, except that the two windings of the integrated inductor 200 are connected through a jumper segment 222, and the node 202 is located on the jumper segment 222. A person skilled in the art can understand the integrated inductor 200 by Figure 2A-2B In some embodiments, the terminal 261 may extend downward to facilitate signal feeding in or out; in this case, the jumper segment 222 crosses the line segment directly connected to the terminal 261, that is, the jumper segment 222 crosses one of the coils of one of the windings (the winding represented by the light gray line segment) of the integrated inductor 200.

[0028] When the integrated inductor 100 and the integrated inductor 200 are applied to a single-ended signal, the signal is not fed into or out of the node 102 and the node 202. When the integrated inductor 100 and the integrated inductor 200 are applied to a differential signal, the node 102 and the node 202 serve as the center tap of the integrated inductor 100 and the integrated inductor 200, respectively, and the center tap couples or receives the common mode voltage of the differential signal. When the integrated inductor 100 and the integrated inductor 200 are applied to a differential signal, the winding 110 forms a sub-inductor of the integrated inductor 100, and the winding 160 forms another sub-inductor of the integrated inductor 100. Similarly, the integrated inductor 200 includes two sub-inductors. Since the integrated inductor 100 and the integrated inductor 200 have excellent symmetry in structure, the two sub-inductors of the integrated inductor 100 and the integrated inductor 200 are extremely matched in electrical properties. Figure 5 : is the relationship between the inductance values ​​of the two sub-inductors and the frequency. In the frequency range less than 30 GHz, the inductance values ​​of the two sub-inductors are almost equal. In other words, the two sub-inductors of the integrated inductor of the present invention are well matched.

[0029] Figures 6A-6C FIG. 4 is a structure of an integrated inductor according to another embodiment of the present invention. Fig. 6A The integrated inductor 600 is shown as a complete structure. The integrated inductor 600 is implemented in a first conductive layer and a second conductive layer in a semiconductor structure, and most of the line segments or traces of the integrated inductor 600 are located in the first conductive layer.

[0030] like Fig. 6AAs shown, the integrated inductor 600 is a highly symmetrical structure. More specifically, the integrated inductor 600 is substantially symmetrical about the horizontal symmetry axis R6H and the vertical symmetry axis R6V (the horizontal symmetry axis R6H and the vertical symmetry axis R6V are substantially perpendicular to each other). Endpoints 611 and 661 are two endpoints of the integrated inductor 600, and reference numeral 602 represents a node of the integrated inductor 600. After the signal (i.e., current) enters the integrated inductor 600 from the end point 611, it first flows through the complete winding 610 (such as Figure 6B ), passes through node 602, and then flows through the complete winding 660 (as shown in FIG. Figure 6C ), and finally leaves the integrated inductor 600 from the terminal 661. A person skilled in the art can know the detailed current path of the integrated inductor 600 from the above description of the integrated inductor 100, so it will not be repeated. In other words, the current direction 651 of the right half of the integrated inductor 600 is different from the current direction 652 of the left half of the integrated inductor 600 (one is clockwise and the other is counterclockwise).

[0031] The integrated inductor 600 can be considered to be composed of two windings: winding 610 ( Figure 6B ) and winding 660( Figure 6C ). Endpoint 611 and node 602 are two end points of winding 610, and end point 661 and node 602 are two end points of winding 660. In other words, winding 610 and winding 660 are connected through node 602. In some embodiments, the length of the line between node 602 and end point 611 is substantially equal to the length of the line between node 602 and end point 661; in other words, the total length of the line of winding 610 is substantially equal to the total length of the line of winding 660. Figure 6B and 6C As shown, because the windings 610 and 660 have substantially the same length in the first conductor layer and substantially the same length in the second conductor layer, the windings 610 and 660 are electrically quite symmetrical.

[0032] The winding 610 includes a coil 620 and a coil 630. The coil 620 and the coil 630 are connected by a cross structure 640, and the coil 620 and the coil 630 do not overlap. The current direction of the coil 620 is opposite to the current direction of the coil 630. The winding 610 is symmetrical about the horizontal symmetry axis R6H, but asymmetrical about the vertical symmetry axis R6V. The horizontal symmetry axis R6H overlaps with the coil 620 and the coil 630, but the vertical symmetry axis R6V does not overlap with the coil 620 and the coil 630.

