Plasma display and method for producing the same

Abstract

A plasma display device has a first plate and a second plate which face each other with a discharge space therebetween, and a sealing member which is provided between the first and second plates to seal the discharge space at edges of the first and second plates. A plurality of electrodes are formed on the inner major surface of the first or second plate. An electrode diffusion preventive layer is formed in each area where the plurality of electrodes cross over the sealing member, so as to avoid direct contact between the plurality of electrodes and the sealing member. As a result, problems such as breaking of the electrodes can be avoided. This construction is especially effective when the electrodes contain Ag.

1. A plasma display device having a first plate and a second plate which face each other with a discharge space in between, and a sealing member which is provided between the first and second plates so as to seal the discharge space at edges of the first and second plates, the plasma display device comprising:
 a plurality of electrodes, each including Ag, which are formed across an inner major surface of one of the first and second plates, and  
 an electrode diffusion preventive layer which includes glass and an oxide filler is interposed between the sealing member and each of the plurality of electrodes,  
 wherein the electrode diffusion preventive layer is formed from a dielectric material whose softening point is higher than a melting point of the sealing member  temperature at which the sealing member melts.  
 
     
     
       2. The plasma display device of  claim 1 ,
 wherein the softening point of the electrode diffusion preventive layer is at least 50° C. higher than the melting point of the sealing member  temperature at which the sealing member melts.  
 
     
     
       3. The plasma display device of  claim 1 ,
 wherein the softening point of the electrode diffusion preventive layer is no lower than 300° C.  
 
     
     
       4. A plasma display device comprising:
 a plurality of first electrodes each including Ag which are formed across a major surface of a first plate;  
 a first dielectric layer which is formed on the major surface of the first plate on which the plurality of first electrodes have been formed, the first plate and a second plate being set so that the first dielectric layer faces the second plate with a discharge space in between; and  
 a sealing member which is provided between the first and second plates so as to seal the discharge space at edges of the first and second plates,  
 wherein the first dielectric layer includes glass and an oxide filler, has a softening point that is higher than a melting point of the sealing member  temperature at which the sealing member melts, and  
 the first dielectric layer is extended and interposed between the sealing member and each of the plurality of first electrodes.  
 
     
     
       5. The plasma display device of  claim 4 ,
 wherein the softening point of the first dielectric layer is at least 50° C. higher than the melting point of the sealing member  temperature at which the sealing member melts.  
 
     
     
       6. The plasma display device of  claim 4 , further comprising:
 a plurality of second electrodes which are formed across a major surface of the second plate; and  
 a second dielectric layer which has a softening point higher than the melting point of the sealing member  temperature at which the sealing member melts and is formed on the major surface of the second plate on which the plurality of second electrodes have been formed,  
 wherein the second dielectric layer is extended and interposed between the sealing member and each of the plurality of second electrodes.  
 
     
     
       7. The plasma display device of  claim 6 ,
 wherein each of the plurality of second electrodes includes Ag.  
 
     
     
       8. The plasma display device of  claim 6 ,
 wherein the second dielectric layer includes glass and an oxide filler.  
 
     
     
       9. The plasma display device of  claim 8 ,
 wherein the oxide filler includes at least one of SiN and SiO2.  
 
     
     
       10. The plasma display device of  claim 6 ,
 wherein a principal component of the second dielectric layer is a glass material having a softening point of no lower than 300° C.  
 
     
     
       11. The plasma display device of  claim 6 ,
 wherein the softening point of the second dielectric layer is at least 50° C. higher than the melting point of the sealing member  temperature at which the sealing member melts.  
 
     
     
       12. A manufacturing method for a plasma display device having a sealing member forming step for providing a sealing member between a first plate and a second plate which face each other with a discharge space in between, so that the discharge space is sealed at edges of the first and second plates, the manufacturing method comprising the following steps which are performed in the stated order before the sealing member forming step:
 an electrode forming step for forming a plurality of electrodes including Ag across an inner major surface of one of the first and second plates; and  
 an electrode diffusion preventive layer forming step for interposing an electrode diffusion preventive layer including glass and an oxide filler between the sealing member and each of the plurality of electrodes,  
 wherein the electrode diffusion preventive layer forming step forms the electrode diffusion preventive layer from a dielectric material whose softening point is higher than a melting point of the sealing member  temperature at which the sealing member melts in the sealing member forming step.  
 
     
     
       13. The manufacturing method of  claim 12 ,
 wherein the electrode diffusion preventive layer forming step forms the electrode diffusion preventive layer whose softening point is at least 50° C. higher than the melting point of the sealing member  temperature at which the sealing member melts in the sealing member forming step.  
 
     
     
       14. The manufacturing method of  claim 12 ,
 wherein the electrode diffusion preventive layer forming step forms the electrode diffusion preventive layer whose softening point is no lower than 300° C.  
 
