Coating apparatus

A coating apparatus for conducting coating by discharging liquid droplets onto a substrate, comprising:

• a discharging head having a housing, an external electric terminal which is disposed on an outer surface of the housing and configured to receive control signals, a plurality of nozzles disposed on an outer surface of the housing, and a discharging unit which is incorporated in the housing and configured to receive the control signals via the external electric terminal and to discharge liquid droplets through the plurality of nozzles in response to the control signals;
• a drive control board to output the control signals;
• a cable having a cable end connected to the drive control board and another cable end
• a relay board which is located outside of the housing discharging head and has a first electric terminal and a second electric terminal, wherein the first electric terminal is connected to the external electric terminal on the housing so as to form a first electric joint section relative to the external electric terminal and second electric terminal is connected to the another cable end so as to form a second electric joint section relative to the cable so that the control signals are transmitted from the drive control board to the discharging unit via the cable, the second electric joint section, the relay board and the first electric joint section;
• and
• an intercepting member located outside of the housing of the discharging head and enclosing the first electric joint section, the second electric joint section and the relay board and intercepting contact between the first electric joint section and outside air and contact between the second electric joint section and outside air.