Substrate-cutting system, substrate-producing apparatus, substrate-scribing method, and substrate-cutting method

A substrate cutting system comprising:

• a clamp device for gripping a side edge of a substrate and holding the substrate in a horizontal state;
• a pair of substrate cutting devices respectively being provided above and below the substrate, the pair of substrate cutting devices respectively forming a scribing line on an upper surface and a lower surface of the substrate;
• a scribing device guide body for holding each of the substrate cutting devices such that each of the substrate cutting devices is movable along the upper surface and the lower surface of the substrate in the X direction, the scribing device guide body being provided so as to be movable in the Y direction perpendicular to the X direction with respect to the clamp device;
• a first substrate supporting portion being provided on one side in the Y direction with respect to the scribing device guide body in order to support the lower surface of the substrate;
• and
• a second substrate supporting portion being provided on the other side in the Y direction with respect to the scribing device guide body in order to support the upper surface of the substrate;
• characterized in that
• the first substrate supporting portion and the second substrate supporting portion respectively include a plurality of first substrate supporting units and a plurality of second substrate supporting units, each of the plurality of first substrate supporting units and each of the plurality of second substrate supporting units moving in the Y direction along with the movement of the scribing device guide body in the Y direction, and a plurality of supporting belts are provided each supported by the substrate supporting units in the Y direction, and
• each of the supporting belts supports without rubbing the lower surface of the substrate, the substrate being held by the clamp device with respect to the Y direction of the first substrate supporting unit and the second substrate supporting unit along with the movement of the scribing device guide body in the Y direction.