Source: https://patents.google.com/patent/KR102070233B1/en
Timestamp: 2020-08-09 15:59:29
Document Index: 721225348

Matched Legal Cases: ['art 724', 'art 724', 'art 724', 'art 724', 'art 724', 'art 724', 'art 724', 'art 724', 'art 724']

KR102070233B1 - Composite electronic component, board for mounting the same and packing unit thereof - Google Patents
Composite electronic component, board for mounting the same and packing unit thereof Download PDF
KR102070233B1
KR102070233B1 KR1020140155179A KR20140155179A KR102070233B1 KR 102070233 B1 KR102070233 B1 KR 102070233B1 KR 1020140155179 A KR1020140155179 A KR 1020140155179A KR 20140155179 A KR20140155179 A KR 20140155179A KR 102070233 B1 KR102070233 B1 KR 102070233B1
KR1020140155179A
KR20160055424A (en
2014-11-10 Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
2014-11-10 Priority to KR1020140155179A priority Critical patent/KR102070233B1/en
2016-05-18 Publication of KR20160055424A publication Critical patent/KR20160055424A/en
2020-01-28 Publication of KR102070233B1 publication Critical patent/KR102070233B1/en
239000002131 composite material Substances 0.000 title claims abstract description 117
239000000919 ceramic Substances 0.000 claims abstract description 200
239000003985 ceramic capacitor Substances 0.000 claims abstract description 116
239000003990 capacitor Substances 0.000 description 5
The present invention provides a laminate including a first ceramic body having a plurality of dielectric layers and internal electrodes disposed to face each other with the dielectric layers interposed therebetween, and first and second external electrodes disposed at both ends of the first ceramic body. First and second terminal electrodes disposed under the ceramic capacitor and the multilayer ceramic capacitor and disposed at both ends of the second ceramic body and the second ceramic body made of ceramic, and connected to the first and second external electrodes. A ceramic chip comprising a composite comprising a combined, wherein the longitudinal length of the multilayer ceramic capacitor and the ceramic chip relates to a different composite electronic component.
Composite electronic component, board for mounting the same and packing unit
The present invention relates to a composite electronic component, a mounting board and a package of the composite electronic component.
Multilayer ceramic capacitors, which are one of the multilayer chip electronic components, include imaging devices such as liquid crystal displays (LCDs) and plasma display panels (PDPs), computers, and personal digital assistants (PDAs). And a chip type capacitor mounted on a circuit board of various electronic products such as a mobile phone to charge or discharge electricity.
The multilayer ceramic capacitor (MLCC) can be used as a component of various electronic devices due to its small size, high capacity, and easy mounting.
Since the dielectric layer has piezoelectricity and electrodistortion, a piezoelectric phenomenon may occur between the internal electrodes when a direct current or alternating voltage is applied to the multilayer ceramic capacitor, thereby causing vibration.
The vibration is transmitted to the circuit board on which the multilayer ceramic capacitor is mounted through an external electrode of the multilayer ceramic capacitor to generate a vibration sound that becomes a noise while the entire circuit board becomes an acoustic reflection surface.
The vibrating sound may correspond to an audible frequency in the range of 20 to 20,000 Hz, which causes discomfort to a person, and thus, the uncomfortable vibrating sound to a person is called acoustic noise.
As the acoustic noise is recently slimmed and miniaturized, the acoustic noise appears to be sufficiently recognizable by the user as it is used in an environment in which a high voltage and its voltage change are large in conjunction with a printed circuit board.
Therefore, there is a demand for new products with reduced acoustic noise.
Japanese Patent Registration Publication No. 5012658
The present specification is to provide a composite electronic component, a mounting board and a package of the composite electronic component that can reduce the acoustic noise (acoustic noise).
According to an embodiment of the present invention, a first ceramic body including a plurality of dielectric layers and internal electrodes disposed to face each other with the dielectric layers interposed therebetween, and first and second external electrodes disposed at both ends of the first ceramic body are stacked. First and second electrodes disposed on both bottoms of the multilayer ceramic capacitor and the multilayer ceramic capacitor, the second ceramic body made of ceramic and the second ceramic body being connected to the first and second external electrodes; A composite chip including a ceramic chip including a second terminal electrode may be coupled to each other, and the multilayer ceramic capacitor and the ceramic chip may have different lengths in a longitudinal direction thereof.
The ceramic may include a dielectric, and the internal electrodes may be stacked vertically with respect to the mounting surface of the composite.
