US 9,543,335 B2Granted

Liquid-crystal display and element substrate thereof

AssigneeInnolux Corporation

InventorsYueh-Ting Chung, Jyun-Yu Chen, Wei-Chen Hsu, Yung-Hsin Lu, Chao-Hsiang Wang, Kuan-Yu Chiu

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Abstract

An element substrate is provided, including a substrate, a metal layer and a planarization layer. The metal layer is located on the substrate. The metal layer has a first edge in a first direction. The planarization layer is located on the metal layer. The planarization layer includes a contact hole. The contact hole has a contiguous wall and a bottom side. The metal layer is exposed in the bottom side. A contour line of the contiguous wall on a vertical plane is a curved line. The first edge corresponds vertically with a critical point on the contour line. The slope of a tangent line on the critical point of the contour line is between 0.087 to 0.364.

Claims20

Dependent claims

An element substrate, comprising:

a substrate;
a metal layer, disposed on the substrate and having a first width along a first direction;
and
a planarization layer, disposed on the metal layer and having a first thickness along a second direction perpendicular to the first direction,
wherein the planarization layer comprises a top and a bottom, and the first thickness is a distance between the top and the bottom along the second direction in a pixel region,
wherein the planarization layer comprises a contact hole, the contact hole has a contiguous wall and a hole bottom, the hole bottom exposes the metal layer, and the hole bottom has a second width along the first direction,
wherein the first width and the second width satisfy the following equation:
2
*
{
L
2
2
+
(
1
-
p
)
⁢
h
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
·
ln
⁡
[
-
tan
⁢
⁢
δ
*
(
1
-
p
)
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
]
}
-
3.8
≤
L
1
≤
2
*
{
L
2
2
+
(
1
-
p
)
⁢
h
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
·
ln
⁡
[
-
tan
⁢
⁢
δ
*
(
1
-
p
)
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
]
}
+
3.8
wherein L1 is the first width, L2 is the second width, h is the first thickness, δ is an angle between 5 degrees to 20 degrees, θ is an included angle between a straight line and an extension surface of the hole bottom, the straight line connects a reference point and a base point, the reference point and the base point are located on the contiguous wall, wherein a distance from the reference point to the bottom of the planarization layer along the second direction is 0.95h, the base point is located at the point where the contiguous wall is connected to the hole bottom, p is an adjustable parameter, and 0<p≦0.1.

127 more elements

A liquid-crystal display, comprising:

an first substrate;
an second substrate adjacent to the first substrate;
a liquid-crystal layer disposed between the first substrate and the second substrate, wherein the first substrate comprises:
a metal layer, disposed on the substrate and having a first width along a first direction;
and
a planarization layer, disposed on the metal layer and having a first thickness along a second direction perpendicular to the first direction,
wherein the planarization layer comprises a top and a bottom, and the first thickness is a distance between the top and the bottom along the second direction in a pixel region,
wherein the planarization layer comprises a contact hole, the contact hole has a contiguous wall and a hole bottom, the hole bottom exposes the metal layer, and the hole bottom has a second width along the first direction,
wherein the first width and the second width satisfy the following equation:
2
*
{
L
2
2
+
(
1
-
p
)
⁢
h
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
·
ln
⁡
[
-
tan
⁢
⁢
δ
*
(
1
-
p
)
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
]
}
-
3.8
≤
L
1
≤
2
*
{
L
2
2
+
(
1
-
p
)
⁢
h
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
·
ln
⁡
[
-
tan
⁢
⁢
δ
*
(
1
-
p
)
ln
⁡
(
p
)
·
tan
⁡
(
1.5
⁢
θ
)
]
}
+
3.8
wherein L1 is the first width, L2 is the second width, h is the first thickness, δ is an angle between 5 degrees to 20 degrees, θ is an included angle between a straight line and an extension surface of the hole bottom, the straight line connects a reference point and a base point, the reference point and the base point are located on the contiguous wall, wherein a distance from the reference point to the bottom of the planarization layer along the second direction is 0.95h, the base point is located at the point where the contiguous wall is connected to the hole bottom, p is an adjustable parameter, and 0<p≦0.1.

129 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/003,596Filed 21 Jan 2016 · continuation in part
Priority: TW 103124494 A17 Jul 2014
Published: US 2016/0018687 A119 May 2016
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H10D 86/60
Characterised by multiple TFTs: wherein the TFTs are in active matrices
G02F 1/136227
Active matrix addressed cells: through-hole connection of the pixel electrode to the active element through an insulation layer
H10D 86/421
Characterised by multiple TFTs: having a particular composition, shape or crystalline structure of the active layer
H10D 86/423
Having a particular composition, shape or crystalline structure of the active layer: comprising semiconductor materials not belonging to the Group…

Family

Application14/493,173Parent of this continuation-in-part · filed 22 Sep 2014
US 2016/0139452 A1Pre-grant publication · published 19 May 2016
US 9,360,725 B2Parent of this continuation-in-part
US 2016/0018687 A1Published application
US 9,543,335 B2This patent

From the US filing history. Foreign family members aren’t listed.