JP2016178337A - Electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost and highly productive electronic component that can be closely and densely packaged.SOLUTION: An electronic component 1 includes: an element body 2; external electrodes 3, 4; and an insulating resin coating layer 21. The element body 2 has: a pair of end surfaces 2a, 2b facing each other; a pair of main surfaces 2c, 2d facing each other; and a pair of side surfaces 2e, 2f facing each other. The external electrodes 3, 4 are formed so as to cover at least parts of the main surfaces 2c, 2d and parts of the side surfaces 2e, 2f. The insulating resin coating layer 21 covers portions that are formed so as to cover the side surfaces 2e, 2f in the external electrodes 3, 4, and is integrally formed so as to surround the pair of the end surfaces 2a, 2b and the pair of the side surfaces 2e, 2f. The portion that is formed so as to cover the main surface 2c in the external electrodes 3, 4 and regions not covered with the external electrodes 3, 4 in the main surface 2c are not covered with the insulating resin coating layer 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic component.

  As a surface mount component (for example, a multilayer ceramic capacitor), a pair of end faces facing each other, a pair of main faces extending to connect between the pair of end faces and facing each other, and a pair of main faces are connected An external body having a pair of side surfaces extending and facing each other, an external electrode formed so as to cover a part of the main surface and / or a part of the side surface, and having a plating layer made of Sn or an Sn alloy; (For example, refer to Patent Document 1). In the electronic component described in Patent Document 1, the external electrode has a five-sided electrode structure formed so as to straddle both end faces of the element body, part of the main surface adjacent to the end face, and part of the side face.

  For this reason, as shown in FIGS. 10 to 13, when the electronic component 101 is solder-mounted on the substrate SS having the wiring pattern WP, solder is also applied to the external electrode 103 formed on the side surface of the electronic component 101. Wrap around. The solder fillet SF is also formed on the electrode side surface portion of the external electrode 103. For this reason, when a plurality of electronic components 101 are arranged in parallel or in series and mounted, solder bridges are formed between the end faces and side portions of the adjacent electronic components 101, and a problem that the electronic components 101 are short-circuited easily occurs. This is a problem in narrow adjacent high-density mounting in which the interval between the electronic components 101 is reduced. As shown in FIG. 14, when both side portions of the adjacent electronic component 101 come into contact with each other due to a positional deviation at the time of mounting, or as shown in FIG. 15, the end surface portion of one electronic component 101 and the other electronic component In the case of contact with the side surface portion of 101, there is a possibility that an inter-electrode short circuit between the two electronic components 101 occurs.

  In order to solve such a problem, an electronic component in which an electrode is formed only on the bottom surface of the electronic component has been proposed (see, for example, Patent Document 2). In the electronic component described in Patent Document 2, a solder fillet at the time of mounting is not formed, or the formed solder fillet is small.

JP 2006-013315 A JP 2001-267176 A

  However, the electronic component described in Patent Document 2 has the following problems.

  The internal structure of the electronic component needs to be significantly changed from that of the conventional electronic component, and in particular, the formation of the external electrode cannot be performed by equipment used in the conventional electronic component. It is necessary to form the external electrode after aligning the surface where the internal conductor arranged in the electronic component is exposed by some method. For these reasons, the cost increases greatly.

  The area of the external electrode is significantly smaller than that of the external electrode having the conventional five-face electrode structure. For this reason, when the plating layer which an external electrode has is formed, since the productivity is low and the productivity is good, the probability of energization through the media (metal sphere) to the plating cathode is low when the barrel plating method that is normally used is used. . As a result, the plating time takes a long time, for example, five times or more, and the productivity is lowered. In addition, it is known that plating, particularly in the case of a multilayer ceramic capacitor, significantly deteriorates the reliability of the multilayer ceramic capacitor when a plating solution enters the element body. For this reason, there is a large risk that reliability is lowered due to long-time plating.

