摘要:
Engine driving characteristics are achieved for driving a hydraulic system during non-traveling and traveling in an electrically driven dump truck.When a shift lever 16 is located at a neutral position, the target revolution speed Nr1 corresponding to the operation amount (p) of an accelerator pedal 1 is calculated on the basis of first target revolution speed characteristics (Nr1(p)) which are suitable for driving of a hydraulic pump for working so that an electronic governor 4a is controlled on the basis of this target revolution speed. When the shift lever 16 is located at a forward position, the target revolution speed Nr2 corresponding to the operation amount of the accelerator pedal 1 is calculated on the basis of second target revolution speed characteristics (Nr2(p)) which are suitable for driving of electric motors 12R, 12L so that the electronic governor 4a is controlled on the basis of this target revolution speed.
摘要:
Conductive ink is printed onto a wafer held on a vertically movable stage by using a squeegee to force the conductive ink through a stencil. The stencil is supported from below by a supporting member adjacent to the periphery of the stage. After the conductive ink has been printed through the stencil, pneumatic pressure is applied to the stencil from above, and the stage is lowered to separate the wafer from the stencil. The supporting member holds the stencil taut while the stage is being lowered, so that the stencil does not warp downward and the printed conductive ink leaves the stencil at substantially the same time at all points on the wafer surface, preventing the premature escape of air and loss of pneumatic pressure.
摘要:
A grinding machine for grinding a workpiece, including a chucking table having a chucking area and a grinder head. The grinder head includes a spinning disk rotating about a rotation axis and a plurality of grindstones, which are circularly arranged on a surface of the spinning disk, whereby a slit is created between the adjacent grindstones, wherein both of the adjacent grindstones is arranged to make contact with an edge of the workpiece while grinding the workpiece.
摘要:
A junction structure, and a semiconductor device including the same, for a junction of a terminal pad and solder, including an underlying base on which said terminal pad is formed; a nickel layer disposed on the terminal pad; a palladium layer or a gold layer disposed on the nickel layer; the solder; and a zinc system material layer provided between the palladium layer or the gold layer and the solder. The terminal pad and the solder may be provided in a semiconductor device in which the terminal pad lies inside the semiconductor device, and the zinc system material layer is formed between the terminal pad and the solder. The terminal pad may be provided over a substrate, the solder may be provided in the semiconductor device, and the zinc system material layer is then formed between the terminal pad of the substrate and the solder of the semiconductor device.
摘要:
A resin sealed semiconductor device includes a semiconductor chip having a main surface, a plurality of surface electrodes formed on the main surface of the chip, a plurality of projection electrodes formed the main surface, each projection electrode being connected to respective one surface electrodes, and a resin shield covering the main surface, the surface electrodes and side surfaces of the projection electrodes, the resin having a thermal expansion coefficient in the range of 8-10 ppm/° C. and a Young's modulus in the range of 1.8-2.0 Gpa.
摘要:
A clamp device for mounting elongated components such as pipes on a support such as a car body comprises a first clamp to be mounted on the support and a second clamp to be mounted in a recess in the first clamp. The clamp device is constructed to permit limited transverse movement of the second clamp in the recess, to accommodate bending or curving of elongated components held by the second clamp. The first clamp may also hold elongated components.
摘要:
Process for producing a high-density printed wiring board, comprising: providing an ultrathin-copper-foil-clad board having a hole and outermost copper foil thickness of 5 μm or less, plating the surface by electroless copper plating to form a layer of 0.1 to 1 μm thickness, forming an electrolytic copper plating layer of 0.5 to 3 μm thickness using the electroless copper plating layer as electrode, forming a plating resist layer on a portion of the copper plating layer, forming a pattern copper plating layer of 6 to 30 μm thickness on the copper surface in where the plating resist layer is not formed, by electrolytic plating, removing the plating resist layer, and etching the entire surface to remove the thin electrolytic copper layer, the electroless copper layer and ultrathin copper foil layer at least where the pattern copper plating layer is not formed.