Another embodiment of the present invention includes a printed circuit board having a plurality of electrode pads thereon, a composite electronic component installed on the printed circuit board, and a solder connecting the electrode pad and the composite electronic component. A multilayer ceramic capacitor including a first ceramic body having a plurality of dielectric layers and internal electrodes disposed to face each other with the dielectric layer interposed therebetween, and first and second external electrodes disposed at both ends of the first ceramic body; A second ceramic body disposed under the multilayer ceramic capacitor and disposed at both ends of the second ceramic body and connected to the first and second external electrodes, respectively; The ceramic chip includes a composite bonded to each other, and the longitudinal lengths of the multilayer ceramic capacitor and the ceramic chip are different from each other. It provides a mounting substrate of the composite electronic component.
Still another embodiment of the present invention includes a packaging sheet in which a housing part for accommodating the composite electronic component is formed, wherein the ceramic chip is disposed to face the bottom of the housing part, and the internal electrode is based on the bottom surface of the housing part. This package provides a package of composite electronic components arranged vertically.
According to one embodiment of the present invention, the stress or vibration due to the piezoelectricity of the multilayer ceramic capacitor is alleviated by the ceramic chip, thereby reducing the amount of acoustic noise generated in the circuit board.
In addition, the internal electrodes of the multilayer ceramic capacitor are stacked in the direction perpendicular to the mounting surface, and the surface in the length-width direction where the piezoelectric displacement amount is small is bonded to the ceramic chip, so that stress and vibration generated in the multilayer ceramic capacitor are transmitted to the ceramic chip. By minimizing the amount of noise, acoustic noise can be reduced.
In addition, by forming a step between the multilayer ceramic capacitor and the ceramic chip, the solder can be prevented from being formed in the thickness direction of the multilayer ceramic capacitor, thereby minimizing vibration transmission to the substrate by the solder.
In addition, when mechanical stress is applied from the outside, the stress transfer to the multilayer ceramic capacitor is suppressed by the ceramic chip and the conductive resin layer used as the terminal electrode of the ceramic chip, thereby preventing damage by the crack of the multilayer ceramic capacitor. have.
1 is a perspective view schematically showing a composite electronic component according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view illustrating the composite electronic component of FIG. 1 separated into a multilayer ceramic capacitor and a ceramic chip.
FIG. 3 is an exploded perspective view showing another embodiment of the composite electronic component of FIG. 1 separated into a multilayer ceramic capacitor and a ceramic chip.
FIG. 4 is a perspective view schematically illustrating a cut portion of the multilayer ceramic capacitor of the composite electronic component of FIG. 1.
5 is a perspective view illustrating a manufacturing process of a ceramic chip of the multilayer ceramic electronic component of FIG. 1.
6 is a perspective view schematically showing a composite electronic component according to a second embodiment of the present invention.
7 is a perspective view schematically showing a composite electronic component according to a third embodiment of the present invention.
8 is a perspective view schematically showing a composite electronic component according to a fourth embodiment of the present invention.
9 is a perspective view illustrating a board in which the composite electronic component of FIG. 1 is mounted on a printed circuit board.
FIG. 10 is a cross-sectional view of the composite electronic component of FIG. 9 cut in the longitudinal direction.
FIG. 11 is a perspective view illustrating a board in which the composite electronic component of FIG. 6 is mounted on a printed circuit board.
12 is a perspective view illustrating a board in which the composite electronic component of FIG. 7 is mounted on a printed circuit board.
FIG. 13 is a perspective view illustrating a board in which the composite electronic component of FIG. 8 is mounted on a printed circuit board.
14 is a schematic perspective view illustrating a state in which the composite electronic component of FIG. 1 is mounted on a package.
FIG. 15 is a schematic cross-sectional view showing the package of FIG. 14 wound in a reel shape. FIG.
16 is a graph comparing acoustic noise according to an embodiment of the present invention and a comparative example.
17 is a graph comparing acoustic noise according to another embodiment of the present invention and a comparative example.
Embodiments of the invention may be modified in many different forms and should not be construed as limited to the embodiments set forth herein. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity, and the elements denoted by the same reference numerals in the drawings are the same elements.
Referring to FIG. 1, in a composite electronic component according to an exemplary embodiment of the present disclosure, a 'length direction' is a 'L' direction of FIG. 1, a 'width direction' is a 'W' direction, and a 'thickness direction' is 'T' Will be defined as the direction. Here, the 'thickness direction' may be used in the same concept as the stacking direction of the dielectric layer of the capacitor.
