Inductance element and electronic equipment
By staggering the ends of the extension segments on the inner electrode layer of the inductor element to form a spiral coil structure, the problem of insufficient effective coil area of the inner electrode is solved, the inductance is increased, short circuits are avoided, and the performance of the inductor element is improved.
Patent Information
- Application Number
- CN202510860109.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-25
- Publication Date
- 2025-09-16
Smart Images
Figure CN120656831A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of inductor components, and in particular to an inductor component and an electronic device. Background Art
[0002] Inductors are constructed by stacking multiple internal electrode layers, each with internal electrodes positioned on top of the other. Current internal electrode pattern design flaws result in a low effective coil area for the internal electrodes. Because the inductance of an inductor is directly proportional to the effective coil area of the internal electrodes, a lower effective coil area results in a lower inductor inductance. Summary of the Invention
[0003] The embodiments of the present application disclose an inductor element and an electronic device, which can increase the effective area of an inner electrode, thereby increasing the inductance of the inductor element.
[0004] To achieve the above objectives, in a first aspect, embodiments of the present application disclose an inductor component, comprising a plurality of stacked internal electrode layers, each of the internal electrode layers comprising:
[0005] Insulation layer; and
[0006] an inner electrode, disposed on the insulating sublayer, the inner electrode comprising:
[0007] a ring-shaped electrode body, wherein two ends of the electrode body are spaced apart in a first direction and are located on the same side of the insulating sublayer in a second direction; and
[0008] Two extension segments, each extending from one end of the electrode body, the two extension segments extending along the first direction and close to each other, and the ends of the two extension segments staggered in the first direction and the second direction, the second direction intersecting the first direction;
[0009] In the stacking direction of the internal electrode layers, one of any two adjacent internal electrodes is a first internal electrode and the other is a second internal electrode; in the first internal electrode, the orthographic projections of the two extending segments in the second direction partially overlap; and in the second internal electrode, the orthographic projections of the two extending segments in the second direction are staggered;
[0010] An end of one of the extending segments of the first inner electrode is electrically connected to an end of one of the extending segments of the second inner electrode to conduct electricity between the first inner electrode and the second inner electrode.
[0011] In a possible implementation of the first aspect, a connecting portion is provided at the end of the extension segment, a dimension of the connecting portion in the second direction is D1, and a width of the extension segment in the second direction is W1, satisfying the following relationship: D1>W1.
[0012] In a possible implementation of the first aspect, on each of the inner electrode layers, one of the two connecting portions is an inner connecting portion and the other is an outer connecting portion, and the outer connecting portion is located outside the inner connecting portion in the second direction;
[0013] In the stacking direction of the internal electrode layers, the orthographic projections of the outer connecting portions on the internal electrode layers at least partially overlap, and the orthographic projections of the inner connecting portions on the internal electrode layers at least partially overlap;
[0014] In the second direction, at least one of the outer connecting portions and / or at least one of the inner connecting portions is / are eccentrically arranged relative to the connected extension segments.
[0015] In a possible implementation of the first aspect, in the first inner electrode, in the second direction, the center of the inner connecting portion is located outside the center of the connected extending segment;
[0016] In the second inner electrode, in the second direction, the center of the inner connecting portion is located inside the center of the connected extending segment.
[0017] In a possible implementation manner of the first aspect, in the second direction, the center of the outer connecting portion is located inside the center of the connected extending segment.
[0018] In a possible implementation of the first aspect, in the second direction, a distance between a center of the outer connecting portion and a center of the extension segment is D2, satisfying the following relationship: 0<D2≤0.5×(D1-W1); and / or,
[0019] In the second direction, the distance between the center of the inner connecting portion and the center of the extension section is D3, which satisfies the following relationship: 0<D3≤0.5×(D1-W1); and / or,
[0020] The dimension of the connecting portion in the first direction is D4, and the dimension of the inner ring of the electrode body in the first direction is D5; in the first direction, the distance between the center of the outer connecting portion and the center of the inner connecting portion is D6, satisfying the following relationship: 0.5×D4≤D6≤0.5×(D5 + W1); and / or,
[0021] D1 / W1=1.1~2.5.
[0022] In a possible implementation of the first aspect, the outer connecting portion on the Nth inner electrode layer is electrically connected to the outer connecting portion on the N+1th inner electrode layer, and the inner connecting portion on the N+1th inner electrode layer is electrically connected to the inner connecting portion on the N+2th inner electrode layer, where N is a positive integer;
[0023] And / or, a conducting portion is provided on the insulating sublayer, the conducting portion penetrates the insulating sublayer along the stacking direction of the inner electrode layer, and the two connected connection portions are electrically connected via the conducting portion.
