JP-2026075747-A - Terminal structure of electronic components for suppressing electromagnetic noise radiation

JP2026075747AJP 2026075747 AJP2026075747 AJP 2026075747AJP-2026075747-A

Abstract

[Problem] To provide a terminal structure for electronic components that effectively suppresses electromagnetic noise radiation. [Solution] This is a terminal structure for an electronic component in which metal terminals 2 and 3 are provided on the entire surface of both sides of a rectangular parallelepiped electronic component 1, such as a capacitive component, inductor component, or resistor component, which is called a chip component. When the electronic component is viewed from above, the outer periphery of the metal terminals on both sides is arc-shaped. When the electronic component is viewed from the side so that the two metal terminals on both sides are visible, the upper parts of the two metal terminals on both sides are arc-shaped. This makes it possible to effectively suppress electromagnetic noise radiation such as EMI (Electromagnetic Interference). [Selection Diagram] Figure 8

Inventors

神谷浩

Assignees

株式会社Ｍ３

Dates

Publication Date: 20260511
Application Date: 20241023

Claims (9)

A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, In the aforementioned electronic component, the vertical dimension is a first width (W1) and the vertical dimension is a first height (H1), and the first height (H1) is half the value of the first width (W1). When the aforementioned electronic component is viewed from above, the outer periphery of the metal terminals on both sides is in the shape of a semicircular arc. The radius (R1) of the arc of one metal terminal as viewed from above, The radius (R2) of the arc of the other metal terminal as viewed from above is, This value is half of the first width (W1), which is the vertical width of the aforementioned electronic component. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper parts of the two metal terminals on both sides are in the shape of a quarter-circular arc. The radius (R3) of the upper quarter circle of one of the metal terminals as viewed from the side, The radius (R4) of the upper quarter circle of the other metal terminal, as viewed from the side, A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that it is the same as the first height (H1), which is the height of the aforementioned electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, In the aforementioned electronic component, the vertical dimension is a first width (W1), and the vertical dimension is a second height (H2), wherein the second height (H2) is less than half the value of the first width (W1). When the aforementioned electronic component is viewed from above, the outer periphery of the metal terminals on both sides is in the shape of a semicircular arc. The radius (R1) of the arc of one metal terminal as viewed from above, The radius (R2) of the arc of the other metal terminal as viewed from above is, This value is half of the first width (W1), which is the vertical width of the aforementioned electronic component. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The tops of the two metal terminals on both sides are curved. The radius (R5) of the upper arc of one of the metal terminals as viewed from the side, The radius (R6) of the upper arc of the other metal terminal, as viewed from the side, A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that the terminal is half the first width (W1) of the electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a first width (W1) as its vertical dimension and a second height (H2) as its vertical dimension. The second height (H2) is less than half the value of the first width (W1), When the aforementioned electronic component is viewed from above, the outer periphery of the metal terminals on both sides is in the shape of a semicircular arc. The radius (R1) of the arc of one metal terminal as viewed from above, The radius (R2) of the arc of the other metal terminal as viewed from above is, This value is half of the first width (W1), which is the vertical width of the aforementioned electronic component. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper parts of the two metal terminals on both sides are elliptical arcs, and when the ellipse containing the elliptical arc is cut along its minor and major axes, it has a portion that is 1/4 of the elliptical area. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The metal terminal has an ellipse containing an elliptical arc with a minor axis in the height direction, The length of the major axis (L1) of the ellipse containing the upper elliptical arc of the aforementioned metal terminal as viewed from the side, The length of the major axis (L2) of the ellipse containing the upper elliptical arc of the other metal terminal, as viewed from the side, Equal to the first width (W1) of the aforementioned electronic component, The length of the minor axis (S1) of the ellipse containing the elliptical arc at the top of the aforementioned metal terminal, as viewed from the side, The length of the minor axis (S2) of the ellipse containing the upper elliptical arc of the other metal terminal, as viewed from the side, A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that the second height (H2) of the electronic component is twice the value of the second height (H2) of the electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a first width (W1) as its vertical dimension and a second height (H2) as its vertical dimension. The second height (H2) is less than half the value of the first width (W1), When the aforementioned electronic component is viewed from above, the outer periphery of the metal terminals on both sides is in the shape of a semicircular arc. The radius (R1) of the arc of one metal terminal as viewed from above, The radius (R2) of the arc of the other metal terminal as viewed from above is, This value is half of the first width (W1), which is the vertical width of the aforementioned electronic component. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper part of the aforementioned metal terminal is curved, The radius (R5) of the upper arc of one of the metal terminals, as viewed from the side, This value is half the first width (W1) of the aforementioned electronic component. The upper part of the other metal terminal is an elliptical arc, and it has a portion that is 1/4 of the area of the ellipse when the ellipse containing the elliptical arc is cut along the minor axis and the major axis. