The results of the measurements using an optical surface roughness meter are shown according to the angle changes of 0, 0.5, 1, 1.5, 2, and 3°. Through the experiment, it can be seen that the measurement value is 3.140 at 0°, 3.148 at 0.5°, 3.140 at 1°, 3.151 at 1.5°, 5.078 at 2°, and 4.790 at 3° setting. In addition, the test statistic (P) value is 0.000, which is smaller than the significance level of 0.005, so it was confirmed through the experiment that a measurement error occurs according to the angle change when measuring the surface roughness.

Abstract
1. 서 론
2. 관련이론
    2.1 표면 거칠기 측정이론
    2.2 측정기 구조 및 원리
3. 실험장치 및 방법
3. 결과 및 고찰
4. 결 론
References

• 최지선(Assistant Professor Dept. Semiconductor convergence machine of Korea Polytechnic colleges) | J. S Choi
• 정현석(Dept. Semiconductor quality measurement of Korea Polytechnic colleges) | H. S Jung Corresponding author