| abstract |
An etching method includes: adsorbing an adsorbate based on a processing gas containing BCl3 gas onto a target object, which serves as a to-be-etched object, by: supplying H2 gas and the processing gas to a process space in which the target object is disposed; and applying power of a predetermined frequency to the process space, while supplying the H2 gas is stopped, to generate plasma in the process space; and etching the target object by generating plasma of a rare gas in the process space to activate the adsorbate. |