Thin film transistor substrate of a horizontal electric field type and method of darkening defective pixel in the same
View Patent ↗A method of darkening a defective pixel including a short between a source electrode and a drain electrode in a thin film transistor substrate includes forming a gate line and a data line on a substrate to define a pixel region; forming a thin film transistor at a crossing of the gate line and the data line, the thin film transistor having a gate electrode, a source electrode and a drain electrode; forming a pixel electrode and a common electrode in the pixel region; forming a common line provided in parallel to the gate line and connected to the common electrode; forming an extended part of the drain electrode in parallel to the gate line; and cutting the extended part along a cutting line.
1. A method of darkening a defective pixel including a short between a source electrode and a drain electrode in a thin film transistor substrate, the method comprising:
forming a gate line and a data line on a substrate to define a pixel region;
forming a thin film transistor at a crossing of the gate line and the data line, the thin film transistor having a gate electrode, a source electrode and a drain electrode;
forming a pixel electrode and a common electrode in the pixel region;
forming a common line provided in parallel to the gate line and connected to the common electrode;
forming an extended part of the drain electrode in parallel to the gate line; and
cutting the extended part along a cutting line.
2. The method of claim 1 , wherein the cutting line includes a first space and a second space.
3. The method of claim 2 , wherein the first space is positioned between the gate line and a first corner area of the common electrode and the second space is positioned between the gate electrode and a second corner area of the common electrode.
4. The method of claim 2 , wherein the first space is between a first inclined portion of the gate line adjacent to the data line and a second inclined portion of the first corner area of the common electrode.
5. The method of claim 2 , wherein the second space is positioned between a horizontal side of the gate electrode and a second inclined side of a second corner area of the common electrode opposed thereto.
6. The method of claim 1 , wherein the gate electrode has a vertical side and an inclined side protruding from the gate line and a horizontal side connecting the vertical side to the inclined side.
7. The method of claim 1 , wherein the extended part of the drain electrode overlaps the common electrode.
8. The method of claim 1 , wherein the pixel electrode and the common electrode have a zig-zag shape.
9. The method of claim 1 , wherein the pixel electrode has a first horizontal part, a finger part, and a second horizontal part.
10. The method of claim 9 , wherein the first horizontal part overlaps the extended part of the drain electrode.
11. The method of claim 9 , wherein the second horizontal part overlaps the common line.
12. The method of claim 1 , wherein the common electrode has a finger part and a horizontal part.
13. The method of claim 12 , wherein the horizontal part overlaps the extended part of the drain electrode.
14. The method of claim 12 , wherein the finger part includes a first portion having a zig-zag shape and a second portion having a linear shape along the data line.
15. The method of claim 1 , wherein cutting the extended part includes using a laser.
16. The method of claim 1 , wherein the cutting line includes a first oblique portion originating at a start point, a second portion cutting through the extended part of the drain electrode in a direction substantially parallel to the gate line, and a third oblique portion terminating at an end point.
17. The method of claim 16 , further including narrowing a vertical width of the gate line along an inclined side thereof near the data line.
18. The method of claim 16 , further including forming a separation between an horizontal side of the gate electrode and an inclined side of the common electrode opposed thereto.