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The metal terminal has an ellipse containing an elliptical arc with a minor axis in the height direction, The length of the major axis (L2) of the ellipse containing the upper elliptical arc of the other metal terminal, as viewed from the side, Equal to the first width (W1) of the aforementioned electronic component, The length of the minor axis (S2) of the ellipse containing the upper elliptical arc of the other metal terminal, as viewed from the side, A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that the second height (H2) of the electronic component is twice the value of the second height (H2) of the electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a second width (W2) as its vertical dimension and a first height (H1) as its height. The second width (W2) is less than twice the value of the first height (H1). When the aforementioned electronic component is viewed from above, the metal terminals on both sides have an elliptical arc on their outer periphery with a minor axis in the direction of the vertical width of the metal terminal. The aforementioned metal terminal has half the area of the ellipse obtained when the ellipse containing the elliptical arc is cut along its minor axis. The length of the major axis (L3) of the ellipse containing the elliptical arc of one of the metal terminals as viewed from above, The length of the major axis (L4) of the ellipse containing the elliptical arc of the other metal terminal, as viewed from above, This value is equal to twice the first height (H1) of the aforementioned electronic component. The length of the minor axis of the ellipse containing the elliptical arc of one of the metal terminals as viewed from above (S3), The length of the minor axis of the ellipse containing the elliptical arc of the other metal terminal as viewed from above (S4) is Equal to the second width (W2) of the aforementioned electronic component, When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper parts of the two metal terminals on both sides are in the shape of a quarter-circular arc. The radius (R3) of the upper quarter circle of one of the metal terminals as viewed from the side, The radius (R4) of the upper quarter circle of the other metal terminal, as viewed from the side, The first height (H1), which is the height of the aforementioned electronic component, A terminal structure for an electronic component for suppressing electromagnetic noise radiation, characterized in that the first height (H1) of the electronic component is half the first width (W1) of the electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a first width (W1) as its vertical dimension and a first height (H1) as its height. When the aforementioned electronic component is viewed from above, the metal terminals on both sides have an elliptical arc on their outer periphery, with the major axis in the direction of the vertical width of the metal terminal. The metal terminals on both sides have a portion that is half the length of the ellipse when the elliptical arc containing the elliptical arc is cut along its major axis when viewed from above. When the aforementioned electronic component is viewed from the side so that the metal terminals on both sides are visible, The upper parts of the metal terminals on both sides have an elliptical arc with a major axis in the height direction, The metal terminals on both sides are When the ellipse containing the aforementioned elliptical arc is viewed from the side, it has a portion that is 1/4 of the elliptical area when the ellipse is cut along its minor and major axes. One of the metal terminals of the electronic component has a first thickness (T3), The other metal terminal of the electronic component has a second thickness (T4), The first thickness (T3) of one of the metal terminals of the above electronic component, The second thickness (T4) of the other metal terminal of the aforementioned electronic component is The first width (W1) of the electronic component is half of the value, It is smaller than the value of the first height (H1) of the aforementioned electronic component. The length of the major axis (L5) of the ellipse containing the elliptical arc of one of the metal terminals as viewed from above, The length of the major axis (L6) of the ellipse containing the elliptical arc of the other metal terminal, as viewed from above, Equal to the first width (W1) of the aforementioned electronic component, The length of the major axis (L7) of the ellipse containing the upper elliptical arc of the aforementioned metal terminal as viewed from the side, The length of the major axis (L8) of the ellipse containing the upper elliptical arc of the other metal terminal, as viewed from the side, This value is equal to twice the first height (H1) of the aforementioned electronic component. The length of the minor axis of the ellipse containing the elliptical arc of one of the metal terminals as viewed from above (S5), The length of the minor axis (S7) of the ellipse containing the upper elliptical arc of the one metal terminal as viewed from the side is equal to twice the first thickness (T3) of the one metal terminal of the electronic component. The length of the minor axis of the ellipse containing the elliptical arc of the other metal terminal as viewed from above (S6), The length of the minor axis of the ellipse containing the upper elliptical arc of the other metal terminal, as viewed from the side (S8), A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that the second thickness (T4) of the other metal terminal of the electronic component is equal to twice the value of the second thickness (T4) of the other metal terminal of the electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a second width (W2) as its vertical dimension and a first height (H1) as its height. The second width (W2) is less than twice the value of the first height (H1). When the aforementioned electronic component is viewed from above, The outer periphery of the metal terminals on both sides has a shape that includes the outermost semicircular part and the rectangular part. The radius (R7) of the arc of the semicircular portion of one of the metal terminals as seen from above, The radius of the arc of the semicircular portion of the other metal terminal, as viewed from above (R8), This value is half the second width (W2) of the aforementioned electronic component. The length (T1) of one side of the rectangular portion of the metal terminal as viewed from above that connects to the tangent of the arc, The length (T2) of one side connected to the tangent to the arc in the rectangular portion of the other metal terminal as viewed from above is, The value obtained by subtracting half the second width (W2) of the electronic component from the first height (H1) of the electronic component. The length of the other side of the rectangular portion of the one metal terminal as viewed from above, The length of the other side of the rectangular portion of the other metal terminal, as viewed from above, This value is equal to the second width (W2) of the aforementioned electronic component. