US20010000986A1 - Mounting arrangement for multilayer electronic part - Google Patents

Mounting arrangement for multilayer electronic part Download PDF

Info

Publication number
US20010000986A1
US20010000986A1 US09/757,959 US75795901A US2001000986A1 US 20010000986 A1 US20010000986 A1 US 20010000986A1 US 75795901 A US75795901 A US 75795901A US 2001000986 A1 US2001000986 A1 US 2001000986A1
Authority
US
United States
Prior art keywords
ceramic sheet
electrodes
electronic part
sheet layers
multilayer electronic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US09/757,959
Other versions
US6381120B2 (en
Inventor
Norio Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to US09/757,959 priority Critical patent/US6381120B2/en
Publication of US20010000986A1 publication Critical patent/US20010000986A1/en
Application granted granted Critical
Publication of US6381120B2 publication Critical patent/US6381120B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00Fixed capacitors; Processes of their manufacture
    • H01G4/002Details
    • H01G4/228Terminals
    • H01G4/232Terminals electrically connecting two or more layers of a stacked or rolled capacitor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/041Printed circuit coils
    • H01F41/043Printed circuit coils by thick film techniques
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00Fixed capacitors; Processes of their manufacture
    • H01G4/30Stacked capacitors
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/0115Frequency selective two-port networks comprising only inductors and capacitors
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0021Constructional details
    • H03H2001/0085Multilayer, e.g. LTCC, HTCC, green sheets
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49117Conductor or circuit manufacturing
    • Y10T29/49124On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49126Assembling bases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49117Conductor or circuit manufacturing
    • Y10T29/49124On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49155Manufacturing circuit on or in base
    • Y10T29/49165Manufacturing circuit on or in base by forming conductive walled aperture in base

