Terminal structure of electronic component for suppressing electromagnetic noise radiation

Abstract

The purpose of the present invention is to solve the problem that a current shape of an electronic component is not a shape that takes into consideration a high frequency band of a terahertz band although a terahertz frequency has started to be used recently. In a terminal structure of an electronic component in which metal terminals are provided on the entire surfaces on both sides of a rectangular parallelepiped electronic component such as a capacitive component, an inductor component, and a resistance component called a chip component, the terminal structure of an electronic component is characterized in that when the electronic component is viewed from above, the outer peripheral parts of the metal terminals on both sides are arc-shaped, and when the electronic component is viewed from the side so that the two metal terminals on both sides can be seen, the upper parts of the two metal terminals on both sides are arc-shaped.

Description

Terminal Structure of Electronic Component for Suppressing Electromagnetic Noise Emission

[0001] The present invention relates to the shape of the metal terminals of electronic components, and particularly to EMI technology for suppressing electromagnetic noise emission in the high-frequency range.

[0002] These days, with the increasing speed of electronic devices, high-frequency signals are also used in the electronic components used therein. In addition, the trend towards lower voltage for power reduction is progressing.

[0003] Among these electronic components, there are chip capacitive components, chip resistors, chip inductors, etc. called chip components with a rectangular parallelepiped shape. As packages, SMD (Surface Mount Device) ones are used, and each has metal terminals.

[0004] When high-frequency currents flow inside these electronic components, electromagnetic noise is radiated from the metal terminals associated with packages such as SMDs to the outside of the electronic components, which causes EMI (Electromagnetic Interference).

[0005] In addition, due to further future high-frequencyization, the electromagnetic noise radiated from the metal terminals associated with packages such as SMDs tends to increase, and there is concern that it may affect surrounding members, devices, and the environment.

[0006] Furthermore, due to the current trend of reducing energy consumption these days, there is also a problem that devices are more susceptible to the influence of electromagnetic noise because they operate at low voltages.

[0007] As a countermeasure for this, circuit-wise, methods such as SSC (Spread Spectrum Clock) are considered to disperse and suppress EMI electromagnetic noise, but there is a problem that there is no method that considers the shape of the metal terminals themselves associated with packages such as SMDs.

[0008] Also, regarding these electromagnetic noises, there is also a problem that gaskets and the like are frequently used to prevent them from the device housing, increasing the cost of the entire device and the amount of materials used.

[0009] Japanese Patent Publication No. 2009-60067

[0010] While Patent Document 1 provides a shield for shielding electronic components from electromagnetic interference (EMI) and radio frequency interference (RFI), it does not mention the shape of the metal terminals.

[0011] This invention provides a method for suppressing the emission of electromagnetic noise caused by specific shapes of metal terminals of electronic components.

[0012] The present invention relates to a terminal structure for an electronic component, which is a rectangular parallelepiped-shaped electronic component called a chip component, wherein metal terminals are provided on the entire surface of both sides of the component, and when the electronic component is viewed from above, the outer periphery of the metal terminals on both sides is arc-shaped, and 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 terminal structure for an electronic component is characterized in that it is possible to effectively suppress electromagnetic noise radiation.

[0013] The present invention relates to a terminal structure for an electronic component, which is a rectangular parallelepiped-shaped electronic component called a chip component, wherein metal terminals are provided on the entire surface of both sides of the component, and when the electronic component is viewed from above, the outer periphery of the metal terminals on both sides is arc-shaped, and 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 terminal structure for an electronic component is characterized in that it is possible to effectively suppress electromagnetic noise radiation.

[0014] In this way, it becomes possible to suppress electromagnetic noise radiation generated from the metal terminals of electronic components, and in particular, it becomes possible to suppress the total electromagnetic noise radiation from the terminals of chip components that are mounted in large numbers on printed circuit boards of computer equipment and other devices. This makes it possible to prevent the effects of electromagnetic noise on electronic equipment that is susceptible to external noise due to low voltage for energy saving purposes. Furthermore, it leads to a reduction in the amount of material and cost of EMI countermeasures components such as gaskets in electronic equipment, which contributes to CO2 reduction through low voltage and efficient use of resources by reducing EMI countermeasures components, thus contributing to the SDGs.

[0015] Top view and front view in one embodiment of the present invention Top view and front view in another embodiment of the present invention Top view and front view in another embodiment of the present invention Top view and front view in another embodiment of the present invention Top view, front view and metal terminal diagram in another embodiment of the present invention Top view and front view in another embodiment of the present invention Top view and front view in another embodiment of the present invention Top view and front view in another embodiment of the present invention Top view and front view in another embodiment of the present invention Metal terminal diagram in an embodiment of the present invention Metal terminal diagram in an embodiment of the present invention Top view and front view in another embodiment of the present invention Top view and front view of terminal structure without considering electromagnetic noise Schematic diagram of impedance mismatch due to corner wiring

[0016] The embodiments will be described below with reference to the drawings.

[0017] In the drawings, identical elements are denoted by the same reference numeral, and redundant explanations are omitted. Also, the drawings are intended for understanding purposes, and the actual dimensional ratios do not necessarily match those of the actual components. Furthermore, an electronic component called a chip component is a rectangular prism defined by its width, length, and height. It has metal terminals on both sides of the rectangular prism, and a surface below the metal terminals on both sides that is soldered to a metal pad such as on a printed circuit board. When the metal terminals are visible on both sides and the soldering surface is 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 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 outer edge of each metal terminal to its furthest point.

[0018] 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.

[0019] 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. In the top view, the electronic component 1 has a first width (W1) as its vertical height when viewed from above, and in the front view, the electronic component 1 has a first height (H1) as its height when viewed from the side.

[0020] In the top view of Figure 1, the outer circumferences of the two metal terminals on both sides are semicircular arcs, and the radius (R1) of the arc of one metal terminal 2 in the top view and the radius (R2) of the arc of the other metal terminal 3 in the top view are both half the first width (W1) of the electronic component 1.

