JP3060200U - Ferrite core products - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention uses a technique such as painting, electroplating, or filling of a conductive material to improve products related to existing ferrite core filters and similar techniques, thereby improving the product. Thus, the objective of high production volume and low cost is realized. The present invention is a kind of filter, and particularly refers to a new ferrite core filter using surface treatment technology. It replaces conventional leads by forming a conductor directly on the ferrite core using techniques such as painting, electroplating or filling with conductive material. This feature is used to improve the skin effect, to manufacture products with features such as high precision, mass production, artificial savings, and quality improvement, and to manufacture ferrite core parts of SMT. Can fit.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention uses techniques such as painting, electroplating or filling with conductive material to improve the existing ferrite core filter and similar products and related products, thereby achieving higher production and lower cost objectives. It is what we are trying to realize.

[0002]

[Problems to be solved by conventional techniques and devices]

 During the conventional ferrite core filter manufacturing process, generally all are done manually. The lead wires have been passed through the ferrite core body one by one, and angle preparation and angle finishing have been performed using appropriate metallurgical tools. Some relatively simple products can be designed and operated with dedicated automated machinery, except that during the ferrite core filter manufacturing process, ferrite is provided with solid copper-based leads.・ Must pass through the core. However, solid conductors are not always efficient conductors. Thus, if the ferrite core filter is operating in a high frequency environment, the dielectric will necessarily cause a skin effect. Thus, for convenience in the manufacturing process, the larger the gap is, the better it is often. However, if this gap is made larger, the loss of magnetic force is further increased. As can be seen from the above, the above-mentioned conventional ferrite core filter has various disadvantages and needs to be improved as soon as possible. As a result of many years of research efforts, the applicant of the present invention has succeeded in developing the ferrite core filter of the present invention and its attached material processing technology.

[0003]

[Means for Solving the Problems]

 The present invention improves the end face and circuit structure of the existing ferrite core wave filter (Ferrite Core Wave Filter) components, and utilizes the conventional ferrite core wave filter using surface treatment technology such as painting, electroplating or filling of a conductive material.・ Core The purpose is to improve the imperfect points of the main body and complete it.

[0004]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings to clarify the technical contents of the present invention, its purpose and effects. FIG. 1 is a perspective view of a conventional ferrite core filter 10. Products produced under conventional manufacturing structures are generally equally hand-manufactured. The lead wires 13 are passed one by one through the main body of the ferrite core 11, and an appropriate metallurgical tool is used to adjust the angle and finish the angle. It is located above the core 11. In order to allow the lead wire 13 to smoothly pass through the hole 12 in the ferrite core, the ferrite core hole 12 is often made large, and the larger the ferrite core hole, the better the work becomes. As a result, this gap becomes increasingly larger and is a major cause of magnetic loss.

FIG. 2 is a cross-sectional view of a conventional ferrite core filter 10. The lead wire 13 passes through the ferrite core hole 12 from this side to the opposite side, and performs angle preparation and angle finishing with a suitable metallurgical tool. It should be located above the core.

FIG. 3 is a three-dimensional view of the first embodiment of the present invention. During the manufacturing process of the present invention, the conductive material is applied to the surface layer 21 on the ferrite core 11 by coating, electroplating, or using a filling material, etc., using surface treatment technology, The conductive electrodes are attached to the wall 121 to form the conductive electrodes 211 and 212, and unnecessary conductive layer portions are removed and finished by a chemical solution or a mechanical cutting method.

FIG. 4 is a sectional view of the first embodiment of the present invention. The ferrite core filter 20 using the surface treatment technology has shown that the dielectric material is in close contact with the ferrite core 11 body or the hole wall 121 of the inner hole of the ferrite core. . Therefore, efficient conductive poles 211 and 212 are generated here. This solves the problem of the gap between the ferrite core 11 and the lead wire 13 in the conventional ferrite core filter 10 and minimizes the loss of magnetic force.・ The efficiency of the core filter was raised due to this. Furthermore, since the conductive material is in close contact with the hole wall 121 of the inner hole of the ferrite core, the conductive structure, which is a hollow cylinder or a hollow body of various shapes, is practically relatively in a high-frequency conductive environment. It goes without saying that it is a kind of conductive structure having better efficiency.

FIG. 5 is a comparison diagram of electrical characteristics between the conventional filtering ferrite core and the surface treatment type filtering device of the present invention. As shown in the figure, a comparison of the electrical characteristics between the conventional filtered ferrite core and the surface-processed filtered ferrite core shows that the surface treatment technology can be determined by observing the relationship between the frequency change and the ferrite core impedance (Impedance). It can be seen that the efficiency of the filter generated by use is relatively superior.

FIGS. 6 and 7 are a perspective view and a sectional view, respectively, of Embodiment 2 of the present invention. It has been shown that the present invention can be similarly applied to the manufacturing process of the metal film type precision coil 30. The entire body of the ferrite core 11 is attached to the conductive material, and cut into a spiral coil 31 by using a cutting technique. At the same time, the induction coefficient at both ends of the ferrite core 11 is measured, and when the induction coefficient reaches within a specified tolerance, cutting is stopped. In this way, a precise induction coefficient within 1% can be produced.

