JPH0662513U - Surface mount coil components - Google Patents

Abstract

(57) [Abstract] [Purpose] A surface mount type in which three or more coil-shaped conductors exhibiting substantially the same inductance value in the air core are aligned in a line in a plate-shaped magnetic body and three or more inductors are provided in parallel. Suppress variation in inductance between inductors of coil parts. [Structure] The distance from the one end face of the magnetic material of the surface mount type coil component in the alignment direction to the side end of the first coiled conductor measured in the alignment direction is from the side end opposite to the coiled conductor. The distance is set to 50 to 200% of the distance to the side end of the next coiled conductor adjacent in the alignment direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coil component, and more particularly to a surface mount type coil component in which the variation of the inductor is suppressed in the coil component having three or more identical inductors built therein.

[0002]

[Prior art]

 A composite coil component having a large number of inductance circuits called an inductance array or network is known. In such a composite coil component, circuits having substantially the same inductance are arranged in parallel and used as independent coils or connected in parallel. When combining multiple coils with conductors wound on different magnetic cores to form a composite coil, the magnetic path of each coil is highly independent, and it is easy to keep the variation in the inductance of each coil below 10%. Is. However, recently, a plurality of sets of conductive paste layers for forming a conductor coil and ferrite powder paste layers for forming a soft magnetic material are alternately laminated by using a screen printing technique or at a higher temperature. Inductance arrays have been used that have been fired to form multiple inductors in parallel. In this case, the independence of the magnetic path is reduced, and thus the variation in the inductance between the coils is increased.

[0003]

[Problems to be solved by the device]

 In a composite coil component having multiple inductance circuits, it is important to suppress variations in the characteristics of each circuit. In particular, in the case of a circuit in which multiple identical inductance elements called an inductance array or network are arranged in parallel, the circuits located at both ends of the part and the circuits located in the parts are different from the effective area of each magnetic path. Differences in characteristics are likely to occur. Therefore, an object of the present invention is to suppress the variation in the inductance of a composite coil in which a large number of coils having substantially the same inductance are arranged in parallel.

[0004]

[Means for Solving the Problems]

 The present invention relates to a surface mount type coil component in which three or more coil-shaped conductors having substantially the same inductance value at the time of air core are aligned in a line in a plate-shaped magnetic body and three or more inductors are provided in parallel, The distance from the one end face of the magnetic body in the alignment direction to the side end of the first coiled conductor measured in the alignment direction is the next coil adjacent in the alignment direction from the opposite side end of the coiled conductor. A conventional problem is solved by a surface-mounted coil component, which is characterized by being 50 to 200% of the distance to the side end of the strip conductor.

[0005]

[Function of the device]

 Generally, the tolerance of high-performance coil parts is within 10%, and the distance w1 from the one end face of the magnetic material in the alignment direction to the side end of the first coil-shaped conductor measured in the alignment direction and the coil-shaped conductor If the ratio w1 / w2 of the distance w2 from the side end on the opposite side to the side end of the next coiled conductor adjacent in the alignment direction is 0.5 (50%) or more, this may be satisfied. it can. If it is 200% or more, the same effect is obtained, but if it is 2.0 (200%) or more, the effective area usable as a circuit is extremely reduced, which is not practical.

[0006]

[Explanation of Examples]

 Hereinafter, the present invention will be described in detail with reference to embodiments. 1 is a plan view of a composite coil component (inductor array) according to an embodiment of the present invention, and FIG. 2 is a front sectional view thereof. Reference numeral 1 is a magnetic material which is made of sintered soft magnetic ferrite and which forms a flat rectangular parallelepiped, in which four coil-shaped conductors 7, 9, 11 and 13 having the same physical shape are arranged at regular intervals w2. It is embedded in the aligned state. Therefore, assuming an air-core coil, the inductance of the inductor formed by these coil-shaped conductors is almost constant. The side ends of the coiled conductors 7 and 13 at the left and right ends are formed at a distance w1 from the left and right end faces of the magnetic body 1. The coil-shaped conductors 7 to 13 are arranged in parallel by providing film-like lead terminals 3 and 5 on the paired lower end surface of the magnetic body 1. The composite coil component having this structure can be easily manufactured by any conventionally known lamination method, for example, the method described in JP-A-55-36954. The magnetic path of the obtained composite coil component is as shown by 15 in FIG.

Example 1 A sample in which the composite coil component having the above-mentioned structure was used as soft magnetic ferrite to use Ni-Cu-Zn ferrite and Ag-Pd alloy as a coiled conductor, and w1 / w2 was changed. We made a number of these and measured the inductance ratio of the edge and the adjacent inductor. The inductors excluding both ends can be suppressed within a variation range of 10% as long as w2 is kept substantially constant. The results shown in Table 1 were obtained on average regardless of the coil size. It can be seen that the intersection within 10% is the case where W1 / 2 is 50% or more. Further, it may be over 200%, but it is not preferable because an extra material is required.

[0008]

[Table 1]

[0009]

[Effect of device]

 From the above, according to the present invention, it is possible to suppress the variation in the inductance of the composite coil in which a large number of coils having the same inductance are arranged in parallel.

[Brief description of drawings]

FIG. 1 is a plan view of a composite coil component (inductor array) according to an embodiment of the present invention.

FIG. 2 is a front sectional view of a composite coil component according to an embodiment of the present invention.

[Explanation of symbols]

1 Magnetic material in the form of a rectangular parallelepiped made of soft magnetic ferrite 3, 5 terminals 7, 9, 11, 13 Coil

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Seiji Watanabe 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation

Claims (2)

[Scope of utility model registration request] 1. A surface mount type coil component in which three or more coil-shaped conductors exhibiting substantially the same inductance value when air-core is aligned in a row in a plate-shaped magnetic body and three or more inductors are provided in parallel, The distance from the one end face of the magnetic body in the alignment direction to the side end of the first coiled conductor measured in the alignment direction is the next coil adjacent in the alignment direction from the opposite side end of the coiled conductor. 50-200% of the distance to the side end of the strip conductor. 2. The surface mount type coil component according to claim 1, wherein the variation of the inductance value among the inductors is within 10%.