Definitions

  • the present invention relates to a multilayer electronic part, a method of producing the multilayer electronic part, and more particularly, to a multilayer electronic part (and a method of producing same) in which a plurality of outer electrodes are disposed on only the main surfaces of a multilayer body, and an end face of the multilayer body serves as a mounting surface for mounting the part on a mounting substrate.
  • Multilayer electronic parts which utilize chip capacitors and chip inductors are essential in obtaining miniaturization and higher performance of electronic devices. There is a demand for increased density and performance of such devices and, in response to this demand, a chip capacitor has been proposed in Japanese Patent Publication No. 57-56217.
  • FIG. 5 is a perspective view of such a chip capacitor 50 .
  • Chip capacitor 50 comprises a multilayer body 52 composed of a plurality of stacked sheet layers 51 made of ceramics; inner electrodes 53 made of copper or the like inside the multilayer body 52 ; and outer electrodes 54 disposed on an end face of the multilayer body 52 .
  • the inner electrodes 53 are connected to the outer electrodes 54 by lead electrodes 55 formed at the ends of the inner electrodes 53 .
  • the end face of the multilayer body 52 where the outer electrodes 54 are disposed serves as a mounting surface of the chip capacitor 50
  • the chip capacitor 50 is mounted on a printed board by connecting the outer electrodes 54 to a pad on the printed board using solder or the like.
  • the cutting surface is not sufficiently flat, and it is difficult to narrow a resultant space between the outer electrodes.
  • preferred embodiments of the present invention provide a multilayer electronic part that allows low production costs and narrowing of the space between outer electrodes, and a method of producing the multilayer electronic part.
  • One embodiment of the present invention provides a multilayer electronic part comprising: a multilayer body composed of a plurality of stacked sheet layers made of ceramics, said plurality of stacked sheet layers defining a stacking direction substantially perpendicular to a main surface of each of said plurality of stacked sheet layers; a plurality of inner electrodes and connecting means provided inside said multilayer body; and a plurality of outer electrodes disposed on only a main surface of said multilayer body so as to be electrically connected to any of said inner electrodes via said connecting means, and said multilayer body further comprising a mounting surface so that said said multilayer body is mounted at said mounting surface, said mounting surface being substantially parallel to said stacking direction.
  • Another embodiment of the present invention provides a method of producing a multilayer electronic part comprising the steps of: preparing a plurality of mother sheet layers made of ceramics; forming inner electrodes and connecting means on any one of said plurality of mother sheet layers; forming a mother multilayer body by stacking and press-bonding said plurality of mother sheet layers; forming an outer electrode on only a main surface of said mother multilayer body so as to be electrically connected to any one of said inner electrodes via said connecting means; cutting said mother multilayer body into a multilayer body having said inner electrode, said outer electrode, and said connecting means; and baking said mother multilayer body or said multilayer body.
  • the outer electrode is disposed on only the main surface of the base plate, it can be formed such that the mother multilayer body is not yet cut in the process of producing the multilayer electronic part.
  • the method of producing a multilayer electronic part of the present invention since the method includes the step of forming outer electrodes on the main surface of the mother multilayer body, it is possible to narrow the space between the outer electrodes.
  • FIG. 1 is an exploded perspective view of a multilayer electronic part according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the multilayer electronic part of FIG. 1 mounted on a mounting substrate.
  • FIGS. 3A to 3 D are cross-sectional views illustrating a method of producing the multilayer electronic part shown in FIG. 1.
  • FIG. 4 is an exploded perspective view showing a multilayer electronic part according to a second embodiment of the present invention.
  • FIG. 5 is a sectional view of a prior art chip capacitor.
  • FIG. 1 is an exploded perspective view showing a multilayer electronic part according to a first embodiment of the present invention.
  • a chip capacitor 10 is a multilayer electronic component and includes a multilayer body 11 composed of a plurality of stacked sheet layers 12 a to 12 f made of ceramics.
  • the chip capacitor also includes capacitor electrodes 13 a to 13 e serving as inner electrodes disposed within the multilayer body 11 ; via hole electrodes 14 serving as connectors; and outer electrodes 15 a and 15 b disposed on only the main surfaces 11 a and 11 b of the multilayer body 11 such that they are electrically connected to the capacitor electrodes 13 a and 13 e via the via hole electrodes 14 .
  • the capacitor electrodes 13 a , 13 c , and 13 e , and the capacitor electrodes 13 b and 13 d are electrically connected via the via hole electrodes 14 , respectively.
