WO2013172213A1 - インクジェット用インク、印刷方法およびセラミック電子部品 - Google Patents
インクジェット用インク、印刷方法およびセラミック電子部品 Download PDFInfo
- Publication number
- WO2013172213A1 WO2013172213A1 PCT/JP2013/062810 JP2013062810W WO2013172213A1 WO 2013172213 A1 WO2013172213 A1 WO 2013172213A1 JP 2013062810 W JP2013062810 W JP 2013062810W WO 2013172213 A1 WO2013172213 A1 WO 2013172213A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ceramic
- particles
- ink
- viscosity
- particle size
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/36—Inkjet printing inks based on non-aqueous solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/008—Selection of materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/008—Selection of materials
- H01G4/0085—Fried electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/012—Form of non-self-supporting electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
- H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
- H01G4/248—Terminals the terminals embracing or surrounding the capacitive element, e.g. caps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S260/00—Chemistry of carbon compounds
- Y10S260/38—Ink
Definitions
- the present invention relates to an ink-jet ink, and particularly to an ink-jet ink that is suitably used in the manufacture of ceramic electronic components. Furthermore, the present invention relates to a printing method implemented using the ink-jet ink and a ceramic electronic component configured using the ink-jet ink.
- a process of forming electrodes is performed.
- One of the methods for forming this electrode is to apply screen printing or gravure printing, and apply conductive paste containing metal powder as a conductive component to the element part made of ceramic or the like.
- the screen printing method or the gravure printing method as described above is suitable for mass production, it is not suitable for production of a small variety of products or formation of complicated pattern electrodes because a printing plate is used. Therefore, an inkjet printing method has attracted attention as a new printing method.
- the conductive paste or conductive ink used in the screen printing method or gravure printing method cannot be used as it is.
- the following has been proposed as a conductive ink that can be applied in the ink jet printing method.
- Patent Document 1 an organic solvent-based conductive material containing a metal powder having a particle size of 10 ⁇ m or less, a viscosity of 200 mPa ⁇ s or less, and a sedimentation of 10 mm or less in 10 minutes or 20 mm or less in 100 minutes. Sex inks have been proposed.
- Patent Document 2 an organic solvent containing metal particles having a particle size of 100 nm or less, preferably 10 nm or less, having a viscosity of 1 to 100 mPa ⁇ s and a surface tension of 25 to 80 mN / m.
- System conductive inks have been proposed.
- Patent Document 3 Japanese Patent No. 4303715 is not intended for ink jet printing, but contains conductive particles and is common with a dielectric ceramic constituting a ceramic body of a ceramic electronic component to be used. It contains co-material (dielectric) particles composed of the main components, the conductive particle diameter is 10 to 1000 nm, and the ratio of the co-material particle diameter to the conductive particle diameter is 0.1 to 0.25. There has been proposed an organic solvent-based conductive paste in which the amount of common material added is 5 to 30% by weight with respect to 100% by weight of particles. In addition, as described in Table 4 of Patent Document 3, the particle size of the co-material particles used in the examples is 30 nm at the minimum, and data when the co-material particle size is less than that is shown. Absent.
- Patent Document 4 proposes an aqueous metal ink for ink jet printing having a viscosity of 35 mPa ⁇ s or less.
- an ionic resin is used for the dispersant and the binder.
- the particle size of the metal powder contained in the water-based metal ink described in Patent Document 4 is 50 to 400 nm.
- this water-based metal ink is also composed of a co-material (barium titanate powder), but Patent Document 4 does not describe the particle size range of the co-material, and in the examples, the particle size is 200 nm. Only barium titanate powder is disclosed.
- the ink containing metal particles having a particle size of less than 50 nm for example, within the range of 100 nm or less, which is the particle size of the metal particles described in Patent Document 2, is colloidal and thus settled in comparison with the large metal particles. It is relatively easy to form a printed film having the same thickness stably.
- ink containing metal particles having a particle size in the range of 50 to 100 nm variation in coating thickness due to sedimentation tends to occur, and it is difficult to stably form a printed film having the same thickness.
- the particle size is 50 nm or more, a problem that dots and figures after printing tend to be noticeably blurred occurs.
- the printed film formed of ink containing metal particles with a particle size of 100 nm or less has a very low thermal shrinkage start temperature compared to the ceramic layer, causing a shrinkage difference during firing, and structural defects such as cracks in the ceramic electronic component. Is likely to occur.
- the conductive paste described in Patent Document 3 does not have rheology suitable for ink jet printing.
- a conductive paste for screen printing is disclosed. If the viscosity is such that ink jet printing is possible, a problem that dots and figures after printing tend to be noticeably blurred occurs when the conductive particle diameter is 50 nm or more. Further, in the conductive paste described in Patent Document 3, the ratio of the common material particle diameter to the conductive particle diameter is too large as 0.1 to 0.25. Therefore, in the region where the conductive particle diameter is 150 nm or more, the conductive particle Sedimentation of becomes apparent. For this reason, it is difficult to stably form printed films having the same thickness.
- the metal ink described in Patent Document 4 is a water-based ink
- the drying speed is extremely slow.
- the printing speed cannot be increased because the bleeding of printing becomes obvious and the drying time becomes long.
- the pores are increased to make a ceramic sheet with water absorption, as in general inkjet paper, the problem of bleeding can be solved, but shrinkage occurs significantly during firing, resulting in structural defects in ceramic electronic components.
- the water-based ink has a low degree of freedom in selecting an applicable binder, and is not suitable for printing for ceramic electronic components.
- Patent Document 5 proposes forming a step absorption layer for absorbing a step due to the thickness of the internal electrode by inkjet printing of ceramic ink. Yes.
- Patent Document 6 discloses a selection from (a) a functional material, (b) an organic polymer containing polyvinylpyrrolidone, and (c) an organic solvent, water, or a mixture thereof.
- Ink-jet printable ink compositions for a substrate are described, wherein a functional material and an organic polymer are dispersed in the dispersion vehicle.
- the viscosity of the ink composition is between 5 mPa ⁇ s and 50 mPa ⁇ s at a temperature of 25 to 35 ° C.
- the functional material is a material having a function such as conductivity, resistance, or dielectric, and specific examples include various metals and barium titanate.
- the particle diameter of the functional material is preferably in the range of 0.005 ⁇ m to 2 ⁇ m as D50.
- the ink composition described in Patent Document 6 can be used for forming electrodes in ceramic electronic components while applying inkjet printing,
- the functional material included is ceramic (resistor or dielectric), for forming a step absorption layer for absorbing a step due to the thickness of the internal electrode in the multilayer ceramic electronic component while applying inkjet printing Can be used.
- the particle size of the functional material is less than 50 nm, it becomes colloidal, so that the sedimentation of the particles can be suppressed, but the BET equivalent particle size before firing of the main component particles of the ceramic part of a general ceramic electronic component (100 nm or more) ) And a relatively large shrinkage difference during firing, resulting in structural defects such as cracks in the ceramic electronic component.
- the inkjet ink is required to have a lower viscosity than the ink or paste used in the conventional screen printing method or gravure printing method.
- functional particles conductive particles or ceramic particles
- sedimentation of metal particles and significant blurring of printed dots or figures are problems. It becomes.
- particle size of the functional particles is less than 50 nm, structural defects are likely to occur during firing of the ceramic electronic component.
- an inkjet ink containing particles having a particle diameter of 50 nm or more needs to satisfy all three characteristics such as a viscosity characteristic capable of ink jet printing, a sedimentation characteristic capable of stable printing, and a characteristic difficult to bleed after printing. Furthermore, when applied to a ceramic electronic component, in addition to the above three characteristics, it is necessary to satisfy a heat shrink characteristic that does not cause structural defects.
