Patent ID: 11961757
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A substrate processing apparatus comprising:
a substrate holder; and
a tubular cup surrounding said substrate holder; wherein
said substrate holder including:
a holder holding a substrate in a horizontal attitude;
a ring member in a shape of a ring surrounding a peripheral edge of the substrate held by said holder of the substrate holder as seen in plan view, said ring member located between said holder of the substrate holder and said cup, said ring member having an upper surface level with or positioned below a front surface of said substrate, an inner peripheral surface extending vertically down below from an inner peripheral edge of said upper surface, and an outer peripheral surface extending vertically down below from an outer peripheral edge of said upper surface and opposed in spaced apart relation to an inner peripheral surface of said cup;
a rotation mechanism including a motor, said rotation mechanism rotating said holder of the substrate holder and said ring member about a rotation axis at rotation speeds different from each other and/or in rotational directions different from each other, said rotation axis being a vertical axis passing through the substrate held by said holder of the substrate holder,
an elevator moving said ring member upwardly and downwardly relative to said holder of the substrate holder,
a first processing liquid supply unit including a nozzle supplying a processing liquid to a front surface of a substrate held by said holder of the substrate holder;
a second processing liquid supply unit including a nozzle supplying a processing liquid to a back surface of the substrate held by said holder of the substrate holder; and
a controller configured to (i) control said elevator to stop said ring member at a first position lying below the front surface of said substrate and causing said first processing liquid supply unit to supply the processing liquid while causing said rotation mechanism to rotate said holder of the substrate holder and said ring member, and (ii) control said elevator to stop said ring member at a second position a distance equal to the thickness of said substrate below said first position and causing said second processing liquid supply unit to supply the processing liquid while causing said rotation mechanism to rotate said holder of the substrate holder and said ring member.