Array Substrate Shielding Electrode Layout for Laser Repair
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Solution Overview
Problem
In Transparent Storage capacity and Shielding Layer (TSS) pixel structures, the TSS transparent electrode layer can cause short circuits during laser repair of array substrates due to metal melt formation, affecting repair success rates and yield.
Innovation Solution
Incorporating a transparent shielding electrode with repair holes on the array substrate, which overlaps with data and scanning lines, allowing exposure of these lines to reduce the likelihood of metal melt contact and short circuits during laser repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the TSS transparent electrode layer is disposed to cover the data line to improve transmittance and storage capacitance, then the transmittance and storage capacitance are greatly improved, but metal melt will be formed on the laser section during laser repair process and may cause a short circuit between the TSS transparent electrode layer and the data line
Solution Approach 1:
The transparent shielding electrode is segmented by forming repair holes at specific positions, dividing it into multiple isolated regions. This segmentation allows the electrode to maintain its shielding function in non-repair areas while providing access to metal lines in repair areas, thus resolving the contradiction between continuous shielding coverage and laser repair accessibility.
Solution Approach 2:
Repair holes are extracted from the transparent shielding electrode, removing material at specific locations to expose the underlying metal lines. This extraction enables direct access to metal lines for laser repair without removing the entire electrode layer, maintaining the electrode's overall function while enabling repair capability.
2Quantity of substance
If the TSS transparent electrode layer covers the data line to form large transparent storage capacitance, then the storage capacitance is improved, but the repair success rate is affected due to potential short circuit during laser repair
Solution Approach 1:
The transparent shielding electrode is segmented by forming repair holes at specific positions, dividing it into multiple isolated regions. This segmentation allows the electrode to maintain its shielding function in non-repair areas while providing access to metal lines in repair areas, thus resolving the contradiction between continuous shielding coverage and laser repair accessibility.
Solution Approach 2:
Repair holes are extracted from the transparent shielding electrode, removing material at specific locations to expose the underlying metal lines. This extraction enables direct access to metal lines for laser repair without removing the entire electrode layer, maintaining the electrode's overall function while enabling repair capability.
Data Source
AI summary
Display panels and array substrates are provided. The array substrate includes a first base, a first metal layer disposed on the first base and including scanning lines, a second metal layer disposed on the first metal layer and including data lines, a third metal layer disposed on the second metal layer and including pixel electrodes, and a fourth metal layer disposed between the third metal layer and the second metal layer. The fourth metal layer includes a transparent shielding electrode in which at least one repair hole is formed. An orthographic projection of the repair hole on the first base overlaps a part of an orthographic projection of at least one of the data lines and the scanning lines on the first base.