- the problem of sedimentation is relatively small in water-based inks because the particles are dispersed and stabilized by the electrostatic repulsion force and steric repulsion force of the ionic resin.
- the electrostatic repulsive force is not generated, so that the ink is greatly manifested.
- ⁇ s ⁇ Dp 2 ( ⁇ p ⁇ f) g ⁇ / 18 ⁇ (Where ⁇ s is the particle settling velocity, Dp is the particle diameter, ⁇ p is the particle specific gravity, ⁇ f is the dispersion medium specific gravity, g is the gravitational acceleration, and ⁇ is the dispersion medium viscosity.) From the Stokes' formula, it can be seen that increasing the dispersion medium viscosity ⁇ is effective to suppress the problem of particle sedimentation in the organic ink in which particles having a particle diameter of 50 nm or more are dispersed.
- the Stokes equation ⁇ is interpreted as the spatial viscosity (vehicle viscosity). Therefore, it can be concluded that an increase in ⁇ can be realized only by an approach in which the viscosity is expressed only in a space such as increasing the viscosity of the solvent, adding a resin that increases the viscosity, or adding a thixotropic agent.
- the spatial viscosity is developed to a level where particle sedimentation can be suppressed, the problem will be that ink jet printing becomes impossible even at the moment of ink jet printing where high shear force is applied (viscosity does not drop sufficiently).
- an object of the present invention is to provide ink printing that is suitable for use in forming an electrode or a step absorption layer of a ceramic electronic component by ink jet printing, that is, the above-described ink jet printing while containing functional particles having a particle size of 50 nm or more.
- ink jet printing that is, the above-described ink jet printing while containing functional particles having a particle size of 50 nm or more.
- it further satisfies heat shrinkage characteristics that do not cause structural defects. It is to provide ink for inkjet.
- Another object of the present invention is to provide a printing method carried out using the ink-jet ink described above.
- Still another object of the present invention is to provide a ceramic electronic component constituted by using the ink jet ink described above.
- the present invention is first directed to an inkjet ink.
- the ink-jet ink according to the present invention comprises functional particles having an average particle diameter (hereinafter simply referred to as “average particle diameter”) of 50 to 1000 nm and rheology adjusting particles having an average particle diameter of 4 to 40 nm.
- the viscosity at a shear rate of 1000 s ⁇ 1 is 1 to 50 mPa ⁇ s
- the rheology adjusting particles are preferably made of ceramic. More specifically, when the functional particles are made of a material having a relatively low melting point such as a metal, the inclusion of the rheology-adjusting particles made of ceramic can provide a sufficient shrinkage suppression effect and, consequently, a structural defect suppression effect. Thus, it is possible to manufacture a ceramic electronic component that is less likely to cause structural defects such as cracks after firing. On the other hand, when the functional particles are made of ceramic, it is possible to produce a ceramic electronic component in which structural defects such as cracks are less likely to occur after firing without impairing the thermal shrinkage characteristics of the functional particles.
- the rheology adjusting particles are made of an oxide having a perovskite structure.
- the ink-jet ink according to the present invention can be given more suitable characteristics for forming electrodes for ceramic electronic components.
- the organic vehicle is a mixture of at least one resin selected from a cellulose resin, an acrylic resin, and a cyclic acetal resin and an organic solvent. Special characteristics.
- the addition amount of the rheology adjusting particles is preferably 3.0 to 42.4 parts by volume.
- the higher rheology adjustment effect is acquired by the particle
- the functional particles are made of a material having a relatively low melting point such as a metal, the shrinkage suppressing effect can be obtained by the rheology adjusting particles.
- the functional particle is a conductive particle.
- the electrode said here may be an external electrode formed on the outer surface of a ceramic body, and may be an internal electrode built in the inside of a ceramic body.
- the conductive particles preferably include at least one metal selected from the group consisting of Au, Pt, Ag, Ni, Cu, Al, and Fe, or at least one metal selected from this group. It consists of an alloy containing. These metals are suitable as materials for electrodes in ceramic electronic components.
- the main component of the rheology adjusting particles is preferably the same as the main component of the ceramic body.
- the ink-jet ink according to the present invention can be given more suitable properties as ink for electrode formation in ceramic electronic components.
- the functional particles are Ceramic particles.
- the main component of the ceramic particles serving as the functional particles is preferably the same as the main component of the ceramic layer.
- the ink for inkjet which concerns on this invention can be made more suitable as an object for level
- the average particle size of the functional particles is preferably in the range of 48 to 152% with respect to the average particle size before firing of the ceramic main component particles contained in the ceramic layer.
- the ink jet ink according to the present invention can be given more suitable properties as the ink for forming the step absorption layer in the ceramic electronic component.
- the present invention is also directed to a printing method in which a printing film made of the above-described inkjet ink is formed by an inkjet apparatus.
- the present invention is also directed to a ceramic electronic component configured using the ink jet ink described above.
- the ceramic electronic component according to the present invention includes an electrode formed by firing a printed film formed using an inkjet ink, and a ceramic body that holds the electrode.
- the ink-jet ink those in which the functional particles are conductive particles are used.
- a ceramic electronic component in a second embodiment, includes a ceramic body having a laminated structure composed of a plurality of laminated ceramic layers, an internal electrode formed along an interface between ceramic layers, and a ceramic interlayer.
- the ink for ink jetting an ink whose functional material is ceramic particles is used as the ink for ink jetting.
- a ceramic electronic component comprises a ceramic body having a laminated structure composed of a plurality of laminated ceramic layers, an internal electrode formed along an interface between ceramic layers, and a ceramic layer.
- the printed film is fired.
- the ink for ink jet for forming the internal electrode those in which the functional particles are conductive particles are used, and as the ink for ink jet for forming the step absorption layer, the functional material is ceramic particles. Is used.
- inkjet ink According to the inkjet ink according to the present invention, smooth and stable inkjet printing is possible, and bleeding of the printed film can be made difficult to occur.
- printing without a printing plate is possible, so that it is easy to form a printing film of a small variety of products and complex figures.
- the ceramic electronic component according to the present invention it is possible to make it difficult for structural defects to occur there.
- FIG. 1 is a cross-sectional view illustrating a multilayer ceramic capacitor 1 as an example of a ceramic electronic component configured using an inkjet ink according to the present invention. It is a perspective view which shows the ceramic green sheet 10 prepared in manufacturing the multilayer ceramic capacitor 1 shown in FIG.
- FIG. 1 a multilayer ceramic capacitor 1 constructed using the ink jet ink according to the present invention will be described.
- the multilayer ceramic capacitor 1 includes a ceramic body 3 having a multilayer structure composed of a plurality of ceramic layers 2 that are stacked, and a plurality of first and second layers respectively formed along a plurality of interfaces between the ceramic layers 2. Internal electrodes 4 and 5 are provided.
- the ceramic layer 2 is made of a dielectric ceramic.
- the first internal electrode 4 and the second internal electrode 5 are opposed to each other through the ceramic layer 2 so as to form a capacitance, and are alternately arranged as viewed in the stacking direction.
- a first external electrode 6 is formed on one end surface of the ceramic body 3 so as to be electrically connected to the first internal electrode 4, and a second internal electrode 5 is formed on the other end surface.
- a second external electrode 7 is formed so as to be electrically connected to.
- a ceramic green sheet 10 as shown in FIG. 2 is prepared.
- the ceramic green sheet 10 is to be the ceramic layer 2.
- the ceramic green sheet actually prepared for mass production of the multilayer ceramic capacitor 1 has a dimension that allows a plurality of multilayer ceramic capacitors 1 to be taken out by a cutting process to be performed later. 2 shows a ceramic green sheet 10 for one multilayer ceramic capacitor 1 for convenience of explanation.
- an internal electrode printing film 11 to be the internal electrode 4 or 5 is formed on one main surface of the ceramic green sheet 10.
