Abstract: A PTFE sheet in which PTFE fibers having a diameter of 1 ?m or less are spun, the PTFE sheet having a Gurley value in the range of 1 s/100 cc/in2 to 3 s/100 cc/in2 and a shrinkage factor in a direction orthogonal to a sheet winding direction of no more than 10% when heated to 300° C. The PTFE sheet makes a die adsorbable via a tool, which is for heating the die when the die is mounted on a mounting body, by being sandwiched between the die and the tool, and suppresses the adhesion, to an adsorption surface of the tool or to the die, of an adhesion member for fixing the die to the mounted body. Through this configuration, a PTFE sheet capable of stabilizing vacuum adsorption and improving maintainability and a method for mounting a die are provided.

Abstract: A method of mounting a die includes: preparing a die having a bump formation surface on which a plurality of bump electrodes are formed; disposing a vacuum suction tool having a suction surface above the die such that the suction surface faces toward the bump formation surface; sandwiching a porous sheet between the suction surface and the bump formation surface and suctioning the die by the vacuum suction tool; and mounting the die that has been suctioned by the vacuum suction tool in a bonding region of a substrate with an adhesive material interposed therebetween, the porous sheet having a thickness equal to or greater than the protrusion height of the bump electrodes on the bump formation surface. Stabilization and ease of maintenance of vacuum suction can thereby be improved.

Abstract: A method of mounting a die includes: preparing a die having a bump formation surface on which a plurality of bump electrodes are formed; disposing a vacuum suction tool having a suction surface above the die such that the suction surface faces toward the bump formation surface; sandwiching a porous sheet between the suction surface and the bump formation surface and suctioning the die by the vacuum suction tool; and mounting the die that has been suctioned by the vacuum suction tool in a bonding region of a substrate with an adhesive material interposed therebetween, the porous sheet having a thickness equal to or greater than the protrusion height of the bump electrodes on the bump formation surface. Stabilization and ease of maintenance of vacuum suction can thereby be improved.

Abstract: A PTFE sheet in which PTFE fibers having a diameter of 1 ?m or less are spun, the PTFE sheet having a Gurley value in the range of 1 s/100 cc/in2 to 3 s/100 cc/in2 and a shrinkage factor in a direction orthogonal to a sheet winding direction of no more than 10% when heated to 300° C. The PTFE sheet makes a die adsorbable via a tool, which is for heating the die when the die is mounted on a mounting body, by being sandwiched between the die and the tool, and suppresses the adhesion, to an adsorption surface of the tool or to the die, of an adhesion member for fixing the die to the mounted body. Through this configuration, a PTFE sheet capable of stabilizing vacuum adsorption and improving maintainability and a method for mounting a die are provided.

Abstract: (Problem) The invention is to provide to a solenoid valve drive control device, in which though the magnetic path is normally composed (i.e. the plunger is attached to the attracting member), it is never determined by mistake as the dropout, and it is never entered into the reabsorption mode of the plunger. (Resolution Approach) The invention is a solenoid valve drive control device of the invention, in which by controlling of the zero cross timing generation device 72, after application of the electric current to the solenoid 66 is started at zero cross timing by the switching device 68, when the current value that flows to the solenoid 66 detected by the electric current sensing device 78 reaches the circuit protection electric current value Ic (?A), a stabilization mode that repeats the ON-OFF cycle plural times (four times of the total in the Embodiment of FIG. 4), in which application of the electric current to the solenoid 66 is interrupted by the switching means 84, is operated (see A5-A8 in FIG. 4).

Abstract: (Problem) The invention is to provide to a solenoid valve drive control device, in which though the magnetic path is normally composed (i.e. the plunger is attached to the attracting member), it is never determined by mistake as the dropout, and it is never entered into the reabsorption mode of the plunger. (Resolution Approach) The invention is a solenoid valve drive control device of the invention, in which by controlling of the zero cross timing generation device 72, after application of the electric current to the solenoid 66 is started at zero cross timing by the switching device 68, when the current value that flows to the solenoid 66 detected by the electric current sensing device 78 reaches the circuit protection electric current value Ic (?A), a stabilization mode that repeats the ON-OFF cycle plural times (four times of the total in the Embodiment of FIG. 4), in which application of the electric current to the solenoid 66 is interrupted by the switching means 84, is operated (see A5-A8 in FIG. 4).