[0021] In the front view of Figure 1, when the electronic component 1 is viewed from the side so that the two metal terminals on both sides are visible, the outer circumference of the upper part of the two metal terminals on both sides forms a quarter-circular arc, and the radius (R3) of the upper quarter-circle of one metal terminal 2 in the front view and the radius (R4) of the upper quarter-circle of the other metal terminal 3 in the front view are equal to the first height (H1) of the electronic component 1, and the first height (H1) of the electronic component 1 is equal to half the first width (W1) of the electronic component 1.

[0022] Furthermore, in the front view of Figure 1, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0023] Now, let's consider impedance mismatch.

[0024] Figure 13 is a schematic diagram of impedance mismatch caused by corner wiring in a wiring pattern.

[0025] Figure 13 shows the different types of bends required when bending wiring patterns on printed circuit boards and the like.

[0026] Figure 13(a) shows the case where the wiring pattern bends at 90°, Figure 13(b) shows the case where the wiring pattern bends twice at 45°, and Figure 13(c) shows the case where the wiring pattern bends along an arc.

[0027] In the case of Figure 13(a), the impedance changes significantly at the corner because it is turned at a 90° right angle. In this case, the current waveform becomes distorted, resulting in a waveform distortion called reflection, which tends to worsen electromagnetic noise such as EMI.

[0028] In Figure 13(b), the corner wiring is bent twice at 45° angles instead of 90°, which mitigates the change in impedance at the corner compared to the case of 90°.

[0029] In the case of Figure 13(c), the corner wiring is in an arc, so the impedance change at the corner is further mitigated than in the case of 45°.

[0030] Therefore, in corner wiring, 45° wiring results in less impedance change than 90° wiring, and arc-shaped wiring results in less impedance change than 45° wiring, thus improving electromagnetic noise such as EMI.

[0031] Next, we will explain the case where the radiation of EMI electromagnetic noise from metal terminals is not considered, with reference to Figure 12.

[0032] Figure 12 shows a top view and a front view of a terminal structure that does not consider electromagnetic noise. It shows a top view and a front view including a terminal structure of a chip component with metal terminals at both ends, without considering electromagnetic noise. Figure 12(a) is a top view, and Figure 12(b) is a front view.

[0033] In the top view and front view of Figure 12, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3.

[0034] In the top view of Figure 12, the two metal terminals on both sides are rectangular, and in the front view of Figure 12, the two metal terminals on both sides are also rectangular, with each of the two metal terminals on both sides forming a rectangular parallelepiped.

[0035] In this case, the metal terminal has a structure in which the right-angle portion of the rectangular parallelepiped protrudes outward. This causes a change in impedance at this right-angle portion, and when high-frequency currents flow, it can potentially generate a large amount of electromagnetic noise such as EMI. Furthermore, even if the outside of the metal terminal of the chip component is not a right angle but an arc structure, the structure does not maximize the radius of the arc, but rather has a small radius, which can also potentially generate a large amount of electromagnetic noise such as EMI. In addition, the surface area of ​​the metal is also large, which can potentially generate a large amount of electromagnetic noise such as EMI. As a result, the structure is not effective in preventing radiated noise.

[0036] Based on the verification of impedance mismatch due to corner wiring and the verification of the front view and front view of the terminal structure without considering electromagnetic noise, the electronic component having arc-shaped metal terminals in the top view and front view of the present invention has the effect of suppressing electromagnetic noise such as EMI.

[0037] Next, other embodiments will be described with reference to the figures.

[0038] Figure 2 shows a top view and a front view in another embodiment of the present invention. Figure 2(a) is a top view, and Figure 2(b) is a front view.

[0039] In the top view and front view of FIG. 2, an electronic component 1 called a chip component has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has the first width (W1) as its vertical width, and in the front view, the electronic component 1 has the second height (H2) as its horizontal width.

[0040] In the top view of FIG. 2, the outer peripheral portions of the two metal terminals on both sides are semi-circular arcs, which is equivalent to the top view of FIG. 1.

[0041] Here, assuming that in the front view of FIG. 2, the second height (H2) of the electronic component 1 is smaller than half of the first width (W1) of the electronic component, when the electronic component 1 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 arcs, and the radius (R5) of the arc at the upper part of the one metal terminal 2 viewed from the side and the radius (R6) of the arc at the upper part of the other metal terminal 3 viewed from the side are equal to half of the first width (W1) of the electronic component 1.

[0042] Also, here, in the front view of FIG. 2, the lower metal surface of the one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to the metal pads of the printed wiring board or the like by solder or the like.

[0043] In this way, in the top view, the outer peripheral portions of the one metal terminal 2 and the other metal terminal 3 are semi-circular arcs, and in the plan view, the upper parts of the one metal terminal 2 and the other metal terminal 3 are arcs, so that electromagnetic noise such as EMI can be suppressed.

[0044] Furthermore, other embodiments will also be described with reference to the drawings.

[0045] FIG. 3 is a top view and a front view in another embodiment of the present invention. FIG. 3(a) is a top view and FIG. 3(b) is a front view.

[0046] In the top view and front view of FIG. 3, an electronic component 1 called a chip component has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has the first width (W1) as its vertical width, and in the front view, the electronic component 1 has the second height (H2) as its height.

[0047] In the top view of FIG. 3, the outer peripheral portions of the two metal terminals on both sides are semi-circular arcs, which are equivalent to the top views of FIG. 1 and FIG. 2.

[0048] Here, in the front view of FIG. 3, assuming that the second height (H2) of the electronic component 1 is smaller than half of the first width (W1) of the electronic component, 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 elliptical arcs, and each metal terminal has a portion that is 1 / 4 of the elliptical area when an ellipse is cut by the minor axis and the major axis. When the electronic component is viewed from the side so that the two metal terminals on both sides are visible, it has the minor axis of the ellipse including the elliptical arc in the height direction of the metal terminal. The length (L1) of the major axis of the ellipse including the elliptical arc at the upper part of the one metal terminal 2 viewed from the side is equal to the first width (W1) of the electronic component, and the length (L2) of the major axis of the ellipse including the elliptical arc at the upper part of the other metal terminal 3 viewed from the side is equal to the first width (W1) of the electronic component. The length (S1) of the minor axis of the ellipse including the elliptical arc at the upper part of the one metal terminal 2 viewed from the side and the length (S2) of the minor axis of the ellipse including the elliptical arc at the upper part of the other metal terminal 3 viewed from the side are twice the value of the second height (H2) of the electronic component.

