Patent ID: 8052886
Filing Date: 2011-11-08
Classification: H01J,H01L

Abstract:
1. A plasma etching method, comprising the steps of: converting a process gas including a fluorine-containing compound gas into a plasma; and etching a silicon portion of an object to be processed with the plasma, wherein a light having a peak intensity of light in a wavelength range of light absorption of a reaction product produced by the etching is irradiated onto a surface of the object to be processed wherein, the process gas is introduced into a chamber by a gas supply unit, the gas supply unit including a plurality of light transmitting windows for transmitting the light from a light source, and the light transmitting windows being formed in a surface of the gas supply unit facing the object and in a surface of the gas supply unit facing the light source, and wherein the light is irradiated uniformly onto the whole surface of the object through the light transmitting windows.