TWI486671B - Active array substrate and fabricating method thereof - Google Patents

Description

Active array substrate and method of manufacturing same

The present invention relates to an active array substrate and a method of fabricating the same, and more particularly to an active array substrate that prevents moisture from being conducted to an active region and a method of fabricating the same.

The liquid crystal (LC) display panel is generally formed by the active array substrate and the opposite substrate. In order to enable the liquid crystal in the liquid crystal display panel to rotate smoothly, the liquid crystal generally presents a predetermined angle with the active array substrate. Therefore, an alignment layer is disposed on the active array substrate to cause the liquid crystal and the active array substrate to exhibit the preset angle. Moreover, the alignment film usually covers the entire active array substrate, so that after the liquid crystal display panel is assembled, the moisture outside the liquid crystal display panel may be conducted to the inside of the liquid crystal display panel via the alignment film. When the water vapor is conducted to the active region of the liquid crystal display panel, the optical properties of the liquid crystal on the active region may be affected by moisture, so as to affect the display effect of the liquid crystal display panel.

The present invention provides an active array substrate that prevents moisture from passing through the alignment film to the active region.

The invention provides an active array substrate comprising a substrate, a conductive layer and an alignment film. The substrate has an active area, an unaligned area and a sealant area, wherein the unaligned area surrounds the active area, and the sealant area surrounds Active area and unaligned area. The conductive layer is disposed on the substrate, and a trench is formed, wherein a portion of the trench corresponding to the unaligned region is filled with a first alien material, and the first hydrophobic material is processed by a surface. The alignment film is disposed on a portion of the conductive layer that is not corresponding to the non-alignment region, and the alignment film is formed by an alignment film solution, wherein the alignment film solution and the surface treated first hydrophobic material mutually repel each other.

In an embodiment of the invention, the substrate further includes a low alignment region surrounding the active region and the non-alignment region, and overlapping with the sealant region, and the portion of the trench corresponding to the low alignment region is filled with a second alien material. The contact angle of the alignment film solution to the surface treated second hydrophobic material is smaller than the contact angle of the alignment film solution to the surface treated first hydrophobic material.

The invention also proposes a method for manufacturing an active array substrate, comprising the following steps. A conductive layer is disposed on a substrate, wherein the substrate has an active region, an unaligned region and a sealant region, the unaligned region surrounds the active region, and the sealant region surrounds the active region and the unaligned region. A trench is formed in the conductive layer. A portion of the groove corresponding to the unaligned region is filled with a first alien material. A surface treatment is performed on the first sparse material. An alignment film solution is disposed on the conductive layer to form an alignment film on the portion of the conductive layer that is not corresponding to the non-alignment region, wherein the alignment film solution and the surface treated first hydrophobic material mutually repel each other.

In one embodiment of the invention, the contact angle of the surface treated first hydrophobic material to the alignment film solution is greater than 120 degrees.

In one embodiment of the invention, the first hydrophobic material is a material comprising an alcohol functional group.

In one embodiment of the present invention, the surface treatment is such that the first hydrophobic material chemically reacts with a chemical substance to form a plurality of long carbon chains on the surface of the first hydrophobic material to reduce the adhesion of the alignment film solution to the first hydrophobic material.

In one embodiment of the invention, the chemical is one of decane, an acid chemical, and an alcohol chemical.

In an embodiment of the present invention, the method for manufacturing the active array substrate further includes: filling a portion of a low alignment region of the corresponding substrate of the trench with a second detached material, wherein the low alignment region surrounds the active region and the unaligned region. And overlapping with the sealant region; the first sparse material is subjected to a surface treatment, wherein the contact angle of the alignment film solution to the surface treated second sparse material is smaller than the contact lens solution at the surface treated first sparse material contact angle.

In one embodiment of the invention, the alignment film solution is disposed on the conductive layer by spin coating.

Based on the above, the active array substrate and the method for fabricating the same according to the embodiments of the present invention, wherein the portion of the conductive layer corresponding to the unaligned region fills the surface-treated first hydrophobic material so that the alignment film cannot be formed on the substrate. Alignment area. Thereby, the unaligned region surrounding the active region of the substrate prevents moisture from being transmitted to the active region through the alignment film to prevent the moisture from affecting the optical characteristics of the active region.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a structural diagram of an active array substrate according to an embodiment of the invention. intention. Referring to FIG. 1 , in the embodiment, the active array substrate 100 includes a substrate 110 , a conductive layer 120 , and an alignment film 130 . The substrate has an active area 111, an unaligned area 113 and a sealant area 115, wherein the unaligned area 113 surrounds the active area 111, and the sealant area 115 surrounds the active area 111 and the unaligned area 113. Moreover, the active area 111 may be an area forming a pixel structure (not shown), and the glue area 115 is here an area where the sealant 10 is disposed.

