Identity Carrier Enclosed in Polymer Shell for Circuit Card
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Solution Overview
Problem
The existing SIM cards in telematic systems face issues with contact reliability in aggressive environments, high temperatures causing plastic softening, increased size relative to other components, and theft risks due to their size and design.
Innovation Solution
An identity carrier with a chip enclosed in a polymer shell and connected via permanently bonded or soldered conducting legs, designed for direct assembly to a circuit card, reducing size and enhancing reliability in harsh conditions while allowing for standardization and efficient handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional SIM card with plastic support and spring-loaded contacts is used, then the device can be easily manufactured and assembled, but the contact reliability deteriorates in aggressive environments due to oxidation and mechanical fatigue
Solution Approach 1:
The invention extracts the SIM card from its traditional plastic support structure and spring-loaded holder, creating an identity carrier that is directly mounted on the circuit card. This eliminates the intermediate holder structure that is susceptible to oxidation and mechanical fatigue, directly resolving the contact reliability issue in aggressive environments.
Solution Approach 2:
The identity carrier is merged directly with the circuit card through permanent bonding or soldering of conducting legs to circuit traces. This integration eliminates the separate holder component and its vulnerable contacts, creating a unified structure that resists oxidation and mechanical fatigue.
2Temperature
If a traditional SIM card with plastic support is used, then the card can be easily manufactured, but the plastic softens and loses integrity at high temperatures
Solution Approach 1:
The invention removes the plastic support structure entirely, replacing it with an identity carrier that is directly bonded to the circuit card. This eliminates the temperature-sensitive plastic component, allowing the device to withstand high temperatures without structural degradation.
3Volume of moving object
If a traditional SIM card with holder is used, then the assembly process is simple, but the overall size increases relative to other electronic components
Solution Approach 1:
The invention extracts and eliminates the holder structure from the traditional SIM card design, reducing the overall volume of the identity carrier. This compact design allows the identity carrier to be smaller than conventional SIM cards while maintaining functionality.
Solution Approach 2:
By merging the identity carrier directly with the circuit card through conducting legs, the invention eliminates the need for a separate holder structure. This integration reduces the overall volume while the conducting legs provide both electrical connection and mechanical attachment functions.
4Reliability
If a traditional SIM card design is used, then the card can be easily replaced, but the risk of theft increases due to the card's size and design
Solution Approach 1:
The invention extracts the identity carrier from the traditional removable SIM card format, creating a compact unit that is permanently integrated into the device. This eliminates the large, easily removable SIM card that is susceptible to theft.
Solution Approach 2:
By merging the identity carrier with the circuit card through permanent bonding, the invention creates a unified structure that cannot be easily removed or stolen. The conducting legs serve both electrical and mechanical attachment functions, securing the identity carrier to the device.
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 identity carrier ensures reliable electrical connection, reduces size, and minimizes theft risks, while being suitable for use in aggressive environments and efficient assembly processes, thus enhancing the functionality and durability of telematic units.
Implementation Method 1
The connecting means are adapted to being bonded or soldered permanently
Data Source
AI summary
The present invention relates to an identity carrier(Subscriber Identifier) configured for interaction with a telematic unit for subscriber identification in the mobile telephone network. The identity carrier comprises a chip (2) which has a configuration capable of being personalised and being connected to a subscription at a telecommunications operator, a support bearing (4) the chip (2), and connecting means (3) permanently connected to the chip's connection points to render them connectable. The identity carrier is distinguished in that the support is arranged to enclose the chip and that the connecting means are arranged to extend through said enclosure to connectable locations outside the support. A method for production of such an identity carrier and the latter's use in a telematic unit as well as a telematic unit are also covered by the present invention.