2841results about "Stacked capacitors" patented technology

The invention belongs to the technical field of nickel electrode slurry preparation, discloses a preparation process of ultra-fine particle size roll-printed nickel electrode slurry for an ultra-high capacity MLCC, and aims to solve the problems that in the prior art, ultra-fine nickel powder is easy to oxidize, the cost of covering nickel nitride powder is high, a covering layer is easy to damage and agglomerate during dispersion, and the performance of the slurry is poor. The method comprises three steps of raw material pretreatment, synchronization of material dispersion and nitridation, post-treatment and nitrogen protection, wherein the pretreatment is used for removing impurities and preventing oxidation, dispersion and nitridation are carried out synergistically through a sand mill and an ultrahigh-pressure homogenizer in a graded regulation and control mode, the post-treatment comprises filtering, inspection and double-layer vacuum packaging, the raw materials are prepared according to a specific proportion, key parameters are precisely regulated and controlled, and finally the slurry is prepared. Roll printing adaptability and co-firing requirements are met, independent nitridation and reduction procedures are omitted, cost is reduced, slurry uniformity, dispersion stability and MLCC reliability are improved, and large-scale mass production can be achieved.

The invention discloses an interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material and a method. The interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material comprises a maleic anhydride grafted polypropylene matrix and a core-shell structure filler dispersed in the maleic anhydride grafted polypropylene matrix, the core-shell structure filler comprises hydroxylated boron nitride nanoparticles covalently grafted on a polymer shell layer on the surface of the core-shell structure filler; the polymer shell layer is polyglycidyl methacrylate; the epoxy group of the polymer shell layer reacts with the anhydride group of the maleic anhydride grafted polypropylene matrix to form a covalent bond. The invention has the characteristics of strong interface bonding force, uniform filler dispersion, and excellent comprehensive electrical properties and processability.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a high-performance polypropylene capacitor film. The preparation process comprises the following steps: A1, preparing a polypropylene capacitor film; a2, carrying out surface cleaning and activation pretreatment on the polypropylene capacitance film; a3, evaporating a gradient modified layer on the surface of the pretreated polypropylene capacitance film; a4, carrying out laser plasma synergistic treatment and crystallinity regulation and control on the modified polypropylene capacitor film; and A5, coating the outer layer of the modified polypropylene capacitance film with a functional layer, and carrying out annealing post-treatment to prepare the high-performance polypropylene capacitance film. The mechanical strength and the electrical stability are improved through nano filler dispersion, two-way stretching and crystallinity regulation and control; through the collaborative design of surface cleaning and activation and a gradient functional layer, excellent interface bonding force and environmental adaptability are given; and by means of technologies such as multi-source evaporation and laser plasma co-processing, precise regulation and control and diversified expansion of the performance are achieved, the method is suitable for various scenes, and the process repeatability is good.

The invention provides a capacitor core rod plug dismounting device, and belongs to the technical field of capacitor preparation, and the device comprises a strip-shaped frame which is vertical and is provided with two open ends, and the front and rear inner side surfaces are provided with guide grooves; the clamping assembly comprises two movable rods arranged on the two sides of the strip-shaped frame respectively, the axes of the two movable rods are coaxial and are perpendicular to the side face of the strip-shaped frame, and the opposite ends of the two movable rods are elastically arranged in a telescopic mode along the axes and are provided with clamping plates; the two movable rods are synchronously and oppositely arranged along the axis in a moving manner; the pair of bearing rods is horizontally arranged below the strip-shaped frame and perpendicular to the side face of the strip-shaped frame, and the two bearing rods are movably arranged in the width direction of the strip-shaped frame; the dismantling assembly comprises two pairs of top plates which are vertically arranged below the corresponding guide grooves respectively, and the top plates are movably arranged in the width direction of the strip-shaped frame and the axis direction of the movable rod; the two bearing rods respectively penetrate through the two pairs of top plates; and the transmission assembly is arranged between the movable rod and the bearing rod. The dismounting device can achieve the purpose of automatically pulling out the plug, and the production efficiency of the thin film capacitor is improved.

