Patent ID: 8336485

Claim:
A coating apparatus comprising: a first vessel having a receiving space defined therein for receiving a plurality of substrates and a first solution; a revolving unit received in the receiving space and rotatable relative to the first vessel to impart a centrifugal force to the first solution, the revolving unit comprising a plurality of concentric steps and being tapered toward a bottom in the first vessel; a motor having a drive shaft, the drive shaft being coupled to the revolving unit, the motor being configured for rotating the revolving unit, and a central axis of the revolving unit aligning with the drive shaft; and an atomizing unit, the atomizing unit comprising: a second vessel for receiving a second solution; an atomizing element received in the second vessel for atomizing the second solution; and at least one pipe, wherein the revolving unit has at least one through hole defined therein, the at least one pipe connecting the second vessel to the revolving unit, and the at least one pipe is configured for guiding the atomized second solution from the second vessel to the first vessel via the at least one through hole.