Substrate for liquid crystal display device, liquid crystal display device provided with the same, and manufacturing method of the same

A substrate for a liquid crystal display device, comprising:

• pixel regions arranged in a matrix form on a base substrate;
• a pixel electrode formed in each of the pixel regions;
• a plurality of gate bus lines formed on the base substrate in parallel with each other and in each of which plural formation materials are laminated and at least a lower layer part is formed of a same formation material as the pixel electrode;
• a plurality of drain bus lines intersecting with the gate bus lines through an insulating film and formed to be in parallel with each other;
• and
• a thin film transistor formed in each of the pixel regions and including a gate electrode connected to the gate bus line, a drain electrode connected to the drain bus line and a source electrode connected to the pixel electrode;
• wherein each of the drain bus lines includes a changeover region electrically connected to a layer made of the same formation material as the gate bus line through a layer made of the same formation material as the pixel electrode;
• wherein the insulating film is formed on substantially the whole metal wiring line outside a seal agent coated region.

A substrate for a liquid crystal display device, comprising:

• pixel regions arranged in a matrix form on a base substrate;
• a pixel electrode formed in each of the pixel regions;
• a plurality of gate bus lines formed on the base substrate in parallel with each other and in each of which plural formation materials are laminated and at least a lower layer part is formed of a same formation material as the pixel electrode;
• a plurality of drain bus lines intersecting with the gate bus lines through an insulating film and formed to be in parallel with each other;
• a thin film transistor formed in each of the pixel regions and including a gate electrode connected to the gate bus line, a drain electrode connected to the drain bus line and a source electrode connected to the pixel electrode;
• and
• a storage capacitor including a storage capacitor branch wiring line connected to a storage capacitor bus line, a storage capacitor electrode connected to the pixel electrode and the insulating film;
• wherein the storage capacitor branch wiring line is connected to the storage capacitor bus line through a layer made of the same formation material as the pixel electrode.

A substrate for a liquid crystal display device, comprising:

• pixel regions arranged in a matrix form on a base substrate;
• a pixel electrode formed in each of the pixel regions;
• a plurality of gate bus lines formed on the base substrate in parallel with each other and in each of which plural formation materials are laminated and at least a lower layer part is formed of a same formation material as the pixel electrode;
• a plurality of drain bus lines intersecting with the gate bus lines through an insulating film and formed to be in parallel with each other;
• a thin film transistor formed in each of the pixel regions and including a gate electrode connected to the gate bus line, a drain electrode connected to the drain bus line and a source electrode connected to the pixel electrode;
• and
• a storage capacitor including a storage capacitor branch wiring line connected to the gate bus line, a storage capacitor electrode connected to the pixel electrode and the insulating film;
• wherein the storage capacitor branch wiring line is connected to the gate bus line through a layer made of the same formation material as the pixel electrode.