The invention relates to a biaxially oriented polypropylene composite film for a capacitor and a preparation method of the biaxially oriented polypropylene composite film. The biaxially oriented polypropylene composite film is of an ABA three-layer structure; wherein the layer A is prepared from the following raw materials: PP, a nucleating agent and a composite filler of MAH-g-PP and nanoparticles; the layer B is prepared from the following raw materials: PET master batch, modified silicon dioxide and a brush polymer. According to the preparation method, the three-layer structure composite film is prepared, the layers are firmly combined through covalent bonds, hydrogen-bond interaction and the like, and the interlayer peel strength is remarkably improved; a nano particle filler with a high dielectric constant is introduced into the A-layer structure, so that the dielectric strength of the film is improved, and meanwhile, the film has relatively high anti-breakdown strength; and the layer B effectively improves the mechanical stability of the film material, and has higher mechanical property and material rigidity compared with the traditional PP film.

A multilayer ceramic electronic component includes a multilayer body including first and second internal electrode layers extending first and second end surfaces, first and second external electrodes respectively on the first and second end surfaces and respectively connected to the first and second internal electrode layers. The first external electrode includes first and third Cu plating layers, the second external electrode includes second and fourth Cu plating layers. Average numbers of Cu particles are about 1.5 or less in two or more first or second square regions of the first and second Cu plating layers. Average numbers of Cu particles are more than about 1.5 in two or more third or fourth square regions of the third and fourth Cu plating layer. The first square regions to the fourth square regions each has a square or substantially square shape with each side having a dimension of about 2 μm.

To provide a conductive paste for an internal electrode of a layered ceramic capacitor, which is capable of maintaining relatively high coverage even if the internal electrode constitutes a thin layer.SOLUTION: Provided is a conductive paste for forming internal electrodes 4 and 5 of a layered ceramic capacitor 1 fabricated through a firing step. The conductive paste includes conductive metal powder, ceramic powder, an organic solvent, and an organic binder. The conductive metal powder contains a silver / palladium alloy. At least a portion of the ceramic powder comprises an ABO3 type oxide having a specific ion radius in which the ratio of the ion radius in the 6-coordination of an element at the A site in ABO3 with respect to the ion radius in the 6-coordination of a metal element contained in the conductive metal powder is 0.96 or more and 1.10 or less.SELECTED DRAWING: Figure 1

The invention relates to the technical field of capacitor films, and discloses a modified polypropylene base film for a capacitor and a preparation method of the modified polypropylene base film. The modified polypropylene base film for the capacitor is prepared from the following raw materials in parts by weight: 90 to 110 parts of polypropylene, 20 to 30 parts of hyperbranched organic silicon, 10 to 15 parts of a composite modifier, 3 to 5 parts of a compatilizer, 0.3 to 0.6 part of an antioxidant and 0.5 to 1.5 parts of a lubricant, according to the base film, polypropylene is used as a main raw material, hyperbranched organic silicon, a composite modifier, a compatilizer and other auxiliaries are added for modification, the polypropylene base film is endowed with excellent breakdown resistance, dielectric property and high temperature resistance, and the base film has wide application prospects in capacitors.

The invention relates to the technical field of dielectric ceramic powder preparation processes, in particular to a multilayer ceramic capacitor, high-activity nano barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano barium titanate powder, and the method comprises the following steps: (1) reacting soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating the surfaces of the barium carbonate precursor particles with nano titanium dioxide particles by using a supercritical fluid flash evaporation technology to form a composite precursor; and (3) carrying out solid-phase synthesis reaction on the composite precursor, and sintering to obtain the nano barium titanate powder. Through the synergistic effect of two means of high-activity precursor preparation and nanoscale uniform coating, the composite precursor with extremely high specific surface area, surface energy and microcosmic uniformity is prepared, the thermal sintering temperature is effectively reduced, abnormal growth of crystal grains and lattice distortion are restrained, and the preparation method has the advantages that the preparation process is simple, and the preparation cost is low. The tetragonality of the nano barium titanate powder is obviously improved.

The present application relates to the technical field of dielectric ceramic powder preparation, and particularly relates to a multilayer ceramic capacitor, a high-activity nano-barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano-barium titanate powder, the method comprising the following steps: (1) reacting a soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating nano-titanium dioxide particles on the surface of the barium carbonate precursor particles by using a supercritical fluid flash technology to form a composite precursor; and (3) performing a solid-phase synthesis reaction on the composite precursor and sintering to obtain nano-barium titanate powder. The present application, through the synergistic effect of the two means of "high-activity precursor preparation" and "nano-level uniform coating", prepares a composite precursor with extremely high specific surface area, surface energy and micro-uniformity, effectively reduces the heat sintering temperature, suppresses abnormal grain growth and lattice distortion, and significantly improves the tetragonality of the nano-barium titanate powder.