[0024] In a possible implementation of the first aspect, the electrode body is extended along an edge of the insulating sublayer;
[0025] The electrode body includes a first electrode segment, a second electrode segment and a third electrode segment;
[0026] The first electrode segment and the second electrode segment both extend along the second direction and are arranged opposite to each other in the first direction; the third electrode segment extends along the first direction, and two ends of the third electrode segment are respectively connected to the same end of the first electrode segment and the second electrode segment in the second direction; one of the extension segments is connected to an end of the first electrode segment away from the third electrode segment, and the other extension segment is connected to an end of the second electrode segment away from the third electrode segment;
[0027] The first direction is perpendicular to the second direction.
[0028] In a possible implementation of the first aspect, in the second inner electrode, the orthographic projections of the two extending segments in the first direction at least partially overlap; or, the orthographic projections of the two extending segments in the first direction are staggered.
[0029] In a possible implementation of the first aspect, when the orthographic projections of the two extending segments in the first direction at least partially overlap, one of the extending segments includes:
[0030] a first extending subsegment connected to one end of the electrode body and extending along the first direction; and
[0031] The second extension sub-segment is connected to the end of the first extension sub-segment and extends to the inner side of the first extension sub-segment along the second direction, and the connecting portion is provided at the end of the second extension sub-segment.
[0032] In a second aspect, an embodiment of the present application discloses an electronic device, which includes the inductor element as described in the first aspect.
[0033] Compared with the prior art, the present invention has the following advantages:
[0034] The inductor component of the present application staggers the ends of two extension segments on the same inner electrode layer in both the first and second directions, allowing one end of the electrode body to be extended as much as possible in the second direction. This results in a larger effective coil area, which is beneficial for increasing the inductance of the inductor component. Furthermore, in two adjacent inner electrode layers, the first inner electrode is wound slightly more than one turn, while the second inner electrode is wound slightly less than one turn. When the first and second inner electrodes are electrically connected, they form a coil with two turns, or nearly two turns, facilitating the formation of a complete coil structure.
[0035] Specifically, the electrode body is ring-shaped, with both ends of the electrode body spaced apart in a first direction and located on the same side of the insulating sub-layer in a second direction. Extension segments extend from each end of the electrode body, both extending in the first direction and approaching each other (i.e., one end of the extension segment extends from the electrode body, and the other end of the extension segment extends in the first direction). In this way, the two extension segments extend the electrode body, allowing the inner electrodes to form or nearly form a complete coil pattern. When the inner electrodes on the multiple inner electrode layers are conductive, a spiral coil structure is formed along the stacking direction, thereby realizing an inductor function.
[0036] Considering that if the ends of two extension segments of the same inner electrode come into contact, a short circuit may occur, affecting the performance of the inductor component. Therefore, the ends of the two extension segments need to be staggered in the second direction to prevent contact and short circuiting between the ends of the two extension segments. Research has shown that the ends of the two extension segments need to be separated by a certain distance to avoid short circuiting. Based on this, the ends of the two extension segments are further staggered in the first direction. In this way, by further staggering, the ends of the two extension segments are further separated from each other, increasing the process margin for the spacing between the extension segments and increasing the room for adjusting the position of the extension segments. At least one extension segment can be as close as possible to the edge of the insulating sub-layer in the second direction. By adjusting the position of the extension segment, the section of the electrode body connected to the extension segment can be extended as much as possible in the second direction. Since the effective coil area of the inner electrode is proportional to the size of the electrode body, a longer section of the electrode body provides the inner electrode with a larger effective coil area, which is beneficial for improving the inductance of the inductor component.
[0037] On this basis, one of any two adjacent inner electrodes is the first inner electrode and the other is the second inner electrode; in the first inner electrode, the orthographic projections of the two extended segments in the second direction partially overlap. In other words, the first inner electrode is wound slightly more than one turn. In the second inner electrode, the orthographic projections of the two extended segments in the second direction are staggered, in other words, the second inner electrode is wound slightly less than one turn. When the first and second inner electrodes are electrically connected, they can form exactly two turns, or nearly two turns, of the coil, facilitating the formation of a complete coil structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0039] Figure 1 Schematic diagram of the structure of an inductor element;
[0040] Figure 2 Schematic diagram of the structure of an inner electrode layer;
[0041] Figure 3 A schematic structural diagram of an inductor element disclosed in an embodiment of the present application;
[0042] Figure 4 This is an exploded view of an inductor element disclosed in an embodiment of the present application;
[0043] Figure 5 A schematic diagram of the structure of two adjacent inner electrode layers disclosed in an embodiment of the present application;
[0044] Figure 6 This is a schematic structural diagram of the first inner electrode disclosed in an embodiment of the present application;
[0045] Figure 7 This is a schematic structural diagram of the second inner electrode disclosed in an embodiment of the present application;
[0046] Figure 8 A cross-sectional view of an insulating sublayer disclosed in an embodiment of the present application;
[0047] Figure 9 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application.