[0049] At this time, a circle (a perfect circle or a true circle) is included as a part of the elliptical figure, and an arc is also included as a part of the elliptical arc.

[0050] Also, here, the lower metal surface of the one metal terminal 2 and the lower metal surface of the other metal terminal 3 in the front view of FIG. 3 are connected to the metal pads of the printed wiring board or the like by solder or the like.

[0051] In this way, in the top view, the outer peripheral portions of the one metal terminal 2 and the other metal terminal 3 are semi-circular arcs, and in the plan view, the upper parts of the one metal terminal 2 and the other metal terminal 3 are elliptical arcs, so that it is possible to suppress electromagnetic noise such as EMI.

[0052] Furthermore, other embodiments will also be described with reference to the drawings.

[0053] Figure 4 shows a top view and a front view in another embodiment of the present invention. Figure 4(a) is a top view, and Figure 4(b) is a front view.

[0054] In the top view and front view of Figure 4, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has the first width (W1) as its vertical dimension, and in the front view, the electronic component 1 has the second height (H2) as its height.

[0055] In the top view of Figure 4, the outer circumferences of the two metal terminals on both sides are semicircular arcs, which is the same as in the top views of Figure 1, Figure 2, and Figure 3.

[0056] Here, assuming that in the front view of Figure 4, the second height (H2) of the electronic component 1 is less than half the first width (W1) of the electronic component, when the electronic component 1 is viewed from the side so that the two metal terminals on both sides are visible, the upper part of one metal terminal 2 is an arc, the upper part of the other metal terminal 3 is an elliptical arc, the other metal terminal 3 has a portion that is 1 / 4 of the area of ​​the ellipse when the ellipse is cut by its minor and major axes, when the electronic component is viewed from the side so that the two metal terminals on both sides are visible, the other metal terminal 3 has a minor axis of the ellipse containing the elliptical arc in the height direction, the radius (R5) of the upper part of the arc of the one metal terminal 2 as viewed from the side is half the first width (W1) of the electronic component, the length (L2) of the major axis of the ellipse containing the upper part of the elliptical arc of the other metal terminal 3 as viewed from the side is equal to the first width (W1) of the electronic component 1. When viewed from the side, the length of the minor axis (S2) of the ellipse containing the upper elliptical arc of the other metal terminal 3 is twice the second height (H2) of the electronic component, and when viewed from the side, the other metal terminal 3 occupies one-quarter of the ellipse.

[0057] Furthermore, in the front view of Figure 4, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0058] Thus, in the top view, the outer periphery of one metal terminal 2 and the other metal terminal 3 are semicircular arcs, and in the plan view, the upper part of one metal terminal 2 is an arc and the upper part of the other metal terminal 3 is an elliptical arc, which makes it possible to suppress electromagnetic noise such as EMI.

[0059] Furthermore, other embodiments will be described with reference to the figures.

[0060] Figure 5 shows a top view, a front view, and a metal terminal diagram of another embodiment of the present invention. Figure 5(a) is a top view, Figure 5(b) is a front view, and Figure 5(c) is a metal terminal diagram.

[0061] In the top view and front view of Figure 5, an electronic component 1 called a chip component has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has the second width (W2) as the vertical width when viewed from above, and in the front view, the electronic component 1 has the first height (H1) as its height. In the metal terminal diagram of Figure 5, when the configuration of one metal terminal 2 in the top view of Figure 5 is considered separately, it is shown that one metal terminal 2 is composed of a semicircular portion 4 and a rectangular portion 5 of the metal terminal. Similarly, the other metal terminal 3 is composed of a semicircular portion and a rectangular portion. In this case, at the connection between the semicircular portion 4 and the rectangular portion 5 of the metal terminal in Figure 5, the tangent to the arc of the semicircular portion 4 and the direction of the side of the rectangular portion 5 coincide, so there is no ridge between the semicircular portion 4 and the rectangular portion 5 of the metal terminal in Figure 5.

[0062] In the front view of Figure 5, when the electronic component 1 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 form a quarter-circular arc, which is the same as in the front view of Figure 1.

[0063] Here, assuming that the second width (W2) of the electronic component 1 in the top view of Figure 5 is less than twice the first height (H1) of the electronic component, it is not possible to form a semicircular metal terminal on the top surface between one metal terminal 2 and the other metal terminal 3, where the radius is equal to the first height (H1) of the electronic component 1, considering the size.

[0064] Furthermore, when the electronic component 1 is viewed from above, the outer circumference of the two metal terminals on both sides has a shape that combines a semicircular portion and a rectangular portion, and the radius of the arc of the semicircular portion 4 of one metal terminal as viewed from above (R7) and the radius of the arc of the semicircular portion of the other metal terminal as viewed from above (R8) are equal to half the second width (W2) of the electronic component, and the length of one side (T1) connected to the tangent to the arc in the rectangular portion 5 of one metal terminal as viewed from above (T2) is equal to the first height (H1) of the electronic component minus half the second width (W2) of the electronic component, and the length of the other side of the rectangular portion 5 of one metal terminal as viewed from above and the length of the other side of the rectangular portion of the other metal terminal as viewed from above are This value is equal to the second width (W2) of the aforementioned electronic component.

[0065] Furthermore, in the front view of Figure 5, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0066] Thus, in the top view, the outer periphery of one metal terminal 2 and the other metal terminal 3 have a shape that includes a semicircular arc, and in the plan view, the upper part of one metal terminal 2 and the upper part of the other metal terminal 3 are arcs, which makes it possible to suppress electromagnetic noise such as EMI.

[0067] Furthermore, other embodiments will be described with reference to the figures.

[0068] Figure 6 shows a top view and a front view in another embodiment of the present invention. Figure 6(a) is a top view, and Figure 6(b) is a front view.