Meanwhile, in one embodiment of the present invention, the composite electronic component may have a first side surface, a second side surface, a third side surface, and a fourth side surface in the longitudinal direction connecting the upper and lower surfaces facing each other and the upper and lower surfaces. Although there is no restriction | limiting in particular in the shape of the said composite electronic component, As shown, it may be a hexahedron shape.
In addition, the lengthwise first side surface, the second side surface, the third side surface, and the fourth side surface of the composite electronic component may have a lengthwise first side surface, a second side surface, and a width of the multilayer ceramic capacitor and the ceramic chip, as described later. Direction Defined as the plane in the same direction as the third and fourth side surfaces.
Meanwhile, the composite electronic component is a form in which a multilayer ceramic capacitor and a ceramic chip are combined. When the ceramic chip is coupled below the multilayer ceramic capacitor, an upper surface of the composite electronic component is defined as an upper surface of the multilayer ceramic capacitor. The lower surface of the electronic component may be defined as the lower surface of the ceramic chip.
1 and 2, a composite electronic component according to a first embodiment of the present invention may include a first ceramic body 110 having a plurality of dielectric layers and internal electrodes disposed to face each other with the dielectric layers interposed therebetween. The multilayer ceramic capacitor 100 including the first and second external electrodes 131 and 132 disposed at both ends of the first ceramic body 110 and the lower portion of the multilayer ceramic capacitor 100, the ceramic First and second terminal electrodes 211 disposed at both ends of the second ceramic body 210 and the second ceramic body 210 and connected to the first and second external electrodes 131 and 132. The ceramic chip 200 including the 212 includes a combined composite 300.
In this embodiment, the composite 300 may be formed by combining the multilayer ceramic capacitor 100 and the ceramic chip 200, and the method of forming the composite 300 is not particularly limited.
For example, as shown in FIG. 2, the composite 300 may be formed by combining the separately manufactured multilayer ceramic capacitor 100 and the ceramic chip 200 with a high melting point solder or a conductive adhesive 213.
The conductive adhesive 213 may be in the form of a paste including a conductive metal and an epoxy resin, but is not necessarily limited thereto.
When the multilayer ceramic capacitor 100 and the ceramic chip 200 are coupled to each other by a high melting point solder or a conductive adhesive 213, the conductive adhesive 213 may include the first external electrode 131 and the second external electrode ( It is applied to the lower surface of the 132 and bonded to the first and second terminal electrodes 211 and 212 of the ceramic chip 200.
The high melting point solder or conductive adhesive 213 is applied to the lower surface of the first external electrode 131 and the second external electrode 132 to be fixed to the ceramic chip 200 on the lower surface of the multilayer ceramic capacitor 100. As a result, only the vibration of the length-width surface (LW surface) of the first ceramic body 110 is transmitted to the ceramic chip 200.
Due to this, acoustic noise can be reduced by minimizing the transfer of stress and vibration generated in the multilayer ceramic capacitor to the ceramic chip.
Referring to FIG. 3, a method of coupling the multilayer ceramic capacitor 100 and the ceramic chip 200 as another embodiment of a composite electronic component, the bottom surface of the first ceramic body 110 of the multilayer ceramic capacitor and the ceramic It may be performed by an insulating adhesive 214 applied between the upper surface of the second ceramic body 210 of the chip 200.
Application of the insulating adhesive 214 between the bottom surface of the first ceramic body 110 and the top surface of the second ceramic body 210 of the ceramic chip 200 means that the bottom surface of the first ceramic body 110 is applied. And it means that the first and second external electrodes and the first and second terminal electrodes on the upper surface of the second ceramic body 210 is applied to the ceramic portion is not disposed.
The insulating adhesive 214 is not particularly limited, but may be, for example, an epoxy resin.
Hereinafter, the multilayer ceramic capacitor 100 and the ceramic chip 200 constituting the composite 300 will be described in detail.
Referring to FIG. 4, the first ceramic body 110 constituting the multilayer ceramic capacitor 100 is formed by stacking a plurality of dielectric layers 111, and a plurality of first ceramic bodies 110 are formed in the first ceramic body 110. The internal electrodes 121 and 122 may sequentially be separated from each other with the dielectric layer interposed therebetween.
The plurality of dielectric layers 111 constituting the first ceramic body 110 are in a sintered state, and the boundaries of adjacent dielectric layers may be integrated to an extent that cannot be confirmed.
The dielectric layer 111 may be formed by firing a ceramic green sheet including ceramic powder, an organic solvent, and an organic binder. The ceramic powder is a material having a high dielectric constant, but is not limited thereto, and may be a barium titanate (BaTiO 3 ) -based material, a strontium titanate (SrTiO 3 ) -based material, or the like.
