Black matrix

Abstract

There is provided a method of manufacturing a color display including a color filter and a black matrix, characterized in that it comprises the steps of: forming a film of zinc oxide on a transparent substrate; forming the the color filter on the said film of zinc oxide; and thereafter, applying a deposit of electroless copper plating on an area of the said film of zinc oxide on which the said color filter is not formed, the said deposit having a thickness which is substantially equal to a thickness of the said color filter and constituting an element of said black matrix. Thus, a color display may be provided with a black matrix that is of high optical density and a low reflectivity. The black matrix can also be commensurate with film thickness with the color matrix. No photo lithographic process is required in preparing the color filter and black matrix. Various modified forms of embodiments of the method of manufacturing a color display are also disclosed.

What is claimed is:  
     
         1 . A method of manufacturing a color display including a color filter and a black matrix, characterized in that said black matrix is prepared by the steps of: 
 forming a film of zinc oxide on a transparent substrate; and    applying a deposit of electroless copper plating onto said film of zinc oxide while utilizing an catalytic action by palladium chloride, said deposit constituting an element of said black matrix.    
     
     
         2 . A method as set forth in    claim 1   , characterized in that a thin film of copper oxide is formed on a surface of said deposit of electroless plating.  
     
     
         3 . A method as set forth in    claim 1   , characterized in that said film of zinc oxide is doped with aluminum and is then used to serve as a transparent electroplating electrode as well.  
     
     
         4 . A method as set forth in    claim 2   , characterized in that said film of zinc oxide is doped with aluminum and is then used to serve as a transparent electroplating electrode as well.  
     
     
         5 . A method as set forth in    claim 1   , characterized in that said transparent substrate is a glass substrate.  
     
     
         6 . A method as set forth in    claim 5   , characterized in that said glass substrate is made up of a soda glass.  
     
     
         7 . A method as set forth in    claim 1   , characterized in that said transparent substrate is made up of an organic film.  
     
     
         8 . A method as set forth in    claim 7   , characterized in that said organic film is a polyester film.  
     
     
         9 . A method as set forth in    claim 1   , characterized in that a driver integrated circuit is connected through a solder bump to said electrolessly plated copper deposit.  
     
     
         10 . A method of manufacturing a color display including a color filter and a black matrix, characterized in that it comprises the steps of: 
 forming a film of zinc oxide on a transparent substrate;    forming said color filter on said film of zinc oxide; and    thereafter, applying a deposit of electroless copper plating on an area of said film of zinc oxide on which said color filter is not formed, said deposit having a thickness which is substantially equal to a thickness of said color filter and constituting an element of said black matrix.    
     
     
         11 . A method as set forth in    claim 10   , characterized in that a thin film of copper oxide is formed on a surface of said deposit of electroless plating.  
     
     
         12 . A method as set forth in    claim 10   , characterized in that said film of zinc oxide is doped with aluminum and is then used to serve as a transparent electroplating electrode as well.  
     
     
         13 . A method as set forth in    claim 11   , characterized in that said film of zinc oxide is doped with aluminum and is then used to serve as a transparent electroplating electrode as well.  
     
     
         14 . A method as set forth in    claim 10   , characterized in that said transparent substrate is a glass substrate.  
     
     
         15 . A method as set forth in    claim 14   , characterized in that said glass substrate is made up of a soda glass.  
     
     
         16 . A method as set forth in    claim 10   , characterized in that said transparent substrate is made up of an organic film.  
     
     
         17 . A method as set forth in    claim 16   , characterized in that said organic film is a polyester film.  
     
     
         18 . A method as set forth in    claim 10   , characterized in that a driver integrated circuit is connected through a solder bump to said electrolessly plated copper deposit.  
     
     
         19 . A method of manufacturing a color display including a color filter and a black matrix, characterized in that said color filter is prepared by the steps of: 
 forming a first film that is of a first color filter element of a first color which is selected from three colors: red R, blue B and green G over a surface of a glass substrate, and dividing, by means of eximer laser machining, said first film into a plurality of color filter regions of said first color;    forming a second film that is of a second color filter element of a second color which has not been selected from said three colors: R, B and G over such a surface of said glass substrate as is exposed among said first color filter regions of the first color as a result of division of said first film, and dividing, by means of eximer laser machining, said second film into a plurality of color filter regions of said second color; and    forming a third film that is of a third color filter element of a third color which has not been selected from said three colors and which is other than said first and second colors, over such a surface of said glass substrate as is exposed among said first and second color filter regions divided from said first and second films, and dividing, by means of eximer laser, said third film into a plurality of color filter regions of said third color, thereby forming over the surface of said substrate a color filter which consists of a plurality of red R color filter elements, a plurality of blue B color filter elements and a plurality of green G color filter elements.    
     
     
         20 . A method of manufacturing a color display including a color filter and a black matrix, characterized in that said color filter is prepared by the steps of: 
 a) coating a surface of a glass substrate with a transparent electrode;    b) forming a transparent film of a ferroelectric substance on said transparent electrode;    c) partially polarizing and charging said transparent film of the ferroelectric substance in color filter forming regions thereof of a particular color;    d) depositing on said polarized and charged transparent film of the ferroelectric substance a color filter pigment of said particular color that is reversely polarized and charged; and    e) repetitively performing the steps c) and d) for said color filter forming regions with respect to a red R, a blue B and a green G color as said particular color.    
     
     
         21 . A method as set forth in    claim 20   , characterized in that it comprises the steps of: 
 providing a black matrix forming region in said transparent film of the ferroelectric substance that is formed on said transparent electrode;    forming a polarization and charging preventive film on said black matrix forming region;    forming an electrolessly plated copper film on said polarization and charging preventive film; and    oxidizing at least partially said electrolessly plated copper film.    
     
     
         22 . A method of manufacturing a color display including a color filter and a black matrix, characterized in that said black matrix is prepared by the steps of: 
 coating a surface of a glass substrate with a transparent electrode;    forming a color filter on said transparent electrode;    forming on a surface portion of said transparent electrode which has not been formed thereon with said color filter and which is thus exposed a film of zinc oxide with said transparent electrode serving as an electrically conducting terminal;    forming an electrolessly plated copper film on said film of zinc oxide; and    oxidizing at least partially said electrolessly plated copper film.    
     
     
         23 . A method of manufacturing a color display including a color filter, a black matrix and a cell gap controlling spacer arrangement, characterized in that said spacer arrangement is prepared by the steps of: 
 forming a glass substrate with a color filter having an uppermost layer constituted of a transparent electrode;    forming a photo resist pattern on said transparent electrode while using a mask for forming a spacer;    forming a plurality of columnar spacers each composed of transparent zinc oxide by using a solution electrolysis process; and    coating a surface of each of said spacers with an insulating film of zinc oxide.