Conductive Layer Slits Prevent Peeling in Display Panels
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Solution Overview
Problem
In liquid crystal display devices, the conductive layers and wirings at the edges of TFT substrates are prone to peeling and electrostatic discharge damage during manufacturing, leading to faulty connections and corrosion, which can result in conduction failures.
Innovation Solution
The implementation of slits on the conductive layers extending from one end face to the other, alternately positioned and overlapping in the width direction, or provided in oblique directions, to prevent peeling and corrosion by creating a flexible and easily cut-off structure that short-circuits and grounds the wirings, thereby enhancing connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conductive layer extends to the end face of the substrate, then the wiring can be connected to external components, but peeling occurs at the end portion during ACF removal
Solution Approach 1:
The conductive layer is divided into multiple segments by forming slits that extend from the end face toward the inner side. These slits segment the continuous conductive layer into discrete sections, allowing the end portion to be flexibly connected to external components while preventing peeling from propagating along the entire length of the wiring.
2Reliability
If the conductive layer is made flexible for connection, then connection reliability improves, but the structure becomes more prone to deformation and peeling
Solution Approach 1:
The slits are positioned specifically in the region where flexibility is needed (near the end face for connection), while the main body of the conductive layer maintains its structural integrity. This local modification provides flexibility only where required without compromising the overall stability of the wiring structure.
3Reliability
If slits are provided in the conductive layer, then peeling is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The slits are formed in the conductive layer during the manufacturing process, before the ACF removal and connection steps. This preliminary structuring prevents peeling from occurring in the first place during subsequent handling and assembly operations, rather than attempting to address peeling after it occurs.
Data Source
AI summary
The proceeding of peeling of a conductive layer in the vicinity of terminals is prevented. A display panel includes a conductive layer extending to the outside of terminals, and the conductive layer has slits extending in directions from one end face to the other end face alternately at two end faces along the extending direction of the conductive layer.