67results about How to "Accurate polishing" patented technology

Provided is a polishing pad comprising a fiber including organic fiber and a matrix resin holding the fiber, wherein at least the organic fiber is exposed on the work material-side surface thereof at least after dressing. The polishing pad suppresses generation of minute polishing scratches on the work material and allows flat polishing at low load. It in also possible to manage the polishing end point of the work material without generation of polishing scratch with its optical detection system monitoring the polishing state of work material. Thus, for example, it is possible to polish substrates under a small load on the interlayer insulating film and give products superior in flatness in semiconductor device manufacturing processes and thus, the polishing pad according to the invention may be used easily in the next-generation dual damascene method.

A thickness of a wafer during polishing operation is detected to accurately perform the polishing. A thickness measuring method, which measures the thickness of the wafer of wafer 7 in polishing a surface, comprises the steps of irradiating the thin film-like material during the surface polishing from a backside with probe light, measuring a reflectance spectrum with a dispersion type multi-channel spectroscope using a photodiode array which has particularly high sensitivity to light having a wavelength ranging from 1 to 2.4 μm, and calculating the thickness on the basis of a wave form of the reflectance spectrum. The surface polishing is performed while the thickness of the wafer 7 is measured by the above-described thickness measuring method, and the polishing is finished when the thickness of the wafer 7 reaches a target thickness.

The double-side polishing apparatus for polishing both faces of a wafer is capable of reliably measuring not only a thickness of an outer part of the wafer but also a thickness of a center part thereof. The double-side polishing apparatus comprises: a lower polishing plate; an upper polishing plate held by a frame; and a carrier having a through-hole for holding the wafer. A window section, through which a laser beam passes, is formed in a part of the upper polishing plate, under which the wafer held by the carrier passes. An optical thickness measuring equipment is provided to a part of the frame, under which the window section passes while the upper polishing plate is rotated. The thickness measuring equipment emits the laser beam through the window section, receives reflected beams reflected from an upper face and a lower face of the wafer, and calculates the thickness of the wafer on the basis of peak values of the reflected beams.

A method for polishing a thin film formed on a substrate includes planarizing a thin film formed on a reference substrate by a CMP process such that the thin film remains on the reference substrate. After the planarizing, the thin film is cleaned, and then values of Δ and Ψ with respect to the cleaned thin film are measured by ellipsometry. A physical property of the thin film is determined based on the Δ and Ψ which have been measured by ellipsometry, and a polishing condition for an other substrate having a thin film to be polished is set based on physical property data which are obtained by the determining of the physical property.

A polishing slurry for semiconductor planarization containing cerium oxide particles and water, wherein the content of the cerium oxide particles having a diameter of 3 μm or more is 500 ppm or less (weight ratio) in a solid, preferably 100 ppm or less and it is more preferable that D99 (99% by volume of the whole particles in polishing slurry) of the cerium oxide particles is 1 μm or less. The polishing slurry can reduce the generation of scratches, and can polish a surface of the semiconductor substrate in the wiring formation process of semiconductor device precisely at a high speed.

A method for producing an α-alumina powder is described. The method for producing an α-alumina powder comprises a step of calcining an aluminum salt in the presence of a seed crystal at 600-890° C.

A polishing system based on a non-Newtonian fluid and a polishing method thereof are provided. The polishing system includes a polishing device, a non-Newtonian fluid auxiliary device and a control device. The polishing device is able to move a work piece in a polishing container containing the non-Newtonian fluid with abrasives that cause the polishing action. The non-Newtonian fluid auxiliary device is able to manipulate the viscosity of the non-Newtonian fluid by varying the pressure, speed, vibration or ultrasonic frequency, which causes the abrasives to polish the work piece. The control device is used to optimize the polishing process by controlling how the polishing device moves the work piece inside the polishing container. In this way, by using the polishing method, the polishing system provided is able to polish a work piece with any three-dimensional shape.

