Display Panel Conductive Traces with Breaks for Cutting Yield
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Solution Overview
Problem
As display panel resolutions increase, the pitch between conductive traces decreases, leading to electrical short circuits during the cutting process for removing testing pads, which affects the cutting yield and quality of the display panel.
Innovation Solution
Incorporating breaks in the conductive traces between bonding pads and testing pads, allowing the cutting line to be positioned between these breaks to avoid electrical short circuits, thereby improving the cutting yield by ensuring the conductive traces are separated during the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pitch between conductive traces is decreased to accommodate higher resolution display panels, then the display resolution is improved, but electrical short circuits occur during the cutting process
Solution Approach 1:
The conductive traces are divided into multiple segments by introducing breaks, so that each trace is no longer a continuous conductor. This segmentation prevents electrical short circuits between adjacent traces during the cutting process, while still maintaining the electrical connection function within each segment.
Solution Approach 2:
Breaks are pre-formed in the conductive traces before the cutting process. This preliminary action ensures that the traces are already separated at critical points, preventing short circuits that would otherwise occur during cutting when traces with reduced pitch are close together.
2Adaptability or versatility
If cutting parameters are adjusted for different product specifications, then the adaptability to different resolutions is improved, but the process complexity increases
Solution Approach 1:
The break structure in the conductive traces provides a universal solution that works across different product specifications and resolutions. Instead of adjusting cutting parameters for each product type, the same break design prevents short circuits in all cases, simplifying the cutting process.
3Measurement precision
If the pitch between conductive traces is decreased, then the display resolution is improved, but the risk of electrical short circuit during cutting increases
Solution Approach 1:
By segmenting the conductive traces with breaks, the electrical continuity is interrupted at specific points. This prevents current from flowing between adjacent traces during cutting, eliminating the short circuit hazard that arises from reduced pitch.
Solution Approach 2:
The breaks act as intermediary elements that physically and electrically separate adjacent conductive traces. This intermediary structure prevents direct electrical contact between traces during the cutting process, mitigating the short circuit risk.
Data Source
AI summary
A display panel including a substrate, a plurality of bonding pads, and a plurality of conductive traces is provided. The substrate has a substrate edge, a display region, and a peripheral region disposed between the substrate edge and the display region. The plurality of bonding pads are arranged in the peripheral region of the substrate. The plurality of conductive traces are electrically connected to the bonding pads. The conductive traces extend between the bonding pads and the substrate edge and have a plurality of breaks. A method of fabricating the display panel is also provided.