Patent ID: 8093594

Claim:
A display substrate, comprising: an insulating substrate; a thin film transistor arranged on the insulating substrate, the thin film transistor comprising a control electrode, a semiconductor pattern, a first electrode, and a second electrode spaced apart from the first electrode; a contact electrode, the contact electrode comprising: a first end opposite the first electrode and electrically connected to the second electrode, and a second end comprising: a contact portion electrically connected to the second electrode, the contact portion exposing a portion of the semiconductor pattern; and an undercut portion electrically connected to the contact portion, the undercut portion extending beyond an edge of the semiconductor pattern; and a pixel electrode electrically connected to the contact portion of the contact electrode, wherein the control electrode is arranged on the insulating substrate, the semiconductor pattern is arranged on the control electrode, and the first electrode and the second electrode are arranged on the semiconductor pattern, wherein an edge of the contact portion and an edge of the undercut portion form a substantially straight line that forms an angle of about 5 degrees to about 60 degrees with respect to an interface between the second electrode and the contact electrode.