Touch screen panel and fabricating method thereof

Abstract

A method of making a touch screen panel includes providing a substrate assembly and a multi-layered film. The substrate assembly includes a substrate, and first and second sensing electrodes formed over the substrate. The multi-layered film includes a first conductive photosensitive layer, a second conductive photosensitive layer, and an insulation photosensitive layer. The insulation photosensitive layer has a light sensitivity different from that of at least one of the first and second conductive photosensitive layers. The method further includes forming insulators by exposing and developing the insulation photosensitive layer, and forming bridges and insulators by exposing and developing the second conductive photosensitive layer. The substrate assembly and the multi-layered film are assembled to form the touch panel.

What is claimed is: 
     
         1 . A method of making a touch screen panel, comprising:
 providing a substrate assembly comprising a substrate and first sensing electrodes formed over the substrate and extending along a first direction;   providing a multi-layered film comprising a first conductive photosensitive layer and a second conductive photosensitive layer, the first conductive photosensitive layer having a light sensitivity different from that of the second conductive photosensitive layer;   forming second sensing electrodes extending along a second direction by exposing and developing the second conductive photosensitive layer; and   laminating the substrate assembly and a multi-layered film comprising the second sensing electrodes such that the second direction intersects the first direction when viewed in a thickness direction of the substrate.   
     
     
         2 . The method according to  claim 1 , wherein the second conductive photosensitive layer has a light sensitivity higher than that of the first conductive photosensitive layer. 
     
     
         3 . The method according to  claim 2 , wherein the multi-layered film further comprises an insulation photosensitive layer between the first and second conductive photosensitive layers. 
     
     
         4 . The method according to  claim 3 , wherein the insulation photosensitive layer has the light sensitivity substantially equal to or higher than that of the first conductive photosensitive layer and has the light sensitivity lower than that of the second conductive photosensitive layer. 
     
     
         5 . The method according to  claim 4 , wherein the first conductive photosensitive layer, the second conductive photosensitive layer, and the insulation photosensitive layer have the amount of exposure and development condition different from each other in the exposure/development processes. 
     
     
         6 . The method according to  claim 5 , wherein each of the first and second conductive photosensitive layers comprises a photosensitive film and a nano wire conductive film. 
     
     
         7 . The method according to  claim 6 , wherein the nano wire conductive film comprises silver nano wires. 
     
     
         8 . The method according to  claim 7 , wherein the multi-layered film comprises a stack of a first silver nano wire conductive film, a first photosensitive film, the insulation photosensitive layer, a second silver nano wire conductive film, and a second photosensitive film which are sequentially stacked. 
     
     
         9 . The method according to  claim 1 , further comprising exposing the first conductive photosensitive layer. 
     
     
         10 . The method according to  claim 1 , further comprising connecting the first conductive photosensitive layer to a ground unit. 
     
     
         11 . The method according to  claim 7 , wherein the multi-layered film comprises a stack of a first silver nano wire conductive film, a first photosensitive film, a second photosensitive film, a second silver nano wire conductive film, and the insulation photosensitive layer which are sequentially stacked.