Patent ID: 9711406
Date: 2017-07-18
CPC Classifications: H01J,H01L

Claim:
1. A method for plasma dicing a substrate, the method comprising: providing a process chamber having a wall; providing a plasma source adjacent to the wall of the process chamber; providing a work piece support within the process chamber; providing an electrostatic clamp having a clamping electrode within the work piece support; placing a work piece onto said work piece support, said work piece having a support film, a frame and the substrate; providing a cover ring in the process chamber; generating a plasma using the plasma source; etching said work piece using the generated plasma while said cover ring overlaps at least a part of the frame of the work piece; and electrostatically clamping the frame of the work piece using said clamping electrode during the etching step, wherein at least a part of the frame of the work piece overlaps said clamping electrode.