That is, the dielectric layer 111 constituting the first ceramic body 110 may include a ferroelectric material, but is not necessarily limited thereto.
On the other hand, according to the first embodiment of the present invention, the internal electrode is a first internal electrode 121 exposed to the first longitudinal side of the composite 300 and a second internal electrode exposed to the second longitudinal side And 122, but is not necessarily limited thereto.
The first and second internal electrodes 121 and 122 may be formed by a conductive paste containing a conductive metal.
The first and second internal electrodes 121 and 122 may be printed using a conductive paste on a ceramic green sheet forming the dielectric layer 111 through a printing method such as screen printing or gravure printing.
The ceramic body may be formed by alternately stacking and firing ceramic green sheets printed with internal electrodes.
The plurality of first and second internal electrodes 121 and 122 may be disposed perpendicularly to upper and lower surfaces of the first ceramic body 110.
That is, the first and second internal electrodes 121 and 122 may be stacked vertically with respect to the mounting surface when the composite 300 is mounted on the printed circuit board.
In general, when a voltage is applied to a multilayer ceramic capacitor, an inverse piezoelectric effect of the dielectric layer causes the ceramic body to expand and contract in the length, width, and thickness directions.
That is, when the displacement amount of the length-width surface (LW surface), the width-thickness surface (WT surface) and the length-thickness surface (LT surface) of the ceramic body is measured by a laser doppler vibrometer (LDV), the LW surface> WT surface Displacement amount appears in the order of LT plane.
The displacement of the LT plane relative to the WT plane is about 42%, less than the displacement of the WT plane. It is assumed that the same size stress is generated on the LT and WT planes, but the LT plane has a relatively larger area than the WT plane, so that stresses of similar magnitude are distributed over a large area, so that relatively small deformation occurs. can do.
Through this, it can be seen that the displacement amount in the LT plane is the least in the general multilayer ceramic capacitor.
That is, according to the first embodiment of the present invention, the composite 300 is printed by vertically stacking the first and second internal electrodes 121 and 122 on the top and bottom surfaces of the first ceramic body 110. When the circuit board is mounted on the circuit board, the first and second internal electrodes 121 and 122 may be disposed perpendicular to the mounting surface to minimize the amount of vibration of the surface contacting the ceramic chip 200.
The first and second external electrodes 131 and 132 may be formed of a conductive paste including a conductive metal, and the conductive metal may be nickel (Ni), copper (Cu), palladium (Pd), or gold. (Au) or an alloy thereof, but the present invention is not limited thereto.
In addition, nickel / tin (Ni / Sn) plating layers may be further disposed on the first and second external electrodes 131 and 132.
According to the first embodiment of the present invention, the ceramic chip 200 is coupled to the lower portion of the multilayer ceramic capacitor 100.
The ceramic chip 200 may have first and second terminals connected to the first and second external electrodes 131 and 132 at both ends of the second ceramic body 210 made of a bulk ceramic. The electrodes 211 and 212 have a shape in which the electrodes are disposed.
In general, attempts have been made to insert an intermediate medium between the multilayer ceramic capacitor and the substrate in order to minimize transmission of vibration of the multilayer ceramic capacitor to the printed circuit board.
However, since the intermediate medium is generally a resin used for fabricating a substrate, the intermediate medium is made of a material having elasticity to absorb vibrations of the multilayer ceramic capacitor with elasticity of the intermediate medium.
On the other hand, according to the first embodiment of the present invention, since the second ceramic body 210 of the ceramic chip 200 is made of only a ceramic of hard material without elastic deformation, the printed circuit board and the multilayer ceramic capacitor 100 are Is spaced apart from the ceramic chip 200, thereby preventing transmission of the vibration itself generated from the multilayer ceramic capacitor 100.
The ceramic may comprise a dielectric material.
Since the dielectric material does not have a piezoelectric property, it is possible to suppress transmission of vibration itself generated from the multilayer ceramic capacitor 100, whereby the ceramic chip 200 including the dielectric material has a structure in which the multilayer ceramic capacitor 100 is prevented. It can be disposed under the) to reduce acoustic noise.
The dielectric material is not particularly limited as long as it is a material having a dielectric constant, and for example, (Ca 1 - x Sr x ) (Zr 1 - y Ti y ) O 3 , Ca (Zr 1 - y Ti y ) O 3 may be a - (x Sr x Ca 1) ZrO 3 and a material represented by (Ca 1-x Sr x) TiO 3 -, Sr (Zr 1 y Ti y) O 3,.
