KR-20260067765-A - Inductors and inductor manufacturing methods

Abstract

The present invention relates to an inductor and a method for manufacturing an inductor that improves the behavioral characteristics of the inductor through a structure that allows for miniaturization of the device by minimizing components, mass production of an inductor having a constant inductance by forming windings in a constant pattern, stabilization of the inductance value and improvement of high-frequency characteristics, and improvement of magnetic field leakage and temperature stability. More specifically, the inductor is characterized by including an outer casing that forms an internal receiving space, and forming an inductor assembly that provides inductance by forming a magnetic field by printing a plurality of layers of windings in a stacking direction on one surface of the outer casing using a conductive paste.

Inventors

• 조주희
• 신덕식
• 김수용

Assignees

• 한국전자기술연구원

Dates

Publication Date

20260513

Application Date

20241106

Claims (9)

1. In the case of an inductor, It includes an outer casing that forms an internal accommodation space, and An inductor characterized by forming an inductor assembly that provides inductance by forming a magnetic field by printing a plurality of layers of windings in a stacking direction using a conductive paste on one surface of the above-mentioned enclosure.
2. In Article 1, The above inductor The inductor assembly is accommodated in the receiving space of the above enclosure, and An inductor characterized by forming a magnetic body by applying and curing a liquid magnetic powder paste in the remaining space of the enclosure in which the above inductor assembly is accommodated.
3. In Article 1, The above inductor assembly forms an annular winding on each of the above layers, and An inductor characterized in that at least a portion of the above-mentioned windings further includes a protrusion protruding to a predetermined height in the stacking direction to connect adjacent layers in the stacking direction.
4. In Paragraph 3, The above inductor assembly is, An inductor characterized by the above-mentioned protrusions being arranged spirally along the stacking direction.
5. In Paragraph 2, The above inductor assembly is, An inductor characterized by being formed in the shape of a cylinder with an inner through hole along the stacking direction.
6. In Article 1, An inductor characterized in that the conductive paste is an ink containing copper or silver particles.
7. In Article 1, A substrate is placed on one side of the enclosure on which the above winding is printed to form a winding on the substrate, and The above substrate is an inductor characterized by being formed from one or more materials selected from ceramic, glass fiber, and polyimide, which have excellent thermal insulation and thermal stability.
8. In the method for manufacturing an inductor according to claim 1, A step of manufacturing the inductor assembly by printing the conductive paste in a stacking direction on one surface of the above-mentioned enclosure; A step of fixing the position of the manufactured inductor assembly in the receiving space of the enclosure; A method for manufacturing an inductor, comprising the step of applying and curing a liquid magnetic powder paste into the empty space of the above-mentioned enclosure.
9. In Paragraph 8, In the step of manufacturing the above inductor assembly, A method for manufacturing an inductor characterized by first applying the conductive paste in an annular shape on one surface of the above-described enclosure to print a plurality of single-layer windings, printing a protrusion protruding to a predetermined height in the stacking direction on at least a part of the single-layer windings, and then printing an annular winding on the next layer.

Description

Inductors and inductor manufacturing methods The present invention relates to an inductor among electronic components, and more specifically to an inductor having constant inductance without a bobbin and a method for manufacturing an inductor. An inductor is an electronic component that functions to suppress sudden changes in current and block external noise. Referring to FIGS. 1 and 2, a typical inductor (10) is manufactured by winding a conductor wire (11) around a core or bobbin structure (12) to form a coil. However, since this method requires complex windings (11) and bobbin structures (12), it increases the overall size and weight of the inductor and limits the miniaturization and manufacturing efficiency of the inductor. Recently, there has been active development of inductors that form magnetic bodies using magnetic powder paste. This allows for the manufacturing of inductors in various shapes and simplifies the manufacturing process. The magnetic body is selected based on the current frequency, and the coil must be wound with an appropriate number of turns to achieve the current capacity and the inductance value required by the circuit. Particularly in terms of manufacturing, to ensure consistent inductance values across products, it is crucial to maintain the same shape and material of the magnetic body and to wind the coil in a consistent pattern. The present invention relates to an inductor having a constant inductance value and a method for manufacturing an inductor by forming a winding by printing and forming a magnetic body using a magnetic powder paste. Figure 1 is a structural diagram of a conventional inductor. FIG. 2 is a cross-sectional perspective view of a conventional inductor FIG. 3 is a structural diagram of an inductor according to one embodiment of the present invention. FIG. 4 is a cross-sectional perspective view of an inductor of the present invention according to one embodiment. FIG. 5 is a detailed view of an inductor assembly of the present invention according to one embodiment. Hereinafter, the technical concept of the present invention will be explained in more detail using the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical concept of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all of the technical concepts of the present invention, and that various modifications capable of replacing them may exist at the time of filing this application. Hereinafter, the technical concept of the present invention will be explained in more detail using the attached drawings. The attached drawings are merely examples illustrated to explain the technical concept of the present invention in more detail, and therefore the technical concept of the present invention is not limited to the form of the attached drawings. Inductors are suitable for small electronic devices, such as mobile phones or wearable devices, where space and weight are critical. Accordingly, inductors require miniaturization of the device and a method to rapidly manufacture inductors with consistent performance for mass production. The inductor of the present invention is characterized by forming a specific pattern by printing windings without bobbins and forming a magnetic body by applying magnetic powder paste. Therefore, it is possible to provide an inductor and a method for manufacturing an inductor that can produce windings with a specific pattern, which reduces manufacturing complexity and costs due to the simple structure, enables a design suitable for miniaturized electronic devices, and allows for manufacturing with consistent performance even in mass production. Referring to FIGS. 3 and 4, the inductor (100) of the present invention comprises an enclosure (130) that includes an internal receiving space, and is characterized by forming an inductor assembly (110) by printing a plurality of layers of windings (111) in a stacking direction using a conductive paste on one side of the enclosure (130). Here, the inductor assembly (110) may be the entire structure of the windings (111) formed by the conductive paste. Furthermore, the inductor assembly (110) is positioned in the receiving space of the enclosure (130), and a magnetic body (120) is formed using the magnetic powder paste by applying a liquid magnetic powder paste to the remaining space of the enclosure (130) and then curing it. Referring to FIGS. 3 and 4, the inductor (100) of the present invention is characterized by including an enclosure (