Electrostatic Releasing Element for Display Substrate ESD Protection
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Solution Overview
Problem
Electrostatic discharge (ESD) during the fabrication of thin film transistor liquid crystal display (TFT-LCD) devices causes defects and short circuits due to the accumulation of electrostatic charges, particularly in the wiring area, where the glass substrate contacts machinery, leading to yield reduction and quality issues.
Innovation Solution
Incorporating an electrostatic releasing element, electrically insulated from the circuitry elements, adjacent to them, to redirect and discharge electrostatic charges, thereby preventing direct ESD between the circuitry elements and protecting the substrate from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the glass substrate contacts the machine during fabrication, then the layers can be formed on the substrate, but electrostatic charges accumulate on the substrate surface causing discharge that breaks the layers and creates defects
Solution Approach 1:
The patent introduces an electrostatic releasing element as an intermediary component between the circuitry elements and the environment. This element provides a controlled discharge path for accumulated electrostatic charges, preventing direct discharge between circuitry elements while allowing safe release of static electricity during manufacturing processes
Solution Approach 2:
The electrostatic releasing element is designed to preemptively handle charge accumulation before it reaches dangerous levels. By providing a pre-established discharge path, the system prevents electrostatic discharge damage before it occurs, rather than responding after damage has been done
2Reliability
If the distance between circuitry elements is increased to prevent electrostatic discharge, then discharge between elements is reduced, but the wiring area becomes more complex and manufacturing difficulty increases
Solution Approach 1:
The electrostatic releasing element serves as a mediator that allows circuitry elements to remain in close proximity while still providing protection against electrostatic discharge. This intermediary component enables dense wiring layouts without sacrificing reliability, as the releasing element handles charge dissipation rather than requiring increased spacing
3Object-affected harmful factors
If contact points with the machine are adjusted to avoid the wiring area, then electrostatic charge formation is reduced, but the manufacturing process becomes less efficient and productivity decreases
Solution Approach 1:
The electrostatic releasing element enables the substrate to self-manage electrostatic charge accumulation during the manufacturing process. This self-service capability allows the substrate to safely dissipate charges independently, eliminating the need for complex machine contact point adjustments and maintaining high manufacturing efficiency
Solution Approach 2:
The releasing element acts as an intermediary that decouples the manufacturing process from electrostatic discharge risks. Machine contact points can remain in standard positions for efficient manufacturing, while the electrostatic releasing element provides continuous protection against charge accumulation
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 electrostatic releasing element effectively redirects electrostatic discharge, reducing defects and improving the quality of the display substrate by preventing short circuits and ensuring the integrity of signal lines, thus enhancing the manufacturing yield and product quality.
Implementation Method 1
electrostatic charges may accumulate on surface of the glass substrate. An electrostatic discharge happens when the electrostatic charges have accumulated to a certain level
Data Source
AI summary
The present disclosure provides a display substrate, a display panel and a display apparatus. An exemplary display substrate includes a first circuitry element and a second circuitry element in proximity to the first circuitry element, and an electrostatic releasing element, electrically insulated from each of the first and second circuitry elements, and located adjacent to each of the first and second circuitry elements, whereby allowing discharge of electrostatic charges to the electrostatic releasing element from at least one of the first and second circuitry elements, so as to prevent direct electrostatic discharge between the first circuitry element and the second circuitry element.