Abstract: A solenoid valve drive control device includes a switching device that provides and interrupts the application of the electric current to the solenoid, a first device that controls the application of the electric current to the solenoid by the switching device to start the application of the electric current to the solenoid at zero cross timing in a power supply period, and a second device that detects a value of an electric current that flows to the solenoid. The application of the electric current to the solenoid is interrupted when the detected value of the electric current reaches a predetermined value, after the zero cross timing. A holding power is generated by discharging energy accumulated in the solenoid through a snubber circuit until another zero cross timing subsequent to the zero cross timing after the application of the electric current to the solenoid is interrupted.

Abstract: (problem) The invention is to provide to a solenoid valve drive control device and a solenoid valve comprising the solenoid valve drive control device, in which the generation of the noise that originates in inrush current can be controlled by reducing inrush current to the stray capacity of the coil, and accumulating energy in the coil, and in which the energy conservation can be attained.

Abstract: When a main body of a sensor chip (1) is in a grounded state, a shield layer (71) constituting a shield electrode formed on a circuit layer (72) is grounded through a resistor (46).

Abstract: The invention provides a compact and easily movable workpiece stacking apparatus which uses only an electric source as a power source. A workpiece stacking apparatus includes lift bars on which workpieces are stackable and a lift bar drive apparatus which drives the lift bars in the upward and downward directions. The lift bar drive apparatus includes a support pillar which guides the lift bars in the upward and downward directions, a first sprocket, a second sprocket disposed below the first sprocket and guided movably in the upward and downward directions, a roller chain of which one end is fixed to the lift bars and extended from the lift bars to be engaged with the teeth of the first and second sprockets and the other end is fixed so as to hang the second sprocket, and an electric motor which drives and rotates the first sprocket.

Abstract: When a main body of a sensor chip (1) is in a grounded state, a shield layer (71) constituting a shield electrode formed on a circuit layer (72) is grounded through a resistor (46).

Abstract: A process for forming a tubular member is provided which includes a pre-forming process for tube-expanding (bulge) forming and bending forming a tubular material using first and second molds and a final forming process for crush forming a preformed tube using a third mold so as to give its cross section a desired shape, the pre-forming step being carried out using the first and second molds heated at temperatures equal to or higher than the recrystallization temperature of the tubular material and the final forming step being carried out using the third mold heated at temperatures equal to or lower than the recrystallization temperature of the tubular material. The process enables a tubular material of aluminum alloy to be formed into a tubular member of high precision and high quality which has expanded portions as well as bent portions and whose cross section varies across its length.

Abstract: A process is provided for producing a hollow member having a wall thickness, in a cross section orthogonal to the longitudinal direction, that varies in the longitudinal direction, the process including a heating step of heating a tubular material (Pa) so that the tubular material (Pa) is given a temperature variation in the longitudinal direction, and a stretching step of axially stretching the tubular material (Pa) that has been heated in the preceding step. In this way, a hollow member having a cross-sectional wall thickness that is variable in the longitudinal direction can be easily produced.

Abstract: A process is provided for producing a hollow member having a wall thickness, in a cross section orthogonal to the longitudinal direction, that varies in the longitudinal direction, the process including a heating step of heating a tubular material (Pa) so that the tubular material (Pa) is given a temperature variation in the longitudinal direction, and a stretching step of axially stretching the tubular material (Pa) that has been heated in the preceding step. In this way, a hollow member having a cross-sectional wall thickness that is variable in the longitudinal direction can be easily produced.

Abstract: A process for forming a tubular member is provided which includes a preforming process for tube-expanding (bulge) forming and bending forming a tubular material (Pa) using first and second molds (M1, M2) and a final forming process for crush forming a preformed tube (Pc) using a third mold (M3) so as to give its cross section a desired shape, the preforming being carried out using the first and second molds (M1, M2) heated at temperatures equal to or higher than the recrystallization temperature of the tubular material and the final forming being carried out using the third mold (M3) heated at temperatures equal to or lower than the recrystallization temperature of the tubular material. The process enables a tubular material of aluminium alloy to be formed into a tubular member of high precision and high quality which has expanded portions as well as bent portions and whose cross section varies across its length. The process also enables drastic increase in productivity.