- the internal electrode printed film 11 has a predetermined thickness. Therefore, a step due to this thickness is generated on the ceramic green sheet 10.
- a step absorption printing film 12 is formed in the region where the internal electrode printing film 11 is not formed on the main surface of the ceramic green sheet 10.
- the step absorption printing film 12 serves as a step absorption layer for absorbing a step due to the thickness of the internal electrode printing film 11 described above.
- the step of forming the step absorption printing film 11 may be performed before the step of forming the internal electrode printing film 11.
- the step absorption layer is not particularly illustrated, but is formed so as to extend on the same plane as each of the internal electrodes 4 and 5 in the ceramic body 3.
- the internal electrode printing film 11 and the step absorption printing film 12 described above are formed by ink jet printing using the ink according to the present invention, details of which will be described later.
- a plurality of ceramic green sheets 10 are laminated to obtain a green laminate.
- the green laminate is pressed, cut, and then fired as necessary.
- the ceramic body 3 incorporating the internal electrodes 4 and 5 shown in FIG. 1 is obtained.
- the external electrodes 6 and 7 at the end of the ceramic body 3 the multilayer ceramic capacitor 1 is completed.
- the inkjet ink according to the present invention includes functional particles having an average particle diameter of 50 to 1000 nm, rheology adjusting particles having an average particle diameter of 4 to 40 nm, and an organic vehicle, and has a shear rate of 1000 s ⁇ 1.
- the viscosity at a shear rate of 0.1 s ⁇ 1 is 1 to 50 mPa ⁇ s.
- the rheology adjusting particles having an average particle size of 4 to 40 nm have a very large specific surface area, and therefore, the interaction between particles works greatly.
- rheology adjusting particles are added to the ink, a three-dimensional network structure is effectively formed via functional particles having a particle diameter of 50 nm or more and rheology adjusting particles, and ink jet printing is performed under a high shear rate.
- the addition amount of the rheology adjustment particles is 3.0 to 42.4 parts by volume with respect to 100 parts by volume of the functional particles. preferable.
- the ink-jet ink according to the present invention satisfies all three characteristics, such as a viscosity characteristic capable of ink-jet printing, a sedimentation characteristic capable of stable printing, and a characteristic difficult to bleed after printing.
- a three-dimensional network structure through large-diameter particles and fine particles having a particle diameter of 50 nm or more is used.
- This three-dimensional network structure is characterized in that its formation and collapse occur reversibly depending on the magnitude of the shearing force.
- the smaller the particle size of the fine particles the larger the specific surface area, the greater the number of particles per total added volume and the smaller the inter-particle distance, thereby effectively forming a three-dimensional network structure.
- ⁇ increases due to the formation of a three-dimensional network structure via large-diameter particles and fine particles (that is, viscosity develops at the particle interface and space). Sedimentation is suppressed.
- ⁇ is lowered due to the collapse of the three-dimensional network structure, and inkjet printing becomes possible.
- the three-dimensional network structure is formed again and ⁇ becomes high, so that the effect of suppressing blurring of dots and printed figures is also exhibited.
- thixotropic agents can exhibit characteristics similar to the above.
- a thixotropic agent forms a three-dimensional network structure of a swelling resin (viscosity develops in space), so that the viscosity reduction due to the collapse of the three-dimensional network structure under high shear force is insufficient. Yes, not suitable for inkjet printing.
- the thixotropic expression is easy in a high polarity / high surface tension aqueous system as described in Patent Document 4, but is difficult in a low polarity / low surface tension organic solvent system. That is, for example, even if the design of the aqueous paste described in Patent Document 4 is applied to an organic solvent system, the necessary thixotropic properties are not exhibited.
- the functional particles are composed of, for example, a conductor, a resistor, a dielectric, a magnetic material, a phosphor, and the like, and are composed of all materials that provide an electromagnetic or optical function. It may be a particle composed of a mixture of plural kinds of materials or a mixture of particles composed of different materials. Regardless of the concentration of the functional particles in the ink, if the viscosity at the shear rate of 0.1 s ⁇ 1 is equal to or larger than ⁇ calculated by the above equation 1, a sufficient sedimentation suppressing effect and printing bleeding suppressing effect can be obtained. .
- ⁇ Rheology adjusting particles are defined only by particle size. That is, the material of the rheology adjusting particles is not particularly limited.
- the rheology adjusting particles are preferably composed of ceramic (oxide, nitride, boride, silicide, carbide).
- the materials of the organic solvent and binder constituting the organic vehicle there are no particular restrictions on the materials of the organic solvent and binder constituting the organic vehicle, and a mixture of a plurality of types of materials may be used.
- the organic solvent at least one selected from alcohols, esters, ketones and ethers can be suitably used.
- the binder at least one selected from cellulose-based, acrylic-based, and cyclic acetal-based binders can be suitably used.
- conductive particles made of metal or the like are used as functional particles.
- the functional particles are made of a relatively low melting point material such as metal and the rheology adjusting particles are made of ceramic, the rheology adjusting particles sufficiently suppress the necking with respect to the functional particles having an average particle diameter of 50 nm or more. An effect is exhibited and the thermal shrinkage start temperature of the internal electrode printing film 11 during firing can be increased. Thereby, the shrinkage
- the main component of the rheology adjusting particles is more preferably the same as the main component of the ceramic body 3.
- the conductive particles described above preferably contain at least one metal selected from the group consisting of Au, Pt, Ag, Ni, Cu, Al, and Fe, or at least one metal selected from this group. It is made of an alloy. These metals are suitable as materials for electrodes in ceramic electronic components such as the multilayer ceramic capacitor 1.
- ceramic particles are used as functional particles.
- the main component of the ceramic particles serving as the functional particles is the same as the main component of the ceramic layer 2, that is, the same as the main component of the ceramic particles contained in the ceramic green sheet 10, and the rheology adjusting particles are made of ceramic.
- the ink for forming the step absorption printing film 12 can be made more suitable.
- the ceramic green sheet 10 and The shrinkage mismatch during firing with the step absorbing print film 12 is further reduced. Therefore, it is possible to realize an inkjet ink that satisfies the heat shrinkage characteristics and can make structural defects less likely to occur in the obtained multilayer ceramic capacitor 1.
- the ink-jet ink according to the present invention is used to form both the internal electrode print film 11 that becomes the internal electrodes 4 and 5 and the step absorption print film 12 that becomes the step absorption layer in the multilayer ceramic capacitor 1.
- the ink-jet ink according to the present invention may be used to form only one of the internal electrode printing film 11 and the step absorption printing film 12.
- the inkjet ink according to the present invention is not limited to the multilayer ceramic capacitor 1, but may be other multilayer ceramic electronic components, or ceramic electronic components having no multilayer structure.
- the ink-jet ink according to the present invention may be used in fields other than electronic components.
- a typical inkjet system that can be implemented using the ink according to the present invention is a piezo inkjet system, but is not limited to this system.
- the ink-jet ink according to the present invention can be applied to any type of ink-jet printing as long as the ink-jet printing requires a low-viscosity ink.
- nickel powders having an average particle size (“average particle size” is “average particle size according to BET equivalent particle size”, the same applies hereinafter) as functional particles are 10 nm, 50 nm, 100 nm, 500 nm, 1000 nm and 2000 nm.
- barium titanate powder having an average particle diameter of 4 nm, 10 nm, 30 nm, 40 nm, and 60 nm was prepared as rheology adjusting particles.
