Patent ID: 7638253
Filing Date: 2009-12-29
Classification: G03F,H01L

Abstract:
1. A method of manufacturing a thin-film transistor substrate, the method comprising: sequentially forming a gate insulation layer, an active layer and a data metal layer on a base substrate having a gate line and a gate electrode; coating a photoresist composition on the data metal layer to form a photoresist film, the photoresist composition comprising: about 1 to about 70 parts by weight of a first binder resin for increasing heat resistance and including a repeat unit represented by about 1 to about 70 parts by weight of a second binder resin for increasing adhesion ability and containing a repeat unit represented by wherein R about 0.5 to about 10 parts by weight of a photo-acid generator; about 1 to about 20 parts by weight of a cross-linker; and about 10 to about 200 parts by weight of a solvent; exposing the photoresist film to light and developing the photoresist film to form a first photoresist pattern; etching the data metal layer and the active layer using the first photoresist pattern as a mask to form a data line and a channel portion, respectively; removing a portion of the first photoresist film to form a second photoresist pattern exposing a portion of the data metal layer; and etching the data metal layer and the active layer using the second photoresist pattern as a mask to form a source electrode, a drain electrode and an ohmic contact pattern.