[0069] In the top view and front view of Figure 6, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has a second width (W2) as its vertical dimension, and in the front view, the electronic component 1 has a first height (H1) as its height.

[0070] In the front view of Figure 6, when the electronic component 1 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 form a quarter-circular arc, which is equivalent to the front view of Figure 1 and the front view of Figure 5.

[0071] Here, assuming that the second width (W2) of the electronic component 1 in the top view of Figure 6 is less than twice the first height (H1) of the electronic component 1, it is not possible to form a semicircular metal terminal on the top surface between one metal terminal 2 and the other metal terminal 3, with a radius equal to the first height (H1) of the electronic component 1, considering the size.

[0072] When the electronic component 1 is viewed from above, the outer circumferences of the two metal terminals on both sides are elliptical arcs, and each metal terminal occupies half of the area of ​​the ellipse when the ellipse is cut along its minor axis. When the electronic component is viewed from above, the metal terminals have a minor axis of an ellipse containing an elliptical arc in the vertical direction, and the length of the major axis of the ellipse containing the elliptical arc of one metal terminal 2 (L3) as viewed from above, and the length of the major axis of the ellipse containing the elliptical arc of the other metal terminal 3 (L4) as viewed from above are equal to twice the first height (H1) of the electronic component, and the length of the minor axis of the ellipse containing the elliptical arc of one metal terminal 2 (S3) as viewed from above, and the length of the minor axis of the ellipse containing the elliptical arc of the other metal terminal 3 (S4) as viewed from above are equal to the second width (W2) of the electronic component, and when viewed from above, each metal terminal occupies half of the area of ​​its respective ellipse.

[0073] Comparing the metal terminals in Figure 5 and Figure 6, the metal terminals on both sides in Figure 5 are composed of a combination of a semicircular part and a rectangular part when viewed from above, while the metal terminals on both sides in Figure 6 have elliptical arcs when viewed from above.

[0074] In this case, the frequency and intensity of radiated noise will differ depending on the shape of the combination of the semicircular and rectangular parts compared to the elliptical arc, the difference between the radius of the arc in the semicircular part and the length of the major axis and minor axis in the elliptical arc, and the difference in the surface area of ​​the metal terminals on both sides in Figure 5 and the metal terminals on both sides in Figure 6.

[0075] Furthermore, in the front view of Figure 6, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0076] Thus, in the top view, one metal terminal 2 and the other metal terminal 3 have an elliptical arc shape, and in the plan view, the upper part of one metal terminal 2 and the upper part of the other metal terminal 3 have a circular arc shape, which makes it possible to suppress electromagnetic noise such as EMI.

[0077] Furthermore, other embodiments will be described with reference to the figures.

[0078] Figure 7 shows a top view and a front view in another embodiment of the present invention. Figure 7(a) is a top view, and Figure 7(b) is a front view.

[0079] In the top view and front view of Figure 7, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has a second width (W2) as its vertical dimension, and in the front view, the electronic component 1 has a first height (H1) as its height.

[0080] In the front view of Figure 7, when the electronic component 1 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 form a quarter-circular arc, which is equivalent to the front view of Figure 1, the front view of Figure 5, and the front view of Figure 6.

[0081] Here, assuming that the second width (W2) of the electronic component 1 in the top view of Figure 7 is less than twice the first height (H1) of the electronic component, it is not possible to form a semicircular metal terminal on the top surface between one metal terminal 2 and the other metal terminal 3, with a radius equal to the first height (H1) of the electronic component 1, considering the size.

[0082] Here, in the top view of Figure 7, when the electronic component 1 is viewed from above, the outer circumference of one metal terminal 2 has a shape that combines a semicircular portion and a rectangular portion, the radius (R7) of the arc of the semicircular portion of the one metal terminal 2 as viewed from above is half the second width (W2) of the electronic component, the length (T1) of one side connected to the tangent of the arc in the rectangular portion of the one metal terminal 2 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 2 as viewed from above is equal to the second width (W2) of the electronic component, the outer circumference of the other metal terminal 3 is an elliptical arc, the other metal terminal 3 has a portion that is half the area of ​​the ellipse when the ellipse is cut along its minor axis, and when the electronic component is viewed from above, The other metal terminal 3 has a minor axis of an ellipse containing an elliptical arc in the vertical direction, the length of the major axis of the ellipse containing the elliptical arc of the other metal terminal 3 as viewed from above (L4) is equal to twice the first height (H1) of the electronic component, and the length of the minor axis of the ellipse containing the elliptical arc of the other metal terminal 3 as viewed from above (S4) is equal to the second width (W2) of the electronic component.

[0083] Comparing the metal terminals in Figure 5, Figure 6, and Figure 7, the metal terminals on both sides of Figure 5 are composed of a combination of a semicircular and a rectangular section when viewed from above, while the metal terminals on both sides of Figure 6 have elliptical arcs when viewed from above. One of the metal terminals in Figure 7 is composed of a combination of a semicircular and a rectangular section when viewed from above, while the other metal terminal has an elliptical arc when viewed from above.

[0084] In this case, the frequency and intensity of radiated noise will differ depending on the shape of the combination of the semicircular and rectangular parts compared to the elliptical arc, the difference between the radius of the arc in the semicircular part and the lengths of the major and minor axes in the elliptical arc, and the difference in the surface area of ​​the metal terminals on both sides in Figure 5, Figure 6, and Figure 7.

[0085] Furthermore, in the front view of Figure 7, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0086] Thus, in the top view, the outer circumference of one metal terminal 2 has a shape that includes a semicircular arc, and the other metal terminal 3 has an elliptical arc shape. In the plan view, the upper parts of one metal terminal 2 and the other metal terminal 3 are arcs, which makes it possible to suppress electromagnetic noise such as EMI.

[0087] Furthermore, other embodiments will be described with reference to the figures.

[0088] Figure 8 shows a top view and a front view in another embodiment of the present invention. Figure 8(a) is a top view, and Figure 8(b) is a front view.

[0089] In the top view and front view of Figure 8, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has a first width (W1) as its vertical dimension, and in the front view, the electronic component 1 has a first height (H1) as its height.

