Flexible Membrane Vacuum Lamination for Display Substrates
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Solution Overview
Problem
Current rigid-to-rigid substrate lamination processes for displays, such as LCDs, face inefficiencies due to gas entrapment and lack of intimate substrate contact, leading to optical anomalies and poor assembly quality.
Innovation Solution
A substrate lamination apparatus using a flexible membrane to apply pressure within a vacuum chamber, ensuring intimate contact between substrates via pressure-sensitive adhesive, while minimizing air bubbles and using a controlled environment for precise alignment and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rigid-to-rigid substrate lamination processes are used, then substrates can be joined together, but gas entrapment occurs and intimate substrate contact is not achieved, leading to optical anomalies and poor assembly quality
Solution Approach 1:
The patent extracts and removes trapped gas from the lamination interface by introducing a vacuum chamber that evacuates air and gases from between the substrates during the bonding process, preventing gas entrapment and ensuring intimate contact
Solution Approach 2:
The patent creates a controlled vacuum environment (inert atmosphere) within the chamber to eliminate harmful gases and air from the lamination interface, allowing substrates to bond without optical anomalies caused by gas pockets
2Manufacturing precision
If pressure is applied to ensure intimate substrate contact, then adhesion quality improves, but air bubbles and gas entrapment increase without proper gas removal mechanisms
Solution Approach 1:
The vacuum chamber extracts and removes air bubbles and gases from between the substrates before and during pressure application, allowing intimate contact to be achieved without trapping harmful gas pockets that would cause defects
Solution Approach 2:
The patent maintains continuous vacuum evacuation throughout the pressure application process, ensuring that as substrates are pressed together, any gas attempting to become trapped is continuously removed, maintaining both pressure contact and gas-free interface
3Ease of manufacture
If lamination is performed without a controlled environment, then the process is simpler, but alignment precision and adhesion control are compromised
Solution Approach 1:
The vacuum chamber serves as an intermediary controlled environment that provides both mechanical support for precise alignment and environmental control for consistent adhesion, while maintaining a relatively simple overall process structure
Solution Approach 2:
The patent controls key parameters (pressure, vacuum level, temperature) within the chamber to optimize both alignment precision and adhesion quality, demonstrating that controlled parameter changes can improve precision without significantly complicating the manufacturing process
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
The apparatus achieves high-quality lamination by reducing gas entrapment, ensuring uniform adhesion, and improving optical clarity, thereby enhancing the performance and reliability of rigid-to-rigid substrate assemblies.
Implementation Method 1
A substrate lamination apparatus using a flexible membrane to apply pressure within a vacuum chamber, ensuring intimate contact between substrates via pressure-sensitive adhesive, while minimizing air bubbles
Implementation Method 2
A substrate lamination apparatus using a flexible membrane to apply pressure within a vacuum chamber, ensuring intimate contact between substrates via pressure-sensitive adhesive
Data Source
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AI summary
A substrate lamination apparatus (100), the apparatus comprising: a vacuum chamber (110), a flexible membrane (120), the flexible membrane partitioning the vacuum chamber into a first compartment (121) and a second compartment (122), a substrate support (130), and a substrate alignment insert (140) comprising a base portion (141) and at least one substrate alignment guide (142).