Inorganic Insulating Layer Prevents Short-Circuits in Display Devices
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Solution Overview
Problem
Flat panel display devices, such as OLED and LCDs, face issues with surface roughness of organic insulating layers due to etching processes, leading to conductive material deposition and subsequent short-circuits between conductive wires.
Innovation Solution
Incorporating an inorganic insulating layer with a silicon nitride film containing hydrogen between the organic insulating layer and the gate electrode, and forming open grooves in both layers to align and expose the gate insulating layer, preventing conductive material accumulation and ensuring electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the organic insulating layer is exposed to etching processes to form contact holes or pattern conductive layers, then the conductive wires can be formed, but the surface roughness of the organic insulating layer remarkably increases
Solution Approach 1:
An inorganic insulating layer is formed on the organic insulating layer before the etching process. This preliminary protective layer prevents the etching process from directly damaging the organic insulating layer, thereby maintaining surface smoothness while still allowing conductive wire formation to proceed
Solution Approach 2:
The inorganic insulating layer acts as an intermediary between the etching process and the organic insulating layer. It serves as a buffer that absorbs the harmful effects of etching, protecting the underlying organic layer from surface roughening while permitting the necessary manufacturing steps to occur
2Ease of manufacture
If a conductive layer is formed on the organic insulating layer with increased surface roughness, then the conductive wires can be created, but the conductive material is easily left on the surface causing short-circuits
Solution Approach 1:
The inorganic insulating layer is deposited before the conductive layer formation process. This creates a smooth, protected surface on which the conductive material can be deposited uniformly, preventing material accumulation that would cause short-circuits while still enabling conductive wire creation
Solution Approach 2:
The inorganic insulating layer serves as an intermediary surface between the conductive layer and the organic insulating layer. It provides a smooth interface for conductive material deposition, preventing the material from adhering to the rough organic layer surface and causing electrical shorts
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents internal short-circuits and allows for effective annealing of semiconductor layers, improving the manufacturing process and performance of display devices.
Implementation Method 1
allows for effective annealing of semiconductor layers
Data Source
AI summary
A display device and a manufacturing method thereof are provided. The display device includes a substrate, a semiconductor layer formed on the substrate, an organic insulating layer formed on the semiconductor layer, a plurality of conductive wires formed on the organic insulating layer. The organic insulating layer has an open groove that is formed between the conductive wires.