[0090] Here, we assume that the first thickness (T3) of one metal terminal 2 of the electronic component 1 and the second thickness (T4) of the other metal terminal 3 of the electronic component 1 are smaller than half the first width (W1) of the electronic component 1 and the first height (H1) of the electronic component 1.

[0091] In this case, when the electronic component 1 is viewed from above, the two metal terminals on both sides have a shape that is the sum of one quarter-circular portion and rectangular portion and the other quarter-circular portion. When the electronic component 1 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-circular portion and the lower part is a rectangular portion.

[0092] Figure 9 shows that, in the top view of Figure 8, when the electronic component 1 is viewed from above, one metal terminal 2 is composed of one quarter-circular portion 6 of the metal terminal, one rectangular portion 7 of the metal terminal, and the other quarter-circular portion 8 of the metal terminal. Similarly, the other metal terminal 3 in the top view is composed of one quarter-circular portion, one rectangular portion, and the other quarter-circular portion of the metal terminal.

[0093] Figure 10 shows that, in the front view of Figure 8, when the electronic component is viewed from the front, one metal terminal 2 is composed of a quarter-circular portion 9 at the top of the metal terminal and a rectangular portion 10 at the bottom of the metal terminal. Similarly, the other metal terminal 3 in the front view is composed of a quarter-circular portion at the top of the other metal terminal and a rectangular portion at the bottom of the other metal terminal.

[0094] Here, the radius (R9) of one quarter-circular portion 6 of the one metal terminal as viewed from above, the radius (R10) of the other quarter-circular portion 8 of the one metal terminal as viewed from above, and the radius (R13) of the upper quarter-circular portion 9 of the one metal terminal as viewed from the side are equal to the first thickness (T3) of one metal terminal 2 of the electronic component. Similarly, 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, and the radius (R14) of the upper quarter-circular portion of the other metal terminal as viewed from the side are equal to the second thickness (T4) of the other metal terminal of the electronic component.

[0095] Furthermore, the length of one side of the rectangular portion 7 of the one metal terminal, as viewed from above, that connects to the tangent of the arc is equal to the first width (W1) of the electronic component 1 minus twice the first thickness (T3) of the one metal terminal 2 of the electronic component. The length of the other side of the rectangular portion 7 of the one metal terminal, as viewed from above, that is perpendicular to one side is equal to the first thickness (T3) of the one metal terminal 2 of the electronic component. Similarly, the length of one side of the rectangular portion of the other metal terminal 3, as viewed from above, that connects to the tangent of the arc is equal to the first width (W1) of the electronic component minus twice the second thickness (T4) of the other metal terminal 3 of the electronic component. The length of the other side of the rectangular portion of the other metal terminal, as viewed from above, that is perpendicular to one side is equal to the second thickness (T4) of the other metal terminal 3 of the electronic component.

[0096] Furthermore, the length of one side connected to the tangent to the arc in the lower rectangular portion 10 of one metal terminal as viewed from the side is equal to the first height (H1) of the electronic component minus the first thickness (T3) of the one metal terminal 2 of the electronic component, the length of the other side perpendicular to one side of the lower rectangular portion 10 of one metal terminal as viewed from the side is equal to the first thickness (T3) of the one metal terminal 2 of the electronic component, similarly, the length of one side connected to the tangent to the arc in the lower rectangular portion of the other metal terminal as viewed from the side is equal to the first height (H1) of the electronic component minus the second thickness (T4) of the other metal terminal 3 of the electronic component, the length of the other side perpendicular to one side of the lower rectangular portion of the other metal terminal as viewed from the side is equal to the second thickness (T4) of the other metal terminal 3 of the electronic component.

[0097] Comparing the metal terminals in Figure 5, Figure 6, Figure 7, and Figure 8, the metal terminals on both sides of Figure 5 are composed of a combination of a semicircular part and a rectangular part when viewed from above. The metal terminals on both sides of Figure 6 have elliptical arcs when viewed from above. One of the metal terminals in Figure 7 is composed of a combination of a semicircular part and a rectangular part when viewed from above, while the other metal terminal has an elliptical arc when viewed from above. The metal terminals on both sides of Figure 8 have a shape that combines one semicircular part, a rectangular part, and the other semicircular part when viewed from above.

[0098] In this case, the frequency and intensity of radiated noise will differ depending on the shape differences between the combination of a semicircular and rectangular section and an elliptical arc, the combination of one quarter-circular section, a rectangular section, and the other quarter-circular section, the differences in the radius of the arc of the semicircular section and the radius of the arc of the quarter-circular section, the length of the major axis and the length of the minor axis of the elliptical arc, and the differences in the surface area of ​​the metal terminals on both sides in Figure 5, Figure 6, Figure 7, and Figure 8.

[0099] Furthermore, in the front view of Figure 8, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0100] Thus, in the top view, the two metal terminals on both sides have a shape that combines one quarter-circular section, one rectangular section, and the other quarter-circular section. In the plan view, the upper part of the two metal terminals on both sides is a quarter-circular section, and the lower part is a rectangular section, which makes it possible to suppress electromagnetic noise such as EMI.

[0101] Furthermore, other embodiments will be described with reference to the figures.

[0102] Figure 11 shows a top view and a front view in another embodiment of the present invention. Figure 11(a) is a top view, and Figure 11(b) is a front view.

[0103] In the top view and front view of Figure 11, an electronic component 1, called a chip component, has one metal terminal 2 and the other metal terminal 3. In the top view, the electronic component 1 has a first width (W1) as its vertical dimension, and in the front view, the electronic component 1 has a first height (H1) as its height.

[0104] Here, we assume that the first thickness (T3) of one metal terminal 2 of the electronic component 1 and the second thickness (T4) of the other metal terminal 3 of the electronic component 1 are smaller than half the first width (W1) of the electronic component 1 and the first height (H1) of the electronic component 1.

