Display device and manufacturing method thereof

Abstract

In a display device using an organic light emitting diode (OLED), the occurrence or a dark spot and peeling of a cathode due to moisture are suppressed. An outer edge portion of a sealing substrate (second substrate) ( 102 ) is made to have a convex shape and a gap between the sealing substrate and an element substrate are controlled by means of this convex region. Thus, since it is not required that a layer ( 106 ) having adhesion for bonding together the sealing substrate and the element substrate has a function for controlling the gap, the thickness of the layer can be minimized. Therefore, the amount of moisture which is transmitted through the layer (having adhesion) made of an organic material and penetrated in a sealed region can be reduced.

1 - 48 . (canceled)  
   
   
       49 . A mobile telephone comprising: 
 a display panel, the display panel comprising:    a first substrate;    an organic light emitting element over the first substrate; and    a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,    wherein minute unevennesses are formed on a surface of the second substrate.    
   
   
       50 . A mobile telephone according to  claim 49 , wherein height of the minute unevennesses is set to be 0.1 μm to 3 μm.  
   
   
       51 . A mobile telephone according to  claim 49 , wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μm to 1 μm.  
   
   
       52 . A mobile telephone according to  claim 49 , wherein the first and second substrates are glass substrates.  
   
   
       53 . A mobile telephone according to  claim 49 , wherein a thickness of the layer having adhesion is 10 μm or less.  
   
   
       54 . A digital camera comprising: 
 a display panel, the display panel comprising:    a first substrate;    an organic light emitting element over the first substrate; and    a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,    wherein minute unevennesses are formed on a surface of the second substrate.    
   
   
       55 . A digital camera according to  claim 54 , wherein height of the minute unevennesses is set to be 0.1 μm to 3 μm.  
   
   
       56 . A digital camera according to  claim 54 , wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μm to 1 μm.  
   
   
       57 . A digital camera according to  claim 54 , wherein the first and second substrates are glass substrates.  
   
   
       58 . A digital camera according to  claim 54 , wherein a thickness of the layer having adhesion is 10 μm or less.  
   
   
       59 . A mobile telephone comprising: 
 a display panel, the display panel comprising:    a first substrate;    an organic light emitting element over the first substrate; and    a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,    wherein minute unevennesses are formed on a surface of the second substrate, and    wherein a surface of the second substrate opposing the first substrate comprises a first thickness at a first region and a second thickness at a second region, the first region is adhered with the layer having adhesion, and the second region is located inside the first region and concaved relative to the first region.    
   
   
       60 . A mobile telephone according to  claim 59 , wherein height of the minute unevennesses is set to be 0.1 μm to 3 μm.  
   
   
       61 . A mobile telephone according to  claim 59 , wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μm to 1 μm.  
   
   
       62 . A mobile telephone according to  claim 59 , wherein the first and second substrates are glass substrates.  
   
   
       63 . A mobile telephone according to  claim 59 , wherein a thickness of the layer having adhesion is 10 μm or less.  
   
   
       64 . A digital camera comprising: 
 a display panel, the display panel comprising:    a first substrate;    an organic light emitting element over the first substrate; and    a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,    wherein minute unevennesses are formed on a surface of the second substrate, and    wherein a surface of the second substrate opposing the first substrate comprises a first thickness at a first region and a second thickness at a second region, the first region is adhered with the layer having adhesion, and the second region is located inside the first region and concaved relative to the first region.    
   
   
       65 . A digital camera according to  claim 64 , wherein height of the minute unevennesses is set to be 0.1 μm to 3 μm.  
   
   
       66 . A digital camera according to  claim 64 , wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μm to 1 μm.  
   
   
       67 . A digital camera according to  claim 64 , wherein the first and second substrates are glass substrates.  
   
   
       68 . A digital camera according to  claim 64 , wherein a thickness of the layer having adhesion is 10 μm or less.  
   
   
       69 . A mobile telephone comprising: 
 a display panel, the display panel comprising:    a first substrate;    an organic light emitting element over the first substrate; and    a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,    wherein minute unevennesses are formed on a surface of the second substrate,    wherein a surface of the second substrate opposing the first substrate comprises a first region, a second region, and a third region, the first region is adhered with the layer having adhesion, the second region is located inside the first region and concaved relative to the first region, the third region is located inside the second region and concaved relative to the second region, and    wherein a dry agent is provided in the third region.    
   
   
       70 . A mobile telephone according to  claim 69 , wherein height of the minute unevennesses is set to be 0.1 μm to 3 μm.  
   
   
       71 . A mobile telephone according to  claim 69 , wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μm to 1 μm.  
   
   
       72 . A mobile telephone according to  claim 69 , wherein the first and second substrates are glass substrates.  
   
   
       73 . A mobile telephone according to  claim 69 , wherein a thickness of the layer having adhesion is 10 μm or less.  
   
   
       74 . A digital camera comprising: 
 a display panel, the display panel comprising:    a first substrate;    an organic light emitting element over the first substrate; and    a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,    wherein minute unevennesses are formed on a surface of the second substrate,    wherein a surface of the second substrate opposing the first substrate comprises a first region, a second region, and a third region, the first region is adhered with the layer having adhesion, the second region is located inside the first region and concaved relative to the first region, the third region is located inside the second region and concaved relative to the second region, and    wherein a dry agent is provided in the third region.    
   
   
       75 . A digital camera according to  claim 74 , wherein height of the minute unevennesses is set to be 0.1 μm to 3 μm.  
   
   
       76 . A digital camera according to  claim 74 , wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μm to 1 μm.  
   
   
       77 . A digital camera according to  claim 74 , wherein the first and second substrates are glass substrates.  
   
   
       78 . A digital camera according to  claim 74 , wherein a thickness of the layer having adhesion is 10 μm or less.