  • FIG. 2 is a cross-sectional view showing the chip capacitor 10 of FIG. 1 mounted on a mounting substrate.
  • the chip capacitor 10 is mounted on a printed board 1 , which serves as a mounting substrate, by connecting the outer electrodes 15 a and 15 b to a wiring pattern 2 on the printed board 1 using, e.g., solder 3 .
  • a lengthwise end face lic of the multilayer body 11 of the chip capacitor 10 is used as a mounting surface.
  • FIGS. 3A to 3 D are cross-sectional views which will be used in explaining a method of producing the chip capacitor 10 shown in FIG. 1.
  • through holes 22 are formed in the mother sheet layers 21 to 21 f by way of, for example, punching, and the capacitor electrodes 13 a to 13 e are formed on the mother sheet layers 21 b to 21 f , respectively, for example by screen-printing conductive paste thereon. Further, the via hole electrodes 14 are formed by disposing conductive paste in the through holes 22 (FIG. 3B).
  • a mother multilayer body 23 is formed by laying the plurality of mother sheet layers 21 a to 21 f on top of one another, conductive paste is screen-printed on only the main surfaces 23 a and 23 b of the mother multilayer body 23 such that the outer electrodes 15 a and 15 b are formed thereon.
  • the capacitor electrodes 13 a to 13 e on the mother sheet layers 21 b to 21 f , and the outer electrodes 15 a and 15 b on the main surfaces 23 a and 23 b of the mother multilayer body 23 are connected via the via hole electrodes 14 . Since the mother multilayer body 23 has not yet been subjected to cutting, the main surfaces 23 a and 23 b thereof with outer electrodes 15 a and 15 b have a high level of flatness (FIG. 3C).
  • the mother multilayer 11 provided with the capacitor electrodes 13 a to 13 e therein and the outer electrodes 15 a and 15 b on the main surfaces 23 a and 23 b thereof, is cut into blocks, each of which is to become a separate multilayer body 11 .
  • the multilayer body 11 , the capacitor electrodes 13 a to 13 e , the via hole electrodes 14 , and the outer electrodes 15 a and 15 b are baked together (FIG. 3D).
  • the chip capacitor 10 is completed, which has the capacitor electrodes 13 a to 13 e inside the multilayer body 11 , and the outer electrodes 15 a and 15 b formed on only the main surfaces 11 a and lib of the multilayer body 11 .
  • a chip inductor 30 is a multilayer electronic component and includes a multilayer body 31 composed of a plurality of stacked sheet layers 32 a to 32 f made of ceramics; inductor electrodes 33 a to 33 e serving as inner electrodes disposed inside the multilayer body 31 ; via hole electrodes 34 serving as connectors; and outer electrodes 35 a and 35 b formed on only the main surfaces 31 a and 31 b of the multilayer body 31 such that they are electrically connected to any of the inductor electrodes 33 a and 33 e via the via hole electrodes 34 .
  • the inductor electrodes 33 a and 33 b , the inductor electrodes 33 b and 33 c , the inductor electrodes 33 c and 33 d , and the inductor electrodes 33 d and 33 e are electrically connected, respectively, by the via hole electrodes 34 formed at one end of the inductor electrodes 33 a and 33 e.
  • the chip inductor 30 is mounted on a printed board (serving as a mounting substrate) by connecting the outer electrodes 35 a and 35 b to a wiring pattern on the printed board (e.g., using solder).
  • a lengthwise end face 31 c of the multilayer body 31 of the chip inductor 30 is used as a mounting surface, in a manner similar to that of the chip capacitor 10 of the first embodiment shown in FIG. 1.
  • the chip inductor 30 is produced using a method substantially similar to the production method of the chip capacitor 10 illustrated in FIGS. 3A to 3 D.
  • a chip capacitor or a chip inductor is used as the multilayer electronic part in the above embodiments
  • the present invention is also applicable to, for example, a chip resistor, a condenser (capacitor) array part, an inductor array part, or a resistor array part having a plurality of condensers, a plurality of inductors, and/or a plurality of resistors formed inside a multilayer body, and an LCR composite part having a condenser, an inductor, and a resistor formed inside a multilayer body.
  • the mother multilayer body is cut into blocks serving as multilayer bodies before the multilayer body, the inner electrodes, the connectors, and the outer electrodes are baked together in the above-described production method, it may alternatively be cut into 10 blocks after being baked together.
  • outer electrodes are formed on only the main surfaces of the base plate, they can be formed before the mother multilayer body is cut in the process of producing the multilayer electronic part.
  • the characteristics of individual multilayer electronic parts can be measured when the parts are combined in an assembly and, therefore, inspection can be completed in a short time, and the time necessary for the production process can be reduced.
  • the step of forming outer electrodes on the main surfaces of the mother multilayer body results in a high level of flatness before cutting and, therefore, it is possible to narrow any space between the outer electrodes, thereby reducing the size of the multilayer electronic parts produced according to the method.
  • outer electrodes can be formed precisely, it is possible to improve the yield of multilayer electronic parts, and to thereby reduce the costs thereof.