[0105] In this case, when the electronic component 1 is viewed from above, the outer circumference of the two metal terminals on both sides is an elliptical arc, and each metal terminal has half the area of ​​the ellipse when the ellipse is cut along its major axis, and when the electronic component is viewed from above, the minor axis of the ellipse containing the elliptical arc is in the vertical direction of the metal terminal, and 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 elliptical arcs, and each metal terminal has one-quarter of the area of ​​the ellipse when the ellipse is cut along its minor and major axes, and when the electronic component is viewed from the side so that the two metal terminals on both sides are visible, the major axis of the ellipse containing the elliptical arc is in the height direction of the metal terminal.

[0106] At this time, the length of the major axis of the ellipse containing the elliptical arc of one metal terminal 2 as viewed from above (L5) and the length of the major axis of the ellipse containing the elliptical arc of the other metal terminal 3 as viewed from above (L6) are equal to the first width (W1) of the electronic component, and the length of the major axis of the ellipse containing the upper elliptical arc of one metal terminal 2 as viewed from the side (L7) and the length of the major axis of the ellipse containing the upper elliptical arc of the other metal terminal 3 as viewed from the side (L8) are equal to twice the first height (H1) of the electronic component.

[0107] Furthermore, the length of the minor axis of the ellipse containing the elliptical arc of one metal terminal 2 as viewed from above (S5) and the length of the minor axis of the ellipse containing the elliptical arc of the upper part of one metal terminal 2 as viewed from the side (S7) are equal to twice the first thickness (T3) of one metal terminal 2 of the electronic component, and the length of the minor axis of the ellipse containing the elliptical arc of the other metal terminal 3 as viewed from above (S6) and the length of the minor axis of the ellipse containing the elliptical arc of the upper part of the other metal terminal 3 as viewed from the side (S8) are equal to twice the second thickness (T4) of the other metal terminal 3 of the electronic component.

[0108] Furthermore, in the front view of Figure 11, the lower metal surface of one metal terminal 2 and the lower metal surface of the other metal terminal 3 are connected to a metal pad on a printed circuit board or the like by soldering.

[0109] Thus, in the top view, one metal terminal 2 and the other metal terminal 3 have an elliptical arc shape, and in the plan view, the upper part of one metal terminal 2 and the upper part of the other metal terminal 3 have an elliptical arc shape, which makes it possible to suppress electromagnetic noise such as EMI.

[0110] As described above, the terminal structure for electronic components for suppressing electromagnetic noise radiation of the present invention has been explained with reference to examples. By combining arcs, elliptical arcs, rectangles, etc., as shown in the top view and front view of multiple examples, and applying the resulting shape to the metal terminals of electronic components, it is possible to suppress electromagnetic noise such as EMI.

[0111] In this explanation, we have focused on electronic components known as chip components, but electronic components also include capacitive components, inductor components, and resistor components, and the present invention can be applied to each of these components.

[0112] Furthermore, since the electronic components to which this invention can be applied are often mounted in large numbers on printed circuit boards, such as those in computer equipment, it becomes possible to suppress the total electromagnetic noise radiation from the metal terminals of these mounted chip components. This makes it possible to prevent electromagnetic noise from affecting electronic equipment that is susceptible to external noise and has been subjected to low voltage for energy saving purposes.

[0113] Furthermore, this also leads to a reduction in materials and costs for EMI countermeasures components such as gaskets in electronic equipment, which contributes to the direction of the SDGs by reducing CO2 emissions through lower voltage and by making efficient use of resources through the reduction of EMI countermeasures components.

[0114] In the terminal structure for electronic components that suppresses electromagnetic noise radiation according to the present invention, by applying shapes such as circular arcs and elliptical arcs to the shape of the metal terminals of electronic components, it becomes possible to suppress electromagnetic noise radiation generated from the metal terminals of electronic components. In particular, it becomes possible to suppress the total electromagnetic noise radiation from the terminals of chip components that are mounted in large numbers on printed circuit boards of computer equipment and the like. This makes it possible to prevent the effects of electromagnetic noise on electronic equipment that is susceptible to external noise and has been lowered in voltage for energy saving purposes. Furthermore, it leads to a reduction in the amount of material and cost of EMI countermeasures components such as gaskets in electronic equipment, and thus contributes to the direction of the SDGs, such as CO2 reduction through lower voltage and efficient use of resources by reducing EMI countermeasures components.

[0115] 1... Electronic component 2... One metal terminal 3... The other metal terminal 4... Semicircular portion of one metal terminal 5... Rectangular portion of one metal terminal 6... One quartercircular portion of one metal terminal 7... Rectangular portion of one metal terminal 8... The other quartercircular portion of one metal terminal 9... Upper quartercircular portion of one metal terminal 10... Lower rectangular portion of one metal terminal

Claims

1. A terminal structure for an electronic component, wherein a rectangular parallelepiped-shaped electronic component called a chip component is provided with metal terminals having sides of the same shape as the sides on the entire surface of both sides, wherein the electronic component has a first width (W1) as its vertical width and a first height (H1) as its height, and the first height (H1) is half the value of the first width (W1), and when the electronic component is viewed from above, the outer circumferences of the metal terminals on both sides are semicircular arcs, and the radius (R1) of the arc of one metal terminal viewed from above and the radius (R2) of the arc of the other metal terminal viewed from above are half the value of the first width (W1), which is the vertical width of the electronic component, and 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 quarter-circular arcs, and the radius (R3) of the upper quarter-circle of one metal terminal viewed from the side is, An electronic component terminal structure for suppressing electromagnetic noise radiation, characterized in that the radius (R4) of the upper quarter circle of the other metal terminal, as viewed from the side, is the same as the first height (H1), which is the height of the electronic component.

2. A terminal structure for an electronic component, wherein a rectangular parallelepiped-shaped electronic component called a chip component is provided with metal terminals having sides of the same shape as the sides on the entire surface of both sides, wherein the electronic component has a first width (W1) as its vertical width and a second height (H2) as its height, the second height (H2) being less than half the value of the first width (W1), when the electronic component is viewed from above, the outer circumferences of the metal terminals on both sides are semicircular arcs, the radius (R1) of the arc of one metal terminal as viewed from above and the radius (R2) of the arc of the other metal terminal as viewed from above are both half the value of the first width (W1), which is the vertical width of the electronic component, 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 arcs, the radius (R5) of the upper part of the arc of one metal terminal as viewed from the side and An electronic component terminal structure for suppressing electromagnetic noise radiation, characterized in that the radius (R6) of the upper arc of the other metal terminal, as viewed from the side, is half the first width (W1) of the electronic component.