[0048] Description of reference numerals:
[0049] 1. Inductor element; 10. Inner electrode layer; 11. Insulator layer; 111. Conducting portion; 12. Inner electrode; 12a. First inner electrode; 12b. Second inner electrode; 121. Electrode body; 1211. First electrode segment; 1212. Second electrode segment; 1213. Third electrode segment; 122. Extension segment; 1221. First extension sub-segment; 1222. Second extension sub-segment; 123. Connecting portion; 123a. Inner connecting portion; 123b. Outer connecting portion; 124. Starting end; 125. Ending end; 20. Lead-out electrode layer; Y. First direction; X. Second direction; Z. Stacking direction of the inner electrode layers. DETAILED DESCRIPTION
[0050] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0051] In this application, terms such as "upper," "left," "right," "inner," and "outer" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to specific positions, or to their construction or operation in a specific position.
[0052] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0053] Furthermore, the terms "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0054] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.
[0055] Please also refer to Figure 1 and Figure 2 The inductor element 1 is constructed by stacking multiple internal electrode layers 10, each of which is provided with an internal electrode 12. To achieve a larger effective coil area, the internal electrode 12 can be a full-turn coil structure. However, this also results in the starting end 124 and the ending end 125 of the internal electrode 12 being located on the same side of the internal electrode layer 10.
[0056] To prevent contact between the starting end 124 and the ending end 125, which could cause a short circuit, the inventors discovered that the starting end 124 and the ending end 125 can be separated, thereby avoiding the risk of short circuits. Specifically, the starting end 124 and the ending end 125 extend in a first direction Y, allowing the starting end 124 and the ending end 125 to be spaced apart in a second direction X to prevent short circuits. Furthermore, the orthographic projections of the starting end 124 and the ending end 125 in the second direction X overlap, ensuring that the inner electrode 12 forms a complete circle.
[0057] Considering that the starting end 124 and the end end 125 of the inner electrode 12 are generally made of metal, such as silver, if the starting end 124 and the end end 125 are set too close, a short circuit may still occur between the starting end 124 and the end end 125 due to silver migration. Therefore, the starting end 124 and the end end 125 must not only be spaced apart, but the spacing must also be no less than a specific spacing value D7, such as 30μm. However, the specific spacing value D7 is large, that is, the spacing between the starting end 124 and the end end 125 is large, which in turn causes one side of the inner electrode 12 to need to be shortened, the effective coil area of the inner electrode 12 is not maximized, and the inductance value of the inductor element 1 is reduced. Furthermore, considering that the inner electrode 12 needs to be maintained in one circle, it is difficult to increase the spacing between the starting end 124 and the end end 125 by staggering them in the first direction Y.
[0058] The technical solution of the present invention will be described below with reference to embodiments and drawings.
[0059] First, please refer to Figures 3 and 4 , an embodiment of the present application discloses an inductor element 1, comprising a plurality of stacked internal electrode layers 10.
[0060] Each internal electrode layer 10 includes an insulating sublayer 11 and an internal electrode 12 . The internal electrode 12 is disposed on the insulating sublayer 11 and includes a ring-shaped electrode body 121 and two extending sections 122 .
[0061] Two ends of the electrode body 121 are spaced apart in the first direction Y and are located on the same side of the insulating sublayer 11 in the second direction X.
[0062] Extension sections 122 extend from both ends of the electrode body 121 . The two extension sections 122 extend along the first direction Y and are close to each other. The ends of the two extension sections 122 are staggered in the first direction Y and the second direction X, and the second direction X intersects the first direction Y.
[0063] In the stacking direction Z of the internal electrode layers, one of any two adjacent internal electrodes 12 is a first internal electrode 12 a and the other is a second internal electrode 12 b .
[0064] In the first internal electrode 12 a , orthographic projections of the two extending segments 122 in the second direction X partially overlap.
[0065] In the second internal electrode 12 b , the orthographic projections of the two extending segments 122 in the second direction X are staggered.
[0066] An end of one of the extending segments 122 in the first inner electrode 12 a is electrically connected to an end of one of the extending segments 122 in the second inner electrode 12 b , so as to conduct electricity between the first inner electrode 12 a and the second inner electrode 12 b .
[0067] The beneficial effects of the inductor element 1 of the present application are described below.
