Patent ID: 9330935
Filing Date: 2016-05-03
CPC Classification: H01J,H01L

Claim Text:
1. A plasma etching method comprising: providing a target object on a mounting table serving as a lower electrode, the target object being sequentially laminated with an organic film and a photoresist, the photoresist being one of an ArF resist and an Extreme Ultra-Violet (EUV) resist and having a predetermined pattern; applying plasma of HBr/Ar gas to a surface of the photoresist while introducing the HBr/Ar gas into a processing chamber and applying a first high frequency power and a negative DC voltage a shower head serving as to an upper electrode containing silicon disposed to face the target object without applying a second high frequency power having a frequency lower than that of the first high frequency power to the lower electrode in order to perform at least one of: using the photoresist where the resistance to the plasma is reinforced and the surface roughness is improved at the applying, etching the organic film by plasma of a processing gas which contains a CF-based gas and a CHF-based gas.