In addition, the ceramic may include alumina (Al 2 O 3 ).
By manufacturing the second ceramic body 210 with a ceramic containing alumina (Al 2 O 3 ), similarly to the case of the dielectric material, the transmission of vibration itself generated from the multilayer ceramic capacitor 100 is suppressed. can do.
The first and second terminal electrodes 211 and 212 may have a double layer structure of the first and second conductive resin layers on the inner side and the first and second plating layers on the outer side.
According to the first embodiment of the present invention, as described above, the first and second terminal electrodes 211 and 212 have a double layer structure of the first and second conductive resin layers on the inner side and the first and second plating layers on the outer side. Therefore, when mechanical stress is applied from the outside, the stress transfer to the multilayer ceramic capacitor 100 is suppressed by the conductive resin layer used as the ceramic electrodes 200 and the terminal electrodes 211 and 212 of the ceramic chip 200. The damage caused by the crack of the multilayer ceramic capacitor can be prevented.
The first and second conductive resin layers may include a conductive metal and a thermosetting resin, but are not limited thereto, and may include, for example, silver (Ag) and an epoxy resin.
Referring to FIG. 5, the ceramic chip 200 included in the composite electronic component of the present invention first prepares a second ceramic body 210 made of a bulk ceramic (FIG. 5A).
The ceramic may comprise a dielectric material, or may comprise alumina (Al 2 O 3 ).
Next, conductive resin pastes are applied to both ends of the second ceramic body 210 to form first and second conductive resin layers 221 and 222 (FIG. 5B). The conductive resin paste may include a conductive metal and a thermosetting resin.
The conductive resin paste may contain, for example, silver (Ag) as the conductive metal and epoxy resin as the thermosetting resin.
Next, nickel plating and tin plating are performed on the first and second conductive resin layers 221 and 222 to form first and second plating layers 211 and 212 (FIG. 5C).
According to the first embodiment of the present invention, the longitudinal lengths of the multilayer ceramic capacitor 100 and the ceramic chip 200 are different from each other.
As described above, the longitudinal lengths of the multilayer ceramic capacitor 100 and the ceramic chip 200 are different from each other, and in particular, the length of the ceramic chip 200 is longer than that of the multilayer ceramic capacitor 100, thereby making it possible to produce composite electrons. Even when the component is mounted on the printed circuit board, the solder is prevented from rising up the first and second external electrodes 131 and 132 of the multilayer ceramic capacitor 100 even though the amount of solder is large. Since the piezoelectric stress is directly prevented from being transmitted to the circuit board through the first and second external electrodes 131 and 132, an effect of reducing acoustic noise may be improved.
That is, when the length of the ceramic chip 200 is made longer than the length of the multilayer ceramic capacitor 100, a step is formed between the ceramic chip 200 and the multilayer ceramic capacitor 100, the step is the The solder formed in the thickness direction of the ceramic chip 200 may serve to block the connection to the multilayer ceramic capacitor 100.
Because of this, vibration transmission to the substrate by the solder can be minimized.
Referring to FIG. 6, in the composite electronic component according to the second embodiment of the present invention, the length of the ceramic chip 200 ′ is longer than the length of the multilayer ceramic capacitor 100 and the ceramic chip 200 ′. The width of is greater than the width of the multilayer ceramic capacitor 100.
The ceramic chip 200 ′ is disposed at both ends of the second ceramic body 210 ′ made of ceramic and the second ceramic body 210 ′, and includes the first and second external electrodes 131 and 132. And connected first and second terminal electrodes 211 ', 212'.
Since the length of the ceramic chip 200 'is longer than the length of the multilayer ceramic capacitor 100 and the width of the ceramic chip 200' is larger than the width of the multilayer ceramic capacitor 100, When mounted on a printed circuit board, it may serve to block solder from being connected to the multilayer ceramic capacitor 100 in the length and width directions of the multilayer ceramic capacitor 100.
For this reason, the effect of reducing vibration transmission to the substrate by the solder may be better.
Referring to FIG. 7, in the composite electronic component according to the third exemplary embodiment of the present invention, the length of the ceramic chip 200 ″ is shorter than the length of the multilayer ceramic capacitor 100 and the ceramic chip 200 ′. ') Is greater than the width of the multilayer ceramic capacitor 100.
