Patent ID: 6159284
Filing Date: 2000-12-12
Classification: B24B,B28D,Y10S,Y10T

Abstract:
A process for producing a cylindrical single crystal of semiconductor material, which has a crystal lattice, a crystal axis and a geometrical axis, a spatial position of the crystal axis being established by X-ray optics, comprising the steps of:a) producing a single crystal with an alignment error of the crystal lattice equal to at most 1.5.degree.;b) arranging the single crystal in such a way that the single crystal is rotatable about two axes of rotation, the axes of rotation being perpendicular to two planes that are spanned by two axes of an orthogonal coordinate system with axes x, y and z;c) rotating the single crystal about the axes of rotation until the crystal axis is parallel to the x,y plane and parallel to the x,z plane of the coordinate system;d) fitting pads to ends of the single crystal; ande) rotating the single crystal about the crystal axis, clamping the single crystal between the pads in a grinding machine, and grinding a lateral surface of the single crystal until the single crystal has a specific uniform diameter.