POLISHING COMPOSITION FOR SEMICONDUCTOR PROCESS AND MANUFACTURING METHOD OF SUBSTRATE USING THE SAME
A polishing composition for a semiconductor process includes polishing particles, a polishing pad protectant, and a fluorinated surfactant. The polishing composition for the semiconductor process has an Rm/e value of 2.5% or less, which is a ratio of a number of defects derived from an organic substance as calculated by Equation 1 below. Rm / e = Dm De × 100 ( % ) [ Equation 1 ] In the Equation 1, a De value is a number of defects detected from a top surface of a substrate after polishing the top surface with the polishing composition for the semiconductor process and etching back the top surface, and a Dm value is a number of defects derived from the organic substance among 100 defects randomly selected from the defects detected from the top surface after the polishing and etching back of the top surface. In these cases, polished and etched surfaces can prevent contamination by particles, especially organic particles.
1 . A polishing composition for a semiconductor process, the polishing composition comprising:
polishing particles;
a polishing pad protectant; and
a fluorinated surfactant,
wherein the polishing composition has an Rm/e value of 2.5% or less, which is a ratio of a number of defects derived from an organic substance as calculated by Equation 1 below;
Rm
/
e
=
Dm
De
×
100
(
%
)
[
Equation
1
]
wherein in the Equation 1, a De value is a number of defects detected from a top surface of a substrate after polishing the top surface with the polishing composition for the semiconductor process and etching back the top surface, and
wherein a Dm value is a number of defects derived from the organic substance among 100 defects randomly selected from the defects detected from the top surface after the polishing and etching back of the top surface.
2 . The polishing composition for a semiconductor process of claim 1 , wherein the polishing pad protectant comprises a sugar alcohol.
3 . The polishing composition for a semiconductor process of claim 2 , wherein the sugar alcohol is one selected from the group consisting of sorbitol, mannitol, galactitol, fucitol, iditol, inositol, arabitol, xylitol, erythritol, threitol, and combinations thereof.
4 . The polishing composition for a semiconductor process of claim 1 , wherein the fluorinated surfactant is a compound represented by Formula 1 below;
R f —(R en —O) n —H [Formula 1]
In the Formula 1, R f is a fluoroalkyl group having a carbon number from 3 to 10, R en is an alkylene group having a carbon number of 2 or 3, and n is an integer from 2 to 15.
5 . The polishing composition for a semiconductor process of claim 1 , wherein the polishing composition comprises from 1 wt % to 5 wt % of the polishing pad protectant.
6 . The polishing composition for a semiconductor process of claim 1 , wherein the polishing composition comprises from 10 ppm (by weight) to 500 ppm (by weight) of the fluorinated surfactant.
7 . The polishing composition for a semiconductor process of claim 1 , further comprising a tungsten inhibitor,
wherein the tungsten inhibitor is one selected from the group consisting of an azole-based compound, an amino acid, and combinations thereof.
8 . The polishing composition for a semiconductor process of claim 1 , wherein the polishing composition has a pH of 2.5 to 5.
9 . A method of manufacturing a substrate, the method comprising:
polishing the substrate by applying a polishing composition for a semiconductor process, the polishing composition comprising:
polishing particles;
a polishing pad protectant; and
a fluorinated surfactant,
wherein the polishing composition has an Rm/e value of 2.5% or less, which is a ratio of a number of defects derived from an organic substance as calculated by Equation 1 below;
Rm
/
e
=
Dm
De
×
100
(
%
)
[
Equation
1
]
wherein in the Equation 1, a De value is a number of defects detected from a top surface of the substrate after polishing the top surface with the polishing composition and etching back the top surface, and
wherein a Dm value is a number of defects derived from the organic substance among 100 defects randomly selected from the defects detected from the top surface after the polishing and etching back of the top surface.