  The electrical property inspection of a product is performed by bringing a contact probe of a measuring machine into contact with an external electrode of an electronic component. For this reason, since the external electrode is formed only on one limited surface of the electronic component, it is necessary to contact the contact probe after aligning the electronic component on the contact probe side of the measuring instrument, and a new inspection device is necessary. In addition, it takes time to confirm the direction of the product, align it, and position it with high precision in order to make the electrical characteristics by bringing the contact probe into precise contact with the minute electrodes after aligning the miniaturized products. It is difficult to inspect well.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electronic component that is low in cost and excellent in productivity and that enables narrow adjacent high-density mounting.

  An electronic component according to the present invention extends so as to connect a pair of end surfaces, a pair of main surfaces that face each other, and a pair of main surfaces that extend between each other and face each other. An element having a pair of side surfaces, an external electrode formed so as to cover at least a part of the main surface and / or a part of the side surface, and having a plating layer made of Sn or Sn alloy, and a side surface of the external electrode An insulating resin coating layer covering at least a portion formed so as to cover.

  An electronic component according to the present invention extends so as to connect a pair of end surfaces, a pair of main surfaces that face each other, and a pair of main surfaces that extend between each other and face each other. An element body having a pair of side surfaces, formed so as to cover at least a part of the main surface and an end surface, and formed so as to cover an external electrode having a plating layer made of Sn or an Sn alloy, and an end surface of the external electrode. An insulating resin coating layer covering at least the formed portion.

  ADVANTAGE OF THE INVENTION According to this invention, while being low-cost and excellent in productivity, the electronic component which enables the narrow adjacent high-density mounting can be provided.

It is a perspective view which shows the electronic component which concerns on this embodiment. It is a figure for demonstrating the cross-sectional structure of the electronic component which concerns on this embodiment. It is a figure for demonstrating the cross-sectional structure of the electronic component which concerns on this embodiment. It is a perspective view which shows one example of mounting of the electronic component which concerns on this embodiment. It is a top view which shows one example of mounting of the electronic component which concerns on this embodiment. It is a figure for demonstrating the cross-sectional structure along the VI-VI line in FIG. It is a figure for demonstrating the cross-sectional structure along the VII-VII line in FIG. It is a top view which shows one example of mounting of the electronic component which concerns on this embodiment. It is a top view which shows one example of mounting of the electronic component which concerns on this embodiment. It is a perspective view which shows one example of mounting of the conventional electronic component. It is a top view which shows one example of mounting of the conventional electronic component. It is a figure for demonstrating the cross-sectional structure along the XII-XII line | wire in FIG. It is a figure for demonstrating the cross-sectional structure along the XIII-XIII line | wire in FIG. It is a top view which shows one example of mounting of the conventional electronic component. It is a top view which shows one example of mounting of the conventional electronic component.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  With reference to FIGS. 1-3, the structure of the electronic component 1 which concerns on this embodiment is demonstrated. FIG. 1 is a perspective view showing an electronic component according to this embodiment. 2 and 3 are views for explaining a cross-sectional configuration of the electronic component according to the present embodiment. In FIG. 3, illustration of internal electrodes 7 and 8 to be described later is omitted.

  The electronic component 1 is an electronic component such as a multilayer ceramic capacitor, and includes an element body 2 and a plurality of external electrodes 3 and 4. The element body 2 is formed in a substantially rectangular parallelepiped shape by laminating and integrating a plurality of ceramic green sheets. As shown in FIG. 1, the element body 2 has a pair of end surfaces 2a and 2b, a pair of main surfaces 2c and 2d, and a pair of side surfaces 2e and 2f. The pair of end faces 2 a and 2 b are opposed to the longitudinal direction of the element body 2. The pair of main surfaces 2c and 2d extend so as to connect the pair of end surfaces 2a and 2b and face each other. The pair of side surfaces 2e and 2f extend so as to connect the pair of main surfaces 2c and 2d and face each other.

  The electronic component 1 has, for example, a vertical length set to about 0.4 mm to 1.6 mm, a horizontal length set to about 0.2 mm to 0.8 mm, and a thickness of 0.4 mm to 0 mm. It is set to about 8mm.

