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Multilayer coil component

A coil element, layered technology, applied in coil manufacturing, electrical components, including printed electrical components, etc., can solve problems such as unintended use, and achieve the effect of excellent high-frequency characteristics

Active Publication Date: 2019-10-18
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multilayer inductor described in Patent Document 1 discloses preferable ranges for the film thickness of the coil part, the thickness of the electrodes, and various dimensions, but none of the numerical values ​​assumes use in a high-frequency band of 20 GHz or higher.

Method used

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  • Multilayer coil component
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] (1) A ferrite raw material (calcined powder) having a predetermined composition is prepared.

[0141] (2) Add organic binder (polyvinyl butyral resin), organic solvent (ethanol and toluene) to the above calcined powder and put it into a pot mill together with PSZ balls, and fully mix and pulverize it by wet method to produce Magnetic slurry.

[0142] (3) The above-mentioned magnetic slurry was shaped into a sheet by the doctor blade method, and punched out into a rectangular shape to produce a plurality of magnetic sheets having a thickness of 15 μm.

[0143] (4) A conductive paste for an internal conductor containing Ag powder and an organic vehicle is prepared.

[0144](5) Manufacture of via hole sheet

[0145] Via holes are formed by irradiating laser light at predetermined positions on the magnetic sheet. Via hole conductors are formed by filling the via holes with conductive paste and screen printing the conductive paste in a circle around the via holes.

[014...

Embodiment 2

[0158] Example 2 was created by changing the number of stacked coil sheets serving as coil conductors and the via hole sheets serving as connection conductors, and the thickness of the magnetic sheets constituting the coil sheets and via hole sheets. sample. The dimensions of the laminate and the shape of the external electrodes are the same as in Example 1.

Embodiment 3～4

[0172] (Simulation 1 of transmission coefficient S21: length of connecting conductor)

[0173] The relationship between the frequency and the transmission coefficient S21 was simulated for the laminated coil element under the following conditions. The results are shown in Table 1 and Figure 9 shown.

[0174] Laminate width: 300 μm

[0175] Coil length: 510μm

[0176] Number of turns of coil conductor: 42

[0177] Inner diameter of coil conductor: 100μm

[0178] Line width of coil conductor: 60μm

[0179] Coil conductor film thickness: 4μm

[0180] Distance between coil conductors (thickness of insulating layer): 5μm

[0181] The length of the connecting conductor: 20 or 45μm

[0182] Width of connecting conductor: 30μm

[0183] Width of the land that constitutes the connecting conductor: 80 μm

[0184] Table 1

[0185]

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Abstract

The invention provides a multilayer coil component with good high frequency features. The multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers and including a coil built therein, and first and second outer electrodes electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors stacked together with the insulating layers. The multilayer coil component further includes, inside the multilayer body, first and second connecting conductors. The first connecting conductor connects between a portionof the first outer electrode covering the first end face, and a coil conductor facing the portion. The second connecting conductor connects between a portion of the second outer electrode covering the second end face, and a coil conductor facing the portion. Concerning the length direction, the first and second connecting conductors each have a length from about 2.5% to about 7.5% of the length of the multilayer body.

Description

technical field [0001] The present invention relates to a laminated coil component. Background technique [0002] As a laminated coil element, for example, Patent Document 1 discloses a laminated inductor including an element body, a coil portion embedded in the element body, a pair of lead portions embedded in the element body and electrically connected to the coil portion, and a set A pair of electrodes are provided at both end portions of the element body and are electrically connected to the lead-out portion, and a winding axis of the coil portion intersects the electrodes. The multilayer inductor described in Patent Document 1 is characterized in that 1.5<L7÷L6<7.0 is satisfied when the film thickness of the coil portion is L7 and the electrode thickness is L6. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2001-126925 [0004] In response to the increase in communication speed and miniaturization of electrical equipment in recent years, multilayer in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/32
CPCH01F27/2804H01F27/323H01F2027/2809H01F27/292H01F27/34H01F17/0013H01F17/04H01F2017/002H01F27/29H01F2027/297H01G4/005H01F41/12H05K1/165
Inventor 比留川敦夫
Owner MURATA MFG CO LTD