FIG. 8 is a sectional view of a third embodiment of the present invention. This indicates that the present invention can be similarly applied to the manufacturing process of the LC composite component 40. The use of surface-treated conductive layer technology not only makes it possible to produce a high-efficiency filtered ferrite core and precision coil, but also allows an appropriate circuit to be adhered on the ferrite core 11 and allows the PC board to be mounted. Solder the appropriate active and passive components 41 to the surface of the ferrite core 11 in exactly the same way as the ferrite core 11 so that the welding points 411 and 412 of the active and passive components 41 adhere to the ferrite core 11. Can be done. It is also possible to mount electronic components on the motherboard using the ferrite core 11. That is because 11 ferrite cores are a very good material that absorbs magnetic force. In addition, the effect in suppressing electromagnetic glitches (EMC) is also very good.

The technique of the present invention can also be applied to the following examples. (1) End face treatment of surface-adhesive ferrite core coil (SMD Coil): On a slightly high-impedance ferrite core, for example, a Ni—Zn series ferrite core is generally directly ferrite core. End faces can be made directly on the core body by surface treatment. If the impedance of the ferrite core is low, an end face cannot be directly formed on the ferrite core, such as a ferrite core of the MN-Zn series. Be sure to use other high-impedance materials (for example, ceramic or Ni-Zn series) to make the base. An end face is manufactured on the base. After that, the ferrite core coil is placed on the base, and the ferrite core coil is made.

(2) End processing of a multi-layer chip inductor (Multilayer Chip Inductor): In addition to a multi-layer chip inductor, a multi-layer chip bead (Multilayer Chip Bead) and a multi-layer chip bead are included in the multi-layer chip inductor. Includes affiliated products such as Multilayer High Immediate Beads. Using the surface technology of the present invention, the end face is manufactured directly on the product. In this way, the silver paste does not stick, and the manufacturing process of powder metallurgy that reduces to silver is omitted. Since the production of silver paste uses a glue, silver powder, and a glass medium, the glass medium is used to bond the ferrite core and the silver foil in silver reduction powder metallurgy. Since this contact surface is vulnerable to acidic chemicals, electroplating often involves acidic electroplating, and this area presents a major quality problem. If a surface treatment method is used, the ferrite core and the main body are joined by a method of ion or molecular engagement, and the reaction of acid bases to chemicals is relatively insignificant, and the density of the reaction is small. Since the properties are better than silver foil, there are naturally fewer quality issues.

[0013]

[Effect of the invention]

 The surface treatment technology of the present invention is a method of depositing a conductive layer on the body of the ferrite core and on the wall of the inner hole, and will be a new milestone in industry. Not only can it be used for many ferrite core products, but it can be improved with this manufacturing process. For example, ferrite core filter by surface treatment method, metal film precision dielectric, LC composite part, end face of laminated inductor chip array, end face of surface-adhesive ferrite core coil Any part, such as the end face part of the attached base of the part ferrite core coil, can be improved by using the present invention.

As can be seen from the foregoing description, the present invention has provided many unprecedented advancements over conventional ferrite core components. The new and unusual as well as the progressive idea are well in line with the statutory rules of the new patent.

[Brief description of the drawings]

FIG. 1 is a three-dimensional view of a conventional ferrite core filter.

FIG. 2 is a cross-sectional view of a conventional ferrite core filter.

FIG. 3 is a perspective view of the first embodiment of the present invention.

FIG. 4 is a sectional view of the first embodiment of the present invention.

FIG. 5 is a comparison diagram of electrical characteristics between a conventional filtered ferrite core and a filter using the surface treatment method of the present invention.

FIG. 6 is a three-dimensional view of Embodiment 2 of the present invention.

FIG. 7 is a cross-sectional view of Embodiment 2 of the present invention.

FIG. 8 is a sectional view of Embodiment 3 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ferrite core filter 11 Ferrite core 12 Ferrite core hole 121 Hole wall 13 Lead wire 131 Conducting pole 1 132 Conducting pole 220 Ferrite core filter by surface treatment technology 21 Surface layer 211 Conducting pole 1 212 Conducting pole 230 Metal Coating type precision coil 31 Spiral coil 40 LC composite component 41 Active and passive component 411 Weld point 1

[Procedure amendment]

[Submission date] March 5, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of device

[Correction method] Change

[Correction contents]

[Name of device] Ferrite core product

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (7)

[Utility model registration claims] 1. A kind of ferrite core filter, in which a conductive material is filled into a ferrite core filter by using a surface treatment technique on a ferrite core, and unnecessary conductive material in the ferrite core filter is removed. After that, a conductive pole 1 and a conductive pole 2 are formed on the surface of the ferrite core, and a filter can be formed together with the ferrite core by borrowing a lead wire formed between the conductive poles. Core filter. 2. The ferrite core filter according to claim 1, wherein the surface treatment of the ferrite core includes forming a conductive material by using a coating technique. Core filter. 3. The ferrite core filter according to claim 1, wherein the surface treatment of the ferrite core in the ferrite core filter comprises forming a conductive material by using an electroplating technique. Core filter. 4. A new ferrite core filter according to claim 1, wherein the conductive material can be formed by applying the same to the surface treatment technology of a metal film type precision coil component. Core filter. 5. A ferrite core filter as claimed in claim 1, wherein a suitable circuit is deposited on the ferrite core, and also applied to the surface treatment technique of the LC composite part. A new type of ferrite core filter, characterized in that suitable active and passive components can be adhered above the core surface to form an LC composite component. 6. The ferrite core filter according to claim 1, wherein a necessary numerical value can be formed instead of using a chemical solution to remove an unnecessary conductive material. Filter. 7. The ferrite core filter according to claim 1, wherein a required numerical value can be formed instead of removing unnecessary conductive material by using mechanical cutting. Filter.