摘要:
A polishing apparatus includes: a table rotating motor configured to rotate the polishing table about its own axis; a top ring rotating motor configured to rotate the top ring about its own axis; a dresser configured to dress the polishing pad; a pad-height measuring device configured to measure a height of the polishing pad; and a diagnostic device configured to calculate an amount of wear of the polishing pad from the height of the polishing pad and to determine the end of a life of the polishing pad based on the amount of the wear of the polishing pad, the torque or current of the table rotating motor, and the torque or current of the top ring rotating motor.
摘要:
A multistage pump, comprising a plurality of intermediate casings (2) formed by press-molding a steel plate, the intermediate casing further comprising a cylindrical side face part (21), a stage flat face part (23) coming into contact with the axial end face of the adjacent intermediate casing, a step side face part (24) axially extending from the stage flat face part, and a bottom face part (25) extending from the step side face part in radial inner direction, wherein a relief plate (30) having an outer peripheral end face coming into contact with the inner peripheral surface of the cylindrical side face part of the adjacent intermediate casing is installed at the bottom face part of the intermediate casing so that a space for installing an O-ring (40) can be formed of the relief plate, stage side face part, stage flat face part and the inner peripheral surface of the cylindrical side face part of the intermediate casing.
摘要:
A substrate processing apparatus (1) includes first and second polishing units (70A, 70B) for polishing a peripheral portion of a substrate (W), a primary cleaning unit (100) for cleaning the substrate (W), a secondary cleaning and drying unit (110) for drying the substrate (W) cleaned in the primary cleaning unit (100), and a measurement unit (30) for measuring the peripheral portion of the substrate (W). The measurement unit (30) includes a mechanism for measurement required for polishing in the first and second polishing units (70A and 70B), such as a diameter measurement mechanism, a cross-sectional shape measurement mechanism, or a surface condition measurement mechanism.
摘要:
A polishing apparatus (1) has a polishing pad (22), a top ring (20) for holding a semiconductor wafer (W), a vertical movement mechanism (24) operable to move the top ring (20) in a vertical direction, a distance measuring sensor (46) operable to detect a position of the top ring (20) when a lower surface of the top ring (20) is brought into contact with the polishing pad (22), and a controller (47) operable to calculate an optimal position of the top ring (20) to polish the semiconductor wafer (W) based on the position detected by the distance measuring sensor (46). The vertical movement mechanism (24) includes a ball screw mechanism (30, 32, 38, 42) operable to move the top ring (20) to the optimal position.