[0033] The winding 660 includes a coil 670 and a coil 680. The coil 670 and the coil 680 are connected by a cross structure 690, and the coil 670 and the coil 680 do not overlap. The current direction of the coil 670 is opposite to the current direction of the coil 680. The current direction of the coil 670 is the same as the current direction of the coil 620, and the current direction of the coil 680 is the same as the current direction of the coil 630. The winding 660 is symmetrical about the horizontal symmetry axis R6H, but asymmetrical about the vertical symmetry axis R6V. The horizontal symmetry axis R6H overlaps with the coil 670 and the coil 680, but the vertical symmetry axis R6V does not overlap with the coil 670 and the coil 680.

[0034] Please also refer to Fig. 6A , Figure 6B and Figure 6C , the coil 620 and the coil 670 have an overlapping range and the coil 670 surrounds the coil 620, and the coil 630 and the coil 680 have an overlapping range and the coil 630 surrounds the coil 680. In other words, the area surrounded by the coil 620 (e.g., the area of ​​the approximately dotted line frame 625) overlaps with the area surrounded by the coil 670 (e.g., the area of ​​the approximately dotted line frame 675). Similarly, the area surrounded by the coil 630 overlaps with the area surrounded by the coil 680. The coil 620, the coil 630, the coil 670, and the coil 680 are all two-turn structures, so that the integrated inductor 600 is a structure of four turns on the left and right (relative to the vertical symmetry axis R6V). In other embodiments, the coil 620, the coil 630, the coil 670, and the coil 680 can each be an even number of turns such as four turns, six turns, eight turns, etc., and those skilled in the art can understand the implementation changes based on the above disclosure, so the embodiments of more turns will not be repeated.

[0035] Please also refer to Fig. 6A , Figure 6B and Figure 6C , the coil 630 includes a first sub-coil (i.e., an outer circle, formed by the line segments outside the dotted frame 635) and a second sub-coil (i.e., an inner circle, formed by the line segments inside the dotted frame 635), and the coil 680 includes a third sub-coil (i.e., an outer circle, formed by the line segments outside the dotted frame 685) and a fourth sub-coil (i.e., an inner circle, formed by the line segments inside the dotted frame 685), and the first sub-coil, the second sub-coil, the third sub-coil, and the fourth sub-coil are arranged in sequence from the outside to the inside. In other words, the outer circle of the coil 680 is surrounded by the inner circle of the coil 630. Similarly, the outer circle of the coil 620 is surrounded by the inner circle of the coil 670.

[0036] like Figure 6B and 6C As shown, the outer circle and the inner circle of coil 620 are substantially equal in size to the outer circle and the inner circle of coil 680 , respectively, and the outer circle and the inner circle of coil 630 are substantially equal in size to the outer circle and the inner circle of coil 670 , respectively.

[0037] like Fig. 6A As shown, the terminals 611, 661 and the node 602 are located on the same side of the integrated inductor 600 (ie, below the horizontal symmetry axis R6H), and the node 602 is located between the terminals 611 and 661. Furthermore, the terminals 611 and 661 are located on different sides of the vertical symmetry axis R6V.

[0038] The through structure on the terminal 661 is used for feeding in or feeding out signals (i.e., current). In other embodiments, the through structure can also be implemented on the terminal 611 to improve the electrical symmetry of the winding 610 and the winding 660. For details of the implementation, please refer to Figure 3 and related instructions.

[0039] Figures 7A-7C FIG. 4 is a structure of an integrated inductor according to another embodiment of the present invention. Fig. 7A The complete structure of the integrated inductor 700 is shown. The integrated inductor 700 is implemented in the first conductive layer and the second conductive layer in the semiconductor structure, and most of the line segments or traces of the integrated inductor 700 are located in the first conductive layer.

[0040] like Fig. 7A As shown, the integrated inductor 700 is a highly symmetrical structure. More specifically, the integrated inductor 700 is substantially symmetrical about the horizontal symmetry axis R7H and the vertical symmetry axis R7V (the horizontal symmetry axis R7H and the vertical symmetry axis R7V are substantially perpendicular to each other). Endpoints 711 and 761 are two endpoints of the integrated inductor 700, and reference numeral 702 represents a node of the integrated inductor 700. After the signal (i.e., current) enters the integrated inductor 700 from the end point 711, it first flows through the complete winding 710 (such as Figure 7B ), passes through node 702, and then flows through the complete winding 760 (as shown in FIG. Figure 7C ), and finally leaves the integrated inductor 700 from the terminal 761. A person skilled in the art can know the detailed current path of the integrated inductor 700 from the above description of the integrated inductor 100, so it will not be repeated. In other words, the current direction 751 of the right half of the integrated inductor 700 is different from the current direction 752 of the left half of the integrated inductor 700 (one is clockwise and the other is counterclockwise).

