Transponder Insert Module for Contactless Card Manufacturing
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Solution Overview
Problem
The manufacturing process of contactless electronic devices, such as passports and microcircuit cards, is complex due to the need for reliable connections between antennas and microcircuits, which are critical for ensuring the longevity and functionality of these documents.
Innovation Solution
A transponder insert with a substrate and transponder assembly is designed as a microcircuit module, where the microcircuit is assembled using a 'flip-chip' method or 'Wire Bonding', and the antenna extends around the microcircuit, housed within a multilayer structure to simplify and secure the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna and microcircuit are directly incorporated into the substrate with the antenna following the outer contour, then the device can be housed in the thickness of the multilayer structure, but the manufacturing process becomes particularly complex due to connection reliability requirements
Solution Approach 1:
The device is divided into distinct functional modules: the substrate layer, the antenna layer, and the microcircuit layer. This segmentation allows each component to be manufactured and prepared separately, then assembled together, reducing overall manufacturing complexity while maintaining compact housing.
Solution Approach 2:
Connection elements (such as conductive traces or bonding structures) are introduced as intermediary components between the antenna and microcircuit. These intermediaries facilitate reliable electrical connection while simplifying the assembly process and reducing direct connection complexity.
2Shape
If direct connection between antenna and microcircuit is implemented, then the device structure is compact, but the connection reliability is compromised leading to untimely disconnections
Solution Approach 1:
The design incorporates connection elements with sufficient mechanical strength and electrical conductivity that are prepared in advance to withstand operational stresses. These pre-engineered connection structures cushion against potential failure modes, ensuring long-term reliability while maintaining compact dimensions.
Solution Approach 2:
The connection structure utilizes composite material properties combining conductive materials with mechanically robust substrates. This composite approach ensures both electrical connectivity and mechanical reliability within a compact form factor.
3Volume of moving object
If the antenna follows the outer contour of the substrate, then the device can be housed in the thickness of the multilayer structure, but the manufacturing process becomes complex
Solution Approach 1:
The antenna design transitions from a two-dimensional planar contour following approach to a three-dimensional structured arrangement using vertical stacking and layered construction. This dimensional change allows the antenna to maintain its functional contour while simplifying manufacturing through standard layered assembly processes.
Data Source
Figure 1~4
AI summary
The insert (10) has a transponder assembly including a microcircuit and an antenna that is connected to the microcircuit. The transponder assembly is provided in a microcircuit module (26). A substrate comprises a receiving cavity (28) dimensioned to receive the entire microcircuit module. The cavity is opened on a face of the substrate. The microcircuit module comprises a support that carries the microcircuit and the antenna. The cavity is defined by bottom and a peripheral wall. An independent claim is also included for a device such as passport and chip card that conforms to ISO 7816standard.