CN112071554A - Inductive components - Google Patents

Abstract

The invention discloses an inductance assembly which comprises a laminated body, a filling conductor, a first external electrode and a second external electrode. The laminate includes a plurality of layers of alternately stacked insulators and pattern conductors. The laminate has opposing bottom and top surfaces, and first and second opposite side surfaces connected between the bottom and top surfaces. The filling conductors are distributed on and penetrate through the insulators. Each of the filled conductors connects two adjacent layers of the multi-layer pattern conductors to form a coiled conductor extending in a spiral shape. First and second external electrodes are formed on the first and second side surfaces, an inner edge of the first external electrode is connected to the uppermost pattern conductor, and an inner edge of the second external electrode is connected to the lowermost pattern conductor. The inner edges of the first external electrode and the second external electrode are curved surfaces.

Description

Inductive components

technical field

The invention relates to an inductance component, in particular to an inductance component at the connection position between an outer electrode and an inner conductor.

Background technique

First, the location of the connection between the outer electrode and the inner conductor in an inductive component usually affects the inductance and Q value. The Q value is the quality factor, which refers to the ratio of the inductive reactance presented by the coil (that is, the inner conductor) to the DC resistance of the coil when the coil works under an AC voltage of a certain frequency. The higher the Q of the inductor, the lower its losses and the higher the efficiency. The quality factor Q is an important parameter reflecting the quality of the coil, and improving the Q value of the coil can be said to be one of the key points to pay attention to when winding the coil.

In the prior art, the connection between the coil (inner conductor) of the inductance component and the external electrode is usually linearly connected to the external electrode in a horizontal direction, or is connected to the external electrode along the normal direction of the outer periphery of the coil. However, if it is connected in a straight line in the horizontal direction, reflection loss will occur due to vertical contact with the external electrode, resulting in a decrease in inductance value and Q value. Extending the distance too long increases the cost of coil manufacturing.

Therefore, how to further improve the connection position between the external electrode and the internal conductor in the inductor component through structural design to overcome the above-mentioned defects has become one of the important issues to be solved by this project.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an inductance component in view of the deficiencies of the prior art, which includes: a laminated body, a filling conductor, and a first external electrode and a second external electrode. The laminated body includes multiple layers of alternately stacked insulators and pattern conductors, the laminated body has opposite bottom and top surfaces, and is connected between the bottom and top surfaces and opposite first and second sides, and each layer of pattern conductors is provided Inside the laminate, and the interface of each layer of pattern conductors between two adjacent layers of insulators extends along a circumferential track. Each filled conductor is distributed in each layer of insulator, and each filled conductor penetrates each layer of insulator along the thickness direction of each layer of insulator to connect two adjacent layers of pattern conductors in the multilayer pattern conductor to form a spirally extending wound conductor. The first external electrode and the second external electrode are formed on the first side surface and the second side surface of the laminate, the inner edge of the first external electrode is connected to the pattern conductor of the uppermost layer of the multilayer pattern conductors, and the second external electrode is The inner edge is connected to the pattern conductor of the lowermost layer among the multilayer pattern conductors. The outer edge of the first external electrode is exposed on the bottom surface and the first side surface of the laminate, the outer edge of the second external electrode is exposed on the bottom surface and the second side surface of the laminate body, and the inner edge of the first external electrode and the second external electrode are exposed. for the surface.

Further, each layer of pattern conductors has a first end and a second end, and in the pattern conductors of the adjacent upper and lower layers, the second end of the pattern conductor of the upper layer and the first end of the pattern conductor of the lower layer are connected by filling conductors. connect.

Further, when the first external electrode is connected to the pattern conductor of the uppermost layer in the multilayer pattern conductor, the first end of the pattern conductor of the uppermost layer is connected to the inner part of the first external electrode along the tangential direction of the surrounding track. edge.

Further, when the second external electrode is connected to the pattern conductor of the lowermost layer in the multilayer pattern conductor, the second end of the pattern conductor of the lowermost layer is connected to the inner side of the second external electrode along the tangential direction of the surrounding track. edge.