[0041] The integrated inductor 700 can be considered to be composed of two windings: winding 710 ( Figure 7B ) and winding 760( Figure 7C). Endpoint 711 and node 702 are two end points of winding 710, and end point 761 and node 702 are two end points of winding 760. In other words, winding 710 and winding 760 are connected through node 702. In some embodiments, the length of the line between node 702 and end point 711 is substantially equal to the length of the line between node 702 and end point 761; in other words, the total length of the line of winding 710 is substantially equal to the total length of the line of winding 760. Figure 7B and 7C As shown, because the windings 710 and 760 have substantially the same length in the first conductor layer and substantially the same length in the second conductor layer, the windings 710 and 760 are electrically quite symmetrical.

[0042] The winding 710 includes a coil 720 and a coil 730. The coil 720 and the coil 730 are connected by a cross structure 740, and the coil 720 and the coil 730 do not overlap. The current direction of the coil 720 is opposite to the current direction of the coil 730. The winding 710 is symmetrical about the horizontal symmetry axis R7H, but asymmetrical about the vertical symmetry axis R7V. The horizontal symmetry axis R7H overlaps with the coil 720 and the coil 730, but the vertical symmetry axis R7V does not overlap with the coil 720 and the coil 730.

[0043] The winding 760 includes a coil 770 and a coil 780. The coil 770 and the coil 780 are connected by a cross structure 790, and the coil 770 and the coil 780 do not overlap. The current direction of the coil 770 is opposite to the current direction of the coil 780. The current direction of the coil 770 is the same as the current direction of the coil 720, and the current direction of the coil 780 is the same as the current direction of the coil 730. The winding 760 is symmetrical about the horizontal symmetry axis R7H, but asymmetrical about the vertical symmetry axis R7V. The horizontal symmetry axis R7H overlaps with the coil 770 and the coil 780, but the vertical symmetry axis R7V does not overlap with the coil 770 and the coil 780.

[0044] Please also refer to Fig. 7A , Figure 7B and Figure 7C, the coil 720 and the coil 770 have an overlapping range and the coil 770 surrounds the coil 720, and the coil 730 and the coil 780 have an overlapping range and the coil 730 surrounds the coil 780. In other words, the area surrounded by the coil 720 (e.g., the area of ​​the approximately dotted line frame 725) overlaps with the area surrounded by the coil 770 (e.g., the area of ​​the approximately dotted line frame 775). Similarly, the area surrounded by the coil 730 overlaps with the area surrounded by the coil 780. The coil 720, the coil 730, the coil 770, and the coil 780 are all two-turn structures, so that the integrated inductor 700 is a structure of four turns on the left and right (relative to the vertical symmetry axis R7V). In other embodiments, the coil 720, the coil 730, the coil 770, and the coil 780 can each be an even number of turns such as four turns, six turns, eight turns, etc., and those skilled in the art can understand the implementation changes based on the above disclosure, so the embodiments of more turns will not be repeated.

[0045] Please also refer to Fig. 7A , Figure 7B and Figure 7C , coil 730 includes a first sub-coil (i.e., an outer circle, formed by the line segments outside the dotted frame 735) and a second sub-coil (i.e., an inner circle, formed by the line segments inside the dotted frame 735), coil 780 includes a third sub-coil (i.e., an outer circle, formed by the line segments outside the dotted frame 785) and a fourth sub-coil (i.e., an inner circle, formed by the line segments inside the dotted frame 785), and the first sub-coil, the third sub-coil, the second sub-coil, and the fourth sub-coil are arranged in sequence from the outside to the inside. In other words, the sub-coils of coil 730 are interlaced with the sub-coils of coil 780. Similarly, the sub-coils of coil 720 are interlaced with the sub-coils of coil 770.

[0046] like Figure 7B and 7C As shown, the outer circle and the inner circle of coil 720 are substantially equal in size to the outer circle and the inner circle of coil 780 , respectively, and the outer circle and the inner circle of coil 730 are substantially equal in size to the outer circle and the inner circle of coil 770 , respectively.

