Patent ID: 6992006
Filing Date: 2006-01-31
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, the method comprising: a wiring step of performing chemical mechanical polishing with respect to a metal film made of copper formed on a semiconductor substrate to form wires each composed of the metal film on the semiconductor substrate; a native oxide removal step of removing a native oxide by dissolving it by using an oxalic acid, the native oxide being formed on a surface of a wire-to-wire bridge occurring in the wiring step and remaining on the semiconductor substrate to cause unneeded conduction between the wires adjacent to each other, and after the native oxide removal step, a cleaning step of removing the wire-to-wire bridge, the cleaning step including: an oxidation step of oxidizing the wire-to-wire bridge by using an aqueous hydrogen peroxide to change the wire-to-wire bridge into a copper oxide; and an oxide removal step of removing the copper oxide by dissolving it by using an oxalic acid.