Furthermore, the first end of the uppermost pattern conductor is connected to the inner edge of the first external electrode, and the connection between the first end of the uppermost pattern conductor and the inner edge of the first external electrode is close to the bottom surface of the laminate.

Furthermore, the second end of the lowermost pattern conductor is connected to the inner edge of the second external electrode, and the connection between the second end of the lowermost pattern conductor and the inner edge of the second external electrode is close to the bottom surface of the laminate.

Further, when the outer edge of the first external electrode is exposed on the first side surface of the laminate, the length of the exposed portion of the outer edge of the first external electrode on the first side surface is at least one third of the length of the first side surface. .

Further, when the outer edge of the second external electrode is exposed on the second side surface of the laminate, the length of the exposed portion of the outer edge of the second external electrode on the second side surface is at least one third of the length of the second side surface. .

Further, the insulator is made of ceramic material by roll-to-roll coating.

Furthermore, the insulator is made of non-photosensitive ceramic paste by printing.

Furthermore, the filling conductor is formed by perforating the insulator by a laser beam, and then injecting the photosensitive silver paste and exposing and developing.

One of the beneficial effects of the present invention is that the inductance component provided by the present invention can pass through "a laminated body comprising multiple layers of alternately stacked insulators and pattern conductors, the laminated body having opposite bottom surfaces and top surfaces, and connected to the bottom surface. and the first side and the second side opposite to the top surface", "the pattern conductors of each layer are arranged inside the laminated body, and the interface of the pattern conductors of each layer between two adjacent layers of insulators extends along the surrounding track" , "Each filled conductor is distributed in each layer of insulator, and each filled conductor penetrates through each layer of insulator along the thickness direction of each layer of insulator to connect two adjacent layers of pattern conductors in the multilayer pattern conductor, forming a spiral extending winding "Conductor", "the first external electrode and the second external electrode are formed on the first side and the second side of the laminate, and the inner edge of the first external electrode is connected to the pattern conductor of the uppermost layer of the multilayer pattern conductors. The inner edges of the two external electrodes are connected to the pattern conductor of the lowermost layer of the multilayer pattern conductors” and “The outer edges of the first external electrodes are exposed on the bottom surface and the first side surface of the laminate, and the outer edges of the second external electrodes are exposed. On the bottom surface and the second side surface of the laminated body, the inner edges of the first external electrode and the second external electrode are curved surfaces”, so as to improve the connection position of the external electrode and the internal conductor in the inductor component.

For further understanding of the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only for reference and description, not for limiting the present invention.

Description of drawings

FIG. 1 is an exploded schematic diagram of an inductor component according to a first embodiment of the present invention.

FIG. 2 is a first perspective schematic diagram of the inductor component according to the first embodiment of the present invention.

3 is a second schematic perspective view of the inductor component according to the first embodiment of the present invention.

FIG. 4 is a schematic front view of the inductor component according to the first embodiment of the present invention.

FIG. 5 is a schematic front view of an inductor component according to a second embodiment of the present invention.

Detailed ways

The following are specific embodiments to illustrate the implementation of the "inductor component" disclosed in the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention.

It should be understood that, although the terms "first", "second", "third" and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are primarily used to distinguish one element from another. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be.

[First Embodiment]

First, referring to FIG. 1 , FIG. 2 and FIG. 4 , the first embodiment of the present invention provides an inductor component 100 , which includes a laminate 1 , a plurality of filling conductors 13 , a first external electrode 31 and a second external electrode 32. As shown in FIG. 1 , the laminate 1 includes a plurality of insulators 11 and pattern conductors 12 that are alternately stacked. That is, the laminated body 1 is formed by stacking one layer of insulator 11, one layer of pattern conductor 12, one layer of insulator 11, and one layer of pattern conductor 12 . . . in this order. As shown in FIG. 2 , in the laminated body 1 formed by stacking, the pattern conductor 12 is provided inside the laminated body 1 , in other words, the insulator 11 completely covers the pattern conductor 12 . As shown in FIG. 4 , from the appearance of the laminated body 1 , the laminated body 1 has opposite bottom surfaces 111 and top surfaces 112 , and opposite first side surfaces 113 and second side surfaces 114 . The first side surface 113 and the second side surface 114 are connected between the bottom surface 111 and the top surface 112, respectively.

