Substrate treatment apparatus and method of manufacturing semiconductor device

1. A substrate treatment apparatus, comprising:

a supporter configured to support and rotate a substrate;

a liquid supplier configured to supply a liquid to the substrate;

a side wall provided separately from the supporter, provided on a lateral side of the substrate, and at least partially surrounding the supporter; and

a probe provided between the supporter and the side wall and configured to emit light toward the side wall, the light being reflected by the side wall or by the liquid on the side wall,

wherein the probe includes a first portion facing the supporter and a second portion provided on an opposite side of the first portion and facing the side wall, and the probe is configured to emit the light toward the side wall from the second portion.

2. The apparatus of claim 1 , wherein a surface of the side wall is hydrophilic.

3. The apparatus of claim 1 , further comprising a detector configured to detect a chemical property of the liquid on the side wall based on the emitted light to the liquid, which is discharged from the substrate.

4. The apparatus of claim 3 , wherein the detector detects the light emitted toward the side wall.

5. The apparatus of claim 3 , further comprising a controller configured to receive a signal of the liquid on the side wall from the detector.

6. The apparatus of claim 1 , wherein the probe includes a lens, and a transparent member provided on a surface of the lens.

7. The apparatus of claim 1 , wherein the probe is connected to an optical fiber.

8. The apparatus of claim 1 , wherein the probe is provided separately from the side wall.

9. A substrate treatment apparatus, comprising

a supporter configured to support and rotate a substrate;

a liquid supplier configured to supply a liquid to the substrate;

a container configured to house the supporter, the container including a side wall provided on a lateral side of the substrate and a bottom wall provided below the substrate;

a detector configured to detect a chemical property of the liquid flowing along the side wall after the liquid is discharged from the substrate and before the liquid reaches the bottom wall; and

a controller configured to control a rotation of the supporter such that the liquid is scattered from the substrate and reaches the side wall.

10. The apparatus of claim 9 , wherein the detector is configured to detect light emitted to the liquid on the side wall.

11. The apparatus of claim 10 , further comprising a probe provided between the supporter and the side wall and configured to emit the light to the side wall, receive the emitted light, and supply the received light to the detector,

wherein the probe is disposed at a point within 100 μm from the side wall.

12. The apparatus of claim 9 , wherein the detector is further configured to detect the chemical property of the liquid by using the liquid flowing along a surface of the side wall toward the bottom wall.

13. The apparatus of claim 12 , wherein the detector detects light that is emitted to the liquid flowing along the surface of the side wall toward the bottom wall, transmitted through the liquid and reflected by the side wall.

14. The apparatus of claim 12 , wherein the surface of the side wall is hydrophilic.

15. The apparatus of claim 9 , further comprising a controller configured to receive a signal of the liquid on the side wall from the detector.

16. The apparatus of claim 9 , wherein the bottom wall includes a storage portion configured to store the liquid.

17. The apparatus of claim 16 , further comprising a flow passage through which the liquid stored in the storage portion is supplied to the liquid supplier.