Display Substrate Pad Corrosion Protection via Encapsulation
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Solution Overview
Problem
Conventional display substrates face reliability issues due to corrosion of metal pad parts, leading to increased contact resistance and dark pixels, which degrade the overall performance of the display.
Innovation Solution
Incorporating a corrosion member, such as noble metals or conductive materials with corrosion resistance, into the gate and data pad parts, and using thin film deposition processes to form these corrosion members, thereby reducing corrosion and enhancing the reliability of the display substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pad part is exposed to outside to receive signals, then the signal reception function is achieved, but the pad part is easily corroded by oxygen and moisture leading to increased contact resistance
Solution Approach 1:
The patent introduces an encapsulation layer as an intermediary substance between the pad part and the external environment (oxygen and moisture). This encapsulation layer prevents direct contact between the harmful external factors and the pad part, thereby resolving the contradiction between maintaining signal reception functionality and preventing corrosion damage.
Solution Approach 2:
The patent creates an inert protective environment around the pad part through the encapsulation layer, which isolates the pad part from the reactive external atmosphere containing oxygen and moisture. This inert environment prevents oxidation and corrosion reactions, solving the contradiction between external exposure requirements and corrosion prevention.
2Reliability
If corrosion-resistant materials are used in pad parts, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies corrosion protection only to specific locations where it is most needed - the pad parts that are exposed to external signals and susceptible to corrosion. Rather than using expensive corrosion-resistant materials throughout the entire display substrate, the encapsulation layer is selectively applied to protect only the critical pad areas, thereby reducing overall manufacturing costs while maintaining reliability where it matters most.
Solution Approach 2:
The patent uses a cost-effective encapsulation layer material that provides sufficient corrosion protection for the required service life of the display device. Instead of using expensive long-lasting corrosion-resistant materials, the solution employs more economical materials that achieve adequate protection, balancing reliability improvement with manufacturing cost considerations.
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 use of corrosion members in the pad parts effectively prevents damage from water and gas, improving the reliability of the display substrate and reducing manufacturing costs by targeted application of corrosion-resistant materials.
Implementation Method 1
the pad part includes a corrosion member to reduce or effectively prevent damage to the pad part by water or gas which permeates into the pad part
Implementation Method 2
using thin film deposition processes to form these corrosion members
Data Source
AI summary
A display substrate includes a base substrate, a gate-line on the base substrate, a data-line crossing the gate-line, a pixel area defined on the base substrate, a gate-pad part connected to an end portion of the gate-line and including a gate corrosion member, and a data-pad part connected to an end portion of the data-line and including a data corrosion member.