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper parts of the two metal terminals on both sides are in the shape of a quarter-circular arc. The radius (R3) of the upper quarter circle of one of the metal terminals as viewed from the side, The radius (R4) of the upper quarter circle of the other metal terminal, as viewed from the side, A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that it is the same as the first height (H1), which is the height of the aforementioned electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a second width (W2) as its vertical dimension and a first height (H1) as its height. The second width (W2) is less than twice the value of the first height (H1). When the aforementioned electronic component is viewed from above, The outer periphery of one of the aforementioned metal terminals has a shape that includes the outermost semicircular part and the rectangular part. The radius (R7) of the arc of the semicircular portion of one of the metal terminals, as viewed from above, This value is half the second width (W2) of the aforementioned electronic component. The length (T1) of one side of the rectangular portion of the aforementioned metal terminal, as viewed from above, that connects to the tangent of the arc, The value obtained by subtracting half the second width (W2) of the electronic component from the first height (H1) of the electronic component. The length of the other side of the rectangular portion of the one metal terminal as viewed from above is This value is equal to the second width (W2) of the aforementioned electronic component. The other metal terminal has an elliptical arc with a minor axis in the vertical direction of the metal terminal, The other metal terminal has half the area of the ellipse when the ellipse containing the elliptical arc is cut along its minor axis. The length of the major axis (L4) of the ellipse containing the elliptical arc of the other metal terminal, as viewed from above, This value is equal to twice the first height (H1) of the aforementioned electronic component. The length of the minor axis of the ellipse containing the elliptical arc of the other metal terminal as viewed from above (S4) is It is equal to the second width (W2) of the aforementioned electronic component, When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper parts of the two metal terminals on both sides are in the shape of a quarter-circular arc. The radius (R3) of the upper quarter circle of one of the metal terminals as viewed from the side, The radius (R4) of the upper quarter circle of the other metal terminal, as viewed from the side, A terminal structure for an electronic component that suppresses electromagnetic noise radiation, characterized in that it is the same as the first height (H1), which is the height of the aforementioned electronic component.
A terminal structure for an electronic component, wherein metal terminals having sides of the same shape as the sides are provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, The aforementioned electronic component has a first width (W1) as its vertical dimension and a first height (H1) as its height. The first thickness (T3) of one metal terminal of the electronic component, The second thickness (T4) of the other metal terminal of the electronic component is The first width (W1) of the electronic component is half of the value, It is smaller than the value of the first height (H1) of the aforementioned electronic component. When the aforementioned electronic component is viewed from above, The two metal terminals on either side have a shape that combines one quarter-circle section, a rectangular section, and the other quarter-circle section. When the aforementioned electronic component is viewed from the side so that the two metal terminals on both sides are visible, The upper part of the two metal terminals on both sides is a quarter-circle, and the lower part is a rectangle. The radius (R9) of one of the quarter-circular portions of the aforementioned metal terminal as viewed from above, The radius (R10) of the other quarter-circular portion of the one metal terminal as viewed from above, When viewed from the side, the radius (R13) of the upper quarter-circle portion of one of the metal terminals is, Equal to the first thickness (T3) of one of the metal terminals of the aforementioned electronic component, The radius (R11) of one quarter-circular portion of the other metal terminal as viewed from above, The radius (R12) of the other quarter-circular portion of the other metal terminal as viewed from above, The radius (R14) of the upper quarter-circular portion of the other metal terminal, as viewed from the side, Equal to the second thickness (T4) of the other metal terminal of the aforementioned electronic component, The length of one side connected to the tangent of the arc in the rectangular portion of the one metal terminal, as viewed from above, is the value obtained by subtracting twice the first thickness (T3) of the one metal terminal of the electronic component from the first width (W1) of the electronic component. The length of the other side of the rectangular portion of the one metal terminal, as viewed from above, which is perpendicular to one side, is equal to the first thickness (T3) of the one metal terminal of the electronic component. The length of one side connected to the tangent to the arc in the rectangular portion of the other metal terminal, as viewed from above, is the value obtained by subtracting twice the second thickness (T4) of the other metal terminal of the electronic component from the first width (W1) of the electronic component. The length of the other side of the rectangular portion of the other metal terminal, as viewed from above, which is perpendicular to one side, is equal to the second thickness (T4) of the other metal terminal of the electronic component. When viewed from the side, the length of one side connected to the tangent of the arc in the rectangular portion at the bottom of one of the metal terminals is the value obtained by subtracting the first thickness (T3) of one of the metal terminals of the electronic component from the first height (H1) of the electronic component. When viewed from the side, the length of the other side perpendicular to one side of the rectangular portion at the bottom of one of the metal terminals is equal to the first thickness (T3) of one of the metal terminals of the electronic component. The length of one side connected to the tangent of the arc in the rectangular portion at the bottom of the other metal terminal, as viewed from the side, is the value obtained by subtracting the second thickness (T4) of the other metal terminal of the electronic component from the first height (H1) of the electronic component. A terminal structure for an electronic component for suppressing electromagnetic noise radiation, characterized in that the length of the other side perpendicular to one side of the rectangular portion at the bottom of the other metal terminal, as viewed from the side, is equal to the second thickness (T4) of the other metal terminal of the electronic component.