[0047] like Fig. 7A As shown, the terminals 711, 761 and node 702 are located on the same side of the integrated inductor 700 (ie, below the horizontal symmetry axis R7H), and the node 702 is located between the terminals 711 and 761. Furthermore, the terminals 711 and 761 are located on different sides of the vertical symmetry axis R7V.

[0048] The through structure on the terminal 761 is used for feeding in or feeding out signals (i.e., current). In other embodiments, the through structure can also be implemented on the terminal 711 to enhance the electrical symmetry of the winding 710 and the winding 760. For details of the implementation, please refer to Figure 3 and related instructions.

[0049] Although the coils in the aforementioned embodiments are in the shape of a quadrilateral, this is not a limitation of the present invention, and the coils may also be in the shape of other polygons or circles.

[0050] Since those with ordinary knowledge in the art can understand the implementation details and variations of the method invention of the present invention through the disclosure of the device invention of the present invention, in order to avoid redundancy, repeated descriptions are omitted here without affecting the disclosure requirements and feasibility of the method invention. Please note that the shapes, sizes and proportions of the components in the above-mentioned figures are only for illustration and are provided for those with ordinary knowledge in the art to understand the present invention, and are not intended to limit the present invention.

[0051] Although the embodiments of the present invention are described above, these embodiments are not intended to limit the present invention. A person having ordinary knowledge in the technical field may make changes to the technical features of the present invention according to the explicit or implicit contents of the present invention. All these changes may fall within the scope of patent protection sought by the present invention. In other words, the scope of patent protection of the present invention shall be subject to the scope of the patent application defined in this specification.

[0052] Explanation of symbols

[0053] 100, 200, 600, 700 integrated inductors

[0054] 145, 195, 222, 245, 295 jumper section

[0055] 111, 161, 211, 261, 611, 661, 711, 761 endpoints

[0056] 102, 202, 602, 702 nodes

[0057] 151, 152, 651, 652, 751, 752 Current direction

[0058] 110, 160, 610, 660, 710, 760 winding

[0059] 120, 130, 170, 180, 620, 630, 670, 680, 720, 730, 770, 780 coils

[0060] 140, 190, 640, 690, 740, 790 cross structure

[0061] 125, 175, 625, 675, 635, 685, 725, 775, 735, 785 dotted line frame

[0062] 112, 162 Extended line segment

[0063] R1H, R2H, R6H, R7H horizontal symmetry axis

[0064] R1V, R2V, R6V, R7V vertical symmetry axis

Claims

1. An integrated inductor having a first terminal, a second terminal and a node, the integrated inductor comprising: a first winding having the first end point and the node as two end points and comprising a first coil and a second coil, wherein the first coil and the second coil do not overlap; and a second winding, having the second end point and the node as two end points, and comprising a third coil and a fourth coil, wherein the third coil and the fourth coil do not overlap; wherein the first coil and the third coil have an overlapping range, and the second coil and the fourth coil have an overlapping range; wherein the integrated inductor is symmetrical about an axis of symmetry, the axis of symmetry does not overlap with the first coil, the second coil, the third coil, and the fourth coil, and the first endpoint and the second endpoint are located on different sides of the axis of symmetry; wherein the first coil is surrounded by the third coil, and the fourth coil is surrounded by the second coil; The first coil and the second coil are connected via a first cross structure, and the third coil and the fourth coil are connected via a second cross structure; The symmetry axis is a first symmetry axis, the first winding is symmetric to a second symmetry axis, the second winding is symmetric to the second symmetry axis, and the first symmetry axis and the second symmetry axis are perpendicular to each other.

2. The integrated inductor according to claim 1, further comprising: An extended line segment connects the first end points and crosses the first coil or the second coil.

3. The integrated inductor according to claim 1, further comprising: A jumper segment connects the first winding and the second winding through a penetrating structure, and the node is located at the jumper segment. 4 . The integrated inductor according to claim 1 , wherein the first terminal, the second terminal, and the node are located on a same side of the integrated inductor, and the node is located between the first terminal and the second terminal. 5 . The integrated inductor according to claim 1 , wherein the first coil, the second coil, the third coil, and the fourth coil are even-numbered coils.

6. The integrated inductor according to claim 1, wherein the first coil has a first sub-coil and a second sub-coil, the third coil has a third sub-coil and a fourth sub-coil, and the first sub-coil and the second sub-coil are surrounded by the third sub-coil and the fourth sub-coil.

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