Patent ID: 8738174

Claim:
A substrate processing apparatus for loading and unloading a plurality of substrates on and from a tray, the substrate processing apparatus comprising: a tray carrying unit configured to receive and carry a tray; a substrate loading conveyor unit on which substrates to be loaded on a tray are arranged in a line; a substrate unloading conveyor unit on which substrates unloaded from a tray are arranged in a line; a first substrate carrying robot configured to pick up substrates from the substrate loading conveyor unit and carry the substrates to a tray placed on the tray carrying unit, wherein the first substrate carrying robot includes, a pair of transfer rails disposed at both sides above the tray carrying unit, a movable frame movable along the transfer rails, and a chuck unit disposed on the movable frame and configured to hold substrates, the chuck unit including, a support frame on which Bernoulli chucks are disposed to hold substrates from top surfaces of the substrates by a non-contact method; and an elevation driving unit configured to move the support frame upward and downward; and a second substrate carrying robot configured to pick up substrates from a tray placed on the tray carrying unit and carry the substrates to the substrate unloading conveyor unit.