Patent ID: 9543335
Date: 2017-01-10
CPC Classifications: G02F,H01L

Claim:
1. 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: 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.