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Dowa Electronics Materials Co Ltd
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Dowa Electronics Materials Co Ltd patents


Recent patent applications related to Dowa Electronics Materials Co Ltd. Dowa Electronics Materials Co Ltd is listed as an Agent/Assignee. Note: Dowa Electronics Materials Co Ltd may have other listings under different names/spellings. We're not affiliated with Dowa Electronics Materials Co Ltd, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "D" | Dowa Electronics Materials Co Ltd-related inventors


Spherical silver powder and producing same

While a water reaction system containing silver ions is irradiated with ultrasonic waves to cause cavitation therein, a reducing agent containing solution, which contains an aldehyde as a reducing agent, is mixed with the water reaction system to deposit silver particles, the solid-liquid separation of which is carried out, and... Dowa Electronics Materials Co Ltd

Electroconductive film and producing same

To provide a copper electroconductive film formed on a paper substrate, the copper electroconductive film being considerably improved in weather resistance and electroconductivity. The problem can be achieved by an electroconductive film formed by pressing a sintered electroconductive film formed by sintering copper particles in a coating film containing copper... Dowa Electronics Materials Co Ltd

Carrier core material and electrophotographic development carrier using same and electrophotographic developer

A carrier core material is represented by a composition formula MxFe3-xO4 (where M is Mn and/or Mg, and X is a total of Mn and Mg and is a substitution number of Fe by Mn and Mg, 0<X≦1), in which 5 to 20 number percent of bound particles where 2... Dowa Electronics Materials Co Ltd

Carrier core material and electrophotographic development carrier using same and electrophotographic developer

A carrier core material includes, a main component, a material represented by a composition formula MnXMYFe3-(X+Y)O4 (where M is selected from Mg, Ti, Cu, Zn and Ni, 0<X, 0≦Y, 0<X+Y<1), in which 0.1 to 1.0 mol % of at least one of Sr element and Ca element is contained as... Dowa Electronics Materials Co Ltd

Surface-modified iron-based oxide magnetic particle powder, and producing same

A surface-modified iron-based oxide magnetic particle powder has good solid-liquid separation property in the production process, has good dispersibility in a coating material for forming a coating-type magnetic recording medium, has good orientation property, and has a small elution amount of a water-soluble alkali metal, and to provide a method... Dowa Electronics Materials Co Ltd

Magnetic compound, antenna, and electronic device

An object of the present invention is to provide a magnetic compound excellent in high-frequency property and excellent in mechanical strength and related materials thereof by using at least one of resins selected from syndiotactic polystyrene (SPS) resin and modified polyphenylene ether (m-PPE) resin, including at least one of resins... Dowa Electronics Materials Co Ltd

Carrier core material

A carrier core material is provided that is formed with ferrite particles which can uniformly adhere a coupling agent to the entire surface. A carrier core material is formed with ferrite particles, and the powder pH of the ferrite particles is equal to or more than 9. Here, the ferrite... Dowa Electronics Materials Co Ltd

Wafer group, wafer manufacturing device, and wafer manufacturing method

A wafer group facilitates securing uniformity of products manufactured from the wafer group whose composition varies among wafers. A technique excludes uncertain factors in forming OF, forming OF with extremely high probability and extremely high accuracy, the wafer group being constituted by a plurality of wafers obtained from the same... Dowa Electronics Materials Co Ltd

Iii-nitride semiconductor light emitting device and producing the same

Provided is a III-nitride semiconductor light-emitting device having excellent device lifetime as compared with conventional devices and a method of producing the same. A III-nitride semiconductor light-emitting device 100 has an n-type semiconductor layer 30, a light emitting layer 40 containing at least Al, an electron blocking layer 50, and... Dowa Electronics Materials Co Ltd

Iron-based oxide magnetic particle powder, producing same, coating material, and magnetic recording medium

An iron-based oxide magnetic particle powder has a narrow particle size distribution a small content of fine particles that do not contribute to magnetic recording characteristics, and a narrow coercive force distribution, to enhance magnetic recording medium density. Neutralizing an aqueous solution containing a trivalent iron ion and an ion... Dowa Electronics Materials Co Ltd