An electronic device and a manufacturing method including a dielectric layer according to at least some embodiments are disclosed. The electronic device includes a first electrode, a second electrode spaced apart from the first electrode, a first dielectric layer between the first electrode and the second electrode, a second dielectric layer having a rutile phase, a third dielectric layer between the first dielectric layer and the second electrode, and a third dielectric layer between the second dielectric layer and the second electrode and including a material having a higher energy bandgap than a material included in the second dielectric layer.

The invention relates to a base metal high-voltage multilayer ceramic dielectric capacitor and a preparation method, the base metal high-voltage multilayer ceramic dielectric capacitor is formed by stacking and firing dielectric layers, and each dielectric layer comprises a dielectric layer and an electrode printed on the dielectric layer. The dielectric layer comprises the following raw materials: a BMYT main matrix, an NN material, magnesium oxide, manganous-manganic oxide, zirconium dioxide, calcium carbonate, strontium carbonate and rare earth oxide; through the raw material composition and the preparation method of the ceramic dielectric capacitor, the prepared ceramic dielectric capacitor has excellent performances of high dielectric constant, high voltage resistance, stable dielectric-temperature characteristic curve, low loss, high insulation resistance, long-term high-voltage reliability and the like under the condition of high dielectric thickness (30 microns before firing).

A filter apparatus includes first to third resonators magnetically coupled and located in a signal transmission path from an input terminal to an output terminal. Each of the resonators includes a capacitor electrode and an inductor path. The capacitor and a ground electrode define a capacitor. The inductor path connects the capacitor and ground electrodes. The inductor path in the second resonator includes first and second lines electrically connected in parallel, between the capacitor electrode of the second resonator and the ground electrode. A first interconnection pattern connects the inductor path in the first resonator and the first line. A third interconnection pattern connects the inductor path in the third resonator and the second line. A second interconnection pattern connects the first and second lines at a position different from a position of connection of the first interconnection pattern in the first line.

A multilayer electronic component includes a body including a capacitance formation portion including a dielectric layer and internal electrodes alternately arranged in a first direction and cover portions disposed on the capacitance formation portion in the first direction, first to sixth surfaces; external electrodes disposed on the third and fourth surfaces; side margin portions disposed on the fifth and sixth surfaces; and a first extension portion disposed to extend to portions of the first and second surfaces, and wherein at least a partial region of the first extension portion has a curvature, wherein when an average thickness of the side margin portion is WM0 and a radius of curvature of at least a portion of the first extension portion is R, WM0 and R may satisfy 1.1<R / WM0<2.

The invention discloses a high-temperature-resistant poly (4-methyl-1-pentene) dielectric film with synergistically improved insulating strength and dielectric property and a preparation method and application thereof, and belongs to the field of preparation processes of polymer energy storage dielectric materials. The invention aims to solve the problems that the existing polymer energy storage material is low in energy storage density at high temperature, and the dielectric property and the insulating strength cannot be improved at the same time. The invention provides a method for preparing a norbornene dianhydride grafted poly (4-methyl-1-pentene) film by a two-step method by using poly (4-methyl-1-pentene) particles, norbornene dianhydride and dicumyl peroxide and combining a solution suspension technology with a melt casting extrusion technology and a one-way stretching traction technology. The high-temperature-resistant poly (4-methyl-1-pentene)-based dielectric film prepared by the invention has excellent breakdown strength and dielectric property, and the discharge energy density is as high as 5.92 J / cm < 3 > when the charge-discharge efficiency is greater than or equal to 90% at 150 DEG C.

To provide a laminate type electronic component that relieves a problem of deterioration in moisture resistance reliability of the laminate type electronic component that occurs due to the decrease in a moisture resistance permeation path.SOLUTION: A laminate type electronic component includes: a dielectric layer 111; internal electrodes 121 and 122 disposed alternately with the dielectric layer in a first direction; a lamination part 110 having a first surface and a second surface which face each other in the first direction, a third surface and a fourth surface which face each other in a second direction that is perpendicular to the first direction and is coupled to at least a part of the internal electrodes, and a fifth surface and a sixth surface which face each other in a third direction that is perpendicular to the first direction and the second direction; a protection part 120 disposed on the third surface and the fourth surface; and external electrodes 131 and 132 disposed on the lamination part and the protection part and coupled to the internal electrodes. The dielectric layer includes a first dielectric crystal grain and the protection part includes a second dielectric crystal grain. An average size of the second dielectric crystal grains may be smaller than an average size of the first dielectric crystal grains.SELECTED DRAWING: Figure 3