[0068] The inductor element 1 of the present application staggers the ends of the two extension segments on the same inner electrode layer 10 in both the first direction Y and the second direction X, allowing one end of the electrode body 121 to be extended as much as possible in the second direction X. This results in a larger effective coil area, which is beneficial for increasing the inductance of the inductor element 1. Furthermore, in two adjacent inner electrode layers 10, the first inner electrode 12a is wound slightly more than one turn, while the second inner electrode 12b is wound slightly less than one turn. When the first and second inner electrodes 12a and 12b are electrically connected, they form exactly two turns, or nearly two turns, of the coil, which facilitates the stacking of the inner electrode layers 10.
[0069] Specifically, the electrode body 121 is ring-shaped, and the two ends of the electrode body 121 are spaced apart in the first direction Y and located on the same side of the insulating sub-layer 11 in the second direction X. Extension segments 122 extend from each end of the electrode body 121, and both extension segments 122 extend along the first direction Y and are close to each other (i.e., one end of the extension segment 122 extends from the electrode body 121, and the other end of the extension segment 122 extends along the first direction Y). In this way, the two extension segments 122 serve to extend the electrode body 121, so that the inner electrode 12 forms or nearly forms a complete coil pattern. When the inner electrodes 12 on the multi-layer inner electrode layer 10 are conductive, a spiral coil structure is formed to achieve an inductor function.
[0070] Considering that if the ends of the two extension segments 122 of the same inner electrode 12 come into contact, a short circuit may occur, thereby affecting the performance of the inductor element 1. Therefore, the ends of the two extension segments 122 need to be staggered in the second direction X to prevent contact and short circuiting between the ends of the two extension segments 122. Research has shown that the ends of the two extension segments 122 need to be separated by a certain distance to avoid short circuits. Based on this, the ends of the two extension segments 122 are further staggered in the first direction Y. In this way, by further staggering, the ends of the two extension segments 122 are further separated from each other, increasing the process margin for the spacing between the extension segments 122 and increasing the space for adjusting the position of the extension segments 122. At least one extension section 122 can be as close as possible to the edge of the insulating sub-layer 11 in the second direction X. By adjusting the position of the extension section 122, the section of the electrode body 121 connected to the extension section 122 can be extended as much as possible in the second direction X. Since the effective coil area of the inner electrode 12 is proportional to the size of the electrode body 121, one section of the electrode body 121 becomes longer, so that the inner electrode 12 obtains a larger effective coil area, which is beneficial to improving the inductance of the inductor element 1.
[0071] On this basis, one of any two adjacent inner electrodes 12 is a first inner electrode 12a and the other is a second inner electrode 12b. In the first inner electrode 12a, the orthographic projections of the two extension segments 122 in the second direction X partially overlap. In other words, the first inner electrode 12a is wound slightly more than one turn. In the second inner electrode 12b, the orthographic projections of the two extension segments 122 in the second direction X are staggered. In other words, the second inner electrode 12b is wound slightly less than one turn. When conductively connected, the first and second inner electrodes 12a, 12b, form a two-turn coil, or nearly two turns, facilitating the formation of a complete coil structure.
[0072] It should be noted that the extension section 122 extending along the first direction Y means that the extension section 122 only needs to protrude from the electrode body 121 along the first direction Y, and the extension section 122 is not required to be a straight line parallel to the first direction Y. In other words, the extension section 122 can be straight, curved, or even a broken line, and this embodiment of the present application is not limited to this. The width of the extension section 122 is generally consistent with the width of the electrode body 121. Of course, the width of the extension section 122 can be different from the width of the electrode body 121.
[0073] The structure of the inductor element of the present application is further described below.
[0074] In some embodiments, reference back Figure 3 and Figure 4The inductor element 1 also includes two lead electrode layers 20. In the stacking direction Z of the internal electrode layer, each lead electrode layer 20 is stacked on each end of the internal electrode layer 10 stack. The internal electrodes 12 located at each end of the internal electrode layer 10 stack are electrically connected to each lead electrode layer 20, and the internal electrodes 12 are connected to the external circuit through the lead electrode layers 20.
[0075] The internal electrode of the present application is described in detail below.
[0076] Please also refer to Figure 4 and Figure 7 In some embodiments, a connection portion 123 is provided at the end of the extension section 122. Considering that in the stacking direction Z of the internal electrode layer, the orthographic projections of the connection portions 123 on the two internal electrode layers 10 need to at least partially overlap, so that the connection portions 123 can be aligned to achieve connection and conduction. It is understandable that during the printing process of the internal electrode 12 and the stacking process of the internal electrode layer 10, the connection portions 123 on the two internal electrode layers 10 may be offset. If the size of the connection portion 123 is small, the orthographic projection area of the connection portion 123 in the stacking direction Z of the internal electrode layer will be small and difficult to overlap. It is difficult to align the connection portions 123 on the two internal electrode layers 10. The connection portions 123 are prone to alignment failure due to printing offset or stacking offset, which in turn causes the connection portion 123 to be open, affecting the reliability of the connection portion 123.