The conductive layer 120 is disposed on the substrate 110, and the trench 121 is formed corresponding to the unaligned region 113, that is, the trench 121 is entirely corresponding to the unaligned region 113, wherein the trench 121 is filled with the first stripping material 123. Further, after the surface treatment, the first delamination material 123 repels the alignment film solution forming the alignment film 130, that is, the alignment film solution of the alignment film 130 is less likely to adhere to the surface of the surface-treated first detachment material 123. Further, the contact angle of the surface of the surface-treated first hydrophobic material 123 with the alignment film solution of the alignment film 130 is greater than 120 degrees.

In the present embodiment, the alignment film solution of the alignment film 130 is disposed on the conductive layer 120 by a spin coating method. Since the alignment film solution of the alignment film 130 is less likely to adhere to the surface of the surface-treated first detached material 123, the alignment film solution of the alignment film 130 does not stay at the first detachment material 123 during spin coating. The surface (ie, the non-alignment region 113) is such that the alignment film 130 is not formed on the portion of the conductive layer 120 corresponding to the unaligned region 113, that is, the alignment film 130 is disposed on the portion of the conductive layer 120 that is not corresponding to the unaligned region 113. .

In general, the alignment film 130 still transmits moisture after curing, and The non-alignment region 113 of the embodiment of the invention does not form the alignment film 130, so that the conduction of moisture can be blocked. Moreover, since the unaligned region 113 surrounds the active region 111, moisture can be prevented from being conducted to the active region 111 to prevent the moisture from affecting the optical characteristics of the active region 111.

In the embodiment of the present invention, the surface treatment may be that the first hydrophobic material 123 chemically reacts with the chemical substance to form a plurality of long carbon chains on the surface of the first hydrophobic material 123 to reduce the alignment film solution of the alignment film 130. A surface and adhesion of the material 123 is separated. Moreover, the first hydrophobic material 123 may be a material containing an alcohol functional group (-OH), such as cerium oxide (SiO ₂ ) or aluminum oxide (Al ₂ O ₃ ), and the chemical used in the surface treatment may be decane, One of acid chemicals and alcohol chemicals.

2A-2D are flow diagrams showing the fabrication of an active array substrate in accordance with an embodiment of the present invention. Referring to FIG. 2A to FIG. 2D, the active array substrate 100 can be manufactured by using the embodiment shown in FIG. 2A to FIG. 2D, but the embodiment of the present invention is not limited thereto. Referring to FIG. 2A , in the embodiment, the conductive layer 220 is disposed on the substrate 210 , wherein the substrate 210 has an active region 211 , an unaligned region 213 , and a sealant region 215 , and the unaligned region 213 surrounds the active region 211 . The sealant region 215 surrounds the active region 211 and the unaligned region 213. Moreover, the conductive layer 220 forms the trench 221 corresponding to the unaligned region 213.

Referring to FIGS. 2B to 2D, in the present embodiment, the first detachment material 223 is filled in the trench 221, and the first detached material 223 is surface-treated to form a plurality of long carbon chains KC. In other words, if the first detached material 223 is a material containing an alcohol functional group (-OH), then the first detached material 223 The chemical substance that undergoes a chemical reaction to form a long carbon chain KC may be one of silane, an acid chemical, and an alcohol chemical.

Then, since a plurality of long carbon chains KC are formed on the surface of the first sparse material 223, the alignment film solution of the alignment film 230 is hard to adhere to the surface of the first sparse material 223, whereby the alignment film solution of the alignment film 230 can be lowered first. The adhesion of the delamination material 223 is equivalent to the alignment film solution of the alignment film 230 and the surface-treated first detachment material 223 mutually repelling each other. Therefore, during the process of disposing the alignment film solution of the alignment film 230 on the conductive layer 220 by spin coating, the alignment film solution of the alignment film 230 does not stay on the surface of the first delamination material 223, so the alignment film 230 is formed on The portion of the conductive layer 220 that does not correspond to the unaligned region 213.

3 is a schematic structural view of an active array substrate according to another embodiment of the present invention. 1 and 3, the same or similar reference numerals are used for the same or similar structures. In the present embodiment, the active array substrate 300 is substantially the same as the active array substrate 100 except that the trenches 121a of the conductive layer 120 simultaneously correspond to the unaligned regions 113 and the low alignment regions 310 of the substrate 110. The low alignment region 310 surrounds the active region 111 and the unaligned region 113 and overlaps the sealant region 115. And a portion of the trench 121a corresponding to the low alignment region 310 is filled with the second sparse material 320.

In this embodiment, the second alienation material 320 may be the same or different from the first alienation material 123, which may vary according to those of ordinary skill in the art. Moreover, after the surface treatment, the adhesion of the alignment film solution to the surface of the second detachment material 320 is higher than that of the first detachment material 123, that is, the alignment film solution of the alignment film 120 is applied to the surface treated second detachment material 320. Connection The antenna angle is smaller than the contact angle of the alignment film solution of the alignment film 120 to the surface-treated first hydrophobic material 123. Thereby, the sealant 10 can be attached to the surface of the second hydrophobic material 320 to further reduce the possibility of moisture transfer to the active region 111.

In an embodiment of the present invention, the second detachment material 320 may be the same as the first detachment material 123. At this time, the surface of the second detachment material 320 may have different chemical materials, chemical materials, or surface treatment time. The first alienation material 123.

