Plated Module for IC Card with Stress-Absorbing Bridges
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Solution Overview
Problem
The existing plated modules for IC cards are prone to damage and stress, particularly around the recess where the printed circuit and integrated circuit chip are located, leading to potential detachment of the chip and failure of communication connections due to external forces and static electricity.
Innovation Solution
The introduction of a plated module with extended conductive areas linked by bridges and surrounded by insulating channels, which act as a mechanical bypass to absorb forces and distribute stress, protecting the contact points and maintaining communication connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the integrated circuit chip is restricted to a small size and protected through a printed circuit, then the chip is protected from physical pressures and static electricity, but the module remains vulnerable to forces acting near the recess circumference that can cause partial detachment of the chip
Solution Approach 1:
The conductive areas are segmented into two functional zones: standard conductive areas for electrical connection and extended conductive areas for mechanical stress absorption. This segmentation allows the module to simultaneously maintain electrical functionality while gaining enhanced mechanical resistance to deforming forces.
Solution Approach 2:
The extended conductive areas act as a pre-established cushioning structure that absorbs deforming forces before they can reach and damage the contact points or cause chip detachment. This beforehand cushioning mechanism protects vulnerable components from external mechanical stresses.
2Adaptability or versatility
If the plastic support is deformed or stressed, then the forces act in proximity to the external circumference of the recess, but this causes partial detaching of the integrated circuit chip from the plastic support
Solution Approach 1:
The extended conductive areas serve as an intermediary structure between the plastic support and the integrated circuit chip. This intermediary absorbs and distributes deforming forces, preventing direct transmission of stress to the chip attachment points and maintaining stable attachment even when the plastic support is deformed.
3Reliability
If the contact points are not protected, then the communication between the integrated circuit chip and external read write device may fail, but adding protection structures increases device complexity
Solution Approach 1:
The extended conductive areas perform multiple functions simultaneously: they maintain electrical conductivity for signal transmission and provide mechanical protection for contact points. This multi-functionality reduces the need for separate protection structures, thereby limiting the increase in device complexity while improving reliability.
4Strength
If the conductive areas are extended and linked by bridges, then the stress is distributed and contact points are protected, but the manufacturing process becomes more complex
Solution Approach 1:
The extended conductive areas are merged with the standard conductive areas through conductive bridges, creating a unified conductive network. This merging approach allows the stress-resistant structure to be integrated into the existing printed circuit manufacturing process, minimizing the impact on manufacturing simplicity while achieving enhanced strength.
Data Source
AI summary
A plated module is for an IC card and includes a printed circuit having a plurality of conductive areas, delimited by a network of insulating channels, for covering an integrated circuit chip intended to be hosted in a recess of a plastic support of the IC card. At least some of the conductive areas are connected to a corresponding contact points of the integrated circuit chip. At least some of the conductive areas are linked to corresponding extended areas by one or more bridges. The conductive areas are separated from the extended areas by an insulating channel crossed by the bridges. The insulating channels surround the conductive areas as a protection frame for the contact points. At least a major side of at least one of the conductive areas may be curved. Several of the advanced extended areas form a rounded border of the plated module.