摘要:
A profile data compensating method comprises a step of generating effective profile data by operating a machine tool under a non-load condition in accordance with theoretical profile data, a step of generating first error profile data representing error components of a control system, a step of generating first compensated profile data based upon the first error profile data, a step of generating measured profile data by measuring the shape of the workpiece machined in accordance with the first compensated profile data, a step of generating second error profile data representing error components of a mechanical system, and a step of generating second compensated profile data based upon the first and second error profile data.
摘要:
An apparatus for adjusting the position of a work mounted on a machine tool. A base is fixed to a work table of the machine tool, and the position of a mounting member is adjusted with respect to the base. The work is mounted on a mounting surface of the mounting member. The positions in the Z-axis direction of central portions of the four sides of the mounting member are adjusted by first driving and fixing members so that a work surface of the work is along an X-Y plane. The position where the mounting member is rotated around the Z-axis is then adjusted by second driving and fixing members arranged in the central portions of the pair of opposite sides of the mounting member so that a plane of the work is parallel to an X-Z plane. Each of the driving and fixing members includes piezoelectric displacement elements for adjusting an amount of displacement in response to an applied voltage so as to fix the mounting member in a state where the amount of displacement is adjusted.
摘要:
A polishing apparatus is used for polishing a substrate such as a semiconductor wafer, and has a sensor capable of continuously detecting the thickness of an electrically conductive layer. The polishing apparatus includes a polishing table having a polishing surface, and a top ring for holding and pressing the substrate against the polishing surface to polish the surface of the substrate. A sensor such as an eddy-current sensor is disposed below the polishing surface of the polishing table for measuring the thickness of a conductive layer formed on the surface of the substrate.
摘要:
A polishing apparatus is used for polishing a substrate such as a semiconductor wafer, and has a sensor capable of continuously detecting the thickness of an electrically conductive layer. The polishing apparatus includes a polishing table having a polishing surface, and a top ring for holding and pressing the substrate against the polishing surface to polish the surface of the substrate. A sensor such as an eddy-current sensor is disposed below the polishing surface of the polishing table for measuring the thickness of a conductive layer formed on the surface of the substrate.