Display device and manufacturing method thereof

Abstract

Provided is a display device, including: an insulation substrate; a thin film transistor positioned on the insulation substrate; a pixel electrode connected with the thin film transistor; a first alignment layer positioned on the pixel electrode; a second alignment layer spaced apart from the first alignment layer by a microcavity; a common electrode positioned on the second alignment layer; a roof layer on the common electrode; a liquid crystal injection hole in the common electrode and the roof layer to extend to a part of the microcavity; a liquid crystal layer filling the microcavity; and an overcoat on the roof layer to cover the liquid crystal injection hole to seal the microcavity. Each of the first alignment layer and the second alignment layer includes a plurality of heterogeneous

What is claimed is: 
     
         1 . A display device, comprising:
 a substrate;   a thin film transistor on the substrate;   a pixel electrode connected with the thin film transistor;   a roof layer overlapping the pixel electrode,   a liquid crystal layer disposed in a plurality of microcavities between the pixel electrode and the roof layer;   an alignment layer disposed at least between one of the pixel electrode and the liquid crystal layer, and the liquid crystal layer and the roof layer;   wherein the alignment layer includes a plurality of heterogeneous layers.   
     
     
         2 . A display device of  claim 1 , wherein:
 the alignment layer comprises an organic layer and inorganic layer.   
     
     
         3 . A display device of  claim 1 , wherein:
 the alignment layer comprises   a first alignment layer on the pixel electrode; and   a second alignment layer between the liquid crystal layer and the roof layer.   
     
     
         4 . The display device of  claim 3 , wherein:
 the first alignment layer includes a first organic layer and a first inorganic layer, and   the second alignment layer includes a second organic layer and a second inorganic layer.   
     
     
         5 . The display device of  claim 4 , wherein:
 the first organic alignment layer on the pixel electrode, and   the first inorganic alignment layer on the first organic alignment layer, and   the second organic alignment layer disposed between the liquid crystal layer and the roof layer, and   the second inorganic alignment layer disposed between the second organic alignment layer and the liquid crystal layer.   
     
     
         6 . The display device of  claim 3 , wherein:
 the first alignment layer and the second alignment layer are formed by coating and drying heterogeneous aligning agents many times,   each of the aligning agents includes an aligning agent solvent and an aligning agent solid, and   an n-th aligning agent solvent does not dissolve an n−1-th aligning agent solid:   n is a natural number of 2 or more.   
     
     
         7 . The display device of  claim 1 , wherein:
 a thickness of the alignment layer is about 100 Å or more.   
     
     
         8 . The display device of  claim 1 , further comprising:
 a first insulating layer on the thin film transistor;   a common electrode on the second alignment layer,   a second insulating layer on the common electrode;   a third insulating layer on the roof layer, and   an overcoat on the third insulation layer.   
     
     
         9 . The display device of  claim 8 , wherein:
 at least one of the second insulating layer and the third insulating layer is made of any one of silicon nitride, silicon oxide, and silicon oxynitride.   
     
     
         10 . The display device of  claim 1 , further comprising:
 a color filter overlapping with the pixel electrode; and   a light blocking member overlapping with the thin film transistor.