[0077] Based on the above analysis, in the embodiment of the present application, the dimension of the connecting portion 123 in the second direction X is D1, and the width of the extending section 122 in the second direction X is W1, satisfying the following relationship: D1>W1.
[0078] In short, the size of the connection part 123 is larger, and the positive projection area of the connection part 123 in the stacking direction Z of the internal electrode layer is larger and easier to overlap. The connection parts 123 on the two internal electrode layers 10 are easier to align, thereby improving the connection success rate of the connection part 123, avoiding the situation where the upper and lower connection parts 123 are open due to deviations during printing and lamination, and improving the reliability of the connection part 123.
[0079] Optionally, D1 / W1=1.1-2.5. When D1 / W1 satisfies the above ratio range, the size of the connection portion 123 is sufficiently large so that the orthographic projection area of the connection portion 123 in the stacking direction Z of the internal electrode layers is sufficiently large, thereby further reducing the difficulty of aligning the connection portion 123 and further improving the connection success rate of the connection portion 123. When the size of the connection portion 123 is not too large, it is beneficial to maintain a certain distance between the connection portion 123 and other parts of the internal electrode 12, thereby preventing short circuits.
[0080] Optionally, the shape of the connection portion 123 may be circular, polygonal, or elliptical. The connection portion 123 is used to connect the internal electrodes 12 to each other, or to connect the internal electrode 12 to the lead-out electrode layer 20 .
[0081] In the embodiment of the present application, on each inner electrode layer 10, one of the two connecting portions 123 is an inner connecting portion 123a and the other is an outer connecting portion 123b, and the outer connecting portion 123b is located outside the inner connecting portion 123a in the second direction X. Figure 5 、 Figure 6 and Figure 7 In Chinese, the inner side refers to the side close to the right, and the outer side refers to the side close to the left.
[0082] Furthermore, in the stacking direction Z of the internal electrode layers, the orthographic projections of the outer connecting portions 123 b on each internal electrode layer 10 at least partially overlap, and the orthographic projections of the inner connecting portions 123 a on each internal electrode layer 10 at least partially overlap.
[0083] Specifically, the outer connecting portion 123b on the Nth inner electrode layer 10 is electrically connected to the outer connecting portion 123b on the N+1th inner electrode layer 10, and the inner connecting portion 123a on the N+1th inner electrode layer 10 is electrically connected to the inner connecting portion 123a on the N+2th inner electrode layer 10, where N is a positive integer, such as 1, 2, or 3. In this way, the multiple inner electrode layers 10 are sequentially connected to form a spiral coil structure, forming a stacked inductor. That is, the inductor element 1 is a stacked inductor element 1.
[0084] In some embodiments, please refer to Figure 6 and Figure 7 In the second direction X, at least one outer connecting portion 123b and / or at least one inner connecting portion 123a are eccentrically disposed relative to the connected extension segment 122. In this application, the term "eccentrically disposed" means that, in the second direction X, the center of the outer connecting portion 123b and the center of the inner connecting portion 123a are offset inwardly or outwardly relative to the center of the extension segment 122 to which they are directly connected. In this application, the center of the inner connecting portion 123a, the center of the outer connecting portion 123b, and the center of the extension segment 122 all refer to their respective centers in the second direction X. When the inner connecting portion 123a and the outer connecting portion 123b are circular, the center specifically refers to the center of the circle.
[0085] In this way, the outer connecting portion 123b and / or the inner connecting portion 123a can be adjusted to a more suitable position by eccentric setting, so that the extension section 122 is as close as possible to the edge of the insulating layer 11, thereby extending the local length of the electrode body 121, which is beneficial for the electrode body 121 to obtain a larger effective coil area.
[0086] Further, see Figure 6 (B) and Figure 7 (A) In the first inner electrode 12 a , in the second direction X, the center of the inner connecting portion 123 a is located outside the center of the connected extending section 122 .
[0087] Specifically, in Figure 6 In (B), the dotted line a3 represents the normal line of the center of the inner connecting portion 123a along the first direction Y, and the dotted line a4 represents the normal line of the center of the extension section 122 along the first direction Y. The dotted line a3 is located outside the dotted line a4. In the second inner electrode 12b, in the second direction X, the center of the inner connecting portion 123a is located inside the center of the connected extension section 122. Figure 7 In (A), the dotted line a5 represents the normal line of the center of the extension section 122 along the first direction Y, and the dotted line a6 represents the normal line of the center of the inner connecting portion 123a along the first direction Y. The dotted line a6 is located inside the dotted line a5.
