Patent ID: 7126091
Filing Date: 2006-10-24
Classification: H01L

Abstract:
1. An electrostatic chuck for clamping a workpiece to a supporting surface of the chuck, the chuck comprising: at least two mutually electrically insulated bifilar conductors configured as interleaved spirals disposed entirely on the workpiece supporting surface, each of the bifilar conductors having a respective electrode at each of two ends thereof; a first electric power supply connected to at least two of the at least two bifilar conductors for creating an electric field therebetween, the electric field for clamping the workpiece to the workpiece supporting surface; and a second power supply connected to each of the two electrodes of one of the at least two bifilar conductors so that an electric current passed through the one of the at least two bifilar conductors heats the supporting surface of the chuck.