     
     
       15. A manufacturing method for a plasma display device comprising:
 a first electrode forming step for forming a plurality of first electrode including Ag across a major surface of a first plate;  
 a first dielectric layer forming step for forming a first dielectric layer including glass and an oxide filler on the major surface of the first plate on which the plurality of first electrodes have been formed; and  
 a sealing member forming step for providing a sealing member between the first plate and a second plate which are set with the first dielectric layer facing the second plate with a discharge space in between, so that the discharge space is sealed at edges of the first and second plates,  
 wherein in the first dielectric layer forming step, the first dielectric layer is formed from a material whose softening point is higher than a melting point of the sealing member  temperature at which the sealing member melts in the sealing member forming step, and the first dielectric layer is extended and interposed between the sealing member and each of the plurality of first electrodes.  
 
     
     
       16. The manufacturing method of  claim 15 , further comprising:
 a second electrode forming step for forming a plurality of second electrodes across a major surface of the second plate; and  
 a second dielectric layer forming step for forming a second dielectric layer on the major surface of the second plate on which the plurality of second electrodes have been formed,  
 wherein in the second dielectric layer forming step, the second dielectric layer is formed from a material whose softening point is higher than the melting point of the sealing member  temperature at which the sealing member melts in the sealing member forming step, and the second dielectric layer is extended and interposed between the sealing member and each of the plurality of second electrodes.  
 
     
     
       17. The manufacturing method of  claim 16 ,
 wherein the second electrode forming step forms the plurality of second electrodes using Ag.  
 
     
     
       18. The manufacturing method of  claim 16 ,
 wherein the second dielectric layer forming steps forms the second dielectric layer from a material that includes glass and an oxide filler.  
 
     
     
       19. A manufacturing method for a plasma display device having a sealing member forming step for providing a sealing member between a first plate and a second plate which face each other with a discharge space in between, so that the discharge space is sealed at edges of the first and second plates, the manufacturing method comprising:
   an electrode forming step for forming a plurality of electrodes that includes Ag across a major surface of one of the first and second plates;        an electrode diffusion preventive layer forming step for providing an electrode diffusion preventive layer including glass and an oxide filler onto the major surface of one of the first and second plates; and        a sealing member forming step for providing a sealing member onto the electrode diffusion preventive layer, setting the first plate and the second plate so that the electrode diffusion preventive layer faces the second plate with a discharge space in between, and sintering the first plate and the second plate so that the discharge space is sealed at edges of the first and second plates,        wherein the electrode diffusion preventive layer forming step forms the electrode diffusion preventive layer from a dielectric material whose softening point is higher than a temperature at which the sealing member melts while sintering the first plate and the second plate in the sealing member forming step.     
     
     
       20. The manufacturing method of  claim 19 , wherein the electrode diffusion preventive layer forming step forms the electrode diffusion preventive layer whose softening point is at least  50 ° C. higher than the temperature at which the first plate and the second plate are sintered in the sealing member forming step. 
     
     
       21. The manufacturing method of  claim 19 , wherein the electrode diffusion preventive layer forming step forms the electrode diffusion preventive layer whose softening point is no lower than  300 ° C. 
     
     
       22. A manufacturing method for a plasma display device comprising:
   a first electrode forming step for forming a plurality of first electrodes that include Ag across a major surface of a first plate;        a first dielectric layer forming step for forming a first dielectric layer including glass and an oxide filler on the major surface of the first plate on which the plurality of first electrodes have been formed; and        a sealing member forming step for providing a sealing member onto the first plate or a second plate, setting the first plate and the second plate so that the first dielectric layer faces the second plate with a discharge space in between, and sintering the first plate and the second plate at a temperature so that the discharge space is sealed at edges of the first and second plates,        wherein in the first dielectric layer forming step, the first dielectric layer is formed from a material whose softening point is higher than a temperature at which the sealing member melts while sintering the first plate and the second plate in the sealing member forming step, and the first dielectric layer is extended and interposed between the sealing member and each of the plurality of first electrodes.     
     
     
       23. The manufacturing method of  claim 22 , further comprising:
   a second electrode forming step for forming a plurality of second electrodes across a major surface of the second plate; and a second dielectric layer forming step for forming a second dielectric layer on the major surface of the second plate on which the plurality of second electrodes have been formed, wherein in the second dielectric layer forming step, the second dielectric layer is formed from a material whose softening point is higher than the temperature at which the first plate and the second plate are sintered in the sealing member forming step, and the second dielectric layer is extended and interposed between the sealing member and each of the plurality of second electrodes.     
     
     
       24. The manufacturing method of  claim 23 , wherein the second electrode forming step forms the plurality of second electrodes using Ag. 
     
     
       25. The manufacturing method of  claim 23 , wherein the second dielectric layer forming step forms the second dielectric layer from a material that includes glass and an oxide filler.