Antireflection film and method for manufacturing the same

Abstract

An objective of the present invention is to provide an antireflection film having a fine particle layer that is formed on a transparent substrate without allowing particles to aggregate as irregular lumps, while the region having no particles is being reduced to an area that is sufficiently small so as not to impair the visibility. In order to achieve the above-mentioned objective, the present invention provides an antireflection film that is characterized by having: a transparent substrate and a fine particle layer that is placed on the surface of the transparent substrate and made from at least a single layer of fine particles, wherein the surface of the transparent substrate and fine particles are allowed to adhere to each other by at least an electrostatic interaction, while the bulk of the above-mentioned fine particle layer is set to have a refractive index lower than the refractive index of the above-mentioned transparent substrate.

1 . A process for producing an antireflection film comprising: 
 a charge applying process for applying a charge on a surface of the transparent substrate;    a fine particle layer forming process for applying to the transparent substrate a fine particle dispersant containing fine particles having a surface charge the polarity of which is reversed to the charge applied to the surface of the transparent substrate to form a fine particle layer; and    a cleaning process for cleaning the transparent substrate on which the fine particle layer is formed    
     
     
         2 . The process for producing an antireflection film according to  claim 1 , wherein the charge applying process for applying a charge on the surface of the transparent substrate is a process which forms a polymer electrolyte film made of a multi-layered film formed by sequential deposition not less than two kinds of polymer electrolytes having mutually different polarities and/or a polymer electrolyte film made of a cross-linked polymer electrolyte, on the surface of the transparent substrate.  
     
     
         3 . A process for producing an antireflection film comprising: 
 a charge applying process for applying a charge on a substrate surface;    a fine particle layer forming process for applying to the transparent substrate a fine particle dispersant containing fine particles having a surface charge the polarity of which is reversed to the charge applied to the substrate surface to form a fine particle layer,    a cleaning process for cleaning the substrate on which the fine particle layer is formed; and    a transferring process for transferring the fine particle layer formed on the substrate onto the transparent substrate.    
     
     
         4 . The process for producing an antireflection film according to  claim 3 , wherein, in the transferring process, the adhesive means between the fine particles in the fine particle layer and the surface of the transparent substrate is prepared as at least one means selected from the group consisting of a means for irreversibly coupling the surface of the transparent substrate and the fine particles chemically, a means for fusing the surface of the transparent substrate and the fine particles, a means for forming a polymer thin film on the surface of the fine particle layer and a means for forming an adhesive layer on the surface of the transparent substrate and for allowing the fine particles to adhere to the adhesive layer.  
     
     
         5 . A process for producing an antireflection film comprising: 
 a charge applying process for applying a charge on a substrate surface;    a fine particle layer forming process for applying to the transparent substrate a fine particle dispersant containing fine particles having a surface charge the polarity of which is reversed to the charge applied to the substrate surface to form a fine particle layer,    a cleaning process for cleaning the substrate on which the fine particle layer is formed,    a printing plate forming process for forming a printing plate by molding a printing plate material using the fine particle layer on the transparent substrate cleaned in the cleaning process as an original plate, and    a fine particle duplicate layer forming process for forming a fine particle duplicate layer on the transparent substrate by using the printing plate manufactured through the printing plate forming process.    
     
     
         6 . The process for producing an antireflection film according to  claim 3 , 
 wherein the charge applying process for applying a charge to the substrate surface is a process for forming on the substrate surface a polymer electrolyte film made of a multi-layered film formed by sequential deposition at least not less than two kinds of polymer electrolytes having mutually different polarities and/or a polymer electrolyte film made of a cross-linked polymer electrolyte.    
     
     
         7 . The process for producing an antireflection film according to  claim 4 , 
 wherein the charge applying process for applying a charge to the substrate surface is a process for forming on the substrate surface a polymer electrolyte film made of a multi-layered film formed by sequential deposition at least not less than two kinds of polymer electrolytes having mutually different polarities and/or a polymer electrolyte film made of a cross-linked polymer electrolyte.    
     
     
         8 . The process for producing an antireflection film according to  claim 5 , 
 wherein the charge applying process for applying a charge to the substrate surface is a process for forming on the substrate surface a polymer electrolyte film made of a multi-layered film formed by sequential deposition at least not less than two kinds of polymer electrolytes having mutually different polarities and/or a polymer electrolyte film made of a cross-linked polymer electrolyte.