Patent ID: 9186910
Filing Date: 2015-11-17
Classification: B41J,H01L

Abstract:
1. A printing apparatus in combination with a substrate recognizing a location of the substrate in which a plurality of alignment marks are formed, comprising: a stage to which the substrate is mounted; a location recognition unit recognizing a location of the substrate mounted to the stage; and a printing unit disposed in an upper portion of the stage and coating a printing solution on the substrate, wherein the location recognition unit comprises, a camera photographing the alignment marks, and wherein each of said plurality of alignment marks has eight separate segments in a circular shape that is rotationally symmetrical and maintains the same visual shape no matter what angle the alignment mark is viewed from, and the plurality of alignment marks are disposed to be rotationally symmetrical to each other with reference to the center of the substrate for the locations of the alignment marks to be the same even though the substrate is rotated by a predetermined angle with reference to the center of the substrate.