Elektrostatische Spannvorrichtung und Verfahren zur Herstellung derselben

摘要

Disclosed is an electrostatic chuck having a coating layer (3) surrounding an insulating layer (1,2) and the electrodes (3) consists essentially of non-crystalline carbon (DLC) having electric resistivity ranging from 10 sup 8 to 10 sup 13 OMEGA -cm. The coating layer preferably contains 15-26 atom% of hydrogen. The coating layer preferably has an intensity ratio of 0.7-1.2, the intensity ratio being defined as a ratio of an intensity at 1360cm<-1> to another intensity at 1500cm<-1> when the said coating layer is subjected to Raman spectroscopic analysis. The coating layer is manufactured by the P-CVD process wherein hydrocarbon (CxHy) is introduced into a vacuum container and ionized therein by ionizing process and ionized hydrocarbon is deposited on the surface of the said conductive electrodes by applying thereto a predetermined pulse voltage within an after-glow time of smaller than 250 microseconds.