Patent ID: 8585465

Claim:
A method of planarizing a surface of a semiconductor device in the presence of a layer of silicon dioxide and a layer of silicon nitride, the method comprising: providing a first solution in a manufacturing environment, said first solution having a first pH value and comprising abrasive particles, wherein a percentage of said abrasive particles is between 6 weight percent and 9 weight percent; providing a second solution in said manufacturing environment, said second solution comprising an acid; producing a slurry solution in said manufacturing environment from at least said first and second solutions, said slurry solution having a second pH value between 6.5 and 8; and performing a planarization process in said manufacturing environment using said slurry solution produced in said manufacturing environment, wherein, when performing said planarization process using said slurry solution, a difference between a removal rate of said layer of silicon dioxide and a removal rate of said layer of silicon nitride solution is less than 10% of the removal range of said layer of silicon dioxide.