Patent ID: 6045436
Filing Date: 2000-04-04
Classification: B24B

Abstract:
A process for the material-abrading machining of an edge of a semiconductor wafer, comprising the steps of:resting the semiconductor wafer on a rotationally movable table;rotating said wafer about a central axis;machining said wafer by a plurality of rotating machining tools; each of the machining tools abrading a specific quantity of material from the edge of the semiconductor wafer;successively advancing the machining tools during the course of a 360.degree. rotation of the semiconductor wafer towards the edge of the semiconductor wafer and ultimately simultaneously machining the edge of the semiconductor wafer, and a machining tool which has just been advanced abrading a smaller quantity from the edge of the semiconductor wafer than a previously advanced machining tool;terminating the machining of the edge of the semiconductor wafer with one machining tool at the earliest once the semiconductor wafer has rotated through 360.degree., calculated from advancement of this machining tool; andwherein machining tools which are adjacent during the machining of the edge of the semiconductor wafer rotate in opposite directions of rotation.