Chip Card Substrate Porous Intermediate Layer Adhesion
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Solution Overview
Problem
Chip card substrates face challenges in maintaining layer adhesion under external forces, chemical substances, and temperature variations, particularly when using different polymer materials like PET and PVC, which can lead to delamination and increased manufacturing costs due to the limited adhesion capabilities of conventional adhesives.
Innovation Solution
A chip card substrate design incorporating a first polymer layer, an intermediate layer with micro pores, an adhesive layer, and a second polymer layer, where the intermediate layer with micro pores acts as an anchor for both the adhesive and the polymer layers, enhancing mechanical and chemical adhesion between the layers and preventing delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesives are used to join polymer layers, then the manufacturing process is simple, but the adhesive force is insufficient to prevent peeling under external forces, chemical substances, and temperature variations
Solution Approach 1:
The patent introduces an intermediate layer with a porous structure between the first and second polymer layers. This porous structure increases the surface area and provides mechanical interlocking, significantly enhancing the adhesive force and preventing peeling under external forces, chemical substances, and temperature variations while maintaining manufacturing simplicity.
Solution Approach 2:
The patent creates a composite structure by combining the intermediate porous layer with conventional adhesives between polymer layers. This composite approach leverages both the mechanical interlocking of the porous structure and the bonding properties of the adhesive, achieving high reliability without requiring entirely new adhesive materials or complex manufacturing processes.
2Adaptability or versatility
If different polymer materials are used to create functional layers, then the substrate can perform multiple functions, but the adhesion between layers deteriorates due to material incompatibility
Solution Approach 1:
The patent introduces an intermediate porous layer as a mediator between incompatible polymer materials. This intermediate layer is compatible with both adjacent polymer layers, providing a transition zone that ensures strong bonding between different materials while allowing each layer to maintain its specific functional properties.
Solution Approach 2:
The porous structure of the intermediate layer enhances compatibility between different polymer materials by providing increased surface area for bonding and mechanical interlocking. This porous architecture allows the intermediate layer to effectively bridge material incompatibilities while preserving the functional capabilities of each polymer layer.
3Reliability
If strong adhesives are used to ensure layer bonding, then adhesion improves, but manufacturing costs increase
Solution Approach 1:
The patent uses a porous intermediate layer that can be manufactured through cost-effective processes such as foam formation or porous polymer deposition. This structure provides strong mechanical interlocking and increased bonding surface area, enabling the use of simpler, less expensive adhesives while maintaining high adhesive force and preventing layer delamination.
Solution Approach 2:
The patent creates a cost-effective composite bonding system by combining the porous intermediate layer with conventional adhesives. This composite approach achieves strong layer bonding through the mechanical interlocking provided by the porous structure, reducing reliance on expensive specialty adhesives and lowering overall manufacturing costs while maintaining high reliability.
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 significantly improves the durability and resilience of the chip card substrate by forming a strong, durable connection between the layers, reducing the risk of delamination and lowering production costs by utilizing an adhesive that effectively anchors to both the polymer and intermediate layers.
Implementation Method 1
the intermediate layer with micro pores acts as an anchor for both the adhesive and the polymer layers, enhancing mechanical and chemical adhesion between the layers
Implementation Method 2
enhancing mechanical and chemical adhesion between the layers
Data Source
AI summary
A chip card substrate is provided that includes a first polymer layer including a first polymer material. The chip card substrate further includes an intermediate layer disposed over the first polymer layer and including polyolefin including a plurality of micro pores, an adhesive layer disposed over the intermediate layer and including an adhesive, and a second polymer layer disposed over the adhesive layer and including a second polymer material different from the first polymer material.