Specifically, each layer of pattern conductors 12 extends along a surrounding track at the interface between two adjacent layers of insulators 11 . The respective filled conductors 13 are distributed in the respective layers of the insulator 11 . Each filled conductor 13 penetrates through each layer of insulator 11 along the thickness direction of each layer of insulator 11 to connect two adjacent layers of pattern conductors 12 in the multilayer pattern conductors 12 , and further connect each layer of pattern conductors of the multilayer pattern conductors 12 12. The coiled conductor 10 extending in a spiral shape is formed.

The first external electrode 31 and the second external electrode 32 are respectively formed on the first side surface 113 and the second side surface 114 of the laminate 1 , the inner edge 312 of the first external electrode 31 and the pattern of the uppermost layer of the multilayer pattern conductor 12 The conductors 12 are connected, and the inner edge 322 of the second external electrode 32 is connected to the pattern conductor 12 of the lowermost layer among the multilayer pattern conductors 12 . The outer edge 311 of the first external electrode 31 is exposed on the bottom surface 111 and the first side surface 113 of the laminate 1 , and the outer edge 321 of the second external electrode 32 is exposed on the bottom surface 111 and the second side surface 114 of the laminate 1 . The inner edges 312 and 322 of the first external electrode 31 and the second external electrode 32 are curved surfaces. In other words, the joint surface of the first external electrode 31 and the laminated body 1 is a curved surface, and the second external electrode 32 and the laminated body are formed by a curved surface. 1 The contact surface is a curved surface. The purpose of designing the inner edges 312 and 322 as curved surfaces is to shorten the distance between the external electrodes 32 and the laminated body 1 , and reduce the manufacturing cost of the external electrodes.

It should be noted that, in the present invention, the width of the first external electrode 31 and the width of the second external electrode 32 can be changed as required. Referring to FIGS. 2 and 3 , the width of the first external electrode 31 may be smaller than the width of the first side surface 113 of the laminate 1 , and the width of the second external electrode 32 may be smaller than the width of the second side surface 114 of the laminate 1 . width (see Figure 2). Alternatively, the width of the first external electrode 31 may be equal to the width of the first side 113 of the laminate 1 , and the width of the second external electrode 32 may be equal to the width of the second side 114 of the laminate 1 ( FIG. 3 ).

In addition, when the outer edge 311 of the first external electrode 31 is exposed on the first side surface 113 of the laminate 1, the length L1 of the exposed portion of the outer edge 311 of the first external electrode 31 on the first side surface 113 is at least the first side surface 113 One third of the length L2. Similarly, when the outer edge 321 of the second external electrode 32 is exposed on the second side surface 114 of the laminate 1, the length L3 of the exposed portion of the outer edge 321 of the second external electrode 32 on the second side surface 114 is at least the second The side 114 is one third of the length L4.

Next, referring to FIG. 1 and FIG. 2 , the pattern conductors 12 of each layer will be further described. The pattern conductor 12 has a first end 121 and a second end 122 . In the adjacent upper and lower layers of pattern conductors 12 , the second end 122 of the upper layer pattern conductor 12 and the first end 121 of the lower layer pattern conductor 12 pass through the filling in the insulator 11 between the adjacent upper and lower layers of pattern conductors 12 The conductors 13 are connected.

Referring to FIG. 4 , when the first external electrode 31 is connected to the uppermost pattern conductor 12 , the first end 121 of the uppermost pattern conductor 12 is connected to the first external electrode along the tangential direction T of the surrounding track. Inner edge 312 of 31. More precisely, the first end 121 of the uppermost pattern conductor 12 is connected to the upper portion of the inner edge 312 of the first external electrode 31 along the tangential direction T of the surrounding track, that is, the inner edge 312 is formed. The part of the curved surface structure is closer to the first side surface 113 .