Abstract

A chip capacitor includes a multilayer body composed of a plurality of stacked sheet layers made of ceramics; capacitor electrodes and via hole electrodes disposed inside the multilayer body; and outer electrodes formed on only main surfaces of the multilayer body such that they are electrically connected to the capacitor electrodes via the via hole electrodes. Some of the capacitor electrodes are electrically connected by the via hole electrodes, and the other capacitor electrodes are electrically connected by other via hole electrodes.

Description

    BACKGROUND OF THE INVENTION
  • 1. 1. Field of the Invention
  • 2. The present invention relates to a multilayer electronic part, a method of producing the multilayer electronic part, and more particularly, to a multilayer electronic part (and a method of producing same) in which a plurality of outer electrodes are disposed on only the main surfaces of a multilayer body, and an end face of the multilayer body serves as a mounting surface for mounting the part on a mounting substrate.
  • 3. 2. Description of the Related Art
  • 4. Multilayer electronic parts which utilize chip capacitors and chip inductors are essential in obtaining miniaturization and higher performance of electronic devices. There is a demand for increased density and performance of such devices and, in response to this demand, a chip capacitor has been proposed in Japanese Patent Publication No. 57-56217.
  • 5.FIG. 5 is a perspective view of such a chip capacitor 50. Chip capacitor 50 comprises a multilayer body 52 composed of a plurality of stacked sheet layers 51 made of ceramics; inner electrodes 53 made of copper or the like inside the multilayer body 52; and outer electrodes 54 disposed on an end face of the multilayer body 52. In this case, the inner electrodes 53 are connected to the outer electrodes 54 by lead electrodes 55 formed at the ends of the inner electrodes 53. Although not shown, the end face of the multilayer body 52 where the outer electrodes 54 are disposed serves as a mounting surface of the chip capacitor 50, and the chip capacitor 50 is mounted on a printed board by connecting the outer electrodes 54 to a pad on the printed board using solder or the like.
  • 6. In multilayer electronic parts employing the above-described conventional chip capacitor, however, since the outer electrodes are formed on the end face of the multilayer body, it is necessary, in producing the chip capacitor, to cut a mother multilayer body into individual multilayer bodies and to subsequently form outer electrodes on an end face, which is the cutting face, of the individual multilayer bodies.
  • 7. As a result, the following problems arise:
  • 8. 1) The production process is complicated and, therefore, the production cost is high.
  • 9. 2) The cutting surface is not sufficiently flat, and it is difficult to narrow a resultant space between the outer electrodes.
  • 10. 3) It is impossible to measure the characteristics of individual multilayer electronic parts in the assembled state.
  • SUMMARY OF THE INVENTION
  • 11. To overcome the above described problems, preferred embodiments of the present invention provide a multilayer electronic part that allows low production costs and narrowing of the space between outer electrodes, and a method of producing the multilayer electronic part.
  • 12. One embodiment of the present invention provides a multilayer electronic part comprising: a multilayer body composed of a plurality of stacked sheet layers made of ceramics, said plurality of stacked sheet layers defining a stacking direction substantially perpendicular to a main surface of each of said plurality of stacked sheet layers; a plurality of inner electrodes and connecting means provided inside said multilayer body; and a plurality of outer electrodes disposed on only a main surface of said multilayer body so as to be electrically connected to any of said inner electrodes via said connecting means, and said multilayer body further comprising a mounting surface so that said said multilayer body is mounted at said mounting surface, said mounting surface being substantially parallel to said stacking direction.
  • 13. Another embodiment of the present invention provides a method of producing a multilayer electronic part comprising the steps of: preparing a plurality of mother sheet layers made of ceramics; forming inner electrodes and connecting means on any one of said plurality of mother sheet layers; forming a mother multilayer body by stacking and press-bonding said plurality of mother sheet layers; forming an outer electrode on only a main surface of said mother multilayer body so as to be electrically connected to any one of said inner electrodes via said connecting means; cutting said mother multilayer body into a multilayer body having said inner electrode, said outer electrode, and said connecting means; and baking said mother multilayer body or said multilayer body.
  • 14. According to the multilayer electronic part of the present invention, since the outer electrode is disposed on only the main surface of the base plate, it can be formed such that the mother multilayer body is not yet cut in the process of producing the multilayer electronic part.
  • 15. According to the method of producing a multilayer electronic part of the present invention, since the method includes the step of forming outer electrodes on the main surface of the mother multilayer body, it is possible to narrow the space between the outer electrodes.
  • 16. Further objects, features, and advantages of the present invention will become apparent from the following description of the preferred embodiments with reference to the attached drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • 17.FIG. 1 is an exploded perspective view of a multilayer electronic part according to a first embodiment of the present invention.
  • 18.FIG. 2 is a cross-sectional view showing the multilayer electronic part of FIG. 1 mounted on a mounting substrate.
  • 19.FIGS. 3A to 3D are cross-sectional views illustrating a method of producing the multilayer electronic part shown in FIG. 1.
  • 20.FIG. 4 is an exploded perspective view showing a multilayer electronic part according to a second embodiment of the present invention.
  • 21.FIG. 5 is a sectional view of a prior art chip capacitor.
  • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • 22.FIG. 1 is an exploded perspective view showing a multilayer electronic part according to a first embodiment of the present invention. A chip capacitor 10 is a multilayer electronic component and includes a multilayer body 11 composed of a plurality of stacked sheet layers 12 a to 12 f made of ceramics. The chip capacitor also includes capacitor electrodes 13 a to 13 e serving as inner electrodes disposed within the multilayer body 11; via hole electrodes 14 serving as connectors; and outer electrodes 15 a and 15 b disposed on only the main surfaces 11 a and 11 b of the multilayer body 11 such that they are electrically connected to the capacitor electrodes 13 a and 13 e via the via hole electrodes 14.
