Transponder Inlay Substrate with Compressed Peripheral Shoulder
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Solution Overview
Problem
Conventional transponder inlays for personal identification documents face challenges in achieving a thin design while accommodating chip modules and antenna coils without increasing complexity and cost, and protecting against mechanical stresses.
Innovation Solution
A transponder inlay with a substrate layer featuring a window opening that compresses the chip module's peripheral edge to be flush with the surface, using a thermoelastic material for the substrate and embedding the antenna coil in the contact surface, allowing for a thin and mechanically stress-resistant design, and a method involving ultrasonic stamping to create the window opening and peripheral shoulder in a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the substrate layer is made thinner to reduce overall inlay thickness, then the inlay becomes more sleek and less intrusive in documents, but the chip module can no longer be accommodated flush with the surface
Solution Approach 1:
The substrate layer is segmented into two distinct regions: a thinned-out base layer and a localized raised peripheral shoulder formed by selective compression. This segmentation allows the chip carrier to rest on the elevated shoulder while the overall inlay remains thin, resolving the contradiction between reduced thickness and flush accommodation of the chip module.
Solution Approach 2:
The solution introduces a vertical dimension through the compressed peripheral shoulder, creating a stepped structure that elevates the chip carrier support area. This dimensional change enables the chip module to be accommodated flush with the surface in a thin substrate by utilizing the raised shoulder rather than requiring the entire substrate to be thick.
2Manufacturing precision
If conventional milling operations are used to create window openings with peripheral shoulders, then the chip module can be accommodated flush, but the manufacturing process becomes complex and expensive
Solution Approach 1:
The complex mechanical milling process is replaced with a simpler compression-based forming process. Instead of removing material through multiple milling operations to create the peripheral shoulder, the invention compresses the substrate material directly to form the raised shoulder, significantly simplifying the manufacturing process while achieving the same functional result.
Solution Approach 2:
The invention changes the manufacturing parameter from material removal (milling) to material compression (forming). This parameter change transforms a complex multi-step milling process into a simpler single-step compression process that achieves the same peripheral shoulder structure, reducing manufacturing complexity and cost.
3Ease of manufacture
If the chip carrier protrudes beyond the chip housing, then the chip module can be accommodated in a simple window opening, but the inlay becomes thicker and more visible
Solution Approach 1:
The substrate is segmented into a thinned base layer and a localized raised peripheral shoulder. This segmentation allows the chip carrier to be supported at the elevated shoulder level, enabling it to be flush with the surface without requiring the entire substrate to be thick, thus maintaining both manufacturing simplicity and thin profile.
Solution Approach 2:
By introducing the vertical dimension through the compressed peripheral shoulder, the invention creates a stepped structure that accommodates the chip carrier flush with the surface. This dimensional change allows the chip carrier to be visible and supported without increasing the overall inlay thickness, as the raised shoulder provides the necessary support elevation.
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 solution enables the production of thin, cost-effective transponder inlays that maintain the appearance of conventional documents while providing robust protection against mechanical stresses and seamless integration of transponder units.
Implementation Method 1
The peripheral shoulder of the window opening, which allows the chip carrier to be accommodated in such a way that it is flush with the surface, is implemented by compressing the material of the substrate layer in the area of the window opening
Implementation Method 2
a method involving ultrasonic stamping to create the window opening and peripheral shoulder in a single operation
Data Source
AI summary
The invention relates to a transponder inlay (11) for manufacturing a layered structure (40) for a personal document with a substrate layer (12) for arranging a transponder unit (15) that includes an antenna coil (13) and a chip module (14) and which is situated on a contact surface (17) of the substrate layer, wherein the chip module (14) is accommodated in a window opening (30) formed in the substrate layer (12) in such a way that a chip carrier (23) of the chip module rests with its circumferential edge on a compressed peripheral shoulder (24) of the window opening (30); the invention also relates to a method for manufacturing the transponder inlay. In addition, the present invention relates to a layered structure for a personal document, which is provided with such a transponder inlay, and an identification document having such a layered structure.