Likewise, when the second outer electrode 32 is connected to the lowermost pattern conductor 12, the second end 122 of the lowermost pattern conductor 12 is connected to the inner portion of the second outer electrode 32 along the tangential direction T of the surrounding track. Edge 322. More precisely, the second end 122 of the lowermost pattern conductor 12 is connected to the upper portion of the inner edge 322 of the second external electrode 32 along the tangential direction T of the surrounding track, that is, the inner edge 322 is formed. In the curved structure of , the part closer to the second side surface 114 .

Continue to refer to Figure 1, and then describe the manufacturing method of the inductor component provided by the present invention:

Step 1: Coating a layer of photoconductor material (not shown) on a continuous insulating material (not shown), and exposing the photoconductor material to form a plurality of pattern conductors 12, and each pattern conductor 12 has The first end 121 and the second end 122 . The photosensitive conductor material is mainly photosensitive silver paste, the continuous insulating material is mainly ceramic material, and more specifically, the continuous insulating material is mainly non-photosensitive ceramic paste. Continuous insulation can be made by roll-to-roll coating, or by printing.

Step 2: A laser process is performed on the continuous insulating material to form a plurality of through holes 4 penetrating the insulating material, each insulator 11 has a pattern conductor 12 and a through hole 4, and each through hole 4 and each pattern conductor 12 connected to the second end 122.

Step 3: inject the photosensitive silver paste into the through hole 4, and then form the filled conductor 13 by exposure and development.

Step 4: A plurality of insulators 11 and a plurality of pattern conductors 12 are aligned and stacked to form a continuous stacked body 1. In the process of aligning and stacking, the filling conductor 13 on one insulator 11 is connected to the first end 121 of the pattern conductor 12 on the other insulator 11 adjacently below, so that the multilayer pattern conductor 12 passes through the filling conductor 13 The coiled conductors 10 are formed by connecting them. Next, the continuous laminated body 1 is cut to form a plurality of laminated bodies 1 .

Step 5: forming two external electrodes on both sides of each laminated body 1 , namely a first external electrode 31 and a second external electrode 32 . The first external electrode 31 is connected to the first end 121 of the pattern conductor 12 in the uppermost layer of the multilayer pattern conductors 12 , and the second outer electrode 32 is connected to the second end of the pattern conductor 12 in the lowermost layer in the multilayer pattern conductor 12 The terminals 122 are connected to form the inductor assembly 100 .

In general, the inductor component 100 provided by the present invention can firstly fabricate a green tape (continuous insulating material) by a roll-to-roll coating process, and then print a photosensitive silver paste thereon to form pattern conductors 12, and pattern conductors 12 are formed on each layer of pattern conductors. After 12 are respectively completed, the stacking body 1 is formed by alignment and lamination, and finally external electrodes are formed on both sides of the stacking body 1 to form the inductor component 100 . Alternatively, a non-photosensitive ceramic paste can be printed first to form a continuous insulating material, and then a photosensitive silver paste can be printed thereon to be exposed and developed to form the pattern conductor 12 . No matter which method is adopted, the through holes 14 are formed by laser perforation, and then a photosensitive silver paste is injected into the through holes 4, and then the filled conductors 13 are formed by exposure and development.

[Second Embodiment]

Referring to FIG. 5 , the manufacturing method of the inductor component 100 in the second embodiment is the same as that shown in the first embodiment, and details are not described here. The difference between the second embodiment and the first embodiment is that the first end 121 of the uppermost pattern conductor 12 is not only connected to the inner edge 312 of the first external electrode 31 , but also the first end 121 of the uppermost pattern conductor 12 is connected to the first end 121 of the uppermost pattern conductor 12 . The connection of the inner edge 312 of an external electrode 31 is close to the bottom surface 111 of the laminate 1 . Similarly, the second end 122 of the pattern conductor 12 of the lowermost layer is connected to the inner edge 322 of the second external electrode 32 , and the second end 122 of the pattern conductor 12 of the lowermost layer is connected to the inner edge 322 of the second external electrode 32 . It is close to the bottom surface 111 of the laminated body 1 .

