摘要:
A Sn—Ag—Cu—Bi lead-free solder which can be used for soldering of vehicle-mounted electronic circuits and which has excellent resistance to heat cycles and mechanical strength is provided. The solder contains Ag: 2.8-4 mass %, Bi: 1.5-6 mass %, Cu: 0.8-1.2 mass %, and a remainder of Sn.
摘要:
A lead-free solder alloy which can be used for soldering of vehicle-mounted electronic circuits and which exhibits high reliability is provided.The alloy consists essentially of Ag: 2.8-4 mass %, In: 3-5.5 mass %, Cu: 0.5-1.1 mass %, if necessary Bi: 0.5-3 mass %, and a remainder of Sn. In is at least partially in solid solution in the Sn matrix.
摘要:
A Sn—Ag—Cu—Bi lead-free solder which can be used for soldering of vehicle-mounted electronic circuits and which has excellent resistance to heat cycles and mechanical strength is provided. The solder consists essentially of Ag: 2.8-4 mass %, Bi: 1.5-6 mass %, Cu: 0.8-1.2 mass %, and a remainder of Sn.
摘要:
A lead-free solder alloy which can be used for soldering of vehicle-mounted electronic circuits and which exhibits high reliability is provided.The alloy consists essentially of Ag: 2.8-4 mass %, In: 3-5.5 mass %, Cu: 0.5-1.1 mass %, if necessary Bi: 0.5-3 mass %, and a remainder of Sn. In is at least partially in solid solution in the Sn matrix.
摘要:
A technology whereby removal of magnetic hysteresis is enabled in short time in parallel with a process for stage transfer, and so forth. There is executed a magnetic hysteresis removal sequence whereby current for exciting an electromagnetic coil prior to acquisition of an image is always set to a predetermined variation value against a target value, thereby obtaining information on an image, and so forth, when a diameter of a primary electron beam, converged on the specimen, becomes smaller than dimensions displayed by one pixel of an image to be acquired.
摘要:
A fiber treatment agent contains components (a) and (b). A fiber treated with the fiber treatment agent and a fiber fabric including the fiber are also provided. The component (a) an insoluble egg-shell membrane fine powder with a mean particle size of 0.1 to 10 μm while the component (b) is a synthetic resin emulsion or a synthetic resin solution.
摘要:
A detecting-element assembly (40) is configured such that a piezoelectric element (51) is housed in a casing body portion (43) of a casing (42), and is attached to a housing portion (22) of a flow path formation member (20) via a flange portion (41). Therefore, the path between the piezoelectric element (51) and the position of attachment of the detecting-element assembly (40) is elongated, whereby ultrasonic waves which leak into the interior of the detecting-element assembly (40) from the piezoelectric element (51) become unlikely to reflectively return from a joint. Thus, the influence of, for example, noise stemming from reflected waves is reduced, thereby enhancing the accuracy of detection. An average clearance of 1 millimeter or more is provided along the outer circumferential surface of the casing body portion (43) of the detecting-element assembly (40), whereby a problem of collected foreign matter is unlikely to occur.
摘要:
An electron beam inspection apparatus in which the order of inspection is determined to shorten the inspection time is disclosed. The order of inspection is determined by minimizing the total of the moving time and the inspection time as well as by simply optimizing the covered distance. At the time of preparing a recipe to determine the inspection points and the order of inspection, the sequence of a series of inspection points sequentially inspected is changed to optimize the order of inspection. Not only the sequence which minimizes the covered distance is determined but also the order of inspection of the inspection points is optimized in accordance with the charged state, warping of the wafer, the delivery position and other situations.
摘要:
A gas concentration sensor includes a measurement chamber for measuring a concentration of a specific gas component in a gas under measurement; an inflow path for allowing inflow of the gas under measurement thereinto and an outflow path for allowing outflow of the gas under measurement therefrom; a reflection wall for reflecting an acoustic wave; and an acoustic wave transmitting-receiving element having a transmitting-receiving surface adapted to transmit an acoustic wave toward the reflection wall and receive an acoustic wave reflected from the reflection wall. The concentration of the specific gas in the gas under measurement is detected on the basis of a propagation time between transmission of the acoustic wave and reception of the reflected acoustic wave. When a predetermined member having the sensor attached thereto is placed in a horizontal plane, the transmitting-receiving surface faces downward. A recess is formed in a peripheral portion of the reflection wall. The recess is receded toward a back surface of the reflection wall, namely, in a direction away from the transmitting-receiving surface.