Abstract:
A single core optical fiber cord having an outer diameter of 1.2 mm or less, and having a structure in which an optical fiber core wire having a resin coating provided at the center, a tensile-strength-fiber layer around the periphery of the optical fiber core wire, and a coating layer around the outer periphery of the tensile-strength-fiber layer is provided. The coating layer can be composed of a non-halogen fire-retardant resin. The optical fiber cord has excellent fire retardant, mechanical and handling properties, although the outer diameter thereof is 1.2 mm or less.
Abstract:
A polishing plant includes a polishing apparatus having a top ring for holding a workpiece and a turn table for polishing a surface of the workpiece held by the top ring. A cleaning apparatus has cleaning machines for cleaning the workpiece polished by the polishing apparatus. At least one drainage pipe connected to the polishing apparatus discharges a waste liquid from the polishing apparatus, and at least one drainage pipe connected to the cleaning apparatus to discharges a waste liquid from the cleaning apparatus are provided as separate plural of drainage pipe lines, depending on the type of waste liquid. By use of the polishing plant of the present invention, treatment waste liquids can be efficiently conducted.
Abstract:
A polishing apparatus is used for polishing a workpiece such as a semiconductor wafer to a flat mirror finish. The polishing apparatus includes a turntable having a polishing surface thereon, and a top ring for holding a workpiece to be polished and pressing the workpiece against the polishing surface on the turntable. A pusher is disposed in a position for transferring the workpiece to and from the top ring, and has a workpiece support which can be lifted to a position close to the top ring for transferring the workpiece to and from the top ring. When the workpiece support receives a polished workpiece and is lowered, a cleaning liquid is ejected substantially simultaneously from three cleaning nozzle units that are disposed in respective three positions to clean the upper and lower surfaces of the workpiece and the lower surface of the top ring.
Abstract:
A polishing apparatus is used for polishing a workpiece such as a semiconductor wafer to a flat mirror finish. The polishing apparatus includes an enclosing structure having an outer wall and at least one door, a polishing section enclosed by the enclosing structure for polishing a surface of a workpiece by holding the workpiece and pressing the workpiece against a polishing surface of a turntable, a sensor for detecting an opening or closing of the door, and an exhaust system for exhausting ambient air from an interior of the enclosing structure. The polishing apparatus further includes an adjusting mechanism for adjusting an amount of air which is exhausted from the interior of the enclosing structure. The amount of air exhausted from the interior of the enclosing structure is reduced by the adjusting mechanism when the door is closed, and the amount of air exhausted from the interior of the enclosing structure is increased by the adjusting mechanism when the door is opened.
Abstract:
A robotic transport apparatus is capable of providing an effective waterproofing function of working components without using mechanical seals. The robotic transport apparatus includes a robot body, an arm assembly extendably attached to the robot body, and a workpiece holding section attached to the arm assembly. A pan member for waterproofing of the robot body is provided between the workpiece holding section and the robot body and has an area not smaller than the workpiece holding section.
Abstract:
The present invention provides a dry/wet work turning-over machine which can be used with both a dry hand and a wet hand and in which, even when the dry hand having a vacuum suction mechanism is inserted into a water-proof cover surrounding a work turning-over device, liquid is not adhered to the hand. In the dry/wet work turning-over machine, the work turning-over device is surrounded by the water-proof cover. An opening is formed in the water-proof cover at an upper surface of a front side thereof and a front part of an upper surface thereof. A screen for closing the opening is attached to the opening. The screen is rotated in a downward direction by a rotation driving mechanism.
Abstract:
A polishing method for reducing an amount of polishing liquid used without lowering a polishing rate is provided. The polishing method comprises determining, in advance, the relationship between a supply flow rate of a polishing liquid and a polishing rate at the time the substrate is polished without controlling a surface temperature of the polishing pad, and the relationship between a supply flow rate of a polishing liquid and a polishing rate at the time the substrate is polished while controlling a surface temperature of the polishing pad at a predetermined level, and continuously supplying the polishing liquid to the surface of the polishing pad to achieve a higher polishing rate when the substrate is polished while controlling the surface temperature of the polishing pad at the predetermined level, than when the substrate is polished without controlling the surface temperature of the polishing pad.
Abstract:
A polishing method that carries out a multi-step polishing process with improved polishing conditions (polishing recipe) while omitting measurement of the surface conditions of a substrate, as carried out between polishing steps thereby increasing the throughput. The polishing method for polishing workpieces by repeating the sequential operations of taking a workpiece out of a cassette in which a plurality of workpieces are stored, carrying out multi-step polishing of a surface of the workpiece and returning the workpiece to the cassette, includes carrying out one of the following two polishing processes for the workpiece taken out of the cassette: a first polishing process comprising carrying out the multi-step polishing under preset conditions and measurement of the surface of the workpiece before and after each polishing step; and a second polishing process comprising carrying out a predetermined step of the multi-step polishing under polishing conditions which have been modified based on the results of the measurement.
Abstract:
A polishing method can bring a polishing surface to the optimum condition for polishing, without using a dummy wafer, before resuming polishing, thereby eliminating the cost of dummy wafer. The polishing method includes carrying out a stand-by operation during a polishing-resting time period, carrying out a preparatory process to polishing, after completion of the stand-by operation, by dressing a polishing surface while supplying a polishing liquid to the polishing surface, and starting polishing of a workpiece after completion of the preparatory process to polishing. A determination as to whether to carry out the preparatory process to polishing after completion of the stand-by operation may be made based on the total operating time of the stand-by operation or the total effective number of the stand-by operations.
Abstract:
A polishing apparatus is used for polishing a workpiece such as a semiconductor wafer to a flat mirror finish. The polishing apparatus, includes a turntable having a polishing surface thereon, and a top ring for holding a workpiece to be polished and pressing the workpiece against the polishing surface on the turntable. A pusher is disposed in a position for transferring the workpiece to and from the top ring, and has a workpiece support which can be lifted to a position close to the top ring for transferring the workpiece to and from the top ring. When the workpiece support receives a polished workpiece and is lowered, a cleaning liquid is ejected substantially simultaneously from three cleaning nozzle units that are disposed in respective three positions to clean the upper and lower surfaces of the workpiece and the lower surface of the top ring.