Patent ID: 7408760
Filing Date: 2008-08-05
Classification: G03F,H01J,H01L

Abstract:
1. A charged particle beam application system, comprising: a sample stage for holding a sample; means for irradiating charged particle beam to the sample on the sample stage; and an electrostatic chuck mounted on said sample stage, wherein the electrostatic chuck comprises: a dielectric having a mounting surface on which the sample is mounted; electrodes provided in the dielectric; a contact terminal for setting said sample to ground potential; a variable direct current power supply and a direct current power supply electrically connected to said electrodes; control means for controlling a voltage applied to the variable direct current power supply; and current measuring means arranged between said contact terminal and said ground potential, and said control means calculates said voltage applied to the variable direct current power supply based on the measurement result of the current measuring means.