Patent ID: 8314030

Claim:
A method for fabricating a semiconductor device by using a chemical mechanical polishing (CMP) process with a slurry comprising: a cerium oxide powder with a bimodal particle size distribution in which a volume fraction of a first cerium oxide particle having a particle size of approximately 0.01 μm to approximately 1 μm to a second cerium oxide particle having a particle size of approximately 1 μm to 10 μm is in a range between 10:90 and 90:10, wherein the first cerium oxide particle having the particle size of approximately 0.01 μm to approximately 1 μm has a specific surface area of 5 m 2 /g or more, a volume fraction of a pore having a diameter of 3 nm or more to a pore having a diameter of less than 3 nm is in a range between 8:2 and 2:8, and the second cerium oxide particle having the particle size of approximately 1 μm to approximately 10 μm is formed by aggregation of the first cerium oxide particles having the particle size of approximately 0.01 μm to approximately 1 μm; a first polyacrylic acid having a weight average molecular weight of approximately 2,000 to approximately 8,000, and a second polyacrylic acid having a weight average molecular weight of approximately 5,000 to 10,000; a compound having a weight average molecular weight of approximately 30 to approximately 500 and containing at least one of a hydroxyl group (OH) and a carboxyl group (COON); and a water.