Abstract:
PROBLEM TO BE SOLVED: To provide an electrolytic copper foil having a low roughness surface which is suitable for an electrolytic copper foil material used for a Tape Automated Bonding method and does not substantially have an uneven shape formed in a rough surface side, has high tensile strength, and does not cause the peeling of a tin plating film. SOLUTION: This method for producing the electrolytic copper foil includes: using an aqueous solution of sulfuric acid and copper sulfate as an electrolytic solution; using an insoluble anode made from a platinum group element or titanium covered with an oxide of the platinum group element, and a cathode drum made from titanium opposing to the anode; and passing a direct current between both of the electrodes, wherein the electrolytic solution contains a non-ionic water-soluble polymer, a sulfonate of an active organosulfur compound, a thiourea-based compound and a chlorine ion existing therein. Thereby obtained electrolytic copper foil has: a rough surface of which the roughness is 2.0 μm or less; a crystal structure on the rough surface side, in which the orientation index determined from a relative intensity in a 220 copper diffraction line measured with an X-ray diffraction technique is 5.0 or more; and tensile strength of 500 MPa or more after having been heated at 180°C for 1 hour. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a material for a radiation shield which has a satisfactory shielding performance in radiation facilities where both neutrons and gamma rays exist and can furnish a working environment that allows health care professionals to work safely even especially in a medical front where low-level neutrons are anticipated.SOLUTION: In the radiation shield, the surface of globular lead powder that has a diameter of 0.2 to 2 mm is coated with boride such as boron oxide and boric acid. The radiation shield may be housed in an ejectable container after being put into a bag made of a woven cloth, a nonwoven cloth or a resin film, being molded into an arbitrary form such as a brick and a plate through the mixing of the radiation shield and resin and mixing the radiation shield and the resin. Epoxy resin, a mixture of silicone resin and epoxy resin, silicone resin and the like are preferable as a resin used in this occasion.
Abstract:
PROBLEM TO BE SOLVED: To provide a copper alloy which has high strength and high electric conduction compatibly. SOLUTION: In the copper alloy, by subjecting an alloy having a proper composition to casting, cold-working and aging treatment, a composite texture of a eutectic crystal composed of a primary crystal Cu dendrite and a Cu phase and a compound phase, in which a super-saturated solid solution of additional elements is formed, is stretched by cold-working and the texture in which desired microscopic compound phases are dispersed by aging treatment is formed. By virtue of the tissue, the copper alloy can have high strength and high electric conduction compatibly. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide composite metal foil which can directly transfer very thin copper foil subjected to treatment for preventing the reflection of laser beams to a base material, a method for producing the composite metal foil, and a printed wiring board with the copper foil transferred by the composite metal foil. SOLUTION: In the composite metal foil having a support 2 made of metal foil, a release layer 3 laminated on the support, and a copper foil layer 4 laminated on the release layer, the copper foil layer is formed by a first copper foil layer 5 which is electrodeposited on the surface of the release layer by a copper citrate aqueous solution and a second copper foil layer 6 which is electrodeposited on the surface of the first copper foil layer by a copper sulfate aqueous solution. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a dispersion ink of ultrafine particles of a metal, in which copper nanoparticles are filled at high concentration in a phenol resin. SOLUTION: This production method includes adding copper hydroxide into an alcohol solution in which approximately 0.5-15 mass% of the phenol resin has been dispersed, stirring the mixed liquid, and adding a reducing agent such as hydrazine into the mixed liquid to precipitate the copper nanoparticles. The precipitated copper nanoparticles have the average particle diameter of 100 nm or less, are uniformly dispersed at high concentration in the precipitate in a state of having the phenol resin adsorbed on the surface. The paint film can be used as a material of an electroconductive ink and the like, because of showing high electroconductivity. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an electromagnetic wave suppression sheet for further providing a light-weight and flexible noise suppression membrane that can easily cope with a complicated shape only within a small space as a more simplified means for preventing not only the self-poisoning, shielding and suppression of noise to the outside of an electronic apparatus but also an interference phenomenon by self-poisoning within the electronic apparatus. SOLUTION: The method of manufacturing the electromagnetic wave noise suppression sheet includes steps of forming a conductor layer 2 by coating a conductive painting material on a base material 1 and forming a magnetic layer 3 by coating a magnetic painting material on the conductor layer 2. COPYRIGHT: (C)2010,JPO&INPIT