  • 23. In this case, the capacitor electrodes 13 a, 13 c, and 13 e, and the capacitor electrodes 13 b and 13 d are electrically connected via the via hole electrodes 14, respectively.
  • 24.FIG. 2 is a cross-sectional view showing the chip capacitor 10 of FIG. 1 mounted on a mounting substrate. The chip capacitor 10 is mounted on a printed board 1, which serves as a mounting substrate, by connecting the outer electrodes 15 a and 15 b to a wiring pattern 2 on the printed board 1 using, e.g., solder 3. A lengthwise end face lic of the multilayer body 11 of the chip capacitor 10 is used as a mounting surface.
  • 25.FIGS. 3A to 3D are cross-sectional views which will be used in explaining a method of producing the chip capacitor 10 shown in FIG. 1.
  • 26. First, a plurality of mother sheet layers 21 a to 21 f made of ceramics are prepared (FIG. 3A).
  • 27. Next, through holes 22 are formed in the mother sheet layers 21 to 21 f by way of, for example, punching, and the capacitor electrodes 13 a to 13 e are formed on the mother sheet layers 21 b to 21 f, respectively, for example by screen-printing conductive paste thereon. Further, the via hole electrodes 14 are formed by disposing conductive paste in the through holes 22 (FIG. 3B).
  • 28. After a mother multilayer body 23 is formed by laying the plurality of mother sheet layers 21 a to 21 f on top of one another, conductive paste is screen-printed on only the main surfaces 23 a and 23 b of the mother multilayer body 23 such that the outer electrodes 15 a and 15 b are formed thereon. In this case, the capacitor electrodes 13 a to 13 e on the mother sheet layers 21 b to 21 f, and the outer electrodes 15 a and 15 b on the main surfaces 23 a and 23 b of the mother multilayer body 23 are connected via the via hole electrodes 14. Since the mother multilayer body 23 has not yet been subjected to cutting, the main surfaces 23 a and 23 b thereof with outer electrodes 15 a and 15 b have a high level of flatness (FIG. 3C).
  • 29. Next, the mother multilayer 11, provided with the capacitor electrodes 13 a to 13 e therein and the outer electrodes 15 a and 15 b on the main surfaces 23 a and 23 b thereof, is cut into blocks, each of which is to become a separate multilayer body 11. Subsequently, the multilayer body 11, the capacitor electrodes 13 a to 13 e, the via hole electrodes 14, and the outer electrodes 15 a and 15 b are baked together (FIG. 3D).
  • 30. According to the above-described production method, the chip capacitor 10 is completed, which has the capacitor electrodes 13 a to 13 e inside the multilayer body 11, and the outer electrodes 15 a and 15 b formed on only the main surfaces 11 a and lib of the multilayer body 11.
  • 31.FIG. 4 is an exploded perspective view of a multilayer electronic part according to a second embodiment of the present invention. A chip inductor 30 is a multilayer electronic component and includes a multilayer body 31 composed of a plurality of stacked sheet layers 32 a to 32 f made of ceramics; inductor electrodes 33 a to 33 e serving as inner electrodes disposed inside the multilayer body 31; via hole electrodes 34 serving as connectors; and outer electrodes 35 a and 35 b formed on only the main surfaces 31 a and 31 b of the multilayer body 31 such that they are electrically connected to any of the inductor electrodes 33 a and 33 e via the via hole electrodes 34.
  • 32. In this case, the inductor electrodes 33 a and 33 b, the inductor electrodes 33 b and 33 c, the inductor electrodes 33 c and 33 d, and the inductor electrodes 33 d and 33 e are electrically connected, respectively, by the via hole electrodes 34 formed at one end of the inductor electrodes 33 a and 33 e.
  • 33. Although not shown, the chip inductor 30 is mounted on a printed board (serving as a mounting substrate) by connecting the outer electrodes 35 a and 35 b to a wiring pattern on the printed board (e.g., using solder). A lengthwise end face 31 c of the multilayer body 31 of the chip inductor 30 is used as a mounting surface, in a manner similar to that of the chip capacitor 10 of the first embodiment shown in FIG. 1.
  • 34. The chip inductor 30 is produced using a method substantially similar to the production method of the chip capacitor 10 illustrated in FIGS. 3A to 3D.
  • 35. While a chip capacitor or a chip inductor is used as the multilayer electronic part in the above embodiments, the present invention is also applicable to, for example, a chip resistor, a condenser (capacitor) array part, an inductor array part, or a resistor array part having a plurality of condensers, a plurality of inductors, and/or a plurality of resistors formed inside a multilayer body, and an LCR composite part having a condenser, an inductor, and a resistor formed inside a multilayer body.
  • 36. While the mother multilayer body is cut into blocks serving as multilayer bodies before the multilayer body, the inner electrodes, the connectors, and the outer electrodes are baked together in the above-described production method, it may alternatively be cut into 10 blocks after being baked together.
  • 37. According to the multilayer electronic part of the present invention, since outer electrodes are formed on only the main surfaces of the base plate, they can be formed before the mother multilayer body is cut in the process of producing the multilayer electronic part.
  • 38. This makes it possible to simplify the production process and to reduce the production cost. As a result, it is possible to achieve a low-cost multilayer electronic part.
  • 39. In accordance with the invention, the characteristics of individual multilayer electronic parts can be measured when the parts are combined in an assembly and, therefore, inspection can be completed in a short time, and the time necessary for the production process can be reduced.
  • 40. According to the method of producing a multilayer electronic part of the present invention, the step of forming outer electrodes on the main surfaces of the mother multilayer body results in a high level of flatness before cutting and, therefore, it is possible to narrow any space between the outer electrodes, thereby reducing the size of the multilayer electronic parts produced according to the method.
  • 41. Furthermore, since the outer electrodes can be formed precisely, it is possible to improve the yield of multilayer electronic parts, and to thereby reduce the costs thereof.
  • 42. While the present invention has been described with reference to what are presently considered to be the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. On the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims (17)