Conductive paste and producing conductive film using same

After there is prepared a conductive paste which contains fine copper particles having an average particle diameter of 1 to 100 nm, each of the fine copper particles being coated with an azole compound, such as benzotriazole, coarse copper particles having an average particle diameter of 0.3 to 20 μm,... Dowa Electronics Materials Co Ltd

Oriented body containing e-iron oxide, producing the same, and device for producing the same

There are provided an oriented body such as a magnetic sheet in which a value of degree of orientation of magnetic particles is beyond 3.5, and a method for producing the same, and a device for producing the same, wherein the oriented body such as a magnetic sheet is produced... Dowa Electronics Materials Co Ltd

Method of producing iii nitride semiconductor light-emitting device and iii nitride semiconductor light-emitting device

We propose a method of producing a III nitride semiconductor light-emitting device including a p-type semiconductor layer, in which the p-type semiconductor layer is formed by the steps comprising: an electron blocking layer formation step for forming an electron blocking layer made of AlyGa1-yN (b<y≦1) on a light emitting layer;... Dowa Electronics Materials Co Ltd

Ferrite powder for bonded magnets, producing the same and ferrite bonded magnet

There is provided a ferrite powder for bonded magnets capable of producing ferrite bonded magnets with high BHmax, excellent in MFR when converted to a compound, with high p-iHc, wherein an average particle size of particles obtained by a dry laser diffraction measurement is 5 μm or less, a specific... Dowa Electronics Materials Co Ltd

Ferrite powder for bonded magnets, producing the same and ferrite bonded magnet

A ferrite powder for bonded magnets capable of producing a ferrite bonded magnet having high BHmax, and excellent in fluidity when converted to a compound, and having a high p-iHc value, and a method for producing the same, and a ferrite bonded magnet using the ferrite powder for bonded magnets,... Dowa Electronics Materials Co Ltd

Group iii nitride semiconductor light emitting device and manufacture the same

Provided is a III nitride semiconductor light emitting device with improved reliability capable of maintaining light output power reliably as compared with conventional devices, and a method of producing the same. The III-nitride semiconductor light-emitting device comprising: a light emitting layer, a p-type electron blocking layer, a p-type contact layer,... Dowa Electronics Materials Co Ltd

Ferrite powder for bonded magnets, producing the same and ferrite bonded magnet

A ferrite powder for bonded magnets having a high iHc value usable even in a low temperature environment, a method for producing the same, and a bonded magnet using the ferrite powder and having high iHc value which can be used even in a low temperature environment, wherein a specific... Dowa Electronics Materials Co Ltd

Iron-based oxide magnetic particle powder and producing iron-based oxide magnetic particle powder

An e-type iron-based oxide magnetic particle powder has narrow particle size distribution and has a low content of fine particles which do not contribute to magnetic recording characteristics. As a result, a narrow coercive force distribution is achieved and the powder is suitable for increasing recording density of a magnetic... Dowa Electronics Materials Co Ltd

Method for producing metal nanowires having improved uniformity in length distribution

A method for producing metal nanowires having improved uniformity in length distribution and having a small abundance ratio of short nanowire comprises making metal nanowires to flow accompanied by a flow of a liquid medium in a tubular flow path having, on a wall of the flow path, a porous... Dowa Electronics Materials Co Ltd

Silver powder, producing same, and conductive paste

A silver powder, including: an organic substance on a surface of the silver powder, the organic substance containing at least one carboxyl group and at least one hydroxyl group in one molecule of the organic substance, wherein a ratio of (Casson yield value/BET specific surface area) is 500 or less,... Dowa Electronics Materials Co Ltd

Silver powder, producing same, and conductive paste

A silver powder, including: an organic substance on a surface of the silver powder, the organic substance containing at least one carboxyl group and at least one hydroxyl group in one molecule of the organic substance, wherein a BET specific surface area of the silver powder is 0.1 m2/g or... Dowa Electronics Materials Co Ltd

Bonding material and bonding method using same

There is provided an inexpensive bonding material, which can be easily printed on articles to be bonded to each other and which can suppress the generation of voids in the bonded portions of the articles to be bonded to each other, and a bonding method using the same. In a... Dowa Electronics Materials Co Ltd