An electrolytic capacitor includes a capacitor element that includes an anode part and a cathode part, an exterior body that seals the capacitor element, a first external electrode that is electrically connected to the anode part, and a second external electrode that is electrically connected to the cathode part. At least one of an end face of the anode part or an end face of the cathode part is exposed from the exterior body to be electrically connected to a corresponding one of the first external electrode or the second external electrode. The end face exposed from the exterior body is covered with an electroless Ni plating layer, and the electroless Ni plating layer is covered with an electroless Ag plating layer. The electroless Ag plating layer is covered with the corresponding one of the first external electrode or the second external electrode.

The invention discloses a flame-retardant breakdown-resistant capacitor base film and a preparation method thereof. The flame-retardant breakdown-resistant capacitor base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene; 3.5 to 8.5 parts of a compatilizer; 14-25 parts of a flame-retardant dielectric modified filler; 0.3 to 1 part of an antioxidant; 0.5 to 1.8 parts of a nucleating agent; wherein the flame-retardant dielectric modified filler is a composite microcapsule obtained by coating the core material with nano magnesium hydroxide as a core material and silicon dioxide modified polydopamine as a wall material. The flame-retardant dielectric modified filler is added into a polypropylene system, so that the prepared polypropylene capacitor base film can be endowed with excellent flame retardance, the mechanical strength of the base film can be improved, the dielectric constant of the base film can be improved, the electric breakdown resistance of the polypropylene capacitor base film can be improved, and the comprehensive performance of the polypropylene capacitor base film can be improved.

The present application belongs to the technical field of polymer dielectric energy storage material, and discloses a preparation method of a full-organic small-molecule composite polymer film and a product. The preparation method comprises the following steps: mixing a mixed solution of PVDF and PMMA with a PE EU solution to form a pre-preparation solution; casting the pre-preparation solution on a substrate and heating and drying, and then heat treating in a vacuum environment to obtain the required composite polymer film. The present application also discloses the product prepared by the above preparation method. Through the present application, the problems of low discharge energy density and charge-discharge efficiency of ferroelectric-based polymer films are solved.

To provide a multilayer ceramic capacitor in which occurrence of cracking or chipping at a boundary part between an end face side ineffective part and a vertical ridge line ineffective part of a laminated body is prevented.SOLUTION: A multilayer ceramic capacitor 1 includes: a multilayer body 10 including a plurality of stacked dielectric layers 20 and a plurality of internal electrode layers 30; and an external electrode 40 disposed so as to be electrically connected to the internal electrode layers 30. An outer surface of the multilayer body 10 at a boundary part VLB between an end face side ineffective part LG and a vertical ridge line ineffective part VG, the outer surface of a vertical ridge line ineffective part VG, and the outer surface of the multilayer body at a boundary part VWB between the vertical ridge line ineffective part VG and the side face side ineffective part WG form a continuous curved surface VR protruding outward in a plan view from a multilayer direction T, and a protective film SC containing carbon and silicon as constituent elements is formed on the curved surface VR.SELECTED DRAWING: Figure 3

A disclosed multilayer ceramic electronic component includes: a stacked body that includes a plurality of dielectric layers stacked in a first direction and a plurality of internal electrodes stacked in the first direction; and a first external electrode, a second external electrode, a third external electrode, and a fourth external electrode that are disposed outside the stacked body. The plurality of internal electrodes includes a plurality of first internal electrodes connected to the first external electrode and the second external electrode and a plurality of second internal electrodes connected to the third external electrode and the fourth external electrode, and an edge of a cross-section of the stacked body that intersects the first direction is a curve.

The application discloses a quinoline small molecule blended modified polymer dielectric material and a preparation method and application thereof, and belongs to the technical field of capacitor films. The preparation raw materials comprise quinoline derivatives, polymethyl methacrylate, styrene-methyl methacrylate copolymer, polyetherimide, polypropylene and N-methyl pyrrolidone solution, and the preparation steps comprise blending and film preparation. The blending solution or eutectic mixture is prepared through blending, and the polymer dielectric film is prepared through a flow casting method or bidirectional stretching. The prepared quinoline small molecule blended modified polymer dielectric film has excellent electrical properties, can reduce the leakage current of the polymer material, has high DC breakdown field strength, high energy storage density and low energy loss, and is easy to realize large-scale production.

