Substrate cleaning device and substrate cleaning method

A substrate cleaning device comprising:

• a processing tank capable of accommodating a plurality of substrates arranged in a thickness direction of the substrates;
• at least one spray tube extending in the thickness direction and configured to emit a cleaning liquid to each of the substrates accommodated in the processing tank;
• and
• a scanning mechanism configured to move the at least one spray tube along an outer periphery of the substrate to perform a scan,
• wherein the at least one spray tube is a plurality of spray tubes, and the scanning mechanism moves the plurality of spray tubes within a plurality of scan ranges, respectively, along the outer periphery of the substrate,
• wherein each of the plurality of spray tubes includes a first nozzle configured to emit the cleaning liquid to a first surface of the substrate and a second nozzle configured to emit the cleaning liquid to a second surface of the substrate opposite to the first surface,
• wherein the substrate cleaning device further comprises:
• a holder arranged in the processing tank and provided with a plurality of grooves at an interval in the thickness direction, the grooves being capable of holding the substrates upright, respectively;
• and
• a controller configured to detect whether any of the substrates is held in each of the grooves and to control whether to emit the cleaning liquid by the first nozzle and the second nozzle in accordance with a detection result,
• wherein the scanning mechanism includes an arm configured to move the plurality of spray tubes along the outer periphery of the substrate while holding the plurality of spray tubes,
• wherein the scanning mechanism further includes a guide configured to guide movement of the plurality of spray tubes,
• wherein the plurality of spray tubes comprises:
• an upper movable spray tube movable in a first scan range that has an arc shape along an upper outer periphery of the substrate,
• a left-side movable spray tube movable in a second scan range that has an arc shape along a left-side outer periphery of the substrate,
• a right-side movable spray tube movable in a third scan range that has an arc shape along a right-side outer periphery of the substrate, and
• a fixed spray tube fixed in the processing tank,
• wherein the arm comprises:
• a first arm connected at its lower end to the upper movable spray tube to move the upper movable spray tube within the first scan range while holding the upper movable spray tube in such a manner that the first scan range is scanned,
• a second arm connected at its lower end to the left-side movable spray tube to move the left-side movable spray tube within the second scan range while holding the left-side moveable spray tube in such a manner that the second scan range is scanned, and
• a third arm connected at its lower end to the right-side movable spray tube to move the right-side movable spray tube within the third scan range while holding the right-side movable spray tube in such a manner that the third scan range is scanned,
• wherein the guide comprises:
• a first guide provided at a lower end of the first arm to guide movement of the upper movable spray tube,
• a second guide provided a lower end of the second arm to guide movement of the left-side movable spray tube, and
• a third guide provide at a lower end of the third arm to guide movement of the right-side movable spray tube.