Silver-coated copper powder and producing same

There is provided a silver-coated copper powder, which has excellent storage stability (reliability), and a method for producing the same. A silver-coated copper powder obtained by coating the surface of a copper powder, which is obtained by the atomizing method or the like, with 5 wt % or more (with... Dowa Electronics Materials Co Ltd

Silver powder, producing same, and hydrophilic conductive paste

A silver powder, wherein the silver powder satisfies D50-IPA>D50-W, where in measurement of a volume-based particle size distribution of the silver powder by a laser diffraction particle size distribution analysis, D50-IPA (μm) is a cumulative 50% point of particle diameter of the silver powder when isopropyl alcohol (IPA) is used... Dowa Electronics Materials Co Ltd

Silver powder and producing same

There is provided a silver powder, which is able to obtain a conductive paste having a high thixotropic ratio and a high Casson yield value and which is able to form a conductive pattern having a low resistance, and a method for producing the same. An aliphatic amine such as... Dowa Electronics Materials Co Ltd

Magnetic iron oxide nanopowder and process for producing the same

A magnetic σ-form iron oxide nanopowder is a novel magnetic iron oxide nanopowder having magnetic polarization and spontaneous electric polarization and having physical properties similar to those of half-metals; and a process produces the magnetic nanopowder. The magnetic powder has a composition represented by Fe2O3 and has a crystal structure... Dowa Electronics Materials Co Ltd

Rfid tag substrate using paper substrate, and rfid tag

An RFID tag substrate contains a paper substrate having an eluted chloride ion amount per unit mass (1 g) of 0.100 mg or less, having formed on a surface thereof a conduction circuit. A specimen of the paper substrate is broken into small pieces each of 100 mm2 or less.... Dowa Electronics Materials Co Ltd

Silver nanowires, and production method and dispersion of the same

Silver nanowires coated with, instead of a polymer protective agent such as PVP, an organic protective agent having a smaller molecular weight are provided. The silver nanowires have an average diameter of 100 nm or less and an average length of 5 μm or more, and a thiol having a... Dowa Electronics Materials Co Ltd

Bonding material and bonding method using same

A bonding material of a silver paste contains: fine silver particles having an average primary particle diameter of 1 to 200 nm, each of the fine silver particles being coated with an organic compound having a carbon number of not greater than 8, such as sorbic acid; and a solvent... Dowa Electronics Materials Co Ltd

Metal composite powder and producing same

After preparing a silver-coated copper powder wherein the surface of a copper powder having an average particle diameter of 0.1 to 100 μm is coated with silver, the silver-coated copper powder is sprayed into the tail flame region of a thermal plasma to cause silver on the surface of the... Dowa Electronics Materials Co Ltd

Metal composite powder and producing same

There is prepared a silver-coated copper powder wherein the surface of a copper powder having an average particle diameter of 0.1 to 100 μm is coated with 5% by weight or more of silver, and the silver-coated copper powder is sprayed into the tail flame region of a thermal plasma... Dowa Electronics Materials Co Ltd

Fine silver particle dispersing solution

In a fine silver particle dispersing solution wherein 30 to 75% by weight of fine silver particles, which are coated with an organic acid having a carbon number of 5 to 8 or a derivative thereof and which have an average particle diameter of 1 to 100 nm, are dispersed... Dowa Electronics Materials Co Ltd

Bonding material and bonding method using same

A bonding material includes: fine silver particles having an average primary particle diameter of 1 to 50 nm, each of the fine silver particles being coated with an organic compound having a carbon number of not greater than 8, such as hexanoic acid; silver particles having an average primary particle... Dowa Electronics Materials Co Ltd

Method for producing silver nanowires ink, silver nanowires ink, and transparent conductive coated film

A method for producing a silver nanowires ink comprises adding a viscosity modifier and a water-soluble acrylic-urethane copolymer resin to an aqueous solvent or a mixed solvent of water and an alcohol having silver nanowires dispersed therein. The content of the water-soluble acrylic-urethane copolymer resin with respect to the total... Dowa Electronics Materials Co Ltd








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