The ceramic chip 200 ″ is disposed at both ends of the second ceramic body 210 ″ and the second ceramic body 210 ″ made of ceramic, and the first and second external electrodes 131, 132 and first and second terminal electrodes 211 &quot; and 212 &quot;
Since the length of the ceramic chip 200 ″ is shorter than the length of the multilayer ceramic capacitor 100 and the width of the ceramic chip 200 ″ is larger than the width of the multilayer ceramic capacitor 100, the composite electrons When the component is mounted on the printed circuit board, solder is applied only to the bottom surface of the first and second external electrodes 131 and 132 in the longitudinal direction of the multilayer ceramic capacitor 100, and the multilayer ceramic capacitor ( It can block the connection to 100).
Referring to FIG. 8, in the composite electronic component according to the fourth embodiment of the present invention, the length of the ceramic chip 200 ′ ″ is shorter than the length of the multilayer ceramic capacitor 100 and the ceramic chip 200. ''') Is smaller than the width of the multilayer ceramic capacitor 100.
The ceramic chip 200 '''is disposed at both ends of the second ceramic body 210''' made of ceramic and the second ceramic body 210 ''', and the first and second external electrodes First and second terminal electrodes 211 ′ ″ and 212 ″ ″ connected to 131 and 132.
Since the length of the ceramic chip 200 '''is shorter than the length of the multilayer ceramic capacitor 100, and the width of the ceramic chip 200''' is smaller than the width of the multilayer ceramic capacitor 100, When the composite electronic component is mounted on a printed circuit board, solder is applied only to the lower surfaces of the first and second external electrodes 131 and 132 in the length direction and the width direction of the multilayer ceramic capacitor 100, and the multilayer ceramic capacitor 100. It can serve to block the connection to the thickness direction of).
Boards for Composite Electronic Components
9 and 10, the mounting board 400 of the composite electronic component according to the present embodiment includes two printed circuit boards 410 on which the composite electronic components are mounted and two upper surfaces of the printed circuit board 410. Electrode pads 421 and 422.
The electrode pads 421 and 422 are first and second electrode pads 421 and 422 respectively connected to the first and second terminal electrodes 211 and 212 of the ceramic chip 200 of the composite electronic component. Can be done.
In this case, the first and second terminal electrodes 211 and 212 of the ceramic chip 200 are respectively disposed on the first and second electrode pads 421 and 422 in contact with each other by the solder 430. 410 may be electrically connected.
Acoustic noise may occur when a voltage is applied while the composite electronic component is mounted on the printed circuit board 610 as described above.
That is, in the state in which the composite electronic component is mounted on the printed circuit board 410, the first external electrode 131 and the second external electrode 132 disposed on both side surfaces of the multilayer ceramic capacitor 100 in the longitudinal direction of the composite electronic component 132. When a voltage having a different polarity is applied thereto, the ceramic body expands and contracts in the thickness direction due to an inverse piezoelectric effect of the dielectric layer 111, and the first external electrode 131 and the second external electrode are contracted. Both side portions of 132 contract and expand as opposed to expansion and contraction in the thickness direction of the first ceramic body by the Poisson effect.
Here, in the composite electronic component according to an embodiment of the present invention, the lengths of the multilayer ceramic capacitor and the ceramic chip are different from each other, and in particular, the length of the ceramic chip 200 is longer than the length of the multilayer ceramic capacitor 100. By fabricating the composite electronic component, the solder is prevented from rising up the first and second external electrodes 131 and 132 of the multilayer ceramic capacitor 100 even when a large amount of solder is mounted on the printed circuit board. Since the piezoelectric stress is directly prevented from being transmitted to the circuit board through the first and second external electrodes 131 and 132 at 100, the effect of reducing acoustic noise may be improved.
That is, when the composite electronic component is mounted on a substrate, acoustic noise may be reduced by reducing transmission of the vibration of the capacitor due to the reverse piezoelectricity of the capacitor to the substrate.
11 to 13 are perspective views illustrating a state in which the composite electronic component according to the second to fourth embodiments of the present invention of FIGS. 6 to 8 is mounted on a printed circuit board, and according to the first embodiment of the present invention described above. The description is the same as the description of the composite electronic component and the mounting board thereof, and detailed description thereof will be omitted here to avoid duplication.
Composite electronic components Package
Referring to FIG. 15, the package 700 of the composite electronic component according to the present exemplary embodiment may include a packaging sheet 720 in which an accommodating part 724 for accommodating the composite electronic component is formed.
The accommodating part 724 of the packing sheet 720 may have a shape corresponding to that of the composite electronic component, and the internal electrode may be vertically disposed based on the bottom 725 of the accommodating part 724.
In particular, each of the composite electronic components accommodated in the accommodating part 724 may be disposed such that the ceramic chip 200 faces the bottom surface of the accommodating part 724.