- ⁇ Print blur evaluation> In order to evaluate the bleeding of the ink jet ink according to each sample obtained, 500 dots having an average diameter of 70 ⁇ m were printed on a ceramic green sheet using a piezo ink jet printer using these inks. The degree and the dot diameter were evaluated with NEXIV-VMR-6555 (Nikon). As a result, when the average roundness of dots / average dot diameter is less than 15%, “ ⁇ ” is displayed in the “Print blur” column of Table 1 and the average roundness / average dot diameter falls within 15-20%. In the “printing blur” column, “ ⁇ ” was displayed, and those that did not fall within 20% were displayed as “printing blur” in the “print blur” column.
- the roundness is a value calculated in accordance with “JIS B 0621-1984”. When the value is 0, it can be said that the dot is a perfect circle without blurring.
- a ceramic material containing barium titanate as a main component, an organic binder, an organic solvent, a plasticizer, and a dispersant were mixed at a predetermined ratio, and then wet dispersed using a ball mill to obtain a ceramic slurry.
- this ceramic slurry was molded using a doctor blade method on a PET (polyethylene terephthalate) film so that the thickness after drying was 6.0 ⁇ m, thereby obtaining a ceramic green sheet.
- the thickness after drying is set to 1. in a pattern in which the planar dimension of the chip-shaped ceramic body after cutting and firing obtained later is 2.0 mm ⁇ 1.2 mm.
- Ink jet ink according to each sample was printed by a piezo ink jet printer so as to be 0 ⁇ m, thereby forming a print film to be an internal electrode.
- the 200 ceramic green sheets on which the above-described internal electrode printed film was formed were peeled from the PET film, stacked, and then placed in a predetermined mold and pressed in a stacked state.
- the pressed laminated body block was cut into a predetermined size to obtain a chip-like raw laminated body to be a component body for each multilayer ceramic capacitor.
- this raw laminate was degreased in nitrogen at a temperature of 350 ° C. for 10 hours, and then an oxygen partial pressure of 10 ⁇ 6 to 10 ⁇ in an N 2 / H 2 / H 2 O mixed atmosphere. While maintaining the pressure at 7 MPa, firing was performed with a profile that was maintained at a temperature of 1200 ° C. for 2 hours.
- each ceramic body containing the internal electrodes which is the component body after the firing treatment, was observed and evaluated for the presence of structural defects such as delamination and cracks.
- structural defects such as delamination and cracks.
- ⁇ is displayed in the column of “structural defects” in Table 1
- X is displayed in the “structural defect” column.
- Samples 7 to 32 to which rheology adjusting particles were added Samples 7 to 11, 13 to 16, 18 to 20, and 23 to 25 had “0.1 s ⁇ 1 viscosity” as “viscosity calculated from Equation 1.
- the “average particle size for rheology adjustment” is 4 to 40 nm.
- the “settlement” is “ ⁇ ” or “ ⁇ ”.
- “Sedimentation” is “ ⁇ ”.
- the “print blur” was “x” in the samples 2 to 6 whose “functional particle average particle diameter” was 50 nm or more.
- the “average particle size for rheology adjustment” is required to be 40 nm or less, preferably 30 nm or less.
- the “structural defects” were “x” in the samples 1 to 5 whose “functional particle average particle diameter” was 1000 nm or less. This is presumed to be caused by a decrease in the shrinkage start temperature accompanying the reduction in the diameter of the functional particles.
- the “rheology adjusting particle average particle diameter” was 60 nm, which was a relatively large diameter, and the “functional particle average particle diameter” was 50 nm, which was a very small diameter. Only in the sample 28, the “structural defect” is “x”. In the other samples 7 to 27 and 29 to 32, the condition that the “average particle size for rheology adjustment” is smaller than the “average particle size for functional particles” is satisfied, and the “structural defect” is “ ⁇ ”.
- nickel powder having an average particle size of 500 nm as functional particles and barium titanate powder having an average particle size of 4 nm and 30 nm as rheology adjusting particles were prepared.
- Samples 33 to 38 are composed of functional particles: 35 parts by weight, rheology adjusting particles: 0.8-10.0 parts by weight, polymer dispersant: 5 parts by weight, and ethyl cellulose resin and dihydroterpineol acetate.
- Organic vehicle 50.0 to 56.2 parts by weight were mixed and treated with a pot mill to obtain an inkjet ink.
- the rheology adjusting particles are 3.0 to 42 with respect to 100 parts by volume of the functional particles.
- the composition corresponds to 4 parts by volume.
- the “rheology adjusting particle / functional particle volume ratio” was in the range of 3.0 / 100 to 42.4 / 100, and the “structural defect” was It became " ⁇ ".
- the “rheology adjusting particle / functional particle volume ratio” is in the range of at least 3.0 / 100 to 42.4 / 100, an excellent effect of suppressing structural defects can be obtained.
- the structural defect suppressing effect can be obtained, but the effective area as the internal electrode becomes too small, which is not preferable.
- Example 3 ⁇ Preparation of inkjet ink>
- ink jet inks were prepared in which the metal species constituting the conductive particles to be the functional particles were varied as shown in the column “Functional Particle Types” in Table 3.
- a method for producing an inkjet ink according to each sample shown in Table 3 will be described.
- Ink jet ink according to sample 40 has Cu powder having an average particle size of 500 nm as functional particles: 40 parts by weight, barium titanate powder having an average particle size of 10 nm as rheology adjusting particles: 4 parts by weight, polymer dispersion Agent: 5 parts by weight, and an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate: 51 parts by weight were mixed and treated with a pot mill.
- the inkjet ink according to Sample 41 is 44 parts by weight of Ag powder having an average particle diameter of 500 nm as functional particles, and 3.7 parts by weight of barium titanate powder having an average particle diameter of 10 nm as rheology adjusting particles.
- Dispersant 4.7 parts by weight and an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate: 46.6 parts by weight were mixed and treated with a pot mill.
- the inkjet ink according to the sample 42 is composed of 59 parts by weight of Au powder having an average particle diameter of 500 nm as functional particles, 2.7 parts by weight of barium titanate powder having an average particle diameter of 10 nm as particles for rheology adjustment, and a polymer. This was obtained by mixing 3.3 parts by weight of a dispersant and 35 parts by weight of an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate and treating with a pot mill.
- the inkjet ink according to Sample 43 is composed of 62 parts by weight of Pt powder having an average particle diameter of 500 nm as functional particles, 2.6 parts by weight of barium titanate powder having an average particle diameter of 10 nm as particles for rheology adjustment, and a polymer. This was obtained by mixing 3.2 parts by weight of a dispersant and 32 parts by weight of an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate and treating with a pot mill.
- the inkjet ink according to Sample 44 is composed of Al powder having an average particle diameter of 500 nm as functional particles: 17 parts by weight, Barium titanate powder having an average particle diameter of 10 nm as rheology adjusting particles: 5.5 parts by weight, polymer It was obtained by mixing 6.9 parts by weight of a dispersant and 69.3 parts by weight of an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate and treating with a pot mill.
- Ink-jet ink according to Sample 45 includes: Fe powder having an average particle diameter of 500 nm as functional particles: 37 parts by weight; Barium titanate powder having an average particle diameter of 10 nm as rheology adjusting particles: 4.2 parts by weight; polymer It was obtained by mixing a system dispersant: 5.2 parts by weight and an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate: 52.4 parts by weight and treating with a pot mill.
- the “rheology adjusting particle / functional particle volume ratio” has a composition corresponding to 11/100.
- Ni powder was set to 8.9 as described above. Furthermore, Cu powder is set to 8.9, Ag powder is set to 10.5, Au powder is set to 19.3, Pt powder is set to 21.5, Al powder is set to 2.7, and Fe powder is set. Was 7.9.
- the “rheology adjusting particle / functional particle volume ratio” is at least in the range of 3.0 / 100 to 42.4 / 100. Therefore, it can be judged that an excellent effect of suppressing structural defects is obtained.
