Patent ID: 6551945
Filing Date: 2003-04-22
Classification: H01L

Abstract:
A process for manufacturing a semiconductor device, comprising the steps of:depositing an insulating film in a device forming area on a semiconductor device; depositing a barrier metal film on the insulating film; depositing a first ruthenium film on the barrier metal film; removing undesired ruthenium containing metal resulting from the deposit of said first ruthenium film adhering to an area other than the device forming area using a first remover containing (a) at least one compound selected from the group consisting of salts containing chlorate, perchlorate, iodate, periodate, salts containing bromine oxide ion, salts containing manganese oxide ion and salts containing tetravalent cerium ion and (b) at least one acid selected from the group consisting of nitric acid, acetic acid, iodic acid and chloric acid, but excluding the combination of acetic acid and salts containing tetravalent cerium ion; removing the residual first remover using a first washing, sequentially depositing a capacitance insulating film and a second ruthenium film after patterning the first ruthenium film, removing undesired ruthenium containing metal resulting from the deposit of said second ruthenium film adhering to an area other than the device forming area using a second remover containing (a) at least one compound selected from the group consisting of salts containing chlorate, percholate, iodate, periodate, salts containing bromine oxide ion, salts containing manganese oxide ion and salts containing tetravalent cerium ion and (b) at least one acid selected from the group consisting of nitric acid, acetic acid, iodic acid and chloric acid, but excluding the combination of acetic acid and salts containing tetravalent cerium ion; and removing the residual second remover using a second washing.