Segmented Shorting Bars for Display Substrate Testing
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Solution Overview
Problem
In the manufacturing process of display substrates, the use of large-area shorting bars for testing generates a significant amount of metal dust during cutting, leading to circuit defects and increased product defect rates.
Innovation Solution
The display substrate incorporates a test area with signal lines divided into groups, each coupled through multiple shorting bars with smaller widths, allowing for reduced cutting area and minimized metal dust generation during the decoupling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large-area shorting bars are used for testing, then the testing function is achieved, but metal dust generation increases and circuit defects occur
Solution Approach 1:
The patent divides the large-area shorting bar into multiple smaller shorting bars (first shorting bars and second shorting bars) that are arranged in parallel. Each shorting bar has a width of 17-25 microns, which significantly reduces the cutting area compared to a single large shorting bar. This segmentation maintains the testing function while minimizing metal dust generation during the cutting process.
2Reliability
If large-area shorting bars are used for testing, then the testing function is achieved, but cutting area increases and energy consumption rises
Solution Approach 1:
By segmenting the large shorting bar into multiple smaller parallel bars with widths of 17-25 microns, the total cutting area is reduced. This directly lowers the energy consumption during the cutting process while preserving the electrical connectivity and testing functionality of the signal lines.
3Object-generated harmful factors
If multiple shorting bars are used to couple signal lines, then metal dust generation is reduced, but the structure becomes more complex
Solution Approach 1:
The patent combines multiple first shorting bars and second shorting bars in parallel arrangements to couple the signal lines. While this creates multiple connection paths, the parallel structure maintains symmetry and regularity in the layout, which actually simplifies the manufacturing process and reduces overall structural complexity compared to an asymmetric single-bar design.
Data Source
AI summary
The present disclosure provides a display substrate and a display device. The display substrate includes a test area, the test area includes a plurality of signal lines coupled to signal lines in a display area of the display substrate, the signal lines are divided into a plurality of groups, each group of signal lines in at least a portion of the groups are coupled through a plurality of shorting bars, and each of the shorting bars is coupled to a same group of signal lines.