Patent ID: 6716803
Filing Date: 2004-04-06
Classification: C11D,H01L

Abstract:
A method for cleaning a semi-conductor substrate having copper wirings on its surface, comprising treating a surface of a semi-conductor substrate having copper wirings on its surface with a cleaning agent comprising a compound shown by the general formula (2â€²): (wherein R1 and R2 are each independently a hydrogen atom, a hydroxy group, an alkyl group or a hydroxyalkyl group, r and s are each independently 0 or a positive integer, and R5â€²is a hydrogen atom, a hydroxy group, an alkyl group, a hydroxyalkyl group or a group of the general formula (3â€²): in which R3 and R4 are each independently a hydrogen atom, a hydroxy group, an alkyl group or a hydroxyalkyl group, and râ€² and sâ€² are each independently 0 or a positive integer, except for a case where r and s are 0 and a case where râ€² and sâ€² are 0) and an N-containing alkaline substance.