3. A terminal structure for an electronic component, wherein a rectangular electronic component called a chip component is provided with metal terminals having sides of the same shape as the sides on the entire surface of both sides, wherein the electronic component has a first width (W1) as its vertical width and a second height (H2) as its height, the second height (H2) being less than half the value of the first width (W1), when the electronic component is viewed from above, the outer circumferences of the metal terminals on both sides are semicircular arcs, the radius (R1) of the arc of one metal terminal as viewed from above and the radius (R2) of the arc of the other metal terminal as viewed from above are both half the value of the first width (W1), which is the vertical width of the electronic component, 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 elliptical arcs, and they have 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, A terminal structure for an electronic component to suppress electromagnetic noise radiation, characterized in that, when the electronic component is viewed from the side so that the two metal terminals on both sides are visible, the electronic component has an ellipse with a minor axis containing an elliptical arc in the height direction of the metal terminals, the length of the major axis of the ellipse containing the elliptical arc at the top of one of the metal terminals as viewed from the side (L1) and the length of the major axis of the ellipse containing the elliptical arc at the top of the other metal terminal as viewed from the side (L2) are equal to the first width (W1) of the electronic component, and the length of the minor axis of the ellipse containing the elliptical arc at the top of one of the metal terminals as viewed from the side (S1) and the length of the minor axis of the ellipse containing the elliptical arc at the top of the other metal terminal as viewed from the side (S2) are twice the second height (H2) of the electronic component.

4. A terminal structure for an electronic component, wherein a rectangular parallelepiped-shaped electronic component called a chip component is provided with metal terminals having sides of the same shape as the sides on the entire surface of both sides, wherein the electronic component has a first width (W1) as its vertical width and a second height (H2) as its height, the second height (H2) is less than half the value of the first width (W1), when the electronic component is viewed from above, the outer circumferences of the metal terminals on both sides are semicircular arcs, the radius (R1) of the arc of one metal terminal as viewed from above and the radius (R2) of the arc of the other metal terminal as viewed from above are both half the value of the first width (W1), which is the vertical width of the electronic component, when the electronic component is viewed from the side so that both metal terminals on both sides are visible, the upper part of one of the metal terminals is an arc, the radius (R5) of the upper part of the arc of one of the metal terminals as viewed from the side is A terminal structure for an electronic component to suppress electromagnetic noise radiation, characterized in that the first width (W1) of the electronic component is half the value of the other metal terminal, the upper part of the other metal terminal is an elliptical arc and has a portion of the area of ​​the ellipse when the ellipse containing the elliptical arc is cut along the minor axis and major axis, when the electronic component is viewed from the side so that the two metal terminals on both sides are visible, the minor axis of the ellipse containing the elliptical arc is in the height direction of the metal terminal, the length of the major axis (L2) of the ellipse containing the elliptical arc at the top of the other metal terminal as viewed from the side is equal to the first width (W1) of the electronic component, and the length of the minor axis (S2) of the ellipse containing the elliptical arc at the top of the other metal terminal as viewed from the side is twice the value of the second height (H2) of the electronic component.

5. A terminal structure for an electronic component, wherein a rectangular parallelepiped-shaped electronic component called a chip component is provided with metal terminals having sides of the same shape as the sides on the entire surface of both sides of the electronic component, wherein the electronic component has a second width (W2) as its vertical width 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 electronic component is viewed from above, the metal terminals on both sides have an elliptical arc on their outer circumference with a minor axis in the vertical width direction of the metal terminal, the metal terminal has half the area of ​​the ellipse when the ellipse containing the elliptical arc is cut along the minor axis, the length of the major axis (L3) of the ellipse containing the elliptical arc of one metal terminal as viewed from above, and the length of the major axis (L4) of the ellipse containing the elliptical arc of the other metal terminal as viewed from above are equal to twice the value of the first height (H1) of the electronic component, and the length of the minor axis (S3) of the ellipse containing the elliptical arc of one metal terminal as viewed from above, A terminal structure for an electronic component to suppress electromagnetic noise radiation, characterized in that the length of the minor axis (S4) of the elliptical arc of the other metal terminal as viewed from above is equal to the second width (W2) of the electronic component, 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 form a quarter-circular arc, the radius (R3) of the upper quarter-circle of one metal terminal as viewed from the side and the radius (R4) of the upper quarter-circle of the other metal terminal as viewed from the side are the same as the first height (H1) of the electronic component, and the first height (H1) of the electronic component is half the value of the first width (W1) of the electronic component.

6. A terminal structure for an electronic component, wherein a metal terminal having the same shape as the side surface is provided on the entire surface of both sides of a rectangular parallelepiped-shaped electronic component called a chip component, wherein the electronic component has a first width (W1) as its vertical width and a first height (H1) as its height, and when the electronic component is viewed from above, the outer periphery of the metal terminals on both sides has an elliptical arc with its major axis in the vertical width direction of the metal terminal, and the metal terminals on both sides have half the area of ​​the ellipse when the ellipse containing the elliptical arc, as viewed from above, is cut along its major axis, and when the electronic component is viewed from the side so that the metal terminals on both sides are visible, the upper part of the metal terminals on both sides has an elliptical arc with its major axis in the height direction, and the metal terminals on both sides have 1 / 4 of the area of ​​the ellipse when the ellipse containing the elliptical arc, as viewed from the side, is cut along its minor axis and major axis, and one metal terminal of the electronic component has a first thickness (T3), and the other metal terminal of the electronic component has a second thickness (T4). The first thickness (T3) of one metal terminal of the electronic component and the second thickness (T4) of the other metal terminal of the electronic component are less than half the first width (W1) of the electronic component and less than the first height (H1) of the electronic component, the length of the major axis of the ellipse containing the elliptical arc of the one metal terminal as viewed from above (L5) and the length of the major axis of the ellipse containing the elliptical arc of the other metal terminal as viewed from above (L6) are equal to the first width (W1) of the electronic component, the length of the major axis of the ellipse containing the upper elliptical arc of the one metal terminal as viewed from the side (L7) and the length of the major axis of the ellipse containing the upper elliptical arc of the other metal terminal as viewed from the side (L8) are equal to twice the first height (H1) of the electronic component, and the length of the minor axis of the ellipse containing the elliptical arc of the one metal terminal as viewed from above (S5), A terminal structure for an electronic component to suppress electromagnetic noise radiation, characterized in that the length of the minor axis of the ellipse containing the upper elliptical arc of one of the metal terminals as viewed from the side (S7) is equal to twice the first thickness (T3) of one of the metal terminals 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), and 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) are equal to twice the second thickness (T4) of the other metal terminal of the electronic component.

