According to one exemplary embodiment, a method includes a step of forming
a polysilicon layer over a substrate by using a deposition process, where
the deposition process causes polysilicon nodule defects to form on a top
surface of the polysilicon layer. The method further includes performing
a polysilicon CMP process on the polysilicon layer, where the polysilicon
CMP process removes a substantial percentage of the polysilicon nodule
defects from the top surface of the polysilicon layer. The CMP process
removes at least 95.0 percent of the polysilicon nodule defects from the
top surface of the polysilicon layer. According to this embodiment, the
polysilicon CMP process utilizes a polishing pressure that is less than
1.5 psi. The polysilicon CMP process also utilizes a table speed of
between 20.0 rpm and 40.0 rpm. The polysilicon CMP process further
utilizes a colloidal silica slurry.