Abstract: The present invention relates to a non-aqueous conductive nanoink composition including 20 to 85 parts by weight of metal nanoparticles which is chosen from silver, copper, nickel, platinum, palladium, and gold; 0.5 to 10 parts by weight of a polymer having an anhydride group; 15 to 80 parts by weight of a non-aqueous organic solvent. The non-aqueous conductive nanoink composition of the present invention prevents cracks during the drying process, increases the adhesion between wiring and substrate, and allows forming conductive wirings and films without cracks and delamination on the substrate such as polymer including polyimide and glass or silicon wafer.

Abstract: The present invention relates to a multi-layer ceramic capacitor printed simultaneously with internal electrode and external electrode by employing an inkjet printing. A method for manufacturing the multi-layer ceramic capacitor comprising first external electrode, dielectric, internal electrode and second external electrode prints simultaneously the first external electrode; the internal electrode which is connected with the first external electrode and formed at an invaginated portion of the dielectric invaginated to allow one side to be opened at one portion; and the second external electrode which is formed integrally with the internal electrode by employing an inkjet printing. According to the present invention, a method for manufacturing the multi-layer ceramic capacitor resolves contact problems by printing integrally the internal electrode and the external electrode and reduces the manufacturing process.

Abstract: Disclosed are a printed circuit board and a manufacturing method thereof. The printed circuit board having a circuit pattern formed therein includes a substrate having a groove formed therein, the groove corresponding to the circuit pattern; a first circuit pattern formed inside the groove; and a second circuit pattern formed on the first circuit pattern, the second circuit pattern filling up the groove.

Abstract: The present invention relates to a multi-layer ceramic capacitor printed simultaneously with internal electrode and external electrode by employing an inkjet printing. A method for manufacturing the multi-layer ceramic capacitor comprising first external electrode, dielectric, internal electrode and second external electrode prints simultaneously the first external electrode; the internal electrode which is connected with the first external electrode and formed at an invaginated portion of the dielectric invaginated to allow one side to be opened at one portion; and the second external electrode which is formed integrally with the internal electrode by employing an inkjet printing. According to the present invention, a method for manufacturing the multi-layer ceramic capacitor resolves contact problems by printing integrally the internal electrode and the external electrode and reduces the manufacturing process.

Abstract: A method of producing metal nanoparticles in a high yield rate and uniform shape and size, which is thus suitable for mass production. In addition, metal nanoparticles are provided that have superior dispersion stability when re-dispersed in various organic solvents, which thus suitable for use as a conductive ink having high conductivity. The method of producing nanoparticles includes mixing a metal precursor with a copper compound to a hydrocarbon based solvent, mixing an amine-based compound to the mixed solution of the metal precursor with copper compound and hydrocarbon based solvent, and mixing a compound including one or more atoms having at least one lone pair, selected from a group consisting of nitrogen, oxygen, sulfur and phosphorous to the mixed solution of the amine-based compound, metal precursor with a copper compound and hydrocarbon based solvent.

Abstract: A method of producing an array type multi-layer ceramic capacitor is disclosed, comprising: forming dielectric films, forming dielectric sheets on which internal electrodes and interelectrode dielectrics formed on the same plane as the internal electrodes are printed simultaneously by spraying ink intended for internal electrodes and ink intended for dielectrics onto the dielectric film via a plurality of inkjet printer heads, stacking and compressing the dielectric sheets, cutting the stacked dielectric sheet to include a plurality of internal electrodes on the same plane as the dielectric sheet, and sintering the cut dielectric sheets. The array type multi-layer ceramic capacitor according to the invention can solve the problem of interlayer gaps by printing the dielectrics and internal electrodes simultaneously, and can solve the contact problem by printing the internal electrode and the external electrode as a single body.

