Gate driving circuit, liquid crystal display having the same, and manufacturing method for thin film transistor substrate

A liquid crystal display comprising:

• a liquid crystal display panel including gate lines and data lines;
• a data driving circuit to drive the data lines;
• and
• a gate driving circuit formed with a plurality of stages to drive the gate lines, wherein each stage comprises a gate pad formed at one end of a gate line;
• a pull-up transistor outputting a gate driving signal for driving the gate line;
• a capacitor formed with a dielectric substance disposed between a first electrode connected to a gate electrode of the pull-up transistor and a second electrode connected to a drain electrode of the pull-up transistor;
• a first connecting electrode connecting the gate pad to the second electrode;
• a holding transistor connected to the pull-up transistor to maintain a voltage level of the gate driving signal;
• a switching transistor connected to the pull-up transistor and the capacitor to control the holding transistor through the gate driving signal;
• and a second connecting electrode connecting the second electrode to the gate electrode of the switching transistor.

A method of manufacturing a thin film transistor substrate, comprising:

• forming a gate metal pattern including a gate line, a gate pad, a first electrode, a contact portion, a signal supply line, and a gate electrode on a substrate;
• forming an insulating layer on the gate metal layer;
• forming a semiconductor layer including an active layer and an ohmic contact layer on the insulating layer;
• forming a data metal pattern including a second electrode and a drain electrode on the semiconductor layer;
• forming a protecting layer on the data metal layer and forming a contact hole to expose the second electrode, the gate pad, the contact portion, and the drain electrode;
• and
• forming a connecting electrode and a pixel electrode connected to the second electrode, the gate pad, the contact portion and the drain electrode exposed through the contact hole.