Multilayer Display Device Conductors for Low-Resistance Wiring
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Solution Overview
Problem
Display devices with high resistance in wires and electrodes lead to deteriorated display performance, and the use of multiple masks in manufacturing decreases manufacturing yield.
Innovation Solution
A display device design featuring a base substrate with multiple conductive layers, including a first conductive layer with wires, a second conductive layer with patterns, and a third conductive layer electrically contacting the second pattern, utilizing materials like titanium and aluminum for low resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resistance of wires and electrodes is reduced by material selection and layer structure, then display performance is improved, but manufacturing process complexity increases
Solution Approach 1:
The conductive structure is divided into multiple segments: first conductive layer with wires, second conductive layer with first and second patterns, and third conductive layer. This segmentation allows each layer to serve specific functions (power supply, signal transmission, electrode formation) while collectively achieving low resistance and improved display performance.
Solution Approach 2:
The patent transitions from planar conductive structures to three-dimensional multi-layer structures. The second pattern extends in the second direction to form electrodes, while the third conductive layer adds vertical dimension for additional signal lines and connections, reducing resistance through spatial optimization.
2Manufacturing precision
If multiple masks are used in manufacturing for precise pattern formation, then manufacturing precision is improved, but manufacturing yield decreases
Solution Approach 1:
Each conductive layer serves multiple functions: the first conductive layer provides both power supply lines and signal transmission; the second conductive layer forms both patterns for wire coverage and spaced electrodes; the third conductive layer adds signal lines while maintaining compatibility with existing structures. This multi-functionality reduces the need for separate manufacturing steps.
Solution Approach 2:
The patent combines multiple conductive functions into integrated layers. The second conductive layer simultaneously provides wire coverage patterns and spaced electrode patterns. The multi-layer structure merges power supply, signal transmission, and electrode formation into a unified manufacturing approach, reducing mask requirements and improving yield.
Data Source
AI summary
A display device includes a base substrate, an active layer disposed on the base substrate, a first conductive layer disposed on the active layer, where the first conductive layer includes a plurality of wires, a second conductive layer disposed on the active layer, where second conductive layer includes a first pattern covering each of the plurality of wires and a second pattern spaced apart from the first pattern, and a third conductive layer disposed on the second conductive layer. At least a portion of the third conductive layer electrically contacts the second pattern.