A polishing head includes a head body, a first recessed portion formed in the lower surface of the head body, a support plate which can be moved up and down in the first recessed portion, a first film-like member in which a first space is formed between the upper surface of the support plate and the head body, a second recessed portion formed in a lower surface of the support plate, a second film-like member, in which a second space is formed between the second film-like member and the support plate, and which holds a wafer on the lower, a communicating hole which is formed in the support plate to communicate the first space with the second space, and a gas supply device which increases pressures in the first and second spaces with a fluid to equal pressures to bring the object into press contact with the polishing pad.

The invention relates to a polishing robot used for the external surface of an iron pan. The polishing robot comprises a rotating mechanism, a polishing mechanism, an adjusting mechanism and a control system. The rotating mechanism comprises a rotating platform and a rotating shaft. The upper end of the rotating shaft extends out of the rotating platform, and fixing rods are arranged on the rotating shaft in a radiation mode. Suction cups are arranged at the ends of the corresponding fixing rods. The rotating shaft and the fixing rods are both hollow. The polishing mechanism is arranged above the rotating mechanism and comprises a polishing wheel, an oscillating rod and a supporting frame. A rail is vertically arranged in the supporting frame. A sliding block is arranged between the two side walls of the rail in a sliding mode. One end of the oscillating rod penetrates into the sliding block, and the other end of the oscillating rod is provided with the polishing wheel. The oscillating rod can adjust the position of the polishing wheel through the adjusting mechanism, so that the polishing wheel is attached to the external surface of a pan blank to be polished and is further matched with the rotating mechanism to achieve polishing. Due to arrangement of the polishing mechanism, the adjusting mechanism and the rotating mechanism, the polishing robot is simple in structure, reasonable in design, convenient to use, and capable of saving manpower and material resources, improving production efficiency and reducing enterprise cost.

A polishing method includes: rotating a polishing table that supports a polishing pad; polishing a conductive film by pressing a substrate having the conductive film against the polishing pad; obtaining a film thickness signal with use of an eddy current film-thickness sensor disposed in the polishing table; determining a thickness of the polishing pad based on the film thickness signal; determining a polishing rate of the conductive film corresponding to the determined thickness of the polishing pad; calculating an expected amount of polishing of the conductive film to be polished at the determined polishing rate for a predetermined polishing time; calculating a temporary end-point film thickness by adding the expected amount of polishing to a target thickness; and terminating polishing of the conductive film when the predetermined polishing time has elapsed from a point of time when the thickness of the conductive film has reached the temporary end-point film thickness.

The present disclosure relates to a contiguous compression wire sprang polishing apparatus that continuously polishes end surfaces of compression wise springs (10) by upper and lower chain conveyers 100 and 200 and grinding units 300. The apparatus includes: two gaming units (300) each having a grindstone (350) to which rotational force of a motor (240) is transmitted through a gear box (260), the motor (240) having a rotary shaft being located above a central axis of the grindstone (350), and the two grinding units (300) being installed to be parallel and opposite to each other at opposite sides of a compression wire spring (10) fixed to the continuous compression wire spring polishing apparatus so as to polish opposite end surfaces of the compression wire spring (10); two hinge shafts (140), which are fixed at positions, which are spaced apart from grindstones in the lowest surface of the grinding units (300) by a predetermined distance, and which are inserted into and coupled to bearings, which are fixed to a body of the polishing apparatus; an upper guide (225) configured to prevent the compression wire spring (10) from springing out and a rod end fixing shaft (150) fixed to an end of the cylinder rod (170) of the pneumatic cylinder (180) inserted into and coupled to a bearing fixed at a position between the grindstone rotation shaft and the hinge shaft (140) in each of the grinding units (300). The grindstone rotation shaft of each of the grinding units (300) is turned into the vertical state or the horizontal state according to the forward and backward movements of the pneumatic cylinder (180), so that the two grindstones (350) of the grinding units (300), which are mounted to be parallel and opposite to each other, can be easily replaced.