A method for preparing a green-body chip of three-terminal multi-layer ceramic capacitive filter is provided. The method includes: providing a printing plate which includes a pattern of a tabbed electrode and a pattern of a through electrode, the pattern of the tabbed electrode and the pattern of the through electrode, an avoiding portion is provided on a position of both sides of the through electrode corresponding to the tab of the tabbed electrode. A supporting pattern is provided on both ends of the tabbed electrode; placing the printing plate and performing electrode printing on the green sheet after casting; stacking the green sheet after printing according to a certain offset, and laminating after stacking to obtain a block; dicing the block to obtain the green-body chip of three-terminal multi-layer ceramic capacitive filter.

In certain examples, methods and semiconductor structures are directed to a force-sensing apparatus (e.g., synthetic skin) comprising an electrode layer and a plurality of deformation-recoverable microstructures in a dielectric region adjacent the electrode layer. In various examples, the deformation-recoverable microstructures are at randomly configured (e.g., in terms of morphology and / or spatial distribution) and, as in a capacitive-type sensor, the dielectric region may include a dielectric layer between a pair of electrode layers and with the dielectric layer and / or at least one of the electrode layers having such deformation- recoverable microstructures integrated into a surface and extending in a direction to sense forces applied towards or against the force-sensing apparatus.

A method for manufacturing a multi-layer ceramic capacitor (MLCC) end electrode and printing a full-area inner electrode protective layer is disclosed. The method uses thin dielectric ceramic layer thickness and a plurality of nickel inner electrode stacks to achieve high capacitance. The method produces high-density electrode-to-ceramic ratio end edges and side edges. The method uses an ultralow-temperature electrochemical deposition coating technology to manufacture a low-stress multi-layer ceramic capacitor end electrode and an insulating protective layer, thereby improving the yield of the multi-layer ceramic capacitor and reducing manufacturing costs.

A multilayer ceramic capacitor includes internal electrode layers including first internal electrode layers, second internal electrode layers, and intermediate electrode layers. At least a portion of each of the intermediate electrode layers has a coverage higher than a coverage of a region of a first counter portion of each of the first internal electrode layers adjacent to a first end surface, and a coverage higher than a coverage of a region of a second counter portion of each of the second internal electrode layers adjacent to a second end surface.

The invention discloses a preparation method of a heat-resistant, flame-retardant and electric-breakdown-resistant modified polypropylene capacitor base film. The preparation method comprises the following steps: S1, preparing composite intercalation organic montmorillonite and microcapsule type reinforced particles; s2, preparing a modified polypropylene master batch: mixing the polypropylene master batch, the composite intercalated organic montmorillonite, the microcapsule type reinforced particles, an initiator and an auxiliary agent, heating and stirring to obtain the modified polypropylene master batch; s3, adding polyvinylidene fluoride into the premix, heating and stirring, and carrying out melt extrusion on the obtained mixture; s3, cooling the casting piece; s4, biaxial stretching, heat setting, cooling and corona treatment are carried out, and the heat-resistant, flame-retardant and electric-breakdown-resistant modified polypropylene capacitor base film is obtained. The polypropylene is filled and modified through the composite intercalation organic montmorillonite and the microcapsule type reinforced particles, and the polyvinylidene fluoride is compounded and added, so that the heat resistance, flame retardance, electric breakdown resistance and mechanical strength of the polypropylene capacitor base film can be comprehensively improved.

A multilayer electronic component is provided, the multilayer electronic component, including: a body including a dielectric layer and internal electrodes alternately disposed with the dielectric layer interposed therebetween in a first direction, the body having first and second surfaces opposing each other in the first direction, third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction, fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other in a third direction; and an external electrode disposed on the third and fourth surfaces of the body and connected to the internal electrodes. At least one of the internal electrodes includes an interfacial layer disposed on at least a portion of a region connected to the external electrode, and the interfacial layer includes an oxide containing Fe.

A multilayer ceramic electronic component includes a multilayer body and a pair of external electrodes at both ends of the multilayer body. The external electrodes include a main surface-side external electrode including a recess recessed towards a multilayer body side in a cross-sectional view along a lamination direction and a length direction of the multilayer body, and peripheral regions adjacent to the recess in the length direction. A surface roughness of the recess is rougher than a surface roughness of the peripheral regions.