Coil component

By using conductive paste to form a terminal electrode structure with protrusions and recesses in the coil component, the problem of the inability to arbitrarily adjust the planar shape of the terminal electrode is solved, achieving high-density installation and reducing solder joint extension.

CN116997981BActive Publication Date: 2026-07-10TDK CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TDK CORP
Filing Date
2022-02-22
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing coil components, the planar shape of the terminal electrodes is determined by the electrode pattern exposed by the magnetic components, which cannot be arbitrarily adjusted, leading to easy misalignment of the mounting position and expansion of the solder feet during installation.

Method used

Conductive paste is used as the terminal electrode material. A first region is formed on the mounting surface to cover the electrode pattern, while the second and third regions are not covered by the electrode pattern. The first region protrudes in the second direction to form a protrusion. The second and third regions are narrower than the first region in the first direction, and the central part is locally thinner to form a recess, which inhibits solder expansion.

Benefits of technology

It enables arbitrary shape of terminal electrode plane, reduces mounting position offset and solder leg extension during installation, and supports high-density installation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116997981B_ABST
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Abstract

The technical problem of the present invention is to improve a coil component having a structure in which a magnetic member is embedded in the coil portion. The coil component (10A) of the present invention includes: a coil portion (20) in which a magnetic member (11-13) is embedded, and terminal electrodes (71, 72) made of conductive paste. The conductor layer constituting the coil portion (20) has: coil conductor patterns (C1-C4) and electrode patterns (51-54) exposed from the mounting surface (S1). The terminal electrode (71) has: a region (A1) located on the mounting surface (S1) covering the electrode patterns (51-54); and regions (A2, A3) located on the mounting surface (S1) not covering the electrode patterns (51-54). A portion of region (A1) forms a protrusion (A11) protruding in the x-direction. Thus, since the terminal electrode 71 has a protrusion (A11), it is less likely to cause a misalignment of the mounting position in the z-direction during installation.
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