Patent ID: 8501025

Claim:
A substrate treatment method comprising: a step of preparing a seal chamber defining a sealed internal space, the seal chamber preparing step including a step of closing an opening of a chamber body with a lid member rotatable with respect to the chamber body, and a step of liquid sealing between the lid member and the chamber body with a first liquid seal structure, so as to define the sealed internal space sealed from outside; a step of placing a substrate in the sealed internal space of the seal chamber and rotating the substrate in the sealed internal space; a step of supplying a treatment liquid to the substrate in the sealed internal space of the seal chamber, the treatment liquid supplying step being performed while the substrate is rotated in the substrate rotating step; a first locating step of locating the substrate and the lid member in a drying positional relationship in which the substrate is located closer to the lid member than in the treatment liquid supplying step within the sealed internal space of the seal chamber sealed with the lid member and the first liquid seal structure; and a drying step of rotating the lid member and the substrate at a predetermined drying rotation speed with the substrate and the lid member being located in the drying positional relationship within the sealed internal space of the seal chamber sealed with the lid member and the first liquid seal structure.