  As shown in FIG. 2, the element body 2 is configured as a stacked body in which a plurality of rectangular dielectric layers 6 and a plurality of internal electrodes 7 and internal electrodes 8 are stacked. The internal electrodes 7 and the internal electrodes 8 are arranged one by one in the element body 2 along the stacking direction of the dielectric layers 6 (hereinafter simply referred to as “stacking direction”). The internal electrode 7 and the internal electrode 8 are disposed so as to face each other with at least one dielectric layer 6 interposed therebetween.

Each dielectric layer 6 is a sintered body of a ceramic green sheet containing, for example, a dielectric ceramic (dielectric ceramic such as BaTiO ₃ series, Ba (Ti, Zr) O ₃ series, or (Ba, Ca) TiO ₃ series). Consists of The actual element body 2 is integrated so that the boundary between the dielectric layers 6 is not visible.

  The internal electrodes 7 and 8 include a conductive material such as Ni or Cu. The thickness of the internal electrodes 7 and 8 is, for example, about 0.5 μm to 3 μm. The shape of the internal electrodes 7 and 8 is not particularly limited as long as the internal electrodes 7 and 8 have shapes that overlap with each other when viewed from the stacking direction. The internal electrodes 7 and 8 have a rectangular shape, for example. The internal electrodes 7 and 8 are configured as a sintered body of a conductive paste containing the conductive material. The internal electrode 7 is electrically and physically connected to the external electrode 3, and the internal electrode 8 is electrically and physically connected to the external electrode 4.

  The external electrode 3 is formed on the end face 2 a side of the element body 2. The external electrode 3 is formed so as to cover one end surface 2a and part of each edge of the two main surfaces 2c, 2d and the two side surfaces 2e, 2f orthogonal to the end surface 2a. That is, the external electrode 3 is located on the electrode part 3a located on the end surface 2a, the electrode parts 3c, 3d located on a part of each main surface 2c, 2d, and a part of each side surface 2e, 2f. And electrode portions 3e and 3f. The external electrode 3 has a five-sided electrode structure.

  The external electrode 4 is formed on the end face 2 b side of the element body 2. The external electrode 4 is formed so as to cover the other end surface 2b and part of each edge of the two main surfaces 2c, 2d and the two side surfaces 2e, 2f orthogonal to the end surface 2b. That is, the external electrode 4 is located on the electrode portion 4b located on the end surface 2b, the electrode portions 4c and 4d located on a portion of each of the main surfaces 2c and 2d, and the portions of the side surfaces 2e and 2f. Electrode portions 4e and 4f. The external electrode 4 has a five-sided electrode structure.

  The external electrodes 3 and 4 are heated to a predetermined temperature (for example, about 700 ° C.) after a conductive paste mainly composed of Cu, Ni, Ag, Pd or the like is attached to the outer surface of the element body 2 by a method described later. It is formed by baking and electroplating. The external electrodes 3 and 4 have a plating layer formed by electroplating.

  In this embodiment, the external electrodes 3 and 4 have at least a plating layer made of Sn or Sn alloy in order to improve electrode wettability with solder. The plating layer made of Sn or Sn alloy constitutes the surface layer of the external electrodes 3 and 4.

  The external electrodes 3 and 4 may have a plating layer made of Ni or Ni alloy in order to prevent the reaction between the solder and the baking electrode layer. In this case, the plating layer made of Sn or Sn alloy is formed after the plating layer made of Ni or Ni alloy is formed. The thickness of the plating layer made of Ni or Ni alloy is about 0.5 to 6 μm, and the thickness of the plating layer made of Sn or Sn alloy is about 1 to 7 μm. Moreover, when the baking electrode layer is formed by baking Ni paste, the plating layer made of Ni or Ni alloy may be omitted.

  The external electrodes 3 and 4 may have a plating layer made of Cu. In this case, the plating layer made of Ni or Ni alloy is formed after the plating layer made of Cu is formed.

  In the present embodiment, the external electrodes 3 and 4 have baked electrode layers 31 and 41, Ni plating layers 33 and 43, and Sn plating layers 35 and 45, as shown in FIG.

  The electronic component 1 includes an insulating resin coating layer 21. As shown in FIGS. 1 and 3, the insulating resin coating layer 21 is formed on the electrode portions 3e, 3f, 4e, 4f and the end surfaces 2a, 2b located on the side surfaces 2e, 2f of the element body 2. It is formed so as to cover the positioned electrode portions 3a and 4b. The insulating resin coating layer 21 can be formed by applying an insulating resin coating agent and solidifying it. A screen printing method or the like can be used for applying the insulating resin coating agent.