Abstract: A method of producing metal nanoparticles in a high yield rate and uniform shape and size, which is thus suitable for mass production. In addition, metal nanoparticles are provided that have superior dispersion stability when re-dispersed in various organic solvents, which thus suitable for use as a conductive ink having high conductivity. The method of producing nanoparticles includes mixing a metal precursor with a copper compound to a hydrocarbon based solvent, mixing an amine-based compound to the mixed solution of the metal precursor with copper compound and hydrocarbon based solvent, and mixing a compound including one or more atoms having at least one lone pair, selected from a group consisting of nitrogen, oxygen, sulfur and phosphorous to the mixed solution of the amine-based compound, metal precursor with a copper compound and hydrocarbon based solvent.

Abstract: The present invention relates to a method for producing metal nanoparticles and metal nanoparticles produced thereby, in particular, to a method for producing metal nanoparticles used for inkjet that comprises, preparing metal nanoparticles capped with a fatty acid; heating a mixture of the capped metal nanoparticles and a linear or branched first amine of C1-C7 so that a part of the fatty acid is substituted to the first amine; and heating after adding a linear or branched second amine of C8-C20 to the mixture so that the first amine is re-substituted to the second amine. According to the present invention, metal nanoparticles capped with 2 kinds of dispersants can be produced massively, and its application to ink for inkjet technique can lower the curing temperature of ink.

Abstract: An example of a multi-layer ceramic capacitor may include multiple dielectric sheets. In a cross section of each dielectric sheet, there may be printed a first external electrode, a first internal electrode which includes one or more protrusions and which is joined to the first external electrode by way of an interposed dielectric portion, a second external electrode joined as a single body to the first internal electrode, and a second internal electrode joined to the first internal electrode with a dielectric portion positioned in a space defined by the protrusions. The dielectric sheets may be stacked alternately to be symmetrical, such that the first external electrodes and the second external electrodes are electrically connected and the protrusions of the first internal electrodes and the second internal electrodes are electrically connected. In this way, the areas of the internal electrodes can be maximized.

Abstract: The present invention relates to a method for manufacturing metal nanoparticles including: preparing a first solution including a metal precursor and a non-polar solvent; preparing a second solution with adding a capping molecule presented by the following Formula 1 into the first solution; and stirring the second solution with applying heat.

Abstract: An apparatus for manufacturing metal nanoparticles is disclosed. The apparatus includes: a precursor supply unit configured to supply a precursor solution for metal nanoparticles, a transport device configured to transport the precursor solution, a heating unit connected with the precursor supply unit and configured to heat the precursor solution to a temperature range in which a production of metal nanoparticles occurs, and a cooling unit connected with the heating unit and configured to collect and cool metal nanoparticles produced at the heating unit, where the cooling unit includes: a channel, a tube surrounding the channel, and a circulator configured to supply a coolant to the tube.

Abstract: The present invention relates to a non-aqueous conductive nanoink composition including 20 to 85 parts by weight of metal nanoparticles which is chosen from silver, copper, nickel, platinum, palladium, and gold; 0.5 to 10 parts by weight of a polymer having an anhydride group; 15 to 80 parts by weight of a non-aqueous organic solvent. The non-aqueous conductive nanoink composition of the present invention prevents cracks during the drying process, increases the adhesion between wiring and substrate, and allows forming conductive wirings and films without cracks and delamination on the substrate such as polymer including polyimide and glass or silicon wafer.

Abstract: An example of a multi-layer ceramic capacitor may include multiple dielectric sheets. In a cross section of each dielectric sheet, there may be printed a first external electrode, a first internal electrode which includes one or more protrusions and which is joined to the first external electrode by way of an interposed dielectric portion, a second external electrode joined as a single body to the first internal electrode, and a second internal electrode joined to the first internal electrode with a dielectric portion positioned in a space defined by the protrusions. The dielectric sheets may be stacked alternately to be symmetrical, such that the first external electrodes and the second external electrodes are electrically connected and the protrusions of the first internal electrodes and the second internal electrodes are electrically connected. In this way, the areas of the internal electrodes can be maximized.

