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JP-2026075038-A - Multilayer ceramic capacitor

JP2026075038AJP 2026075038 AJP2026075038 AJP 2026075038AJP-2026075038-A

Abstract

[Problem] One embodiment aims to provide a multilayer ceramic capacitor that can prevent a decrease in moisture resistance reliability. [Solution] A multilayer ceramic capacitor according to one embodiment includes a body comprising a plurality of dielectric layers and a plurality of internal electrodes stacked in the third direction, including a first and second surface facing a first direction, a third and fourth surface facing a second direction intersecting the first direction, and a fifth and sixth surface facing a third direction intersecting the first and second directions simultaneously; and an external electrode disposed outside the body, wherein the body includes a margin region where no internal electrodes are present, disposed on the outer periphery of the plurality of internal electrodes on the third surface side and the outer periphery on the fourth surface side, and the ratio of the width of the margin region to the width of the body, measured in the second direction, is greater than 8.5% and less than or equal to 9.5%, and the average porosity of the margin region may be greater than 0% and less than 1.1%. [Selection Diagram] Figure 2

Inventors

  • 崔 盤石
  • ▲ジョ▼ 明鉉
  • 朴 恩彩
  • 尹 今姫

Assignees

  • サムソン エレクトロ－メカニックス カンパニーリミテッド．

Dates

Publication Date
20260507
Application Date
20250526
Priority Date
20241021

Claims (7)

  1. A body comprising a plurality of dielectric layers and a plurality of internal electrodes stacked in the third direction, including a first and second surface facing the first direction, a third and fourth surface facing the second direction intersecting the first direction, and a fifth and sixth surface facing the third direction intersecting the first and second directions simultaneously, External electrodes positioned outside the body, Includes, The body is arranged on the outer circumference of the third and fourth surfaces of the plurality of internal electrodes, and the body includes a margin region where no internal electrodes are present. The ratio of the width of the margin region to the width of the body, measured in the second direction, is greater than 8.5% and less than or equal to 9.5%. A multilayer ceramic capacitor in which the average porosity of the margin region is greater than 0% but less than 1.1%.
  2. The multilayer ceramic capacitor according to claim 1, wherein the margin region includes the same dielectric layer as the dielectric layer in the remaining region of the body.
  3. The aforementioned plurality of internal electrodes are The multilayer ceramic capacitor according to claim 1, comprising a plurality of first internal electrodes and a plurality of second internal electrodes arranged alternately in the first direction.
  4. The aforementioned external electrode is The multilayer ceramic capacitor according to claim 3, comprising a first external electrode disposed on the first surface and connected to the plurality of first internal electrodes, and a second external electrode disposed on the second surface and connected to the plurality of second internal electrodes.
  5. The multilayer ceramic capacitor according to claim 1, further comprising a plating layer covering the external electrodes.
  6. The aforementioned plating layer is The first layer covering the external electrode, The multilayer ceramic capacitor according to claim 5, further comprising a second layer covering the first layer and a third layer covering the second layer.
  7. The first layer contains nickel (Ni), The second layer contains copper (Cu), The multilayer ceramic capacitor according to claim 6, wherein the third layer contains tin (Sn).

Description

This disclosure relates to multilayer ceramic capacitors. Electronic components using ceramic materials include capacitors, inductors, piezoelectric elements, varistors, and thermistors. Among these ceramic electronic components, multilayer ceramic capacitors (MLCCs) can be used in a wide variety of electronic devices due to their advantages of being small, having high capacitance, and being easy to mount. A multilayer ceramic capacitor may include a body containing multiple dielectric layers and multiple internal electrodes, and external electrodes positioned outside the body and connected to the internal electrodes. If moisture or hydrogen penetrates the margin region of the body, the moisture resistance reliability of the multilayer ceramic capacitor may be reduced. Figure 1 is a schematic perspective view showing a multilayer ceramic capacitor according to one embodiment.Figure 2 is a separated perspective view schematicly showing the stacked structure of the internal electrodes of the multilayer ceramic capacitor shown in Figure 1.Figure 3 is a schematic plan view showing the first internal electrode of the multilayer ceramic capacitor shown in Figure 1.Figure 4 is a schematic plan view showing the second internal electrode of the multilayer ceramic capacitor shown in Figure 1.Figure 5 is a cross-sectional view taken along the line I-I' in Figure 1.Figure 6 is a cross-sectional view taken along the line II-II' in Figure 1. The embodiments of the present invention will be described in detail below with reference to the attached drawings, so that they can be easily implemented by a person with ordinary skill in the art to which the invention pertains. In the drawings, parts unnecessary for illustrative purposes have been omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. Furthermore, some components in the attached drawings are exaggerated, omitted, or shown schematically, and the size of each component does not fully reflect its actual size. The accompanying drawings are provided solely to facilitate understanding of the embodiments disclosed herein and should not be understood as limiting the technical concept disclosed herein, and should be understood to include any modifications, equivalents, or substitutions that fall within the concept and scope of the present invention. Terms including ordinal numbers, such as "first," "second," etc., can be used to describe various components, but the components are not limited by such terms. These terms are used solely for the purpose of distinguishing one component from others. Furthermore, when we say that a layer, membrane, region, plate, or other part is "on top of" another part, this includes not only the case where it is "directly above" the other part, but also the case where the other part is in between. Conversely, when we say that one part is "directly above" another part, it means that there is no other part in between. Also, being "on top of" a reference part means being located above or below the reference part, and does not necessarily mean being located "above" in the opposite direction of gravity. Throughout the specification, terms such as “includes” or “has” should be understood to indicate the presence of features, figures, steps, actions, components, parts, or combinations thereof described in the specification, without pre-existing exclusion of the presence or possibility of adding one or more other features, figures, steps, actions, components, parts, or combinations thereof. Therefore, when a part “includes” a component, this means that, unless otherwise stated, it does not exclude other components and may further include other components. Furthermore, throughout the specification, "on a plane" refers to the view of the subject from above, and "on a cross-section" refers to the view of a cross-section obtained by cutting the subject perpendicularly, as seen from the side. Furthermore, throughout the specification, the term "connected" does not only mean that two or more components are directly connected, but may also mean that two or more components are indirectly connected through other components, that they are not only physically connected but also electrically connected, or that they are a single unit, even though they are referred to by different names depending on their position or function. Figure 1 is a schematic perspective view showing a multilayer ceramic capacitor according to one embodiment. Referring to Figure 1, the multilayer ceramic capacitor 1000 according to this embodiment includes a body 110, a first external electrode 200, and a second external electrode 300. First, to clearly explain this embodiment, the directions are defined as follows: the L-axis, W-axis, and T-axis shown in the drawing represent the length, width, and thickness directions of the multilayer ceramic capacitor 1000, respectively. The thickness direction (T-axis direction) may be perpe