Abstract:
A method of forming a plug and manufacturing a semiconductor device, a polishing chamber, and a semiconductor device, the method of forming a plug including forming an opening in an insulating interlayer pattern on a substrate; forming a metal layer to fill the opening; performing a first CMP process during a first time period until a top surface of the insulating interlayer pattern is exposed while pressing the substrate onto a first polishing pad to polish the metal layer; performing a second CMP process during a second time period while pressing the substrate onto a second polishing pad to polish the metal layer and the insulating interlayer pattern, so that a metal plug is formed in the insulating interlayer pattern; and performing a first cleaning process on the second polishing pad while keeping the substrate spaced apart from the second polishing pad on the second platen.