Capacitor Structure Insulation for Display Panel Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display panels are prone to capacitor short circuits due to foreign matter or defects in the interlayer dielectric or planarization layer, leading to pixel illumination failure.
Innovation Solution
The display panel incorporates a capacitor structure with at least two insulating layers between the anode and active region, and between the light shielding metal layer and capacitor metal layer, ensuring electrical connections between the active region and light shielding metal layer, and anode and capacitor metal layer, respectively, to prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planar capacitor structure with only one insulating layer is used, then the manufacturing process is simple, but the capacitor is easily shorted by foreign matter or defects in the interlayer dielectric layer
Solution Approach 1:
The single insulating layer is segmented into multiple insulating layers (first insulating layer and second insulating layer) stacked vertically between the first plate and second plate of the capacitor. This segmentation increases the insulation distance and provides multiple barriers against short circuits caused by foreign matter or defects, while maintaining manufacturing feasibility through sequential deposition processes
Solution Approach 2:
The solution transitions from a single-layer insulating structure to a multi-layer stacked structure in the vertical dimension. By adding the second insulating layer above the first insulating layer, the capacitor gains enhanced reliability through increased dielectric thickness without significantly complicating the lateral manufacturing process
2Device complexity
If the first plate and second plate are separated by only one insulating layer, then the device structure is simple, but foreign matter or defects in the interlayer dielectric layer cause capacitor shorting
Solution Approach 1:
The second insulating layer is deposited beforehand as an additional protective barrier above the first insulating layer. This prior cushioning approach prevents foreign matter or defects in the lower interlayer dielectric layer from causing short circuits, as the second insulating layer provides an extra isolation barrier before the capacitor plates make contact
Solution Approach 2:
The capacitor structure employs a composite insulating system consisting of two different insulating layers with potentially different material compositions. This composite structure combines the advantages of multiple materials to provide both electrical isolation and protection against foreign matter, enhancing overall capacitor reliability
Data Source
AI summary
A display panel and method of fabricating thereof. The display panel includes a capacitor structure, a first plate of the capacitor structure includes an active region and a light shielding metal layer which are electrically connected, and a second plate of the capacitor structure includes an anode and a capacitor metal layer which are electrically connected. The anode and the active region are disposed correspondingly, and at least two insulating layers are disposed between the anode and the active region, the light shielding metal layer and the capacitor metal layer are disposed correspondingly, and at least two insulating layers are disposed between the light shielding metal layer and the capacitor metal layer.