  The insulating resin coating layer 21 obtained by solidifying the insulating resin coating agent preferably has a film thickness after solidification set in a range of 2 μm to 30 μm.

  When soldering the electronic component 1 as a product, the plating layer made of Sn or Sn alloy, which is the base of the insulating resin coating layer 21, is melted. When the insulating resin coating layer 21 is too thin, if the plating layer made of Sn or Sn alloy is melted, the mechanical strength in the planar direction of the insulating resin coating layer 21 is insufficient, and cracking or peeling is not preferable. . In particular, when the thickness of the insulating resin coating layer 21 is less than 2 μm, a region where the insulating resin coating layer 21 is not formed may occur, which is not preferable.

  If the insulating resin coating layer 21 is too thick, the stress due to volume shrinkage when the insulating resin coating layer 21 is solidified becomes excessive, and the insulating resin coating layer 21 may peel off during mounting. When the insulating resin coating layer 21 is thicker than 30 μm, it takes time to solidify and dry, and further, the insulating resin coating layer 21 is defective during solidification due to the stress caused by volume shrinkage when the insulating resin coating layer 21 is solidified. There is a drought that occurs. Furthermore, the external dimension of the electronic component 1 becomes excessive, which is not preferable.

  As the insulating resin coating agent, a thermosetting insulating resin coating agent can be used. For example, thermosetting epoxy resin paints using metal oxide pigments used as solder resists on printed circuit boards, silicone resin paints using metal oxide pigments used as heat resistant paints, fluororesin paints, phenol resins Paint, urea resin paint, melamine resin paint, amino resin paint, unsaturated polyester resin paint, diallyl phthalate resin paint, polyurethane resin paint, polyimide resin paint, alkyd resin paint, spirane resin paint A heat-resistant resin paint such as a thermosetting acrylic resin-based paint, a thermosetting methacrylic resin-based paint, or a thermosetting copolymer resin-based paint can be used. Resist materials used as photoresists such as acrylated epoxy resin and acrylated synthetic rubber also have thermosetting properties and can be used as insulating resin coating agents.

  It is preferable to impart coloring or opacity to the insulating resin coating layer 21 by appropriately adding an organic or inorganic pigment to these insulating resin paints. Examples of the coloring organic pigment include polycyclic pigment phthalocyanine pigments, anthraquinone pigments, azo compound diazo pigments, and inorganic pigments such as metal oxide and carbon black. Further, by using a pigment having a large refractive index as the above-described metal oxide pigment, the insulating resin coating layer 21 may be imparted with appropriate light scattering properties and may be provided with substantial opacity.

  As the insulating resin coating agent, an ultraviolet curable insulating resin coating agent may be used instead of the thermosetting insulating resin coating agent. For example, acrylated epoxy resin paints using metal oxide pigments used as solder resists on printed circuit boards, acrylated silicone resin paints using metal oxide pigments used as heat resistant paints, acrylated fluororesin paints , Acrylated phenolic resin paint, acrylated polyurethane resin paint, acrylated oil paint, acrylated alkyd resin paint, acrylated polyester paint, acrylated polyether paint, acrylated spirane resin paint, acrylated There are copolymer resin-based paints and the like, and the above-mentioned ones can also be used that having been methacrylated. In addition, unsaturated polyester resin-based paints using metal oxide pigments used as heat-resistant paints, polyene and polythiol-based paints can be used.

  It is preferable to impart colorability or opacity to the insulating resin coating layer 21 by appropriately adding an organic or inorganic pigment to these heat resistant resin coatings. Examples of the coloring organic pigment include polycyclic pigment phthalocyanine pigments, anthraquinone pigments, azo compound diazo pigments, and inorganic pigments such as metal oxide and carbon black. Further, by using a pigment having a large refractive index as the above-described metal oxide pigment, the insulating resin coating layer 21 may be imparted with appropriate light scattering properties and may be provided with substantial opacity.