The composite electronic component maintains the internal electrodes vertically aligned through the electronic component aligning apparatus, and moves to the packaging sheet 720 through the conveying apparatus.
Therefore, each of the composite electronic components accommodated in the accommodating part 724 may be disposed such that the ceramic chip 200 faces the bottom surface of the accommodating part 724.
In this manner, a plurality of composite electronic components in the packaging sheet 720 may be arranged to have the same orientation in the packaging sheet 720.
In the package 700 of the composite electronic component, the internal electrodes are vertically disposed with respect to the bottom 725 of the accommodating part 724, and the ceramic chip 200 forms the bottom of the accommodating part 724. The package layer 740 may further include a packaging film 740 covering the packaging sheet 720 in which the composite electronic component disposed to face the packaging sheet 720 is accommodated.
FIG. 16 is a package 700 of a composite electronic component having a shape wound in a reel type, and may be continuously wound and formed.
Referring to Figure 16, it can be seen that the result of comparing the acoustic noise (acoustic noise) according to the embodiment of the present invention and the comparative example.
In FIG. 16, Comparative Example 1 corresponds to a general multilayer ceramic capacitor, and in Comparative Example 2, a composite electronic capacitor having a multilayer ceramic capacitor and a ceramic chip made of a dielectric material below the multilayer ceramic capacitor is disposed as in the exemplary embodiment of the present invention. The internal electrode of the component or the multilayer ceramic capacitor is arranged horizontally on the mounting surface. In the comparative example 3, the thickness of the lower cover layer of the ceramic body is thicker than the thickness of the upper cover layer in the multilayer ceramic capacitor. .
In the first embodiment, the multilayer ceramic capacitor and a ceramic chip made of a dielectric material are disposed below the multilayer ceramic capacitor.
Referring to FIG. 16, the first embodiment of the present invention, which is a composite electronic component in which a multilayer ceramic capacitor and a ceramic chip made of a dielectric material is disposed below, has acoustic noise as compared to Comparative Examples 1 to 3. FIG. It can be seen that the value is very low.
In FIG. 17, Comparative Example 1 corresponds to a general multilayer ceramic capacitor. In Comparative Example 2, in the multilayer ceramic capacitor, the thickness of the lower cover layer of the ceramic body is thicker than the thickness of the upper cover layer.
In the case of Example 1, the multilayer ceramic capacitor and a ceramic chip made of a dielectric material are disposed below the multilayer ceramic capacitor, and in Examples 2 to 5, alumina (Al 2 O 3 ) is included. This is the case where the ceramic chip made of ceramic is a composite electronic component disposed under the multilayer ceramic capacitor.
Examples 2 to 5 are cases where the thickness of the ceramic chip is 0.1 mm, 0.2 mm, 0.3 mm and 0.4 mm, respectively.
Referring to FIG. 17, it can be seen that the acoustic noise reduction effect is most excellent in the first embodiment of the present invention, which is a composite electronic component in which a multilayer ceramic capacitor and a ceramic chip made of a dielectric material are disposed below. Can be.
In addition, in the case of Examples 2 to 5, wherein the ceramic chip made of a ceramic containing alumina (Al 2 O 3 ) is a composite electronic component disposed under the multilayer ceramic capacitor, the acoustic chip is compared to Comparative Examples 1 and 2. It can be seen that the noise reduction effect is excellent.
100; Multilayer Ceramic Capacitors
200, 200 ', 200'',200'''; Ceramic chip
110; First ceramic body 210; Second ceramic body
300; Complex 111; Dielectric layer
121, 122; First and second internal electrodes
131, 132; First and second external electrodes
211, 212; First and second terminal electrodes
213; Conductive adhesive 214; Insulating adhesive
400; A mounting substrate 410; Printed circuit board
421, 422; First and second electrode pads
430; Solder
A multilayer ceramic capacitor including a first ceramic body having a plurality of dielectric layers and internal electrodes disposed to face each other with the dielectric layer interposed therebetween, and first and second external electrodes disposed at both ends of the first ceramic body; And
A second ceramic body disposed under the multilayer ceramic capacitor and disposed at both ends of the second ceramic body and the first and second terminal electrodes connected to the first and second external electrodes, respectively; A ceramic chip; comprising a combined composite,
The lengths of the multilayer ceramic capacitor and the ceramic chip are different from each other, and the first and second terminal electrodes included in the ceramic chip cover the entire length of both end surfaces of the second ceramic body in the longitudinal direction, and are disposed to extend on the top and bottom sides. The ceramic included in the first ceramic body of the multilayer ceramic capacitor and the ceramic included in the second ceramic body of the ceramic chip are different from each other, and the ceramic included in the first ceramic body includes a ferroelectric material. Ceramic is a composite electronic component containing a dielectric material having a lower piezoelectric property than the ferroelectric.