- Ink jet ink according to Sample 46 is nickel powder having an average particle size of 300 nm as functional particles: 25 parts by weight, barium titanate powder having an average particle size of 10 nm as rheology adjusting particles: 4 parts by weight, polymer dispersion Agent: 5 parts by weight, and an organic vehicle composed of ethyl cellulose resin and dihydroterpineol acetate: 66 parts by weight were mixed and treated with a pot mill.
- the ink for inkjet recording according to Sample 47 has 25 parts by weight of nickel powder having an average particle size of 300 nm as functional particles, 4 parts by weight of barium titanate powder having an average particle size of 10 nm as rheology adjusting particles, and a polymer dispersion.
- Agent 5 parts by weight
- an organic vehicle composed of acrylic resin and dihydroterpineol acetate 66 parts by weight were mixed and treated with a pot mill.
- the acrylic resin has a monomer unit of ethyl methacrylate / t-butyl methacrylate / acrylic acid.
- Ink jet ink according to sample 48 is nickel powder having an average particle size of 300 nm as functional particles: 25 parts by weight, barium titanate powder having an average particle size of 10 nm as rheology adjusting particles: 4 parts by weight, polymer dispersion Agent: 5 parts by weight, and an organic vehicle composed of polyvinyl butyral resin (cyclic acetal-based resin) and dihydroterpineol acetate: 66 parts by weight were mixed and treated with a pot mill.
- the “rheology adjusting particle / functional particle volume ratio” has a composition corresponding to 11/100.
- the “rheology adjusting particle / functional particle volume ratio” was 11/100, and the “structural defect” was “ ⁇ ”.
- Example 5 ⁇ Preparation of inkjet ink> As shown in Table 5, barium titanate powder having an average particle size of 10 nm, 50 nm, 100 nm, 250 nm, 400 nm and 500 nm was prepared as functional particles, and barium titanate powder having an average particle size of 10 nm was prepared as rheology adjusting particles. .
- a ceramic material mainly composed of barium titanate, an organic binder, an organic solvent, a plasticizer, and a dispersing agent are mixed at a predetermined ratio, and then wet dispersion treatment is performed using a high-pressure homogenizer similar to that used for preparing ink jet ink. A ceramic slurry was obtained.
- the powder obtained by drying and degreasing the ceramic slurry had a BET equivalent diameter of about 250 nm.
- this ceramic slurry was molded using a doctor blade method on a PET (polyethylene terephthalate) film so that the thickness after drying was 6.0 ⁇ m, thereby obtaining a ceramic green sheet.
- a physical thickness after drying is 1 with a pattern in which the planar dimensions of a chip-shaped ceramic body after cutting and firing obtained later are 2.0 mm ⁇ 1.2 mm.
- the Ni paste was printed by a screen printer so as to be 0.0 ⁇ m, and a Ni coating film to be an internal electrode was formed.
- the ink for inkjet recording according to each sample is printed on a ceramic green sheet by a piezo inkjet printing machine so that the physical thickness after drying is 1.0 ⁇ m, and the step absorption is performed. Inkjet printing film was formed.
- the 200 ceramic green sheets on which the Ni coating film for internal electrodes and the ink jet printing film for level difference absorption are formed are peeled from the PET film, stacked, and then stacked in a predetermined mold. And pressed.
- the pressed laminated body block was cut into a predetermined size to obtain a chip-like raw laminated body to be a component main body of each multilayer ceramic capacitor.
- this raw laminate was degreased in nitrogen at a temperature of 350 ° C. for 10 hours, and then an oxygen partial pressure of 10 ⁇ 6 to 10 ⁇ in an N 2 / H 2 / H 2 O mixed atmosphere. While maintaining the pressure at 7 MPa, firing was performed with a profile that was maintained at a temperature of 1200 ° C. for 2 hours.
- the “0.1 s ⁇ 1 viscosity” was calculated from the formula 1.
- the “viscosity” or higher and the “average particle size for rheology adjustment” is 10 nm.
- “sedimentability” and “print blur” are “ ⁇ ”. From the above results and the results of Experimental Example 1, it was found that the functional particles were ceramic (barium titanate).
- “functional particle average particle size” is 50 nm or more
- “0.1 s ⁇ 1 viscosity” is “viscosity calculated from formula 1” or more
- “rheology adjusting particle average particle size” is 40 nm or less. If so, it can be said that a sufficient sedimentation suppressing effect and printing bleeding suppressing effect can be obtained.
- “Functional particle diameter / ceramic green sheet particle diameter” in Table 5 represents the ratio [%] of “functional particle average particle diameter” to the average particle diameter of the ceramic main component particles contained in the ceramic green sheet. It is a thing. Here, the average particle diameter of the ceramic main component particles contained in the ceramic green sheet was 250 nm.
