Patent ID: 9177781
Filing Date: 2015-11-03
Classification: H01L

Abstract:
1. A plasma processing method of removing a deposit on a sidewall portion of a pattern of having metal layers in a stacked structure on a substrate, the method comprising: preparing the substrate with the pattern having metal layers in a stacked structure formed by dry processing, the stacked structure having a sidewall on a sidewall portion of which a deposit is deposited, the deposit containing at least one of metals of the metal layers; subjecting the stacked structure having said deposit to a protective layer forming step in which an oxide or chloride of the at least one of the metals is formed on the sidewall of the stacked structure having said deposit; applying a plasma of a gas containing fluorine atoms to remove the deposit; and applying a plasma containing hydrogen after forming the protective layer and removing the deposit, so as to reduce the oxide or chloride of the at least one of the metals.