Description

This invention relates to the shape of metal terminals of electronic components, and more particularly to EMI technology for suppressing electromagnetic noise radiation in the high-frequency range. In recent years, with the increasing speed of electronic devices, the electronic components used within them are utilizing high-frequency signals, and there is a growing trend towards lower voltages to reduce power consumption. These electronic components include chip components, such as chip capacitive components, chip resistors, and chip inductors, which are shaped like rectangular prisms. They are packaged in SMD (Surface Mount Device) form and each has metal terminals. When high-frequency current flows through these electronic components, electromagnetic noise is radiated from the metal terminals attached to the package (such as SMD) to the outside of the electronic component, causing EMI (Electromagnetic Interference). Furthermore, with the increasing frequency of future technologies, there are concerns that electromagnetic noise radiated from metal terminals attached to packages such as SMDs will increase, potentially affecting surrounding materials, equipment, and the environment. Furthermore, due to the current trend towards reducing energy consumption, devices operate at lower voltages, which makes them relatively more susceptible to electromagnetic noise. As a countermeasure, circuit-based methods such as SSC (Spread Spectrum Clock) are being considered to disperse and suppress EMI electromagnetic noise. However, a challenge remains: there is no method that takes into account the shape of the metal terminals attached to packages such as SMD. Furthermore, regarding these electromagnetic noises, the need to use gaskets and other materials extensively to protect the device casing increases the overall cost of the device and the amount of materials used, which presents another challenge. Japanese Patent Publication No. 2009-60067 Top view and front view of one embodiment of the present inventionTop view and front view in another embodiment of the present inventionTop view and front view in another embodiment of the present inventionTop view and front view in another embodiment of the present inventionTop view, front view, and metal terminal diagram in another embodiment of the present inventionTop view and front view in another embodiment of the present inventionTop view and front view in another embodiment of the present inventionTop view and front view in another embodiment of the present inventionMetal terminal diagram in an embodiment of the present inventionMetal terminal diagram in an embodiment of the present inventionTop view and front view in another embodiment of the present inventionTop and front views of the terminal structure without considering electromagnetic noise.Schematic diagram of impedance mismatch due to corner wiring The embodiments will be described below with reference to the drawings. Furthermore, in the descriptions of the drawings, the same reference numeral is used for identical elements, and redundant explanations are omitted. Furthermore, drawings are intended for understanding purposes, and the actual dimensional ratios do not necessarily match those of the actual components. Also, electronic components called chip components are rectangular prisms defined by their width, length, and height. They have metal terminals on both sides, and below these terminals is a surface for soldering to metal pads on printed circuit boards, etc. When the metal terminals are visible on both sides, and the soldering surface is located at the bottom, the width refers to the length in the left-right direction, and the length refers to the length in the depth direction (front-back direction). In addition, when the metal terminals are arranged so that they are visible on both sides and viewed from above, the thickness of the metal terminals refers to the length of the metal terminal portion from the outermost edge of each metal terminal towards the outer circumference on both sides. Figure 1 shows a top view and a front view of one embodiment of the present invention. Figure 1(a) is a top view, and Figure 1(b) is a front view. In the top view and front view of Figure 1, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3, and in the top view, the electronic component 1 has a first width (W1) as its vertical width when viewed from above. In the front view, the electronic component 1 has a first height (H1) when viewed from the side. It has. In the top view of Figure 1, the outer circumferences of the two metal terminals on both sides are semicircular arcs. The radius (R1) of the arc of one of the metal terminals 2 in the top view, The radius (R2) of the arc of the other metal terminal 3 in the top view is, This value is half the first width (W1) of the electronic component 1. In the front view of Figure 1, when the electronic component 1 is vie