What is claimed is:
1. A multilayer electronic part, comprising:
a multilayer body including a plurality of stacked ceramic sheet layers, each layer having spaced apart opposing main surfaces and being stacked in a direction which is substantially perpendicular to the main surfaces of the layers, the multilayer body including first and second opposing main outer surfaces defined by one of the opposing main surfaces of each outermost stacked ceramic sheet layer;
a plurality of inner electrodes disposed on at least some of the main surfaces of the ceramic sheet layers;
a plurality of connectors disposed within the multilayer body, the connectors electrically coupling respective inner electrodes; and
a plurality of outer electrodes, at least one of the outer electrodes disposed on each main outer surface of the multilayer body, each of the outer electrodes being electrically connected to at least one of the inner electrodes via at least one of the connectors.
2. The multilayer electronic part of
claim 1
, wherein each connector includes an aperture extending between main surfaces of a corresponding one of the ceramic sheet layers, the aperture being substantially filled with a conductive material which provides an electrical connection from one of the inner electrodes, through the ceramic sheet layer, to at least one of (i) another inner electrode; and (ii) one of the outer electrodes.
3. The multilayer electronic part of
claim 2
, wherein each ceramic sheet layer, having one of the inner electrodes, includes at least one connector operable to electrically couple that inner electrode to at least one of (i) another inner electrode of another ceramic sheet layer; and (ii) one of the outer electrodes.
4. The multilayer electronic part of
claim 3
, wherein at least one of the ceramic sheet layers, having one of the inner electrodes, includes at least one connector which does not electrically couple that inner electrode to any other electrode.
5. The multilayer electronic part of
claim 4
, comprising N ceramic sheet layers, each being designatable as an n-th ceramic sheet layer, n=0, 1, 2, 3, . . . N, the n=0 and n=N ceramic sheet layers being the outermost ceramic sheet layers, wherein substantially all of the ceramic sheet layers, other than the outermost ceramic sheet layers, include:
one of the inner electrodes disposed on a main surface thereof;
at least one first connector operable to electrically couple that inner electrode to another inner electrode of ceramic sheet layer which is at least one of (i) n+2 layers away therefrom, and (ii) n−2 layers away therefrom; and
at least one second connector which electrically couples electrodes of directly adjacent ceramic sheet layers together.
6. The multilayer electronic part of
claim 5
, wherein each of the outermost ceramic sheet layers include at least one connector operable to electrically couple the outer electrode thereof to the inner electrode of a directly adjacent ceramic sheet layer.
7. The multilayer electronic part of
claim 6
, wherein the ceramic sheet layers form a capacitor.
8. The multilayer electronic part of
claim 3
, wherein substantially all of the ceramic sheet layers, other than the outermost ceramic sheet layers, include:
one of the inner electrodes disposed on a main surface thereof;
at least one first connector operable to electrically couple that inner electrode to inner electrodes of directly adjacent ceramic sheet layers.
9. The multilayer electronic part of
claim 8
, wherein each of the outermost ceramic sheet layers include at least one connector operable to electrically couple the outer electrode thereof to the inner electrode of a directly adjacent ceramic sheet layer.
10. The multilayer electronic part of
claim 8
, wherein each of the inner electrodes are in the form of strip lines, each strip line forming a portion of a coil, the multilayer electronic part forming an inductor.
11. The multilayer electronic part of
claim 1
, wherein each of the ceramic sheet layers is a parallelepiped, end faces thereof defining respective thicknesses.
12. The multilayer electronic part of
claim 11
, wherein each ceramic sheet layer includes at least one end face disposed substantially perpendicular to and between the spaced apart opposing main surfaces, said ceramic sheet layers being stacked such that said end faces form a mounting surface oriented substantially parallel to the stacking direction.
13. The multilayer electronic part of
claim 12
, wherein the outer electrodes are sized and shaped to provide an electrical connection with a printed circuit board when the mounting surface is oriented proximate to the printed circuit board.
14. A method of producing a multilayer electronic part, comprising the steps of:
forming a plurality of mother ceramic sheet layers such that each mother ceramic sheet layer includes spaced apart opposing main surfaces;
forming a plurality of inner electrodes on the main surfaces of at least some of the mother ceramic sheet layers;
forming a plurality of connectors in the at least some mother ceramic sheet layers, at least some of the connectors being electrically coupled to corresponding inner electrodes;
forming a plurality of outer electrodes, at least one outer electrode on one main surface of each of a first and second one of the mother ceramic sheet layers;
stacking the mother ceramic sheet layers one atop the other in a direction which is substantially perpendicular to the main surfaces of the layers such that: (i) the first and second ceramic sheet layers are outermost layers and define first and second opposing main outer surfaces of the stack, (ii) the connectors electrically couple, respective inner electrodes to one another, and each of the outer electrodes to at least one of the inner electrodes;
press-bonding the plurality of stacked mother ceramic sheet layers to obtain a mother multilayer body; and
cutting the mother multilayer body into separate multilayer bodies, each having: a plurality of stacked ceramic sheet layers, a plurality of inner electrodes, first and second outer electrodes on opposing main outer surfaces of the multilayer body, and a plurality of connectors electrically connecting at least some of the electrodes together.
15. The method of producing the multilayer electronic part of
claim 14
, further comprising the step of baking the ceramic sheet layer one of before and after the cutting step.
16. The method of producing the multilayer electronic part of
claim 15
, wherein the step of forming the connectors includes the steps of:
forming an aperture extending between main surfaces of a corresponding one of the ceramic sheet layers; and
filling the aperture with a conductive material.
17. The method of producing the multilayer electronic part of
claim 16
, wherein the step of forming the connectors results in each ceramic sheet layer, having one of the inner electrodes thereon, including at least one connector operable to electrically couple that inner electrode to at least one of (i) another inner electrode of another ceramic sheet layer, (ii) one of the outer electrodes, and (iii) no other electrode.
US09/757,959 1998-08-25 2001-01-10 Mounting arrangement for multilayer electronic part Expired - Lifetime US6381120B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/757,959 US6381120B2 (en) 1998-08-25 2001-01-10 Mounting arrangement for multilayer electronic part

