Method of manufacturing a display device

Abstract

In a display device in which a display material is enclosed in a gap between bonded glass substrates and in a method of manufacturing the same, in order to use a conventional method of scratching the surfaces of the glass substrates to divide them into cells, sodium atoms on the surface of the glass substrate having a thickness of not larger than 2 mm are replaced with atoms having an ion radius larger than that of sodium to form a chemically reinforced layer having a thickness of not larger than 20 μm. According to this display device and this method of manufacturing the same, the strength of a flat display device used in a portable electric equipment can be easily improved.

What is claimed is:  
     
         1 . A display device comprising: 
 a pair of glass substrates, an electrode being formed on the surface of each of said glass substrates, and said glass substrates being opposite to each other; and    a display material enclosed in a gap between said glass substrates;    wherein a chemically reinforced layer having a thickness of not larger than 20 μm is formed on the surface of at least one of said glass substrates.    
     
     
         2 . A method of manufacturing a display device, comprising: 
 a chemical reinforcing treatment step of immersing a glass substrate in a solution or a molten solution of salt containing positive ions having an ion radius larger than that of sodium so that a chemically reinforced layer having a thickness of not larger than 20 μm is formed on said glass substrate.    
     
     
         3 . A method of manufacturing a display device, comprising the steps of: 
 immersing a glass substrate having a thickness of not larger than 2 mm in a solution or a molten solution of salt containing position ions having an ion radius larger than that of sodium;    forming a chemically reinforced layer having a thickness of not larger than 20 μm on said glass substrate;    fabricating a plurality of cells made of a pair of glass substrates by using said glass substrate on which said chemically reinforced layer has been formed;    scratching the surface of said glass substrate on which said chemically reinforced layer has been formed; and    cutting said glass substrate so that said cells are divided into individual ones.