Method for forming partitions of plasma display panel by using sandblasting process

Abstract

A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.

1. A method for forming partitions of a plasma display panel, the partitions dividing a discharge space of a plasma display panel, the method comprising the steps of:
 providing a sheet-like partition material on a substrate that is a panel material, the partition material covering a display area and a non- display area  outside thereof  of the display area on a surface of the substrate;  
 providing a mask for patterning on the partition material, the mask covering the display area and the outside thereof  non- display area  so that a pattern of the portion arranged in the display area of the mask corresponds to the partitions, and a pattern of the portion arranged in the non- display area  outside of the display area of the mask is a pattern for dividing a band-like portion along a rim of the display area as a grid  into a plurality of cells arranged in a plurality of rows and a plurality of columns;  
 patterning the partition material covered partially with the mask by a sandblasting process; and  
 baking the partition material after the patterning;  
   wherein a corner portion of the mask is arcuate .  
 
     
     
       2. The method for forming partitions of a plasma display panel according to  claim 1 , further comprising the steps of:
 providing the mask so as to cover the display area and both sides thereof in a first direction; and  
 moving a nozzle for ejecting a cutting material relatively to the partition material in the first direction in a reciprocating manner while patterning the partition material by the sandblasting process.  
 
     
     
       3. The method for forming partitions of a plasma display panel according to  claim 2 , further comprising the step of forming an auxiliary mask outside the mask in the first direction with a distance from the mask at the same time when forming the mask. 
     
     
       4. The method for forming partitions of a plasma display panel according to  claim 3 , wherein both ends of the auxiliary mask in a second direction that is perpendicular to the first direction protrudes from the mask. 
     
     
       5. The method for forming partitions of a plasma display panel according to  claim 4 , wherein the pattern of the auxiliary mask is a stripe pattern in which a plurality of long bands is arranged in parallel in the second direction. 
     
     
       6. The method for forming partitions of a plasma display panel according to  claim 4 , wherein the pattern of the auxiliary mask is a stripe pattern in which a plurality of long thin bands is arranged in parallel in the second direction and at least both ends of the band that is closest to the mask are not protruded from the mask. 
     
     
       7. The method for forming partitions of a plasma display panel according to  claim 4 , wherein the pattern of the auxiliary mask is a ring pattern that is oblong in the second direction. 
     
     
       8. The method for forming partitions of a plasma display panel according to  claim 1 , wherein a corner portion of the mask has an arcuate shape. 
     
     
       9. The method for forming partitions of a plasma display panel according to  claim 4 , wherein the pattern of the auxiliary mask is a pattern in which a plurality of bands that is shorter than the entire length of the display area in the second direction is arranged in parallel to each other as a plurality of discontinuous lines along the second direction. 
     
     
       10. The method for forming partitions of a plasma display panel according to  claim 9 , wherein discontinuous points are shifted from each other among the plural discontinuous lines in the pattern of the auxiliary mask. 
     
     
       11. The method for forming partitions of a plasma display panel according to  claim 9 , wherein the length of the band in the pattern of the auxiliary mask has a value within the range of 0.05-200 mm. 
     
     
       12. The method for forming partitions of a plasma display panel according to  claim 9 , wherein both the width and the length of the band in the pattern of the auxiliary mask have a value less than 240 μm. 
     
     
       13. The  A method for forming partitions of a plasma display panel according to  claim 1  , the partitions dividing a discharge space of a plasma display panel, the method comprising the steps of:
   providing a sheet - like partition material on a substrate that is a panel material, the partition material covering a display area and a non - display area outside of the display area on a surface of the substrate;    
   providing a mask for patterning on the partition material, the mask covering the display area and the non - display area so that a pattern of the portion arranged in the display area of the mask corresponds to the partitions, and a pattern of the portion arranged in the non - display area outside of the display area of the mask is a pattern for dividing a band - like portion along a rim of the display area as a grid;    
   patterning the partition material covered partially with the mask by a sandblasting process; and    
   baking the partition material after the patterning;   
 wherein at least the width of the band located at the most outside portion among the bands constituting a grid-like pattern of the portion arranged outside of the display area of the mask has a value within the range of 160-320 μm.  
 
     
     
       14. A method for forming partitions that divide a discharge space in each of plural plasma display panels simultaneously, the method comprising the steps of:
 providing a sheet-like partition material on a substrate that is a panel material on which display areas corresponding to the plural plasma display panels respectively are arranged linearly, the partition material covering the plural display areas and non- display areas  outside thereof  of the display areas on a surface of the substrate;  
 providing a mask for patterning on the partition material, the mask covering the inside and the outside of the display area for each display area, so that a pattern of the portion arranged in the display area of the mask corresponds to the partitions, and a pattern of the portion arranged in the non- display area  outside of the display area of the mask is a pattern for dividing a band-like portion along a rim of the display area as a grid;  
 forming an auxiliary mask at least between neighboring masks with a distance from the mask at the same time when forming the mask;  
 patterning the partition material covered partially with the mask and the auxiliary mask by a sandblasting process; and  
 baking the partition material after the patterning.  
 
     
     
       15. The method for forming partitions of a plasma display panel according to  claim 1 , wherein the arcuate corner portion of the mask is continuously curved. 
     
     
       16. The method for forming partitions of a plasma display panel according to  claim 1 , wherein an inside of a part of one of the cells in the corner portion of the mask has a continuously curved shape.