  As the insulating resin coating agent, a thermosetting insulating resin coating agent introduced into an ultraviolet curable insulating resin coating agent may be used. For example, Lewis acid salts and epoxy resin-based paints using metal oxide pigments used as heat-resistant paints, acid generators and acid-cured amino alkyd resin-based paints, and various resins such as the above-mentioned thermosetting insulating resin coating agents are treated with ultraviolet rays. What was introduce | transduced into various curable insulating resin coating agents can be used. An acrylated epoxy resin photoresist or an acrylated synthetic rubber photoresist can also be used.

  In the process of packing the electronic component 1 in the packing material (packing process), the electronic component 1 is packed in the same direction. The electronic component 1 is packed, for example, with the main surface 2c facing the opening side of the packing material. When the insulating resin coating layer 21 is colored or opaque, the main surfaces 2c and 2d where the insulating resin coating layer 21 is not formed and the side surface 2e where the insulating resin coating layer 21 is formed. 2f can be easily determined. For this determination, for example, a spectral color difference meter can be used. The lightness L of the L * a * b * color system (JIS Z8729) is measured with a spectral color difference meter.

  Subsequently, an example of mounting the electronic component 1 will be described with reference to FIGS. FIG. 4 is a perspective view showing an example of mounting the electronic component according to the present embodiment. 5, FIG. 8, and FIG. 9 are plan views showing one mounting example of the electronic component according to the present embodiment. FIG. 6 is a diagram for explaining a cross-sectional configuration along the line VI-VI in FIG. 5. FIG. 7 is a diagram for explaining a cross-sectional configuration along the line VII-VII in FIG. 5. 6 and 7, only the solder fillet SF, which will be described later, is hatched.

  The electronic component 1 is taken out from the packaging material and mounted on the substrate. When taking out the packaged electronic component 1 from the packing material, it is taken out using the suction head of the surface mount mounter. At this time, in the packing process, since the main surface 2c is packed in a shape facing the opening side of the packing material, the suction nozzle comes into contact with the main surface 2c. Thereby, the main surface 2d facing the main surface 2c becomes the mounting surface side of the mounting substrate.

  When mounting, the external electrodes 3 and 4 of the electronic component 1 are electrically connected to the wiring pattern WP of the substrate SS by solder reflow. Therefore, as shown in FIGS. 4 to 7, the electronic component 1 is solder-mounted. As the solder, one based on JIS Z 3282 such as Sn—Sb is used, and none of the solder is wetted by the insulating resin described above.

  Since the solder does not get wet except for the metal, the insulating resin coating layer 21 functions as a solder resist layer. For this reason, if the main surface 2d is the board surface side and the electronic component 1 is mounted on the mounting substrate, the electrode portions 3a, 3e, 3f, 4b, 4e, and 4f of the electronic component 1 are not wetted by the solder. The fillet SF is not formed, and narrow adjacent high-density mounting is possible.

  Therefore, even if the electronic component 1 is mounted adjacent to a narrow space, the solder fillet SF does not exist on the side surfaces 2e and 2f and the end surfaces 2a and 2b as shown in FIGS. There is no short circuit due to the bridge.

  Further, as shown in FIGS. 8 and 9, even if the position deviation at the time of mounting causes the side surface 2e, 2f side portion or the end surface 2a, 2b side portion of the adjacent electronic component 1 to contact each other, the insulating resin Since the coating layer 21 exists, no short circuit between the electrodes occurs between the two electronic components 1.

  When the insulating resin coating layer 21 covers at least the electrode portions 3e, 3f, 4e, and 4f, the electrode portions of the adjacent electronic components 1 are mounted when the plurality of electronic components 1 are mounted in the parallel direction. 3e, 3f, 4e, 4f can be prevented from being short-circuited. Further, when the insulating resin coating layer 21 covers at least the electrode portions 3a and 4b, when the plurality of electronic components 1 are mounted so as to be aligned in the series direction, the electrode portions 3a and 3a of the adjacent electronic components 1 are mounted. 4b can be prevented from being short-circuited. When the insulating resin coating layer 21 covers the electrode portions 3a, 3e, 3f, 4b, 4e, and 4f, the electrodes of the adjacent electronic components 1 regardless of the arrangement when the plurality of electronic components 1 are mounted. It is possible to prevent the portions 3a, 3e, 3f, 4b, 4e, and 4f from being short-circuited.