7. A terminal structure for an electronic component, wherein a rectangular electronic component called a chip component is provided with metal terminals having sides of the same shape as the sides on the entire surface of both sides, wherein the electronic component has a second width (W2) as its vertical width 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 electronic component is viewed from above, the outer periphery of the metal terminals on both sides has a shape that is the sum of the outermost semicircular part and rectangular part, the radius of the arc of the semicircular part of one metal terminal as viewed from above (R7) and the radius of the arc of the semicircular part of the other metal terminal as viewed from above (R8) are both half the value of the second width (W2) of the electronic component, the length of one side (T1) connected to the tangent to the arc of the rectangular part of one metal terminal as viewed from above, A terminal structure for an electronic component to suppress electromagnetic noise radiation, characterized in that, when the electronic component is viewed from above, the length (T2) of one side connected to the tangent of the arc in the rectangular portion of the other metal terminal is the value obtained by subtracting half of the second width (W2) of the electronic component from the first height (H1) of the electronic component; the length of the other side in the rectangular portion of the one metal terminal viewed from above is equal to the second width (W2) of the electronic component; when the electronic component is viewed from the side so that both 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 the one metal terminal viewed from the side is equal to the radius (R4) of the upper quarter-circle of the other metal terminal viewed from the side is the same as the first height (H1), which is the height of the electronic component.

8. A terminal structure for an electronic component, wherein a metal terminal having the same shape as the side surface is provided on the entire surface of both sides of a rectangular parallelepiped electronic component called a chip component, wherein the electronic component has a second width (W2) as its vertical width and a first height (H1) as its height, the second width (W2) is less than twice the first height (H1), when the electronic component is viewed from above, the outer periphery of one of the metal terminals has a shape that is the sum of its outermost semicircular portion and rectangular portion, the radius (R7) of the arc of the semicircular portion of one of the metal terminals viewed from above is half the second width (W2) of the electronic component, and the length (T1) of one side connected to the tangent of the arc in the rectangular portion of one of the metal terminals viewed from above is the first height (H1) of the electronic component minus half the second width (W2) of the electronic component. The length of the other side of the rectangular portion of one metal terminal as viewed from above is equal to the second width (W2) of the electronic component, the other metal terminal has an elliptical arc with its 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 is equal to twice the first height (H1) of the electronic component, the length of the minor axis (S4) of the ellipse containing the elliptical arc of the other metal terminal as viewed from above is equal to the second width (W2) of the electronic component, when the electronic component is viewed from the side so that both metal terminals on both sides are visible, the upper parts of both metal terminals on both sides are in the shape of a quarter-circular arc, the radius (R3) of the upper quarter-circle of one metal terminal as viewed from the side, An electronic component terminal structure for suppressing electromagnetic noise radiation, characterized in that the radius (R4) of the upper quarter circle of the other metal terminal, as viewed from the side, is the same as the first height (H1), which is the height of the electronic component.

9. A terminal structure for an electronic component, wherein a rectangular electronic component called a chip component has metal terminals on both sides of the entire surface having sides of the same shape as the sides, wherein the electronic component has a first width (W1) as its vertical width and a first height (H1) as its height, the first thickness (T3) of one metal terminal of the electronic component and the second thickness (T4) of the other metal terminal of the electronic component are smaller than half the first width (W1) of the electronic component and the first height (H1) of the electronic component, when the electronic component is viewed from above, the two metal terminals on both sides have a shape that is the sum of one quarter-circular portion and one rectangular portion and the other quarter-circular portion, when the 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-circular portion and the lower part is a rectangular portion, the radius (R9) of one quarter-circular portion of one of the metal terminals viewed from above, The radius of the other quarter-circular portion of the one metal terminal as viewed from above (R10) and the radius of the upper quarter-circular portion of the one metal terminal as viewed from the side (R13) are equal to the first thickness (T3) of the one metal terminal of the electronic component; the radius of the one quarter-circular portion of the other metal terminal as viewed from above (R11), the radius of the other quarter-circular portion of the other metal terminal as viewed from above (R12), and the radius of the upper quarter-circular portion of the other metal terminal as viewed from the side (R14) are equal to the second thickness (T4) of the other metal terminal of the electronic component; and 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 perpendicular to one side of the rectangular portion of the one metal terminal as viewed from above is equal to the first thickness (T3) of the one metal terminal of the electronic component, the length of the side connected to the tangent of the arc in the rectangular portion of the other metal terminal as viewed from above is equal to the first width (W1) of the electronic component minus twice the second thickness (T4) of the other metal terminal of the electronic component, the length of the other side perpendicular to one side of the rectangular portion of the other metal terminal as viewed from above is equal to the second thickness (T4) of the other metal terminal of the electronic component,A terminal structure for an electronic component to suppress electromagnetic noise radiation, characterized in that: the length of one side connected to the tangent to the arc in the lower rectangular portion of one metal terminal as viewed from the side is the value obtained by subtracting the first thickness (T3) of one metal terminal of the electronic component from the first height (H1) of the electronic component; the length of the other side perpendicular to one side of the lower rectangular portion of one metal terminal as viewed from the side is equal to the first thickness (T3) of one metal terminal of the electronic component; the length of one side connected to the tangent to the arc in the lower rectangular portion 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; and the length of the other side perpendicular to one side of the lower rectangular portion 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.

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