It should be noted that although the first embodiment and the second embodiment both connect the first end 121 of the uppermost pattern conductor 12 to the inner edge 32 of the first external electrode 31 along the tangential direction T of the surrounding track, and connect the The second end 122 of the pattern conductor 12 of the lowermost layer is connected to the inner edge 322 of the second external electrode 32 along the tangential direction T of the surrounding track. However, further comparing FIG. 4 and FIG. 5 , it can be clearly seen that in the first embodiment shown in FIG. 3 , the connection between the first end 121 of the uppermost pattern conductor 12 and the first external electrode 31 is at the first In the portion of the inner edge 312 of the external electrode 31 that is closer to the first side surface 113 of the laminate 1 , the connection between the second end 122 of the pattern conductor 12 of the lowermost layer and the second external electrode 32 is at the inner edge of the second external electrode 32 . 322 is closer to the second side surface 114 of the laminated body 1 . In the second embodiment shown in FIG. 5 , the connection between the first end 121 of the uppermost pattern conductor 12 and the first external electrode 31 is closer to the laminate 1 in the inner edge 312 of the first external electrode 31 At the bottom surface 111 of the lowermost layer, the connection between the second end 122 of the lowermost pattern conductor 12 and the second external electrode 32 is also a position closer to the bottom surface 111 of the laminate 1 in the inner edge 322 of the second external electrode 32 .

Beneficial Effects of Embodiments

One of the beneficial effects of the present invention is that the inductance component 100 provided by the present invention can be achieved by "the laminated body 1 includes multiple layers of alternately stacked insulators 11 and pattern conductors 12, and the laminated body 1 has opposite bottom surfaces 111 and top surfaces. The surface 112, and the first side surface 113 and the second side surface 114 which are connected between the bottom surface 111 and the top surface 112 and face each other, each pattern conductor 12 is provided inside the laminate 1, and each layer pattern conductor is in the adjacent two. The interface between the insulators 11 extends along the surrounding track”, “a plurality of filling conductors 13 are distributed in each layer of insulator 11, and each filling conductor 13 penetrates each layer of insulator 11 along the thickness direction of each layer of insulator 11 to connect the patterns of each layer The coiled conductor 10 ″, the first external electrode 31 and the second external electrode 32 are formed on the first side surface 113 and the second side surface 114 of the laminated body 1 , and the inside of the first external electrode 31 The edge 312 is connected to the pattern conductor 12 of the uppermost layer of the multilayer pattern conductors 12, and the inner edge 322 of the second external electrode 32 is connected to the pattern conductor 12 of the lowermost layer of the multilayer pattern conductors 12. The outer edge 311 of the electrode 31 is exposed on the bottom surface 111 and the first side surface 113 of the laminate 1 , the outer edge 321 of the second external electrode 32 is exposed on the bottom surface 111 and the second side surface 114 of the laminate 1 , and the first external electrode 31 And the technical solution that the inner edge 322 of the second outer electrode 32 is a curved surface” can improve the connection position between the outer electrode and the inner conductor in the inductor component.

Furthermore, since the connection between the coil (inner conductor) of the inductance component in the prior art and the outer electrode is usually connected to the outer electrode in a straight line in a horizontal direction, or the connection is extended along the normal direction of the outer periphery of the coil. To the external electrodes, it is easy to produce defects such as a decrease in the inductance value and Q value or an increase in the manufacturing cost of the coil. In the inductor component provided by the present invention, the inner edge of the external electrode is first modified into a curved surface, and then the connecting end of the pattern conductor connected to the external electrode is connected to the upper part of the inner edge of the external electrode in the tangential direction T of the surrounding track of the pattern conductor (near the stack the first side and the second side of the laminate) or the lower part (near the bottom side of the laminate). Through the structural improvement of the inductance component provided by the present invention, the distance between the external electrode and the pattern conductor (internal conductor) can be shortened, the manufacturing cost of the coil can be reduced, the inductance value and Q value will not be affected, and the manufacturing cost and effect.