  The electronic component 1 according to the present embodiment can use the same manufacturing process as the electronic component having a normal five-plane electrode structure. For this reason, the new manufacturing apparatus for manufacturing the electronic component 1 is unnecessary, and capital investment is not required, and the electronic component 1 can be manufactured at low cost.

  In the case of conventional electronic parts with external electrodes only on the bottom surface, the position of the external electrodes is limited to the bottom surface during electrical property inspection and screening after product completion. It is necessary to contact the contact probe after aligning. For this reason, a new inspection device is required. In particular, after aligning miniaturized products such as 0603 shape products with outer dimensions of 0.6 mm x 0.3 mm x 0.3 mm and 0402 shape products with 0.4 mm x 0.2 mm x 0.2 mm, In order to obtain electrical characteristics by bringing a contact probe into contact with the electrode portion with high accuracy, it takes time to confirm the direction of the product, alignment, and high-precision positioning, and it is difficult to inspect with high productivity.

  On the other hand, in the present embodiment, the process of forming the insulating resin coating layer 21 greatly affects the electrical characteristics and reliability of the electronic component 1. This is performed after completion of a plating process that is heavy and electrochemically loaded.

  For this reason, even if the characteristic inspection and screening process of the electronic component 1 are performed before the insulating resin coating layer 21 is formed, the electrical characteristics and reliability of the finally completed product are not impaired. In other words, electrical property inspection and screening can be performed using a highly productive electrical property inspection apparatus used for an electronic component having a conventional five-surface electrode structure. For this reason, a new equipment investment is not required for the inspection apparatus, and electrical characteristic inspection with high productivity is possible.

  In the present embodiment, the insulating resin coating layer 21 is formed after forming a plating layer made of Sn or Sn alloy.

  For example, the melting point of Sn constituting the Sn plating layers 35 and 45 is 231.9 ° C. For this reason, if it mounts at the peak temperature of 250 degreeC of the typical reflow furnace of lead-free solder, Sn plating layers 35 and 45 will melt. Therefore, the normal inorganic coating film formed on the Sn plating layers 35 and 45 may be peeled off or self-destructed. However, in the electronic component 1 of the present embodiment, since the insulating resin coating layer 21 has flexibility, it is possible to absorb distortion due to melting of the Sn plating layers 35 and 45 as the base. As a result, peeling of the insulating resin coating layer 21 does not occur during reflow.

  Further, since the insulating resin coating layer 21 has flexibility, it is possible to form the highly reliable electronic component 1 that is resistant to mechanical shock during product handling.

  By the way, surface mount type electronic components are generally supplied in a taping package in which individual electronic components are stored in a pocket of a carrier tape by a taping device. The electronic components that have been taped and packaged are surface mount mounters, and individual components are picked from the pockets of the carrier tape with a suction head and mounted on a mounting substrate. The mounting direction of the electronic component during mounting is determined by the direction in which the electronic component is stored in the pocket of the carrier tape.

  When the electronic component 1 of the present embodiment is mounted on a mounting board, the main surfaces 2c and 2d on which the insulating resin coating layer 21 is not formed are aligned so that they are parallel to the mounting surface of the mounting board. By mounting, the effect of the insulating resin coating layer 21 is exhibited, and high density mounting by narrow adjacency is enabled. Therefore, it is necessary to tap the main surfaces 2c and 2d on which the insulating resin coating layer 21 is not formed in the pocket of the carrier tape.

  In order to align the electronic components 1, it is necessary to select non-aligned components by an optical appearance check using a camera or a spectral color difference meter. Since the insulating resin coating layer 21 is optically impermeable or colored, this alignment can be performed at high speed and with high accuracy. Here, the optically opaque or coloring property is sufficient as long as the presence or absence of the insulating resin coating layer 21 can be identified by optical inspection, and the electrode portion on which the insulating resin coating layer 21 is formed. It is not necessary to completely hide the colors of 3a, 3e, 3f, 4b, 4e, 4f, end surfaces 2a, 2b, and side surfaces 2e, 2f.

