Saw Tooth Chip Pocket Milling to Prevent Smartcard Chip Removal
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Solution Overview
Problem
Conventional chip placement methods in smartcards are vulnerable to fraud due to the ease of chip removal and reimplantation, leading to security risks and increased costs for fraud prevention and card replacement.
Innovation Solution
Implementing a saw tooth milling pattern for chip pockets with peaks and valleys, along with adhesive-filled air gaps, to securely adhere the chip, making it difficult to remove and preventing fraudulent reimplantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional smooth milling patterns are used for chip placement, then manufacturing is easier and simpler, but chip security is compromised due to ease of removal
Solution Approach 1:
The patent applies asymmetry by using a saw tooth milling pattern instead of a smooth symmetric pattern. The saw tooth pattern creates asymmetric peaks and valleys that interlock with the chip, making removal difficult while maintaining manufacturing feasibility through standard milling processes.
Solution Approach 2:
The patent uses curved surfaces by creating rounded peaks and valleys in the saw tooth pattern rather than sharp angular features. This curvature allows for easier manufacturing with standard end mills while still providing effective mechanical interlocking to prevent chip removal.
2Reliability
If secure chip adhesion is implemented through complex milling patterns, then chip security is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the chip pocket into multiple peaks and valleys within the saw tooth pattern. This segmentation creates multiple interlocking points that secure the chip effectively while allowing each individual feature to be manufactured with standard milling tools, thereby managing complexity.
3Object-affected harmful factors
If chip removal prevention is implemented, then fraud risk is reduced, but manufacturing time and cost increase
Solution Approach 1:
The saw tooth milling pattern is self-securing, meaning the mechanical interlocking features automatically prevent chip removal without requiring additional adhesives, coatings, or complex assembly steps. This self-service approach reduces manufacturing time and cost while effectively preventing fraud.
Data Source
AI summary
Example embodiments of systems and methods for milling patterns for a card are provided. A chip fraud prevention system include a device including a chip. The chip may be at least partially encompassed in a chip pocket. The chip pocket may include one or more shapes. The one or more shapes may include one or more peaks and one or more valleys. One or more connections may be communicatively coupled to at least one surface of the chip. The one or more connections may be placed between at least one of the one or more peaks or one or more valleys.