Two-Layer Signal Line Structure for Display Panels
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Solution Overview
Problem
Display panels face challenges in achieving improved signal transmission speed and reducing defects in manufacturing.
Innovation Solution
A display panel with a two-layer signal line structure, where the first layer is an aluminum-nickel-lanthanum alloy and the second layer is niobium, reducing wire resistance and hillock phenomena, and incorporating a method that includes forming a semiconductor pattern, control electrodes, and a light emitting element on a base layer with specific deposition conditions and annealing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single-layer aluminum signal line is used, then the manufacturing process is simple, but the signal transmission speed is limited due to higher resistance
Solution Approach 1:
The patent applies composite materials by creating a two-layer signal line structure where the first layer is aluminum and the second layer is a low-resistance material (such as molybdenum, tungsten, or copper). This composite structure reduces overall wire resistance and improves signal transmission speed while maintaining manufacturing feasibility through sequential deposition processes.
2Reliability
If aluminum is used as the signal line material, then the conductivity is good, but hillock phenomena occur causing manufacturing defects
Solution Approach 1:
The patent uses composite materials to address hillock phenomena by combining aluminum with a low-resistance material in a two-layer structure. The aluminum layer provides good conductivity while the second layer compensates for the hillock formation, reducing manufacturing defects and improving overall reliability.
Solution Approach 2:
The patent applies parameter changes by modifying the physical and chemical properties of the signal line through the two-layer structure. The addition of the low-resistance material layer changes the electrical parameters (reducing resistance) and mechanical parameters (suppressing hillock formation) of the signal line, thereby improving manufacturing reliability.
3Speed
If the signal line resistance is reduced to improve signal transmission, then the signal transmission speed increases, but the manufacturing precision requirements increase
Solution Approach 1:
The patent uses composite materials to achieve low resistance while managing manufacturing precision challenges. The two-layer structure allows each material to be optimized independently - aluminum for conductivity and the second layer for low resistance - with standard deposition thicknesses (500-2000 Å for aluminum, 100-500 Å for the second layer), making the process controllable and precise.
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
The solution enhances signal transmission speed by reducing resistance and minimizing defects, such as hillock phenomena, thereby improving display panel performance and manufacturing efficiency.
Implementation Method 1
The signal line includes a first layer including aluminum and a second layer disposed directly on the first layer and consisting of niobium
Implementation Method 2
forming a first layer including aluminum; forming, directly on the first layer, a second layer consisting of niobium
Implementation Method 3
incorporating a method that includes forming a semiconductor pattern, control electrodes, and a light emitting element on a base layer with specific deposition conditions and annealing processes
Data Source
AI summary
A display panel includes a base layer, a signal line which is disposed on the base layer and includes a first layer including aluminum and a second layer disposed directly on the first layer and consisting of niobium, a first thin film transistor connected to the signal line, a second thin film transistor disposed on the base layer, a capacitor electrically connected to the second thin film transistor, and a light emitting element electrically connected to the second thin film transistor.