Patent ID: 9741627
Date: 2017-08-22
CPC Classifications: G01N,H01J,H01L

Claim:
1. An etching apparatus comprising a substantially cylindrical chamber having an upper portion, a bottom portion, and outer circumferential sides, in which a stationary substrate is arranged on the bottom portion, the etching apparatus comprising: gas supply means for supplying etching gas to a substrate surface; gas exhaust means for exhausting etched gas above substantially a center of the substrate; and gas-flow adjusting means arranged on a substantially concentric circle above the substrate and allowing the etching gas to flow from a periphery of the substrate to substantially the center of the substrate, wherein the gas-flow adjusting means is installed in a vertically movable manner, and substantially a center of the gas-flow adjusting means is connected with the gas exhaust means; and wherein no inlets are present in the sides of the chamber.