[0088] In other words, the inner connecting portion 123a of the first inner electrode 12a bends outward relative to the extension section 122, which is equivalent to moving the position of the inner connecting portion 123a outward along the second direction X. Because the orthographic projections of the inner connecting portions 123a on the two inner electrode layers 10 in the stacking direction Z of the inner electrode layers overlap, the position of the inner connecting portion 123a on the second inner electrode 12b can also be moved outward accordingly. On this basis, on the second inner electrode 12b, the extension section 122 is eccentrically arranged on the outside of the inner connecting portion 123a, which is equivalent to moving the position of the extension section 122 outward along the second direction X. In this way, the end of the electrode body 121 connected to this extension section 122 moves outward in the second direction X, and the length L of the portion of the electrode body 121 connected to this extension section 122 (i.e., the second electrode section 1212) in the second direction X is longer. Since the effective coil area of the second inner electrode 12b is proportional to the size of the inner electrode 12, the local lengthening of the second inner electrode 12b can obtain a larger effective coil area, which is beneficial to improving the inductance of the inductor element 1.
[0089] It can be understood that since the outer connecting portion 123b is larger in size in the second direction X, the outer connecting portion 123b may be close to the edge of the insulating sublayer 11 in the second direction X. When the outer connecting portion 123b is printed offset in the second direction X, it is easy to exceed the edge of the insulating sublayer 11 in the second direction X.
[0090] Based on this, Figure 6 As shown in (A), in the embodiment of the present application, in the second direction X, the center of the outer connecting portion 123b is located inside the center of the connected extension section 122. Figure 6In (A), the dotted line a1 represents the normal line of the center of the extension section 122 along the first direction Y, and the dotted line a2 represents the normal line of the center of the outer connecting portion 123b along the first direction Y. The dotted line a2 is located inside the dotted line a1.
[0091] As a result, the outer connecting portion 123b bends inward relative to the connected extension section 122, moving the outer connecting portion 123b away from the edge of the insulating sub-layer 11. This prevents printing anomalies caused by the outer connecting portion 123b being too close to the edge of the insulating sub-layer 11. Furthermore, the portion of the electrode body 121 connected to the outer connecting portion 123b can be extended as much as possible in the second direction X. Since the effective coil area of the inner electrode 12 is proportional to the size of the electrode body 121, a longer end of the electrode body 121 can achieve a larger effective coil area, which is beneficial for increasing the inductance of the inductor element 1.
[0092] It is understandable that if Figure 7 As shown in FIG. 1A , for the second inner electrode 12 b , in the second direction X, the center of the outer connecting portion 123 b may also be located inside the center of the connected extending section 122 .
[0093] Reference Figure 6 (A), in the second direction X, the distance D2 between the center of the outer connecting portion 123b and the center of the extension section 122 satisfies the following relationship: 0 < D2 ≤ 0.5 × (D1 - W1). When the distance D2 between the center of the outer connecting portion 123b and the center of the extension section 122 satisfies the aforementioned spacing range, the eccentricity of the outer connecting portion 123b relative to the extension section 122 is not excessive, and the spacing between the outer connecting portion 123b and the inner connecting portion 123a remains within an appropriate range, thereby preventing a short circuit between the outer connecting portion 123b and the inner connecting portion 123a. More preferably, D2 = 0.5 × (D1 - W1).
[0094] Reference Figure 6 (B) In the second direction X, the distance D3 between the center of the inner connecting portion 123a and the center of the extension section 122 satisfies the following relationship: 0 < D3 ≤ 0.5 × (D1 - W1). When the distance D3 between the center of the inner connecting portion 123a and the center of the extension section 122 satisfies the aforementioned spacing range, the eccentricity of the inner connecting portion 123a relative to the extension section 122 is not excessive, and the spacing between the inner connecting portion 123a and the outer connecting portion 123b remains within an appropriate range, thereby preventing a short circuit between the outer connecting portion 123b and the inner connecting portion 123a. More preferably, D3 = 0.5 × (D1 - W1).
[0095] Reference Figure 6(C), the dimension of the connecting portion 123 in the first direction Y is D4, and the dimension of the inner circle of the electrode body 121 in the first direction Y is D5. In the first direction Y, the distance between the center of the outer connecting portion 123b and the center of the inner connecting portion 123a is D6, satisfying the following relationship: 0.5×D4≤D6≤0.5×(D5+W1). When the distance D6 between the center of the outer connecting portion 123b and the center of the inner connecting portion 123a satisfies this relationship, the distance between the outer connecting portion 123b and the inner connecting portion 123a is large enough to prevent short circuits between the outer connecting portion 123b and the inner connecting portion 123a, but the distance between the outer connecting portion 123b and the inner connecting portion 123a is not too large, so that the inner electrode 12 maintains a high effective coil area. More preferably, D6=D4.