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10238827A JP2000068149A (en) 1998-08-25 1998-08-25 Laminated electronic component and manufacture therefor
JP10-238827 1998-08-25
US09/372,547 US6236558B1 (en) 1998-08-25 1999-08-11 Multilayer electronic part
US09/757,959 US6381120B2 (en) 1998-08-25 2001-01-10 Mounting arrangement for multilayer electronic part

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US09/372,547 Division US6236558B1 (en) 1998-08-25 1999-08-11 Multilayer electronic part

Publications (2)

Publication Number Publication Date
US20010000986A1 true US20010000986A1 (en) 2001-05-10
US6381120B2 US6381120B2 (en) 2002-04-30

Family

ID=17035870

Family Applications (4)

Application Number Title Priority Date Filing Date
US09/372,547 Expired - Lifetime US6236558B1 (en) 1998-08-25 1999-08-11 Multilayer electronic part
US09/757,964 Abandoned US20010000987A1 (en) 1998-08-25 2001-01-10 Multilayer electronic part and method of producing the same
US09/757,959 Expired - Lifetime US6381120B2 (en) 1998-08-25 2001-01-10 Mounting arrangement for multilayer electronic part
US10/620,086 Abandoned US20040111880A1 (en) 1998-08-25 2003-07-14 Multilayer electronic part and method of producing the same

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US09/372,547 Expired - Lifetime US6236558B1 (en) 1998-08-25 1999-08-11 Multilayer electronic part
US09/757,964 Abandoned US20010000987A1 (en) 1998-08-25 2001-01-10 Multilayer electronic part and method of producing the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/620,086 Abandoned US20040111880A1 (en) 1998-08-25 2003-07-14 Multilayer electronic part and method of producing the same

Country Status (2)

