Inkjet printing apparatus and method for inspecting inkjet head using same

An inkjet printing apparatus comprising:

• an inspection stage unit on which an inspection substrate is placed;
• a stage unit that is located apart from the inspection stage unit and on which a target substrate is placed;
• an inkjet head unit that is located above the inspection stage unit and the stage unit and that includes a plurality of inkjet heads configured to eject ink, which contains dipoles and a solvent in which the dipoles are dispersed;
• a first heat treatment unit located above the stage unit and configured to radiate first light;
• a first sensing unit configured to measure a position of the ink applied onto the inspection substrate;
• and
• a particle count inspection unit configured to inspect a number of dipoles contained in the ink applied onto the inspection substrate,
• wherein the particle count inspection unit includes a second heat treatment unit located above the inspection stage unit and configured to radiate second light, and
• a second sensing unit located above the inspection stage unit and configured to measure the number of dipoles contained in the ink applied onto the inspection substrate.

A method of inspecting an inkjet head, comprising:

• ejecting ink, which contains a plurality of dipoles and a solvent in which the plurality of dipoles are dispersed, on an inspection substrate;
• inspecting a discharge amount of the ink applied onto the inspection substrate;
• removing the solvent contained in the ink applied onto the inspection substrate;
• and
• measuring a number of dipoles remaining on the inspection substrate.