摘要:
In a damping force control type hydraulic shock absorber, the flow path area of a port is changed by moving a spool according to an electric current supplied to an actuator, and thus the flow path area of a passage between cylinder upper and lower chambers is directly changed, thereby controlling orifice characteristics. Moreover, the pressure in a pilot chamber is changed according to the resulting pressure loss so as to change the valve opening pressure of a disk valve, thereby controlling valve characteristics. This enables the damping force characteristic control range to be widened. The pilot chamber is formed by the side wall of a valve member, the disk valve, a seal disk, and a seal member, also, the seal member has no sliding portion. It is therefore possible to minimize the leakage of hydraulic fluid and to obtain stable damping force characteristics. It is also possible to minimize variations in damping force with temperature changes.
摘要:
According to the present invention, a method for producing a semiconductor device in which an active region made of a crystalline silicon film is formed on an insulating surface of a substrate is provided. The method includes the steps of: forming a first amorphous silicon film on the substrate; selectively introducing at least one kind of catalyst elements for promoting the crystallization of the first amorphous silicon film into a part of the first amorphous silicon film before or after forming the first amorphous silicon film; heating the first amorphous silicon film so as to crystallize the first amorphous silicon film in a direction substantially parallel to a surface of the substrate with respect to a region surrounding a region into which the catalyst elements are selectively introduced; forming an insulating thin film in a region on the crystalline silicon film in which crystals are grown in a direction substantially parallel to the surface of the substrate so as to partially remove the insulating thin film and the crystalline silicon film so that a linear boundary is formed along a crystal-growing direction of the crystalline silicon film; forming a second amorphous silicon film on the crystalline silicon film; and crystallizing the second amorphous silicon film by heating or by irradiating a laser beam or an intense light.
摘要:
Into an amorphous silicon film, catalyst elements for accelerating the crystallization are introduced. After patterning the amorphous silicon films in which the catalyst elements have been introduced into an island pattern, a heat treatment for the crystallization is conducted. Thus, the introduced catalyst elements efficiently diffuse only inside the island-patterned amorphous silicon films. As a result, a high-quality crystalline silicon film, having the crystal growth direction aligned in one direction and having no grain boundaries, is obtained. Using the thus formed crystalline silicon film, semiconductor devices having a high performance and stable characteristics are fabricated efficiently over the entire substrate, irrespective of the size of the devices.
摘要:
A suspension system includes a shock absorber body, a piston rod that projects upwardly from the upper end of the shock absorber body, and a mount that is provided on the projecting end portion of the piston rod to attach the projecting end portion to a vehicle body. The mount includes a first mounting member that is attached to the piston rod, a second mounting member that is attached to the vehicle body, and a rubber mount member that is provided between the first and second mounting members. The rubber mount member has a pair of thick- and thin-walled diametrically opposing portions. The suspension system further includes engagement members to which a retainer is disengageably attached to retain the thick-walled portion of the rubber mount member in a compressed state.
摘要:
A hydraulic damper and air spring unit of the type including a hydraulic damper main body provided with a piston rod slidingly projecting upwards therefrom, a tubular member with the lower end thereof being secured to the outer periphery of the main body and the upper end extending upwards around the main body, and a rolling rubber member being provided between the upper end of the tubular member and a shell secured to the upper end of the piston rod to define an air chamber surrounding the piston rod and the upper portion of the main body. The tubular member includes an annular spacer with one end being sealingly secured to the outer periphery of the damper main body and having an annular shoulder at the other end, and a piston member having on one end a retaining portion which is engageable with the shoulder on the spacer and further having a tubular portion surrounding the upper portion of the damper main body with a spaced relationship and connected to the rubber member, the retaining portion being sealingly connected to the shoulder, whereby the reliability of welding is improved.
摘要:
A method is provided for assembling a combination shock absorber and air spring including a tubular shock absorber having an outer tube and a piston rod reciprocably projecting from one end of the outer tube, and an air spring consisting of a resilient diaphragm member having an outer wall portion connected to a cylindrical housing secured to the projecting end of the piston rod, an inner concentric wall portion secured to the outer tube, and a rolling wall portion formed between the inner and outer wall portions. The method comprises the steps of expanding radially outwardly and rolling back one end portion of a tubular resilient diaphragm member to form the outer wall portion and the rolling wall portion, fitting a retaining ring on the inner surface of the outer wall portion, fitting the tubular resilient diaphragm member on the outer tube of the shock absorber and securing the other end portion of the diaphragm member thereto, and securing the outer wall portion of the cylindrical housing by utilizing the retaining ring.