Patent ID: 6494221
Filing Date: 2002-12-17
Classification: H01L,Y10S

Abstract:
A device for removing an edge (10k) of a semiconductor disk (10) in a defined manner, which semiconductor disk having been treated previously by grinding and polishing or thin etching and providing a reduced thickness compared with a basic first wafer and microcracks along its edge, having the following features:1.1 a support (12) having a support surface (12f) for receiving rotationally the semiconductor disk (10), as well as 1.2 a nozzle (18), disposed above the semiconductor disk (10), the mouth portion (20) of which is designed and oriented so that a jet (22) of etching fluid coming out of mouth portion (20) having a flow rate which corresponds maximally to the peripheral velocity of the semiconductor disk (10) runs in a tangential direction with respect to the edge (10k) of the semiconductor disk (10) and completely removes the edge (10k) of the semiconductor disk (10) and which faces the nozzle (18) at an angle >0 and <90 degrees with respect to the plane (E) of the semiconductor disk (10).