Display Interconnect Insulation Layout Against Line Oxidation
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Solution Overview
Problem
The oxidation of connection and transfer lines in display devices due to hydrogen radicals and ammonia gas generated during the formation of the inorganic insulating layer, leading to potential damage and reduced reliability.
Innovation Solution
Incorporating an organic insulating layer between the inorganic insulating layer and the connection and transfer lines, with a specific configuration that includes additional insulating layers to prevent direct contact and exposure, thereby blocking the path for hydrogen radicals and ammonia gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic insulating layer is formed to provide insulation, then insulation performance is improved, but hydrogen radicals and ammonia gas are generated that cause oxidation of lower conductive layers
Solution Approach 1:
An organic insulating layer is introduced as an intermediary between the inorganic insulating layer and the lower conductive layers. This organic layer acts as a protective barrier that prevents hydrogen radicals and ammonia gas from reaching and oxidizing the conductive layers, while still maintaining the necessary insulation functionality.
Solution Approach 2:
The patent employs a composite insulating structure combining both organic and inorganic insulating layers. The inorganic layer provides primary insulation and protective properties, while the organic layer supplements this by specifically blocking harmful gas diffusion to conductive layers, creating a synergistic protective system.
2Area of stationary object
If the inorganic insulating layer is extended to cover more areas, then insulation coverage is improved, but the exposure of connection lines and transfer lines to harmful gases increases
Solution Approach 1:
The organic insulating layer serves as a protective intermediary that extends the protection to connection lines and transfer lines. By positioning this organic layer between the inorganic insulating layer and the conductive elements, it prevents harmful gases from reaching these lines even as the inorganic layer coverage is extended.
Solution Approach 2:
The insulating system is segmented into multiple functional layers: the inorganic insulating layer provides primary insulation coverage, while the organic insulating layer provides secondary protection specifically against gas diffusion. This segmentation allows each layer to perform its specialized function without compromising the other.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents oxidation of connection and transfer lines, reducing defects and enhancing the reliability of the display device by minimizing the exposure of these lines to harmful gases.
Implementation Method 1
When the inorganic insulating layer is oxidized, hydrogen radicals and ammonia gas may be released. When hydrogen radicals and ammonia gas reach a lower conductive layer, the lower conductive layer may also be oxidized.
Data Source
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AI summary
A display device includes: a substrate including a display area, a pad area spaced apart from the display area in a first direction, and a bending area disposed between the display area and the pad area, a transfer line overlapping the pad area and extending from pad area in a direction opposite to the first direction, a connection line disposed on the transfer line, connected to the transfer line, and overlapping the bending area, an organic insulating layer disposed on the connection line and entirely overlapping the connection line, and an inorganic insulating layer disposed on the organic insulating layer, defining an opening overlapping the organic insulating layer, and overlapping one end of the organic insulating layer.