The invention discloses a piece of bridge construction equipment. The equipment comprises a frame body, wherein a polishing chamber is disposed in the frame body; a first slide connection groove is formed in the left side of the top part inside the polishing chamber; a second slide connection groove is formed in the right side of the polishing chamber; an opened end of which the left end is connected to the polishing chamber is disposed on the frame body right side under the second slide connection groove; a connection and fixation device and a sunken groove are disposed on the left side and the right side of the bottom inside the polishing chamber respectively; a first screwed rod which is disposed in a horizontally stretching manner is disposed in the first slide connection groove; a slide connection block of which the bottom penetrates the polishing chamber is in threaded fitting connection to the first screwed rod; a first slide connection chamber is disposed in the slide connection block; an up-down slide connection block is connected in the first slide connection chamber by slide fitting; and raised slide connection blocks which are in slide fitting connection with interiors of two sides of the first slide connection chamber are disposed on tops of two sides of the up-down slide connection block. According to the invention, the structure is simple; operations are convenient; safety is high; opening and closing of a partition plate can be controlled automatically; dust prevention effects are good; polishing is accurate; and stability is high.

This invention provides a polishing pad, which includes a substrate and a plurality of discrete abrasive blocks fixed on the substrate, wherein the abrasive blocks are of at least two kinds of heights. This invention would not reduce the polishing rate dramatically during the process for polishing a wafer by using the polishing pad in the long run. Therefore a thickness of the wafer to be polished is able to be controlled accurately, thereby improving the effect and yield of polishing the wafer. The present invention further provides a method for manufacturing the polishing pad. The polishing pad according to this invention is manufactured conveniently by using this method. Correspondingly, a method for using the polishing pad is also provided in this invention.

The invention discloses a variable-parameter crank shaft corrective polishing method and a device. The variable-parameter crank shaft corrective polishing device comprises a machine tool which drives a crank shaft to rotate, a servo holding device and two polishing pressure heads, wherein each polishing pressure head comprises a base seat, at least two polishing air bags which are fixedly connected in the base seat and a pressurization air bag. The pressurization air bag is located between the polishing air bags, outer ends of the air bags are all located outside the self base seat and are arranged in an arc shape, the outer end faces of the outer ends are all in arc shapes, the base seats are both fixedly connected with abrasive belts, the polishing air bags are connected with a polishing air source, and the pressurization air bags are connected with the polishing air source and a corrective air source through an automatic control valve on external pipelines. A roundness detection sensor is further arranged on the servo holding device or the two polishing pressure heads, the machine tool is provided with a rotation speed sensor, and the auto control valve, the roundness detection sensor and the rotation speed sensor are all connected with an industrial control machine. According to the variable-parameter crank shaft corrective polishing method and the device, not only can the roundness error of a shaft neck of the crank shaft be accurately corrected and polished, but also a crank shaft neck round angle and two side faces of a thrust shaft neck can be polished, and the machining efficiency is high.

The invention discloses a rotary multi-angle automatic polishing system and a polishing method thereof. The rotary multi-angle automatic polishing system comprises a working stand, a polishing device, a clamping device and a control device, wherein the polishing device is provided with a hinge plate, a polishing component and a polishing driving device for driving the polishing component to operate; the clamping device is provided with a clamping component, a push driving device and a translation driving device; the clamping component is hinged to the working stand; the push driving device is used for driving the clamping component to rotate towards the polishing component along a plane perpendicular to a rotating shaft; the translation driving device is used for driving the clamping component to move reciprocally along the axial direction of the rotating shaft; the clamping component is also provided with a rotating device and a rotation driving device; the rotation driving device is used for driving the rotation device to rotate; the clamping component is hinged to the hinge plate; the clamping device is also provided with a rotation driving device for driving the clamping component to rotate reciprocally towards the polishing component relative to the hinge plate. According to the rotary multi-angle automatic polishing system, multi-angle continuous polishing can be realized, the polishing is accurate, the health of workers is protected, and the cost is low.