Patent ID: 6179955
Filing Date: 2001-01-30
Classification: H01J,H01L

Abstract:
A dry etching apparatus for manufacturing semiconductor devices comprising:a process chamber in which a wafer is mounted on a chuck and a plasma etching process is performed;a dielectric window located on an upper surface of the process chamber to cover the process chamber, a lower surface of the dielectric window shaped such that a first portion of the lower surface of the dielectric window is spaced further from a horizontal surface of the chuck than a second portion of the lower surface of the dielectric window, the first and second portions being arranged so that the first portion faces higher density plasma in the process chamber than the second portion, wherein an upper surface and the lower surface of the dielectric window are curved inwards at the center of the respective upper and lower surfaces and have a concave shape; anda coil located adjacent to the upper side of the dielectric window and connected to a power source.