Country Link
US (4) US6236558B1 (en)
JP (1) JP2000068149A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000068149A (en) * 1998-08-25 2000-03-03 Murata Mfg Co Ltd Laminated electronic component and manufacture therefor
JP2006173270A (en) * 2004-12-14 2006-06-29 Tdk Corp Chip type electronic component
DE102005036102A1 (en) * 2005-08-01 2007-02-08 Epcos Ag Electrical component
JP2009295683A (en) * 2008-06-03 2009-12-17 Tdk Corp Chip-type electronic part
WO2013008874A1 (en) * 2011-07-14 2013-01-17 株式会社村田製作所 Wireless communication device
KR101376839B1 (en) * 2012-10-12 2014-03-20 삼성전기주식회사 Multi-layered ceramic capacitor

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071878A (en) * 1975-02-18 1978-01-31 N L Industries, Inc. Method for producing capacitors and ceramic body therefore
DE3873206D1 (en) * 1987-07-31 1992-09-03 Siemens Ag FILLED LAYER COMPONENT WITH A SINTERED, MONOLITHIC CERAMIC BODY AND METHOD FOR THE PRODUCTION THEREOF.
DE3909528A1 (en) * 1988-03-23 1989-10-12 Murata Manufacturing Co IMPACT FILTER
DE3930000A1 (en) * 1988-09-08 1990-03-15 Murata Manufacturing Co VARISTOR IN LAYER DESIGN
JPH02135702A (en) * 1988-11-16 1990-05-24 Murata Mfg Co Ltd Lamination type varistor
JPH0710030B2 (en) * 1990-05-18 1995-02-01 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン Method for manufacturing multilayer wiring board
JPH07169649A (en) * 1993-12-16 1995-07-04 Tdk Corp Multilayer through-type capacitor array
JP3651925B2 (en) * 1994-04-27 2005-05-25 京セラ株式会社 Manufacturing method of multilayer capacitor substrate
US5576926A (en) * 1995-04-03 1996-11-19 American Technical Ceramics Corporation Capacitor with buried isolated electrode
JPH08316766A (en) * 1995-05-16 1996-11-29 Murata Mfg Co Ltd Lc filter
JP3687204B2 (en) * 1996-07-22 2005-08-24 松下電器産業株式会社 Multilayer wiring pattern forming method
US5774340A (en) * 1996-08-28 1998-06-30 International Business Machines Corporation Planar redistribution structure and printed wiring device
US6080468A (en) * 1997-02-28 2000-06-27 Taiyo Yuden Co., Ltd. Laminated composite electronic device and a manufacturing method thereof
JP2000068149A (en) * 1998-08-25 2000-03-03 Murata Mfg Co Ltd Laminated electronic component and manufacture therefor

Also Published As

Publication number Publication date
US6381120B2 (en) 2002-04-30
JP2000068149A (en) 2000-03-03
US20010000987A1 (en) 2001-05-10
US20040111880A1 (en) 2004-06-17
US6236558B1 (en) 2001-05-22

Similar Documents

Publication Publication Date Title
EP0433176B1 (en) A multilayer hybrid circuit
US6778058B1 (en) Embedded 3D coil inductors in a low temperature, co-fired ceramic substrate
JP2976049B2 (en) Multilayer electronic components
US20030006065A1 (en) Monolithic ceramic electronic component, method for manufacturing the same, and electronic device
JP5429376B2 (en) Multilayer ceramic electronic component and manufacturing method thereof
KR100489820B1 (en) Ceramic Multilayer Substrate and its Manufacturing Process
US6236558B1 (en) Multilayer electronic part
US6922129B2 (en) High-work-efficiency multilayered circuit board
JPH03219605A (en) Laminated-type inductance element
US6551426B2 (en) Manufacturing method for a laminated ceramic electronic component
US6597056B1 (en) Laminated chip component and manufacturing method
JPH0653045A (en) Substrate transformer and its manufacture
JPH08316643A (en) Wiring board
JP3064751B2 (en) Method for manufacturing multilayer jumper chip
US6707681B2 (en) Surface mount typed electronic circuit of small size capable of obtaining a high-Q
JPH022318B2 (en)
JP4333659B2 (en) Flexible wiring board
JP3166158B2 (en) Structure of multilayer circuit components
JPH0945830A (en) Chip electronic component
KR100519813B1 (en) terminal structure of multi-layer substrate and its manufacture
JP3215684B2 (en) Multilayer electronic component, its mounting structure and manufacturing method
KR0121767Y1 (en) A multilayer hybrid circuit
JPS6334257Y2 (en)
JP2005136266A (en) Ceramic multilayer wiring circuit board, method for manufacturing the same, and semiconductor device
JPH11330887A (en) Distributed constant type noise filter and manufacture of the same

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 12