[0096] In some embodiments, please refer to Figure 6 (A) and Figure 7 In (A) and (B), the electrode body 121 extends along the edge of the insulating sublayer 11. The electrode body 121 includes a first electrode segment 1211, a second electrode segment 1212 and a third electrode segment 1213.
[0097] The first electrode segment 1211 and the second electrode segment 1212 both extend along the second direction X and are arranged opposite to each other in the first direction Y. The third electrode segment 1213 extends along the first direction Y, and both ends of the third electrode segment 1213 are respectively connected to the same end of the first electrode segment 1211 and the second electrode segment 1212 in the second direction X. One of the extension segments 122 is connected to an end of the first electrode segment 1211 away from the third electrode segment 1213, and the other extension segment 122 is connected to an end of the second electrode segment 1212 away from the third electrode segment 1213.
[0098] The first direction Y is perpendicular to the second direction X. Of course, the angle between the first direction Y and the second direction X may also slightly deviate from 90°, such as 80°, 85°, 95° or 100°.
[0099] It is understood that extending the inner electrode 12 along the edge of the insulating sublayer 11 can fully utilize the surface of the insulating sublayer 11, and a sufficiently large inductance region can be formed around the inner periphery of the inner electrode 12. In the present application, the inner electrode 12 is wound in a generally rectangular shape. In this rectangular wound inner electrode 12, there is a sufficiently large spacing between the first electrode segment 1211 and the second electrode segment 1212, and between the third electrode segment 1213 and the extension segment 122, which helps reduce short circuits.
[0100] Alternatively, as Figure 7 As shown in (A), the orthographic projections of the two extension sections 122 in the first direction Y are staggered. Alternatively, as Figure 7As shown in (B), in the second inner electrode 12b, the orthographic projections of the two extending segments 122 in the first direction Y at least partially overlap.
[0101] When the orthographic projections of the two extension sections 122 in the first direction Y are staggered, it indicates that the two extension sections 122 are spaced apart, which is conducive to maintaining a suitable distance between the two extension sections 122 and thus avoiding a short circuit.
[0102] When the orthographic projections of the two extension segments 122 in the first direction Y at least partially overlap, since the extension segments 122 are connected to the ends of the electrode body, that is, the orthographic projections of the two ends of the electrode body in the first direction Y overlap, the lengths of the two sides of the electrode body in the first direction Y, namely the first electrode segment 1211 and the second electrode segment 1212, are roughly the same, and the first electrode segment 1211 and the second electrode segment 1212 are the same length, so that the effective coil area of the second inner electrode 12b is further increased, thereby further increasing the inductance of the inductor element 1.
[0103] In more detail, Figure 7 As shown in (B), when the orthographic projections of the two extension segments 122 in the first direction Y at least partially overlap, one of the extension segments 122 includes a first extension sub-segment 1221 and a second extension sub-segment 1222 .
[0104] The first extension sub-segment 1221 is connected to one end of the electrode body 121 and extends along the first direction Y. The orthographic projections of the first extension sub-segment 1221 and the other extension sub-segment 122 in the first direction Y at least partially overlap. The second extension sub-segment 1222 is connected to the end of the first extension sub-segment 1221 and extends along the second direction X to the inside of the first extension sub-segment 1221. The connecting portion 123 is provided at the end of the second extension sub-segment 1222.
[0105] In this way, the lengths of the first electrode segment 1211 and the second electrode segment 1212 are equal, and the ends of the two extension segments 122 are staggered in the first direction Y and the second direction X, so that the effective coil area of the second inner electrode 12 b is further increased, thereby further increasing the inductance of the inductor element 1.
[0106] The insulating sublayer of the present application is described in detail below.
[0107] In some embodiments, reference Figure 8 A conductive portion 111 is provided on the insulating sublayer 11. The conductive portion 111 penetrates the insulating sublayer 11 along the stacking direction Z of the inner electrode layers. Two connected connecting portions 123 are electrically connected via the conductive portion 111. As a result, the conductive portion 111 is relatively small in the stacking direction Z of the inner electrode layers. In other words, the current transmission path between the two connecting portions 123 is relatively short, effectively reducing current transmission losses between the connecting portions 123.
[0108] More specifically, the insulating sublayer 11 is laser-drilled to form a via hole, which is then filled with conductive material to form a conductive portion 111. In the stacking direction Z of the inner electrode layers, the conductive portion 111 and the orthographic projection of the connecting portion 123 coincide with each other. The connecting portions 123 on both sides of the insulating sublayer 11 are electrically connected and conductive via the conductive portion 111, simplifying the connection structure between the connecting portions 123.
