Multilayer Positioning Graphic Component for TFT LCD Substrate Detection
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Solution Overview
Problem
In the manufacturing of TFT LCDs, positioning graphic components with a monolayer metal structure often suffer from incomplete coverage by insulating films during chemical vapor deposition, leading to portions being etched and rendering them incomplete, resulting in glass substrate waste.
Innovation Solution
A positioning graphic component comprising at least two layers of metal layer patterns with an insulating layer in between, where the second layer of metal pattern covers any uncovered portions of the first layer, ensuring complete protection and integrity during subsequent etching steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a monolayer metal structure is used for the positioning graphic component, then the manufacturing process is simple, but the chemical vapor deposition cannot cover the edges entirely, causing portions to be etched away and resulting in incomplete components
Solution Approach 1:
The positioning graphic component is divided into multiple metal layers (first metal layer pattern and second metal layer pattern) separated by an insulating layer. This segmentation allows each layer to be independently formed and protected, ensuring that even if one layer is partially etched, the other layers remain intact to maintain component functionality.
Solution Approach 2:
The solution transitions from a two-dimensional monolayer structure to a three-dimensional multilayer structure by adding vertical stacking of metal layers with an insulating layer in between. This dimensional change enables the component to extend through multiple layers, providing redundancy and ensuring completeness even when deposition coverage is incomplete at any single layer.
2Productivity
If the chemical vapor deposition area does not cover the edges entirely, then the filming process is efficient, but portions of the positioning graphic component remain unprotected and are etched in subsequent procedures
Solution Approach 1:
The first metal layer pattern is formed and protected with an insulating layer before the second metal layer pattern is deposited. This preliminary protection ensures that even if the insulating film deposition does not cover the entire edge area, the first metal layer is already protected, and the second layer can be formed to complete the positioning graphic component.
Solution Approach 2:
The insulating layer is deposited between the two metal layers to provide protective cushioning. This insulating layer acts as a buffer that prevents etching of the first metal layer, ensuring that partial deposition deficiencies do not lead to complete component failure.
3Device complexity
If a single metal layer is used, then the structure is simple, but incomplete protection leads to etching of uncovered portions and waste of glass substrates
Solution Approach 1:
The metal structure is segmented into multiple layers with an insulating layer between them. This segmentation creates redundant protective structures, ensuring that if one layer is partially etched, the other layers remain to maintain the positioning graphic component's integrity, thereby preventing glass substrate waste.
Solution Approach 2:
The positioning graphic component uses a composite structure combining multiple metal layers with an insulating layer in between. This composite material approach provides enhanced protection and redundancy, ensuring component completeness and preventing waste of valuable glass substrates.
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 solution prevents incomplete positioning graphic components, enhancing yield by ensuring complete coverage and protecting the metal layers from etching, thus maintaining the integrity of the component for substrate detection.
Implementation Method 1
An silicon nitride insulating material 22 is deposited on the patterned cross 20 via the chemical vapor deposition
Data Source
AI summary
The present disclosure discloses a positioning graphic component for substrate detection and a method of manufacturing the same. The positioning graphic component for substrate detection comprises at least two layers of metal layer patterns and an insulation layer placed between any two layers of metal layer patterns. The present disclosure solves the problem of the occurrence of an incomplete positioning graphic component due to incomplete coverage by the insulation layer in processing TFT LCDs, thus improving the yield.