Electrical Module Terminal Structure for Impurity Control
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Solution Overview
Problem
Existing electrical modules and display panels face challenges in reliability and convenience due to issues with impurity diffusion and terminal connectivity, which affect their performance and durability.
Innovation Solution
The development of an electrical module with a functional layer comprising an element, a conductive film, and an intermediate layer, where the intermediate layer includes silicon and oxygen, and the conductive film includes titanium or tungsten, allowing for efficient electrical connection and reduced impurity diffusion through a carefully designed opening portion and terminal structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional terminal structure is used without a controlled first region, then the terminal connectivity is simpler, but impurity diffusion occurs and reliability deteriorates
Solution Approach 1:
The terminal structure is segmented into distinct regions: a first region with controlled width (ten times or less the intermediate layer thickness) at the periphery of the opening portion, and the conductive film extending into the opening portion. This segmentation allows the first region to serve as a barrier against impurity diffusion while the conductive film provides electrical connectivity, thus improving reliability without excessive complexity.
Solution Approach 2:
The first region is designed with specific local properties: its width is controlled to be ten times or less the thickness of the intermediate layer, and it is positioned at the periphery of the opening portion where it contacts the conductive film. This local quality control prevents impurity diffusion at the critical interface while maintaining overall structural functionality.
2Reliability
If the first region width is large, then the contact area with conductive film increases improving connectivity, but impurity diffusion increases reducing reliability
Solution Approach 1:
The width of the first region is precisely controlled as a critical parameter - set to ten times or less the thickness of the intermediate layer. This parameter change optimizes the balance between providing sufficient contact area for electrical connectivity and minimizing the pathway for impurity diffusion, thereby improving reliability while preventing harmful impurity diffusion.
3Productivity
If the opening portion does not overlap with the conductive film, then the intermediate layer structure is simpler, but electrical connection efficiency decreases
Solution Approach 1:
The opening portion is designed to overlap with the conductive film, allowing the intermediate layer to serve multiple functions: providing structural support, enabling electrical connection through the overlapping conductive film, and preventing impurity diffusion through the controlled first region. This multi-functionality improves electrical connection efficiency without excessive structural complexity.
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
This configuration enhances the reliability and convenience of electrical modules and display panels by ensuring stable electrical connections and preventing impurity diffusion, leading to improved performance and durability.
Implementation Method 1
an intermediate layer, wherein the intermediate layer includes a first surface and an opening portion, the opening portion overlaps with the conductive film, the first surface includes a first region, and the first region is in contact with the conductive film
Implementation Method 2
The element is electrically connected to the conductive film... the element can be electrically connected to an external device through the conductive film provided in the opening portion
Data Source
AI summary
A novel electrical module that is highly convenient or reliable is provided. A novel display panel that is highly convenient or reliable is provided. A novel display device that is highly convenient or reliable is provided. The functional layer includes an element, a conductive film, and an intermediate layer and the element is electrically connected to the conductive film. The intermediate layer includes an opening portion and a first surface, the opening portion overlaps with the conductive film, the opening portion includes a side end portion, and the side end portion is in contact with the conductive film. Moreover, the first surface includes a first region, the first region is positioned at the periphery of the opening portion, and the first region is in contact with the conductive film.