  The preferred embodiments of the present invention have been described above. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  In this embodiment, the insulating resin coating layer 21 covers the side surfaces 2e and 2f, but it does not necessarily have to cover the side surfaces 2e and 2f. The insulating resin coating layer 21 only needs to cover at least the electrode portions 3e, 3f, 4e, and 4f. That is, the regions exposed from the electrode portions 3e, 3f, 4e, and 4f on the side surfaces 2e and 2f may not be covered with the insulating resin coating layer 21.

  In the present embodiment, a multilayer ceramic capacitor has been described as an example of an electronic component. However, the present invention is not limited to this, and other electronic devices such as a multilayer inductor, a multilayer varistor, a multilayer piezoelectric actuator, a multilayer thermistor, or a multilayer composite component can be used. It can also be applied to parts.

  In the present embodiment, the electronic component 1 having a five-surface electrode structure is taken as an example of the electronic component, but the present invention is not limited to this. For example, a so-called U-shaped three-surface electrode structure in which an external electrode is not formed on any one of the side surfaces 2e, 2f or the main surfaces 2c, 2d, such as a chip resistor, or end surfaces 2a, 2b The same effect can be obtained also in an electronic component having an L-shaped two-sided electrode structure in which external electrodes are formed on only one of the side surfaces 2e and 2f or the main surfaces 2c and 2d. The same effect can be obtained in an electronic component having a multi-terminal external electrode such as a multilayer capacitor array or a chip-type three-terminal feedthrough multilayer capacitor array.

  In an electronic component having a three-sided electrode structure or a two-sided electrode structure, the insulating resin coating layer 21 only needs to cover at least the electrode portions 3a and 4b.

  The present invention can be used for an electronic component such as a multilayer capacitor and a manufacturing method thereof.

  DESCRIPTION OF SYMBOLS 1 ... Electronic component, 2 ... Element body, 2a, 2b ... End surface, 2c, 2d ... Main surface, 2e, 2f ... Side surface, 3, 4 ... External electrode, 21 ... Insulating resin coating layer, 35, 45 ... Sn plating layer.

Claims (6)

A pair of end faces facing each other, a pair of main faces extending so as to connect the pair of end faces and facing each other, and a pair of side faces extending so as to connect the pair of main faces and facing each other. A pair of the principal surfaces parallel to the mounting surface when mounting;
An external electrode formed to cover at least a part of the main surface and a part of the side surface;
An insulating resin coating layer that is integrally formed so as to cover a portion of the external electrode formed to cover the side surface and surround the pair of end surfaces and the pair of side surfaces;
An electronic component, wherein a portion of the external electrode formed so as to cover the main surface and a region of the main surface not covered with the external electrode are not covered with the insulating resin coating layer. The external electrode is formed so as to further cover the end face,
The electronic component according to claim 1, wherein the insulating resin coating layer further covers a portion formed to cover the end surface of the external electrode. A pair of end faces facing each other, a pair of main faces extending so as to connect the pair of end faces and facing each other, and a pair of side faces extending so as to connect the pair of main faces and facing each other. A pair of the principal surfaces parallel to the mounting surface when mounting;
An external electrode formed to cover at least a part of the main surface and the end surface;
An insulating resin coating layer that is integrally formed so as to cover a portion of the external electrode that is formed to cover the end surface and surround the pair of end surfaces and the pair of side surfaces;
An electronic component, wherein a portion of the external electrode formed so as to cover the main surface and a region of the main surface not covered with the external electrode are not covered with the insulating resin coating layer.   The film thickness of the said insulating resin coating layer is set to the range of 2 micrometers or more and 30 micrometers or less, The electronic component as described in any one of Claims 1-3 characterized by the above-mentioned.   The said insulating resin coating layer is a layer which solidified the thermosetting type insulating resin coating agent or the ultraviolet curing type insulating resin coating agent, It is any one of Claims 1-4 characterized by the above-mentioned. Electronic components.   The electronic component according to claim 1, wherein the insulating resin coating layer has colorability or opacity.

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