[0109] Optionally, the insulating sublayer 11 is made of, for example, ceramic material, organic polymer material, or metal oxide material. The conductive portion 111 is made of, for example, silver, copper, silver-clad copper, or aluminum.
[0110] In a second aspect, the present application discloses an electronic device, referring to Figure 9 The electronic device includes the inductor element 1 as described in the first aspect. The electronic device is, for example, a mobile phone, a tablet, a computer, a smart watch, etc.
[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An inductor element, characterized in that: The device comprises a plurality of stacked internal electrode layers, each of the internal electrode layers comprising: Insulation layer; and an inner electrode, disposed on the insulating sublayer, the inner electrode comprising: a ring-shaped electrode body, wherein two ends of the electrode body are spaced apart in a first direction and are located on the same side of the insulating sublayer in a second direction; and Two extension segments, each extending from one end of the electrode body, the two extension segments extending along the first direction and close to each other, and ends of the two extension segments staggered in the first direction and the second direction, the second direction intersecting the first direction; In the stacking direction of the internal electrode layers, one of any two adjacent internal electrodes is a first internal electrode and the other is a second internal electrode; in the first internal electrode, the orthographic projections of the two extending segments in the second direction partially overlap; and in the second internal electrode, the orthographic projections of the two extending segments in the second direction are staggered; An end of one of the extending segments of the first inner electrode is electrically connected to an end of one of the extending segments of the second inner electrode to conduct electricity between the first inner electrode and the second inner electrode.
2. The inductor element according to claim 1, wherein A connecting portion is provided at the end of the extension section. The dimension of the connecting portion in the second direction is D1. The width of the extension section in the second direction is W1, which satisfies the following relationship: D1>W1.
3. The inductor element according to claim 2, wherein: On each of the inner electrode layers, one of the two connecting portions is an inner connecting portion and the other is an outer connecting portion, and the outer connecting portion is located outside the inner connecting portion in the second direction; In the stacking direction of the internal electrode layers, the orthographic projections of the outer connecting portions on the internal electrode layers at least partially overlap, and the orthographic projections of the inner connecting portions on the internal electrode layers at least partially overlap; In the second direction, at least one of the outer connecting portions and / or at least one of the inner connecting portions is / are eccentrically arranged relative to the connected extension segments.
4. The inductor element according to claim 3, wherein: In the first inner electrode, in the second direction, the center of the inner connecting portion is located outside the center of the connected extending segment; In the second inner electrode, in the second direction, the center of the inner connecting portion is located inside the center of the connected extending segment.
5. The inductor element according to claim 3, wherein: In the second direction, the center of the outer connecting portion is located inside the center of the connected extending segment.
6. The inductor element according to claim 5, wherein: In the second direction, the distance between the center of the outer connecting portion and the center of the extension section is D2, which satisfies the following relationship: 0<D2≤0.5×(D1-W1); and / or, In the second direction, the distance between the center of the inner connecting portion and the center of the extension section is D3, which satisfies the following relationship: 0<D3≤0.5×(D1-W1); and / or, The dimension of the connecting portion in the first direction is D4, and the dimension of the inner ring of the electrode body in the first direction is D5; in the first direction, the distance between the center of the outer connecting portion and the center of the inner connecting portion is D6, satisfying the following relationship: 0.5×D4≤D6≤0.5×(D5 + W1); and / or, D1 / W1=1.1~2.
5.
7. The inductor element according to any one of claims 1 to 6, characterized in that: The electrode body is extended along the edge of the insulating sublayer; The electrode body includes a first electrode segment, a second electrode segment and a third electrode segment; The first electrode segment and the second electrode segment both extend along the second direction and are arranged opposite to each other in the first direction; the third electrode segment extends along the first direction, and two ends of the third electrode segment are respectively connected to the same end of the first electrode segment and the second electrode segment in the second direction; one of the extension segments is connected to an end of the first electrode segment away from the third electrode segment, and the other extension segment is connected to an end of the second electrode segment away from the third electrode segment; The first direction is perpendicular to the second direction.
8. The inductor element according to any one of claims 2 to 6, characterized in that: In the second inner electrode, the orthographic projections of the two extending segments in the first direction at least partially overlap; or, the orthographic projections of the two extending segments in the first direction are staggered.
9. The inductor element according to claim 8, wherein: When the orthographic projections of the two extending segments in the first direction at least partially overlap, one of the extending segments comprises: a first extending subsegment connected to one end of the electrode body and extending along the first direction; and The second extension sub-segment is connected to the end of the first extension sub-segment and extends to the inner side of the first extension sub-segment along the second direction, and the connecting portion is provided at the end of the second extension sub-segment.
10. An electronic device, characterized in that: The electronic device includes the inductor element according to any one of claims 1 to 9.
Citation Information
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