Abstract: The present invention provides a method for manufacturing metal nanoparticles, comprising: dissociating at least one metal precursor selected from the group consisting of silver, gold and palladium; reducing the dissociated metal precursor; and isolating the capped metal nanoparticles with an alkyl amine. The present invention provides a method for manufacturing metal nanoparticles which can be performed with a simpler equipment compared to the gas phase method, can provide metal nanoparticles in high yield by only using alkyl amine without using any surfactant in high concentration which further allows mass production, can provide metal nanoparticles having high dispersion stability and uniform size of 1-40 nm.

Abstract: The present invention relates to a method for manufacturing nickel nanoparticles and more particularly to a method including preparing a mixture solution by adding a reducing agent, a dispersing agent and a nickel salt to a polyol; stirring and heating the mixture solution; and producing nickel nanoparticles by reacting the mixture solution, so that it allows mass production of nickel nanoparticles having uniformity of size 30 to 50 nm and high dispersibility.

Abstract: The present invention relates to a method for forming a wiring of a printed circuit board and more particularly, to a method including: preparing a base film; forming a wiring pattern with ink including metal nanoparticles on the base film by printing; and forming a wring by the induction heating of the base film on which the wiring pattern is formed. The method of the present invention which minimizes the thermal strain and thermal decomposition of a base film, provides an appropriate sintering process of wirings, shortens the manufacturing process, and exhibits excellent mechanical strength is provided by using the induction heating.

Abstract: The present invention relates to a method for producing metal nanoparticles and metal nanoparticles produced thereby, in particular, to a method for producing metal nanoparticles used for inkjet that comprises, preparing metal nanoparticles capped with a fatty acid; heating a mixture of the capped metal nanoparticles and a linear or branched first amine of C1-C7 so that a part of the fatty acid is substituted to the first amine; and heating after adding a linear or branched second amine of C8-C20 to the mixture so that the first amine is re-substituted to the second amine. According to the present invention, metal nanoparticles capped with 2 kinds of dispersants can be produced massively, and its application to ink for inkjet technique can lower the curing temperature of ink.

Abstract: The present invention relates to a method for manufacturing copper nanoparticles and copper nanoparticles thus manufactured, in particular, to a method for manufacturing copper nanoparticles, wherein the method includes producing mixture by mixing one or more copper salt selected from a group consisting of CuCl2, Cu(NO3)2, CuSO4, (CH3COO)2Cu and Cu(acac)2 (copper acetyloacetate) with fatty acid and dissociating; and reacting the mixture by heating and copper nanoparticle. According to the present invention, copper nanoparticles can be synthesized in a uniform size and a high concentration using general copper salt as a copper precursor material in non-aqueous system without designing precursor material. The present invention is not only environment-friendly, but also economical as highly expensive equipment is not demanded.

Abstract: The present invention provides a method for surface modification of non-dispersible metal nanoparticles and the metal nanoparticles for inkjet printing thus modified, in particular, a method for surface modification of non-dispersible metal nanoparticles comprising, mixing metal nanoparticles having an amorphous carbon layer on the surface and an alcohol or thiol solvent, mixing a capping molecule having a carboxylic head group in the mixed solution, and (c) separating the metal nanoparticles from the mixed solution and the metal nanoparticles for inkjet printing thus modified. According to the present invention, the present invention ensures mass production, by converting non-dispersible metal nanoparticles, produced in large quantities, to nanoparticles for inkjet printing.

Abstract: The present invention relates to a method for manufacturing metal nanoparticles, more particularly, to a method for manufacturing metal nanoparticles, the method comprising: forming a mixture by dissociating a metal precursor in fatty acid; and adding a metallic salt of a metal selected from the group consisting of Sn, Mg and Fe as a metallic catalyst into the mixture and mixing the mixture and the metallic salt. According to the present invention, metal nanoparticles have a uniform particle size distribution and a high yield by performing in a non-aqueous environment without using any organic solvent, and may be environment-friendlily due to no use of a reducing agent.