摘要:
A method for manufacturing a ceramic electronic component having excellent solderability is provided. In this method, the elution of barium from the ceramic electronic component and the adhesion of ceramic electronic components in tin plating are reduced. The method for manufacturing a ceramic electronic component includes the steps of providing an electronic component of barium-containing ceramic and forming an electrode on the outer surface of the electronic component, the electrode being electroplated with tin. In this method, a plating bath used in the tin plating has a tin ion concentration A in the range of 0.03 to 0.51 mol/L, a sulfate ion concentration B in the range of 0.005 to 0.31 mol/L, a molar ratio B/A of less than one, and a pH in the range of 6.1 to 10.5.
摘要:
An object of the present invention is to provide helpful means which enables: genetic applications such as insertion into an expression vector and transformation of a human CaT1 gene; clarification of a calcium absorption activity mechanism such as the presence of a factor affecting the regulation of a calcium absorption activity of human CaT1; and confirmation and new finding of a calcium absorption regulator. Namely, a human CaT1 gene, a plasmid vector thereof, a transformant transformed by the plasmid vector thereof, a method of screening a calcium absorption regulator and a screening kit thereof, and a calcium absorption promoter are provided by the present invention.
摘要:
A high temperature superconductive Josephson tunnel junction of which a plasma frequency varies depending on an intersecting angle is provided by bonding two single crystals of a high temperature superconductor on a substrate in a range of intersecting angles of 0 degree to 90 degrees and by forming a single high temperature superconductive Josephson tunnel junction in a bonded portion.
摘要:
A method of forming a novel high temperature superconducting Josephson junction which is capable of achieving a formation of a Josephson junction having high characteristics conveniently and quickly without necessitating costly micromachining facilities. Two high temperature superconducting whisker crystals are crossed with each other on a substrate and subjected to thermal treatment to form a Josephson junction between the two high temperature superconducting whisker crystals.
摘要:
A mixer for a liquid chromatograph mixes plural kinds of liquids. It has a first mixer 45 for forcibly agitating the liquids and a second mixer 58 for agitating the liquids in accordance with a flow rate. Liquid passages of the first and second mixers 45, 58 are in communication with each other, and the first and second mixers 45, 58 are integrally mounted.
摘要:
A method for manufacturing a ceramic electronic component having excellent solderability is provided. In this method, the elution of barium from the ceramic electronic component and the adhesion of ceramic electronic components in tin plating are reduced. The method for manufacturing a ceramic electronic component includes the steps of providing an electronic component of barium-containing ceramic and forming an electrode on the outer surface of the electronic component, the electrode being electroplated with tin. In this method, a plating bath used in the tin plating has a tin ion concentration A in the range of 0.03 to 0.51 mol/L, a sulfate ion concentration B in the range of 0.005 to 0.31 mol/L, a molar ratio B/A of less than one, and a pH in the range of 6.1 to 10.5.
摘要:
A method for manufacturing a laminated electronic component is performed such that a water-repellent agent is applied to end surfaces at which ends of internal electrodes are exposed so as to be filled in spaces along interfaces between insulating layers and the internal electrodes. Subsequently, an abrading step is performed such that the internal electrodes are sufficiently exposed at the end surfaces and an excess water-repellent agent is removed therefrom to enable plating films to be directly formed on the end surfaces.
摘要:
A method for plating electrodes of ceramic chip electronic components includes performing electroplating in a plating bath. The plating bath contains tin (II) sulfamate, acting as a tin (II) salt; a complexing agent including at least one selected from the group consisting of citric acid, gluconic acid, pyrophosphoric acid, heptoic acid, malonic acid, malic acid, salts of these acids, and gluconic lactone; and a brightener including at least one surfactant having an HLB value of about 10 or more. The tin plating adhesion of the resulting ceramic chip electronic components can be limited to a certain level.
摘要:
The invention relates to a method of trace analysis of organic compounds which calls for the steps of setting a test piece in a flow cell, and thereafter removing organic compounds from the test piece by heating it at high temperature in an oven. The compounds are concentrated in a trap tube and then removed from the trap tube and carried into a concentrating/inlet unit, such as a thermal desorption cold trap injector. In this unit, cryofocusing of the compounds is performed, and then the organic compounds are introduced into a gas chromatograph to be analyzed therein, wherein a part of the purified inert gas is caused, except during the process of trapping the organic compounds, to flow into the flow cell from the direction opposite the direction from which the gas flows along the trapping line. The invention also provides an apparatus to be used for the method, including an analyzer having a flow cell, a trap tube connected to the flow cell, a detector connected to the trap tube, and a flow rate controller connected to the flow cell. This can be brought into communication with the trap tube and is so formed as to permit a test piece, such as a wafer, to be removably set therein and also permit a carrier gas to flow therethrough. A channel for purified inert gas is provided between the flow rate controller and the flow cell and also between the flow rate controller and a valve that communicates with the flow cell.
摘要:
A gas-leak detector includes a suction pump that sucks sample gas and reference gas, two gas detection sensors, and a cell block having a cell therein. The cell receives the gasses and has two suction-gas introduction channels and a single gas discharge channel opening thereinto. The gas-leak detector detects a gas leak on the basis of outputs from the sensors. The introduction channels and the discharge channel open into the cell at a first one of opposing surfaces of the cell, the opening of the discharge channel being arranged between the openings of the two introduction channels. The sensors are on the same plane as a second one of the opposing surfaces and are arranged between the opening of the discharge channel and the openings of the introduction channels. The suction pump is arranged on the cell block and communicates with the opening of the discharge channel.