Patent ID: 9127368
Filing Date: 2015-09-08
Classification: C09K,C23F,H01L

Abstract:
1. A method of manufacturing a display device, the method comprising: forming a gate pattern for forming a gate line and a gate electrode connected to each other on a substrate; forming a data pattern for forming a data line insulated from and crossing the gate line, a source electrode connected to the data line and a drain electrode separated from the source electrode; forming a pixel electrode connected to the drain electrode; and forming a common electrode insulated from the pixel electrode, wherein at least one of the forming of the gate pattern and the forming of the data pattern includes: forming a metal layer on the substrate; and etching the metal layer using an etchant that includes, based on a total amount of the etchant: from about 0.5 to about 20 wt % of a persulfate; from about 0.01 to about 2 wt % of a fluorine compound; from about 1 to about 10 wt % of an inorganic acid; from about 0.5 to about 5 wt % of an azole compound; from about 0.1 to about 5 wt % of an electron-donating compound; from about 0.1 to about 5 wt % of a chlorine compound; from about 0.05 to about 3 wt % of a copper salt; from about 0.1 to about 10 wt % of an organic acid or an organic acid salt; and a remaining amount of water.