Patent ID: 9048269
Filing Date: 2015-06-02
Classification: H01L

Abstract:
1. A liquid treatment apparatus comprising: a substrate retaining unit comprising a retaining member, configured to hold a peripheral edge of a substrate to retain the substrate horizontally; a lift pin plate provided thereon with lift pins, the lift pins being arrayed on an imaginary circle extending along and adjacent to a periphery of the lift pin plate, wherein a through-hole is formed in a central portion of the lift pin plate; a rotational driving unit configured to rotate the substrate retaining unit together with the lift pin plate; a first nozzle disposed below a lower surface of the substrate retained by the substrate retaining unit to eject a treatment liquid towards the lower surface of the substrate, the first nozzle comprising a central member opposing a central portion of the substrate and a bar-shaped portion extending from the central member radially outwardly and terminating before the imaginary circle to avoid interference of the bar-shaped portions with the lift pins, wherein the bar-shaped portion has a plurality of first ejection ports arrayed from a position opposing a central portion of the substrate to a position opposing a peripheral portion of the substrate retained by the substrate retaining unit, and the central member is positioned above the through-hole; and a vertical driving unit configured to vertically move the lift pin plate together with the first nozzle relative to the substrate retaining unit so as to lift the substrate released from the substrate retaining unit by means of the lift pins; a liquid supply mechanism that supplies a treatment liquid to the first ejection ports, wherein each of the first ejection ports is configured to eject the treatment liquid towards the lower surface of the substrate in an ejecting direction which is inclined towards a rotation direction of the substrate rotated by the rotational driving unit.