- samples 51 to 53 and 57 to 59 in which “functional particle size / ceramic green sheet particle size” is in the range of 48 to 152% have “structural defects” of “ ⁇ ”. It became. Therefore, when forming a step-absorbing ceramic printed film in a multilayer ceramic electronic component, the average particle size of the ceramic powder as the functional particles contained in the step-absorbing printed film is equal to the ceramic of the multilayer ceramic electronic component. By making it within the range of 48 to 152% of the average particle size of the ceramic main component particles contained in the layer before firing, shrinkage mismatch during firing can be suppressed, and a multilayer ceramic electronic component free of structural defects can be obtained. I can say that.
Abstract
Description
(ただし、νsは粒子の沈降速度、Dpは粒子直径、ρpは粒子比重、ρfは分散媒比重、gは重力加速度、およびηは分散媒粘度である。)
ストークス式から、粒径50nm以上の粒子が分散した有機系インクで問題となる粒子沈降を抑えるには、分散媒粘度ηを上げることが効果的であることがわかる。
式1:η=(D)2×ρ/104/2+80
〔ただし、ηはせん断速度0.1s-1での粘度(mPa・s)、Dは機能性粒子の平均粒径(nm)、ρは機能性粒子の比重〕
によって算出される粘度η以上であることを特徴としている。
式1:η=(D)2×ρ/104/2+80
〔ただし、ηはせん断速度0.1s-1での粘度(mPa・s)、Dは機能性粒子の平均粒径(nm)、ρは機能性粒子の比重〕
によって算出される粘度η以上であることを特徴としている。
νs={Dp2(ρp-ρf)g}/18η
(ただし、νsは粒子の沈降速度、Dpは粒子直径、ρpは粒子比重、ρfは分散媒比重、gは重力加速度、およびηは分散媒粘度である。)
について、再び考察する。
<インクジェット用インクの作製>
表1に示すように、機能性粒子として平均粒径(「平均粒径」は「BET換算粒径による平均粒径」。以下同様。)10nm、50nm、100nm、500nm、1000nmおよび2000nmのニッケル粉末と、レオロジー調整用粒子として平均粒径4nm、10nm、30nm、40nmおよび60nmのチタン酸バリウム粉末とを用意した。
上述のようにして得られた試料1~32に係るインクジェット用インクについて、アントンパール社製コーン型レオメーター(MCR300)を用い、ズリ速度1000s-1における3秒後の粘度、およびズリ速度0.1s-1における5秒後の粘度を測定した。その結果が、それぞれ、表1の「1000s-1粘度」および「0.1s-1粘度」の各欄に示されている。
得られた各試料に係るインクジェット用インクの沈降性を評価するため、これらインクを用い、ピエゾインクジェット印刷機にて4時間連続印刷した。その結果、形成された印刷膜の厚みが、狙い厚み1.0μm±5%以内に収まったものについては、表1の「沈降性」の欄に「◎」と表示し、1.0μm±5%の範囲を超えるが、1.0μm±10%以内に収まったものについては、「沈降性」の欄に「○」と表示し、1.0μm±10%の範囲を超えるが、1.0μm±20%以内に収まったものについては、「沈降性」の欄に「△」と表示し、1.0μm±20%の範囲を超えたもの、または途中でノズル詰まりが起きたものについては、「沈降性」の欄に「×」と表示した。
得られた各試料に係るインクジェット用インクのにじみを評価するため、これらインクを用い、ピエゾインクジェット印刷機にて、平均直径70μmのドットをセラミックグリーンシート上に500個印刷し、各ドットの真円度とドット直径とをNEXIV-VMR-6555(Nikon製)で評価した。その結果、ドットの平均真円度/平均ドット直径が、15%未満に収まったものについては、表1の「印刷にじみ」の欄に「◎」と表示し、15~20%に収まったものについては、「印刷にじみ」の欄に「○」と表示し、20%以内に収まらなかったものについては、「印刷にじみ」の欄に「×」と表示した。
以下のように、各試料に係るインクジェット用インクを用いながら、積層セラミックコンデンサのためのセラミック素体を作製し、得られたセラミック素体について構造欠陥の有無を評価した。
<インクジェット用インクの作製>
実験例1において作製した試料4に係るインクジェット用インクを用意した。
実験例1の場合と同様の方法にて、表2の「1000s-1粘度」および「0.1s-1粘度」を求めるとともに、「式1から算出した粘度」を求めた。
実験例1の場合と同様の方法にて、表2の「沈降性」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表2の「印刷にじみ」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表2の「構造欠陥」を評価し、同様の方法で表示した。
<インクジェット用インクの作製>
実験例3では、機能性粒子となる導電性粒子を構成する金属種を、表3の「機能性粒子種」の欄に示すように異ならせたインクジェット用インクを作製した。以下、表3に示した各試料に係るインクジェット用インクの作製方法について説明する。
実験例1の場合と同様の方法にて、表3の「1000s-1粘度」および「0.1s-1粘度」を求めるとともに、「式1から算出した粘度」を求めた。
実験例1の場合と同様の方法にて、表3の「沈降性」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表3の「印刷にじみ」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表3の「構造欠陥」を評価し、同様の方法で表示した。
<インクジェット用インクの作製>
実験例4では、有機ビヒクルに含まれるバインダ樹脂種を、表4の「バインダ種」の欄に示すように異ならせたインクジェット用インクを作製した。以下、表4に示した各試料に係るインクジェット用インクの作製方法について説明する。
実験例1の場合と同様の方法にて、表4の「1000s-1粘度」および「0.1s-1粘度」を求めるとともに、「式1から算出した粘度」を求めた。
実験例1の場合と同様の方法にて、表4の「沈降性」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表4の「印刷にじみ」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表4の「構造欠陥」を評価し、同様の方法で表示した。
<インクジェット用インクの作製>
表5に示すように、機能性粒子として平均粒径10nm、50nm、100nm、250nm、400nmおよび500nmのチタン酸バリウム粉末と、レオロジー調整用粒子として平均粒径10nmのチタン酸バリウム粉末とを用意した。
実験例1の場合と同様の方法にて、表5の「1000s-1粘度」および「0.1s-1粘度」を求めるとともに、「式1から算出した粘度」を求めた。
実験例1の場合と同様の方法にて、表5の「沈降性」を評価し、同様の方法で表示した。
実験例1の場合と同様の方法にて、表5の「印刷にじみ」を評価し、同様の方法で表示した。
表5の「構造欠陥」を評価するにあたって、実験例1の場合と同様、試料として、積層セラミックコンデンサのためのセラミック素体を作製したが、その作製方法が一部異なる。
上記結果および実験例1の結果から、機能性粒子がセラミック(チタン酸バリウム)である場合であっても、「機能性粒子平均粒径」が50nm以上であり、「0.1s-1粘度」が「式1から算出した粘度」以上でありかつ「レオロジー調整用粒子平均粒径」が40nm以下であれば、十分な沈降抑制効果および印刷にじみ抑制効果が得られると言える。
2 セラミック層
3 セラミック素体
4,5 内部電極
10 セラミックグリーンシート
11 内部電極用印刷膜
12 段差吸収用印刷膜
Claims (15)
- BET換算粒径による平均粒径50~1000nmの機能性粒子と、BET換算粒径による平均粒径4~40nmのレオロジー調整用粒子と、有機ビヒクルとを含み、
せん断速度1000s-1での粘度が1~50mPa・sであり、かつ、
せん断速度0.1s-1での粘度が、
式:η=(D)2×ρ/104/2+80
〔ただし、ηはせん断速度0.1s-1での粘度(mPa・s)、Dは機能性粒子のBET換算粒径による平均粒径(nm)、ρは機能性粒子の比重〕
によって算出される粘度η以上である、
インクジェット用インク。 - 前記レオロジー調整用粒子はセラミックからなる、請求項1に記載のインクジェット用インク。
- 前記レオロジー調整用粒子はペロブスカイト構造の酸化物からなる、請求項2に記載のインクジェット用インク。
- 前記有機ビヒクルは、セルロース系樹脂、アクリル系樹脂、および環状アセタール系樹脂から選ばれる少なくとも1種の樹脂と有機溶剤との混合物である、請求項1ないし3のいずれかに記載のインクジェット用インク。
- 当該インクジェット用インク中の前記機能性粒子の体積を100体積部としたとき、前記レオロジー調整用粒子の添加量が3.0~42.4体積部である、請求項1ないし4のいずれかに記載のインクジェット用インク。
- 電極と、前記電極を保持するセラミック素体とを備える、セラミック電子部品において、前記電極となる印刷膜を形成するために用いられるものであって、前記機能性粒子は導電性粒子である、請求項1ないし5のいずれかに記載のインクジェット用インク。
- 前記導電性粒子は、Au、Pt、Ag、Ni、Cu、Al、およびFeからなる群より選ばれる少なくとも1種の金属、または前記群より選ばれる少なくとも1種の金属を含有する合金からなるものである、請求項6に記載のインクジェット用インク。
- 前記レオロジー調整用粒子の主成分は、前記セラミック素体の主成分と同じである、請求項6または7に記載のセラミック電子部品。
- 積層された複数のセラミック層からなる積層構造を有するセラミック素体と、前記セラミック層間の界面に沿って形成された内部電極と、前記セラミック層間の界面における前記内部電極が形成されない領域に形成された、前記内部電極の厚みによる段差を吸収するための段差吸収層とを備える、セラミック電子部品において、前記段差吸収層となる印刷膜を形成するために用いられるものであって、前記機能性粒子はセラミック粒子である、請求項1ないし5のいずれかに記載のインクジェット用インク。
- 前記機能性粒子となる前記セラミック粒子の主成分は、前記セラミック層の主成分と同じである、請求項9に記載のインクジェット用インク。
