Patent ID: 9111813
Filing Date: 2015-08-18
Classification: C23F,H01L

Abstract:
1. A method for manufacturing a display device, comprising: forming a gate metal layer that includes a lower gate metal layer on an insulation substrate, and an upper gate metal layer on the lower gate metal layer; etching the gate metal layer using a copper-titanium etchant to form a gate line including a gate electrode; forming a gate insulating layer on the gate line; sequentially forming a first amorphous silicon layer on the gate insulating layer, a second amorphous silicon layer on the first amorphous silicon layer, a lower data metal layer on the second amorphous silicon layer, and an upper data metal layer on the lower data metal layer; etching the first amorphous silicon layer, the second amorphous silicon layer, the lower data metal layer and the upper data metal layer to form a semiconductor layer, an ohmic contact layer, a data line including a source electrode, and a drain electrode; forming a passivation layer on the data line, the drain electrode and the gate insulating layer; and forming a pixel electrode electrically connected to the drain electrode on the passivation layer, wherein the copper-titanium etchant includes 5 to 20 wt % of persulfate, 1 to 10 wt % of at least one compound of an inorganic acid, an inorganic acid salt, or a mixture comprising at least one of the foregoing, 0.3 to 5 wt % of a cyclic amine compound, 1 to 10 wt % of at least one compound of an organic acid, an organic acid salt, or a mixture comprising at least one of the foregoing, 0.1 to 5 wt % of p-toluenesulfonic acid, 0.01 to 2 wt % of a fluoride-containing compound, and water, based on the total weight of the etchant.