Home port and substrate processing apparatus using same

A substrate processing apparatus comprising:

• a housing a processing space therein;
• a substrate support unit supporting a substrate in the housing;
• a liquid supply unit having a nozzle configured to supply a processing liquid to the substrate;
• and
• a home port located outside the housing, configured to allow the nozzle to wait therein, and configured to discharge the processing liquid discharged by the nozzle to outside,
• wherein the home port comprises:
• a main body having a space therein;
• a nozzle holder provided at an upper portion of the main body and configured to mount the nozzle;
• an inclined surface formed below the nozzle holder in the space;
• a first supply pipe configured to discharge a rinse liquid to a tip of the nozzle;
• a second supply pipe configured to inject the rinse liquid into the main body;
• a conductive wire configured to electrically connect the inclined surface and the first supply pipe;
• and
• a first switch installed on the conductive wire.

A home port installed in a substrate processing apparatus to temporarily mount a nozzle for discharging a process liquid to a substrate, the home port comprising:

• a main body having a space therein;
• a nozzle holder provided at an upper portion of the main body and configured to mount the nozzle;
• an inclined surface formed below the nozzle holder in the space;
• a first supply pipe configured to discharge a rinse liquid to a tip of the nozzle;
• a second supply pipe configured to inject the rinse liquid into the main body;
• a conductive wire configured to electrically connect the inclined surface and the first supply pipe;
• a first switch installed on the conductive wire;
• a ground wire configured to electrically connect the inclined surface and a ground electrode to discharge electric charges conducted on the inclined surface;
• and
• a second switch installed on the ground wire,
• wherein the first supply pipe is composed of a plurality of pipes treated with plating or ion implantation,
• the first supply pipe is positively charged when the inclined surface is negatively charged by positively charged process liquid discharged from the nozzle and electric charges move along the conductive wire thereby,
• the first supply pipe is maintained in a charged state when the first supply pipe is electrically disconnected by the first switch installed on the conductive wire, and
• the rinse liquid positively charged by the first supply pipe is discharged to the nozzle so that a surface of the nozzle is positively charged, thereby preventing deposition of charged fumes.