- 前記機能性粒子のBET換算粒径による平均粒径は、前記セラミック層に含まれるセラミック主成分粒子の焼成前のBET換算粒径による平均粒径に対して、48~152%の範囲内である、請求項10に記載のインクジェット用インク。
- インクジェット装置によって、請求項1ないし11のいずれかに記載のインクジェット用インクからなる印刷膜を形成する、印刷方法。
- 請求項6ないし8のいずれかに記載のインクジェット用インクを用いて形成された印刷膜を焼成してなる電極と、前記電極を保持するセラミック素体とを備える、セラミック電子部品。
- 積層された複数のセラミック層からなる積層構造を有するセラミック素体と、前記セラミック層間の界面に沿って形成された内部電極と、前記セラミック層間の界面における前記内部電極が形成されない領域に形成された、前記内部電極の厚みによる段差を吸収するための段差吸収層とを備え、前記段差吸収層は、請求項9ないし11のいずれかに記載のインクジェット用インクを用いて形成された印刷膜を焼成してなるものである、セラミック電子部品。
- 積層された複数のセラミック層からなる積層構造を有するセラミック素体と、前記セラミック層間の界面に沿って形成された内部電極と、前記セラミック層間の界面における前記内部電極が形成されない領域に形成された、前記内部電極の厚みによる段差を吸収するための段差吸収層とを備え、前記内部電極は、請求項6ないし8のいずれかに記載のインクジェット用インクを用いて形成された印刷膜を焼成してなるものであり、前記段差吸収層は、請求項9ないし11のいずれかに記載のインクジェット用インクを用いて形成された印刷膜を焼成してなるものである、セラミック電子部品。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014515573A JP5920460B2 (ja) | 2012-05-18 | 2013-05-07 | インクジェット用インク、印刷方法およびセラミック電子部品の製造方法 |
KR1020147032202A KR101765706B1 (ko) | 2012-05-18 | 2013-05-07 | 잉크젯용 잉크, 인쇄방법 및 세라믹 전자부품 |
CN201380025840.7A CN104302713B (zh) | 2012-05-18 | 2013-05-07 | 喷墨用墨水、印刷方法及陶瓷电子部件的制造方法 |
US14/543,994 US9738806B2 (en) | 2012-05-18 | 2014-11-18 | Inkjet ink, printing method, and ceramic electronic component |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-114173 | 2012-05-18 | ||
JP2012114173 | 2012-05-18 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/543,994 Continuation US9738806B2 (en) | 2012-05-18 | 2014-11-18 | Inkjet ink, printing method, and ceramic electronic component |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013172213A1 true WO2013172213A1 (ja) | 2013-11-21 |
Family
ID=49583621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/062810 WO2013172213A1 (ja) | 2012-05-18 | 2013-05-07 | インクジェット用インク、印刷方法およびセラミック電子部品 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9738806B2 (ja) |
JP (1) | JP5920460B2 (ja) |
KR (1) | KR101765706B1 (ja) |
CN (1) | CN104302713B (ja) |
TW (1) | TWI580741B (ja) |
WO (1) | WO2013172213A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103965692A (zh) * | 2014-04-24 | 2014-08-06 | 佛山远牧数码科技有限公司 | 一种用于陶瓷喷墨的紫外光固化油墨及其制备方法 |
JP2015216319A (ja) * | 2014-05-13 | 2015-12-03 | 株式会社村田製作所 | セラミック電子部品の製造方法 |
WO2019022195A1 (ja) * | 2017-07-28 | 2019-01-31 | 住友化学株式会社 | インク組成物、フィルム及びディスプレイ |
JP2020155354A (ja) * | 2019-03-22 | 2020-09-24 | 株式会社村田製作所 | 導電性ペーストおよびセラミック電子部品 |
JP2021024992A (ja) * | 2019-08-08 | 2021-02-22 | 株式会社村田製作所 | 機能材料インク |
WO2021172007A1 (ja) * | 2020-02-28 | 2021-09-02 | コニカミノルタ株式会社 | インクジェットインク及び画像形成方法 |
US11120942B2 (en) | 2016-07-21 | 2021-09-14 | Tdk Corporation | Process for production of multilayer electronic component |
JP2022508399A (ja) * | 2018-12-20 | 2022-01-19 | エッカルト ゲゼルシャフト ミット ベシュレンクテル ハフツング | 導電性インクジェット印刷インク組成物 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6312633B2 (ja) * | 2014-08-01 | 2018-04-18 | 太陽誘電株式会社 | 積層セラミックコンデンサ |
CN107057462A (zh) * | 2017-06-05 | 2017-08-18 | 安徽省亚欧陶瓷有限责任公司 | 一种用于瓷砖喷墨印花的新型陶瓷墨水及其制备方法 |
JP7215047B2 (ja) * | 2018-09-28 | 2023-01-31 | 住友金属鉱山株式会社 | 導電性ペースト、電子部品、及び積層セラミックコンデンサ |
KR102426209B1 (ko) * | 2018-10-10 | 2022-07-28 | 삼성전기주식회사 | 적층 세라믹 전자부품 |
KR20200040429A (ko) | 2018-10-10 | 2020-04-20 | 삼성전기주식회사 | 적층 세라믹 전자부품 |
CN109616321B (zh) * | 2018-12-18 | 2021-04-06 | 大连海外华昇电子科技有限公司 | 一种基于凹版涂布印刷的多层陶瓷电容器用镍浆及应用 |
KR20220098620A (ko) | 2021-01-04 | 2022-07-12 | 삼성전기주식회사 | 적층형 전자 부품 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09219339A (ja) * | 1996-02-09 | 1997-08-19 | Murata Mfg Co Ltd | 積層型セラミック電子部品の製造方法および製造装置 |
JP2000327964A (ja) * | 1999-05-18 | 2000-11-28 | Matsushita Electric Ind Co Ltd | 電子部品用電極インキおよびその製造方法、並びにインキジェット装置、インキジェット洗浄液および電子部品の製造方法 |
JP2002100543A (ja) * | 2000-09-25 | 2002-04-05 | Uht Corp | セラミック積層体の製造装置 |
WO2002090117A1 (fr) * | 2001-05-09 | 2002-11-14 | Matsushita Electric Industrial Co., Ltd. | Dispositif a jet d'encre, encre pour dispositif a jet d'encre et procede permettant de produire un composant electronique au moyen de ce dispositif et de cette encre |
JP2005109176A (ja) * | 2003-09-30 | 2005-04-21 | Jsr Corp | 積層キャパシタの製造方法 |
JP2006028320A (ja) * | 2004-07-15 | 2006-02-02 | Matsushita Electric Ind Co Ltd | 水系電極インクおよびその製造方法 |
WO2006041030A1 (ja) * | 2004-10-08 | 2006-04-20 | Mitsui Mining & Smelting Co., Ltd. | 導電性インク |
JP2007123198A (ja) * | 2005-10-31 | 2007-05-17 | Tdk Corp | 導電性ペーストおよび積層型電子部品の製造方法 |
JP2007119683A (ja) * | 2005-10-31 | 2007-05-17 | Seiko Epson Corp | インク組成物及び該インク組成物を用いて印刷を行う記録方法並びに該記録方法によって印刷が行われた記録物 |
JP2009138030A (ja) * | 2007-12-03 | 2009-06-25 | Dic Corp | ニッケルインキの製造方法、ニッケルインキパターンの形成方法、及び積層セラミックコンデンサの製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5008216B2 (ja) | 2000-10-13 | 2012-08-22 | 株式会社アルバック | インクジェット用インクの製法 |
US7351386B2 (en) | 2002-04-04 | 2008-04-01 | Steris Inc | Cartridge holder for automated reprocessor |
US7683107B2 (en) | 2004-02-09 | 2010-03-23 | E.I. Du Pont De Nemours And Company | Ink jet printable thick film compositions and processes |
US20080026136A1 (en) * | 2006-07-24 | 2008-01-31 | Skamser Daniel J | Process for manufacture of ceramic capacitors using ink jet printing |
JP2009283627A (ja) * | 2008-05-21 | 2009-12-03 | Toyama Prefecture | セラミック電子部品とその製造方法 |