The content disclosed above is only a preferred feasible embodiment of the present invention, and is not intended to limit the protection scope of the claims of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and the accompanying drawings of the present invention are included in the present invention. within the scope of protection of the claims of the invention.

Claims (11)

1. An inductance assembly, comprising:

a laminate comprising a plurality of layers of alternately stacked insulators and pattern conductors, said laminate having opposing bottom and top surfaces and opposing first and second side surfaces, said first and second side surfaces being connected between said bottom and top surfaces, each layer of said pattern conductors being disposed within said laminate, and each layer of said pattern conductors extending along a looped trace at an interface between two adjacent layers of said insulators;

a plurality of filler conductors, each of which is distributed in each of the insulators, each of which penetrates each of the insulators in a thickness direction of each of the insulators to connect two adjacent ones of the pattern conductors to form a wound conductor extending in a spiral shape; and

a first external electrode and a second external electrode formed on the first side surface and the second side surface of the laminate, respectively, an inner edge of the first external electrode being connected to the uppermost pattern conductor of the plurality of pattern conductors, and an inner edge of the second external electrode being connected to the lowermost pattern conductor of the plurality of pattern conductors;

the outer edge of the first external electrode is exposed out of the bottom surface and the first side surface of the laminated body, the outer edge of the second external electrode is exposed out of the bottom surface and the second side surface of the laminated body, and the inner edges of the first external electrode and the second external electrode are curved surfaces.

2. The inductor assembly according to claim 1, wherein each of the patterned conductors has a first end and a second end, and in the patterned conductors of adjacent upper and lower layers, the second end of the patterned conductor of the upper layer and the first end of the patterned conductor of the lower layer are connected through the filler conductor.

3. The inductive element of claim 2, wherein when said first outer electrode is connected to an uppermost one of said plurality of patterned conductors, said first end of said uppermost patterned conductor is connected to said inner edge of said first outer electrode along a tangential direction of said circumferential trace.

4. The inductance assembly according to claim 2, wherein when said second external electrode is connected to a lowermost one of said plurality of layers of said pattern conductors, said second end of said lowermost pattern conductor is connected to said inner edge of said second external electrode in a tangential direction along said circumferential track.

5. The inductance assembly according to claim 2, wherein said first end of said pattern conductor of the uppermost layer is connected to said inner edge of said first external electrode, and a connection point of said first end of said pattern conductor of the uppermost layer and said inner edge of said first external electrode is close to a bottom surface of said laminated body.

6. The inductance assembly according to claim 2, wherein said second end of said pattern conductor of the lowermost layer is connected to an inner edge of said second external electrode, and a connection of said second end of said pattern conductor of the lowermost layer and said inner edge of said second external electrode is close to a bottom surface of said laminated body.

7. The inductance assembly according to claim 1, wherein when the outer edge of the first external electrode is exposed to the first side surface of the laminate, a length of an exposed portion of the outer edge of the first external electrode on the first side surface is at least one third of a length of the first side surface.

8. The inductance assembly according to claim 1, wherein when the outer edge of the second external electrode is exposed to the second side surface of the laminate, a length of an exposed portion of the outer edge of the second external electrode on the second side surface is at least one third of a length of the second side surface.

9. The inductance assembly according to claim 1, wherein said insulator is made of a ceramic material by roll-to-roll coating.

10. The inductance assembly according to claim 1, wherein said insulator is formed by printing a non-photosensitive ceramic paste.

11. The inductance assembly according to claim 1, wherein said filled conductor is formed by perforating said insulator with a laser beam, implanting photosensitive silver paste and developing by exposure.

Images