In summary, the active array substrate and the method for fabricating the same according to the embodiments of the present invention fill the trenches of the conductive layer with the surface-treated first hydrophobic material so that the alignment film cannot be formed in the unaligned region of the substrate. Thereby, the unaligned region surrounding the active region of the substrate prevents moisture from being transmitted to the active region through the alignment film to prevent the moisture from affecting the optical characteristics of the active region. Moreover, the surface treated second sparse material may be filled in the trench to allow the sealant to adhere to the surface treated second hydrophobic material, thereby further reducing the possibility of moisture transfer to the active region 111.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Box glue

100,300‧‧‧Active array substrate

110, 210‧‧‧ substrate

111, 211‧‧‧ active area

113, 213‧‧‧ unaligned areas

115, 215‧‧ ‧ glue area

120, 220‧‧‧ conductive layer

121, 121a, 221‧‧‧ trench

123, 223‧‧‧ first alien material

130, 230‧‧ ‧ alignment film

310‧‧‧Low alignment area

320‧‧‧Second alien material

KC‧‧ long carbon chain

1 is a schematic structural view of an active array substrate according to an embodiment of the invention.

2A to 2D are flowcharts showing the manufacture of an active array substrate according to an embodiment of the invention.

3 is a schematic structural view of an active array substrate according to another embodiment of the present invention.

10‧‧‧Box glue

100‧‧‧Active array substrate

110‧‧‧Substrate

111‧‧‧Active area

113‧‧‧No alignment area

115‧‧‧Glue area

120‧‧‧ Conductive layer

121‧‧‧ trench

123‧‧‧First alien material

130‧‧‧Alignment film

Claims (14)

An active array substrate includes: a substrate having an active area, an unaligned area, and a sealant area, wherein the unaligned area surrounds the active area, the sealant area surrounding the active area and the unaligned area; a conductive layer disposed on the substrate and forming a trench, wherein the trench is filled with a first detached material corresponding to a portion of the unaligned region, and the first detached material is subjected to a surface treatment; and an alignment film, And disposed on the portion of the conductive layer that is not corresponding to the alignment region, the alignment film is formed by an alignment film solution, wherein the alignment film solution and the surface treated first spacer material mutually repel each other. The active array substrate according to claim 1, wherein a contact angle of the first detached material and the alignment film solution after the surface treatment is greater than 120 degrees. The active array substrate according to claim 1, wherein the first hydrophobic material is a material containing an alcohol functional group. The active array substrate according to claim 1, wherein the surface treatment is to chemically react the first hydrophobic material with a chemical to form a plurality of long carbon chains on the surface of the first hydrophobic material to reduce the alignment film. The adhesion of the solution to the first hydrophobic material. The active array substrate according to claim 4, wherein the chemical substance is one of a decane, an acid chemical, and an alcohol chemical. The active array substrate according to claim 1, wherein The substrate further includes a low alignment region surrounding the active region and the unaligned region, and overlapping with the sealant region, the portion of the trench corresponding to the low alignment region is filled with a second alien material, and the alignment film solution is The contact angle of the surface treated second spacer material is smaller than the contact angle of the alignment film solution to the first spacer material treated by the surface treatment. The active array substrate according to claim 1, wherein the alignment film solution is disposed on the conductive layer by a spin coating method. A method for manufacturing an active array substrate includes: arranging a conductive layer on a substrate, wherein the substrate has an active region, an unaligned region, and a sealant region, the unaligned region surrounding the active region, the sealant region Surrounding the active region and the unaligned region; forming a trench in the conductive layer; filling a portion of the trench opposite the unaligned region with a first detached material; performing a surface treatment on the first detached material; An alignment film solution is disposed on the conductive layer to form an alignment film on a portion of the conductive layer that is not corresponding to the unaligned region, wherein the alignment film solution and the surface treated first spacer material mutually repel each other. The method for manufacturing an active array substrate according to claim 8, wherein a contact angle of the first detached material and the alignment film solution after the surface treatment is greater than 120 degrees. The method for manufacturing an active array substrate according to claim 8, wherein the first hydrophobic material is a material containing an alcohol functional group. The system of the active array substrate as described in claim 8 The method of the present invention, wherein the first hydrophobic material is chemically reacted with a chemical substance to form a plurality of long carbon chains on the surface of the first hydrophobic material to reduce the adhesion of the alignment film solution to the first hydrophobic material. The method of manufacturing an active array substrate according to claim 11, wherein the chemical substance is one of a decane, an acid chemical, and an alcohol chemical. The method for manufacturing an active array substrate according to claim 8 , further comprising: filling a portion of the trench corresponding to a low alignment region of the substrate with a second smear material, wherein the low alignment region surrounds the active a region and the unaligned region overlapping with the sealant region; and a surface treatment of the second sparse material, wherein the alignment film solution has a contact angle of the second hydrophobic material through the surface treatment is smaller than the alignment film The first contact material contact angle of the solution treated by the surface. The method of manufacturing an active array substrate according to claim 8, wherein the alignment film solution is disposed on the conductive layer by a spin coating method.