JP4968411B2 (ja) * | 2009-03-27 | 2012-07-04 | 株式会社村田製作所 | 積層セラミック電子部品の製造方法 |
KR20120064963A (ko) * | 2010-12-10 | 2012-06-20 | 삼성전기주식회사 | 내부전극용 도전성 페이스트 조성물, 이의 제조방법 및 이를 이용한 적층 세라믹 전자부품 |
KR101275426B1 (ko) * | 2010-12-24 | 2013-06-14 | 삼성전기주식회사 | 내부전극용 도전성 페이스트 조성물, 이를 포함하는 적층 세라믹 커패시터 및 이의 제조방법 |
-
2013
- 2013-05-07 CN CN201380025840.7A patent/CN104302713B/zh active Active
- 2013-05-07 WO PCT/JP2013/062810 patent/WO2013172213A1/ja active Application Filing
- 2013-05-07 JP JP2014515573A patent/JP5920460B2/ja active Active
- 2013-05-07 KR KR1020147032202A patent/KR101765706B1/ko active IP Right Grant
- 2013-05-14 TW TW102117081A patent/TWI580741B/zh active
-
2014
- 2014-11-18 US US14/543,994 patent/US9738806B2/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09219339A (ja) * | 1996-02-09 | 1997-08-19 | Murata Mfg Co Ltd | 積層型セラミック電子部品の製造方法および製造装置 |
JP2000327964A (ja) * | 1999-05-18 | 2000-11-28 | Matsushita Electric Ind Co Ltd | 電子部品用電極インキおよびその製造方法、並びにインキジェット装置、インキジェット洗浄液および電子部品の製造方法 |
JP2002100543A (ja) * | 2000-09-25 | 2002-04-05 | Uht Corp | セラミック積層体の製造装置 |
WO2002090117A1 (fr) * | 2001-05-09 | 2002-11-14 | Matsushita Electric Industrial Co., Ltd. | Dispositif a jet d'encre, encre pour dispositif a jet d'encre et procede permettant de produire un composant electronique au moyen de ce dispositif et de cette encre |
JP2005109176A (ja) * | 2003-09-30 | 2005-04-21 | Jsr Corp | 積層キャパシタの製造方法 |
JP2006028320A (ja) * | 2004-07-15 | 2006-02-02 | Matsushita Electric Ind Co Ltd | 水系電極インクおよびその製造方法 |
WO2006041030A1 (ja) * | 2004-10-08 | 2006-04-20 | Mitsui Mining & Smelting Co., Ltd. | 導電性インク |
JP2007123198A (ja) * | 2005-10-31 | 2007-05-17 | Tdk Corp | 導電性ペーストおよび積層型電子部品の製造方法 |
JP2007119683A (ja) * | 2005-10-31 | 2007-05-17 | Seiko Epson Corp | インク組成物及び該インク組成物を用いて印刷を行う記録方法並びに該記録方法によって印刷が行われた記録物 |
JP2009138030A (ja) * | 2007-12-03 | 2009-06-25 | Dic Corp | ニッケルインキの製造方法、ニッケルインキパターンの形成方法、及び積層セラミックコンデンサの製造方法 |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103965692A (zh) * | 2014-04-24 | 2014-08-06 | 佛山远牧数码科技有限公司 | 一种用于陶瓷喷墨的紫外光固化油墨及其制备方法 |
JP2015216319A (ja) * | 2014-05-13 | 2015-12-03 | 株式会社村田製作所 | セラミック電子部品の製造方法 |
US11120942B2 (en) | 2016-07-21 | 2021-09-14 | Tdk Corporation | Process for production of multilayer electronic component |
WO2019022195A1 (ja) * | 2017-07-28 | 2019-01-31 | 住友化学株式会社 | インク組成物、フィルム及びディスプレイ |
JP6506488B1 (ja) * | 2017-07-28 | 2019-04-24 | 住友化学株式会社 | インク組成物、フィルム及びディスプレイ |
US11584862B2 (en) | 2017-07-28 | 2023-02-21 | Sumitomo Chemical Company, Limited | Ink composition, film, and display |
JP7013622B2 (ja) | 2018-12-20 | 2022-01-31 | エッカルト ゲゼルシャフト ミット ベシュレンクテル ハフツング | 導電性インクジェット印刷インク組成物 |
JP2022508399A (ja) * | 2018-12-20 | 2022-01-19 | エッカルト ゲゼルシャフト ミット ベシュレンクテル ハフツング | 導電性インクジェット印刷インク組成物 |
JP7211186B2 (ja) | 2019-03-22 | 2023-01-24 | 株式会社村田製作所 | 導電性ペーストおよびセラミック電子部品 |
JP2020155354A (ja) * | 2019-03-22 | 2020-09-24 | 株式会社村田製作所 | 導電性ペーストおよびセラミック電子部品 |
JP2021024992A (ja) * | 2019-08-08 | 2021-02-22 | 株式会社村田製作所 | 機能材料インク |
JP7400256B2 (ja) | 2019-08-08 | 2023-12-19 | 株式会社村田製作所 | 機能材料インク |
WO2021172007A1 (ja) * | 2020-02-28 | 2021-09-02 | コニカミノルタ株式会社 | インクジェットインク及び画像形成方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20150005975A (ko) | 2015-01-15 |
CN104302713B (zh) | 2016-09-21 |
US20150070818A1 (en) | 2015-03-12 |
TWI580741B (zh) | 2017-05-01 |
TW201404838A (zh) | 2014-02-01 |
JP5920460B2 (ja) | 2016-05-18 |
JPWO2013172213A1 (ja) | 2016-01-12 |
KR101765706B1 (ko) | 2017-08-07 |
US9738806B2 (en) | 2017-08-22 |
CN104302713A (zh) | 2015-01-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5920460B2 (ja) | インクジェット用インク、印刷方法およびセラミック電子部品の製造方法 | |
JP5569747B2 (ja) | 積層セラミックコンデンサ内部電極に用いられるグラビア印刷用導電性ペースト | |
KR101598945B1 (ko) | 도전성 페이스트, 적층 세라믹 전자부품, 및 상기 적층 세라믹 전자부품의 제조방법 | |
CN112106149B (zh) | 导电性浆料、电子部件以及叠层陶瓷电容器 | |
KR102092990B1 (ko) | 도전성 페이스트 조성물 | |
JP7420076B2 (ja) | 導電性ペースト、電子部品、及び積層セラミックコンデンサ | |
JP2007214452A (ja) | 剥離層用ペースト及び積層型電子部品の製造方法 | |
WO2016017463A1 (ja) | 積層セラミックコンデンサ内部電極用ペースト、及び積層セラミックコンデンサ | |
JP4403920B2 (ja) | 剥離層用ペーストの製造方法及び積層型電子部品の製造方法 | |
WO2004067475A1 (ja) | グリーンシート用塗料とその製造方法、グリーンシートとその製造方法、及び電子部品の製造方法 | |
JP5018154B2 (ja) | 内部電極形成ペースト、積層型セラミック型電子部品、およびその製造方法 | |
JP2006077233A (ja) | 剥離層用ペースト及び積層型電子部品の製造方法 | |
CN113168930B (zh) | 导电性糊剂 | |
CN111902882B (zh) | 导电性浆料、电子部件以及叠层陶瓷电容器 | |
JP2009283627A (ja) | セラミック電子部品とその製造方法 | |
JP4967223B2 (ja) | 水系電極インクおよびその製造方法 | |
JP4640028B2 (ja) | 剥離層用ペースト及び積層型電子部品の製造方法 | |
JP4601438B2 (ja) | グリーンシートの製造方法 | |
JP7400256B2 (ja) | 機能材料インク | |
JP3756885B2 (ja) | 厚膜グリーンシート用塗料、厚膜グリーンシート用塗料の製造方法、厚膜グリーンシートの製造方法、厚膜グリーンシートおよび電子部品の製造方法 | |
JP2004080048A (ja) | 電子部品 | |
JP4706743B2 (ja) | 積層型電子部品の製造方法 | |
JP2009155142A (ja) | セラミックスラリーの製造方法 | |
KR100881260B1 (ko) | 후막 그린 시트용 도료, 그 제조 방법 및 그 도료를 이용한전자 부품의 제조 방법 | |
JPWO2020137329A1 (ja) | 銀ペースト |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13790548 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014515573 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20147032202 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13790548 Country of ref document: EP Kind code of ref document: A1 |