Thin film transistor array substrate and repairing method thereof

Abstract

A thin film transistor (TFT) array substrate including a substrate, a plurality of scan lines, a plurality of data lines, a plurality of thin film transistors, a plurality of pixel electrodes and a repairing circuit is provided. The scan lines and the data lines are disposed over the substrate, therefore a plurality of pixel areas are defined. Each thin film transistor is disposed in each pixel area respectively and driven by the corresponding scan line and data line. Each pixel electrode is disposed in each pixel area respectively and electrically connected to the corresponding thin film transistor. A repairing method for TFT array substrate is also provided. The method includes connecting the repairing circuit and the defect scan line besides the break to repair and convert the line defect into two-point defect, single defect, or totally repair the line defect.

1 . A repairing method of a thin film transistor (TFT) array substrate, for repairing a TFT array substrate comprising a storage capacitor on a gate or a storage capacitor on a common line, the repairing method comprising: 
 removing a portion of at least one pixel electrode adjacent to a break of a scan line or a common line; and    forming a repairing circuit over the break to electrically connect the repairing circuit and the scan line at two sides of the break, or electrically connect the repairing circuit and the common line at two sides of the break, wherein the repairing circuit is electrically insulated with the pixel electrodes.    
   
   
       2 . The repairing method of  claim 1 , wherein the break of the scan line or the common line is between two data lines and a step of removing the portion of the at least one pixel electrode comprises: 
 forming an opening corresponding to the break in the pixel electrode, wherein the repairing circuit is disposed in the opening, and electrically connected to the scan line or the common line at two sides of the break.    
   
   
       3 . The repairing method of  claim 1 , wherein the break of the scan line or the common line is under a data line and a step of removing the portion of the at least one pixel electrode comprises: 
 forming a gap at an edge of two pixel electrodes adjacent to the break respectively, wherein the repairing circuit is crossed over the data line and is in the gap.    
   
   
       4 . The repairing method of  claim 1 , wherein a method of removing the portion of the at least one pixel electrode comprises laser removing method.  
   
   
       5 . The repairing method of  claim 1 , wherein a method of forming the repairing circuit comprises laser chemical vapor deposition (CVD) method.  
   
   
       6 . A repairing method of a thin film transistor (TFT) array substrate, for repairing a TFT array substrate comprising a storage capacitor on a gate or a storage capacitor on a common line, the repairing method comprising: 
 removing a portion of at least one pixel electrode adjacent to a break of a scan line or a common line to electrically connect a portion of the pixel electrode with the scan line or the common line at two sides of the break.    
   
   
       7 . The repairing method of  claim 6 , wherein the break of the scan line or the common line is between two data lines, and a step of removing the portion of the at least one pixel electrode comprises: 
 cutting the pixel electrode to divide the pixel electrode into a displaying portion and a repairing portion, wherein the displaying portion and the repairing portion are electrically insulated mutually, and the repairing portion is electrically connected to the scan line or the common line at two sides of the break.    
   
   
       8 . The repairing method of  claim 6 , wherein the break of the scan line or the common line is under a data line, and a step of removing the portion of the at least one pixel electrode comprises: 
 cutting the pixel electrode to divide the pixel electrode into a displaying portion and a repairing portion, wherein the displaying portion and the repairing portion are electrically insulated mutually; and    forming a repairing circuit over the break, wherein the repairing circuit and the repairing portion are electrically connected to the scan line or the common line at two sides of break.    
   
   
       9 . The repairing method of  claim 6 , wherein a method of removing the portion of the at least one pixel electrode comprises laser removing method.  
   
   
       10 . The repairing method of  claim 6 , wherein a method of forming the repairing circuit comprises laser chemical vapor deposition (CVD) method.  
   
   
       11 . A repairing method of a thin film transistor (TFT) array substrate, for repairing a TFT array substrate comprising a storage capacitor on a gate or a storage capacitor on a common line, the repairing method comprising: 
 electrically connecting at least one pixel electrode adjacent to a break of a scan line or a common line to the scan line or the common line at two sides of the break.    
   
   
       12 . The repairing method of  claim 11 , wherein the break of the scan line or the common line is under a data line, further comprises: 
 forming a repairing circuit over the break, wherein the repairing circuit and two pixel electrodes adjacent to the break are electrically connected to the scan line or the common line at two sides of the break.    
   
   
       13 . The repairing method of  claim 11 , wherein a method of electrically connecting the repairing circuit and the two pixel electrodes adjacent to the break with the scan line or the common line at the two sides of the break comprises laser welding method.