摘要:
An oxide catalyst composition for use in producing methacrolein or a mixture of methacrolein and methacrylic acid, wherein the oxide catalyst composition is represented by the formula (MO+W)l2BiaAbBcFedXeSbfOg, wherein: A is at least one member selected from the group consisting of Y and the elements of the lanthanoid series exclusive of Pm; B is at least one member selected from the group consisting of K, Rb and Cs; X is Co solely, or a mixture of Co and at least one member selected from the group consisting of Mg and Ni; and a, b, c, d, e, f and g are, respectively, the atomic ratios of Bi, A, B, Fe, X, Sb and O, relative to twelve atoms of the total of Mo and W, wherein the atomic ratios (a to f) of the elements and the relationship between the amounts of the elements are chosen so as to satisfy specific requirements.
摘要:
A magnetic head assembly equipped with a slider and a gimbal spring to which the slider is secured with an adhesive agent. According to one aspect, at least one slit is formed in the gimbal spring opposing the adhesion surface of the slider, so that expansion and contraction of the gimbal spring caused by a change in the temperature is hardly transferred to the slider. According to a second aspect, the Young's modulus after hardening of the adhesive agent applied onto thee adhesion surface of the slider is selected to be smaller than about {fraction (1/13000)} of the Young's modulus of the slider material or of the gimbal spring material. According to the first aspect, therefore, the area of the gimbal spring on which the adhesive agent is applied is limited by the slit. According to the second aspect, the Young's modulus of the adhesive agent after hardening is so small that the warping amount of the slider caused by a change in the temperature lies within a predetermined range. The warping amount of the slider in the magnetic head assembly is hence suppressed to lie within an allowable range despite a change in the temperature, and floating performance of thee slider is stabilized.
摘要:
The via contact structure is rendered into a dual damascene type via contact structure having a wide groove and a via contact hole lying below the wide groove, and the interior of the lower via contact hole is filled up with a filling material composed of tungsten, while, the interior of the upper groove is filled up with aluminum. Since the interior of the lower via contact hole is thus filled up with a filling material comprising tungsten, aluminum which has a low reflowability may be used only in the upper groove. As for the filling material for filling up the wide groove, the wide groove can be filled up sufficiently well even with aluminum which is not high in reflowability. By combining the filling of the via contact hole with tungsten and the filling of the groove with aluminum as mentioned above, a via contact filling with a high aspect ratio can be realized. Further, the problem or drawback that, at the time of forming the second metal wiring layer, the first metal wiring layer may be melted due to the high-temperature heat treatment performed for depositing the metal material is eliminated, and thus, it becomes possible to realize a dual damascene type via contact structure which can be applied to a multi-layer wiring structure.
摘要:
A ceramic electronic component includes at least one component body having two end faces opposing each other and side faces connecting the two end faces, and terminal electrodes formed on the component body. Each of the terminal electrodes extends from each end face to edge portions of each side face of the component body. Each of the terminal electrodes includes a metal layer formed on at least each end face of the component body, a conductive resin layer for covering at least portions of the side faces of the component body, and a metal plating film covering the outer surface of the terminal electrode. The conductive resin layer extends from the metal layer including the edge of the metal layer to the portions of the side faces, and includes a conductive resin containing metal powder and resin. The thickness of the conductive resin layer above the side faces is at least about 10 &mgr;m.
摘要:
A suspension adapted to be mounted on an actuator arm and elastically support a head slider having a head includes a base portion configured and adapted to be mounted to an end of the actuator arm. Also included is a head slider mounting portion adapted to support the head slider. The head slider mounting portion is located at an opposite end of the suspension from the base portion. A tongue portion extends from the base portion in a direction perpendicular to a surface of the base portion, and a head IC chip mounting portion is formed on the tongue portion. The head IC chip mounting portion is configured and arranged to support a head IC chip thereon.
摘要:
A program for rewriting data in an address region B is written in an address region A which can be rewritten by an external PROM writer. After resetting the microcomputer and rewriting the program in address region A, the reset state is cancelled and the last address in address region A of the EEPROM (1) is then stored in a register (17). An address detector (18) prohibits rewriting in address region A based on an address value stored in the register (17).
摘要:
When data are to be written in an EEPROM (1), a CPU (2) sets a flag (12). A voltage booster (13) boosts the power voltage in compliance with the setting of the flag (12). A voltage boost detector (14) detects whether the output of the voltage booster (13) is in voltage boost state. If the output of the voltage booster (13) is not in voltage boost state, a latch (15) is reset and the EEPROM (1) is not permitted to switch to write mode. As a result, it is possible to prevent incorrect data writing in the EEPROM (1) even when the flag (12) has been incorrectly set.
摘要:
An adaptor device for connecting a sheathed heater with a power supply terminal wherein an end of a heater wire of the sheathed heater and an end of a lead wire are inserted into an adaptor sleeve and the ends of the heater wire and the lead wire in the adaptor sleeve are connected by a flexible wire. The flexible wire is a stranded wire or in the form of a wave.
摘要:
A surface acoustic wave device achieving improved insertion loss and fraction defective without lowering the TTE level includes an IDT electrode located on a piezoelectric substrate. The IDT electrode includes a solid electrode portion and a split electrode portion continuously formed at an end of the solid electrode portion in the propagating direction of a surface acoustic wave and having an electrode finger width of about .lambda./8 wherein .lambda. is the wavelength of the surface acoustic wave.
摘要:
A portable wordprocessor has a main body and a display support assembly hinged to the main body. The main body has an information entry keyboard, a function keyboard, a control circuit board and a floppy disk drive. The information entry keyboard and the function keyboard have key tops the heights of which do not exceed the height of the portion of the main body which accommodates the floppy disk drive. The information entry keyboard is disposed along the front edge of the main body, while the function keyboard is disposed between the information entry keyboard and the rear edge of the main body. The floppy disk drive is disposed in lateral alignment with the function keyboard. The display support assembly supports a liquid crystal display device which includes a liquid crystal display portion and a liquid crystal control circuit board which is disposed around the liquid crystal display portion and has a thickness which does not exceed the thickness of the liquid crystal display portion.