The internal electrode is stacked vertically with respect to the mounting surface of the composite.
The multilayer ceramic capacitor and the ceramic chip are bonded by a conductive adhesive applied to the lower surface of the first external electrode and the second external electrode.
The multilayer ceramic capacitor and the ceramic chip are bonded by an insulating adhesive applied between the lower surface of the first ceramic body and the upper surface of the second ceramic body.
The first and second terminal electrodes have a double layer structure of the first and second conductive resin layers on the inner side and the first and second plating layers on the outer side.
The first and second conductive resin layer is a composite electronic component containing silver (Ag) and epoxy resin.
The length of the ceramic chip is longer than the length of the multilayer ceramic capacitor composite electronic component.
The width of the ceramic chip is greater than the width of the multilayer ceramic capacitor composite component.
The length of the ceramic chip is shorter than the length of the multilayer ceramic capacitor.
The length of the ceramic chip is shorter than the length of the multilayer ceramic capacitor, the width of the ceramic chip is smaller than the width of the multilayer ceramic capacitor.
A printed circuit board having a plurality of electrode pads thereon;
A composite electronic component installed on the printed circuit board; And
And solder to connect the electrode pad and the composite electronic component.
The composite electronic component includes a first ceramic body having a plurality of dielectric layers and internal electrodes disposed to face each other with the dielectric layers interposed therebetween, and first and second external electrodes disposed at both ends of the first ceramic body. First and second electrodes disposed at both ends of the multilayer ceramic capacitor and the multilayer ceramic capacitor and disposed at both ends of the second ceramic body made of ceramic and the second ceramic body, and connected to the first and second external electrodes. And a ceramic chip including a terminal electrode, wherein the ceramic chip includes a composite, wherein the lengths of the multilayer ceramic capacitor and the ceramic chip are different from each other, and the first and second terminal electrodes included in the ceramic chip are formed of a second ceramic body. The first ceramic body of the multilayer ceramic capacitor is disposed to cover the entire longitudinal cross section and extends to the upper and lower surfaces and to both side surfaces. The ceramics included and the ceramics included in the second ceramic body of the ceramic chip are different from each other, and the ceramic included in the first ceramic body includes a ferroelectric, and the ceramic of the ceramic chip has a lower dielectric property than the ferroelectric. The mounting board of the composite electronic component comprising a.
The solder is a mounting board of the composite electronic component is applied to the side of the first and second terminal electrodes and the lower portion of the first and second external electrodes.
The internal electrode is a mounting board of the composite electronic component stacked vertically with respect to the mounting surface of the composite.
The composite electronic component of claim 1; And
And a packing sheet in which an accommodating part for accommodating the composite electronic component is formed.
The package of the composite electronic component, the inner electrode is vertically arranged and aligned with respect to the bottom surface of the housing.
Each of the composite electronic components accommodated in the accommodating portion is a package of a composite electronic component disposed such that the ceramic chip faces a bottom surface of the accommodating portion.
The package of the composite electronic component further comprising; a packaging film coupled to the packaging sheet and covering the composite electronic component.
The packaging sheet containing the composite electronic component is a package of a composite electronic component is formed by winding in a reel type.
KR1020140155179A 2014-11-10 2014-11-10 Composite electronic component, board for mounting the same and packing unit thereof KR102070233B1 (en)
KR1020140155179A KR102070233B1 (en) 2014-11-10 2014-11-10 Composite electronic component, board for mounting the same and packing unit thereof
US14/869,935 US10229790B2 (en) 2014-11-10 2015-09-29 Composite electronic component and board having the same
KR20160055424A KR20160055424A (en) 2016-05-18
KR102070233B1 true KR102070233B1 (en) 2020-01-28
ID=55912775
US (1) US10229790B2 (en)
KR (1) KR102070233B1 (en)
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2014-11-10 KR KR1020140155179A patent/KR102070233B1/en active IP Right Grant
2015-09-29 US US14/869,935 patent/US10229790B2/en active Active
US20160133386A1 (en) 2016-05-12
KR20160055424A (en) 2016-05-18
US10229790B2 (en) 2019-03-12
JP2016208003A (en) 2016-12-08 Capacitor component
2018-05-02 A302 Request for accelerated examination
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2019-02-25 AMND Amendment
2019-08-26 X091 Application refused [patent]
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