Patent ID: 8376809
Filing Date: 2013-02-19
Classification: B24B

Abstract:
1. A cylindrical grinder, comprising: a support assembly including an upper support and a lower support, in which an ingot of silicon single crystal is interposed in a direction of an axis line of the ingot between the upper support and the lower support and is clampingly held to be rotated around the axis line of the ingot; a grinder that relatively moves along the direction of axis line of the ingot to traverse grind an outer circumference of the ingot, wherein the upper support is placed at an upper position and the lower support is placed at a lower position, so that the support assembly clampingly holds the ingot in a state in which the direction of the axis line of the ingot is disposed along a vertical direction; and a positioner configured to position the ingot at a predetermined position by pressing the ingot, which is interposed between the upper support and the lower support, in a horizontal direction.