RFID Tag Housing with Segmented Wiring Antenna for Laundry Durability
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Solution Overview
Problem
Radio frequency identification (RFID) tags are prone to damage during industrial laundry processes such as washing, spinning, and drying due to their electronic structure, which requires a specialized protection mechanism to prevent breakage.
Innovation Solution
A novel RFID tag design featuring a housing shaped as a stripe with an inlay containing a packaged chip and wiring antenna, where a cladding layer covers the chip and a portion of the antenna, and the wiring antenna has extension portions with a curved connection to enhance flexibility and prevent breakage during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RFID tag uses a conventional wiring antenna structure directly connected to the chip, then the electrical connection is simple, but the antenna is prone to breakage during laundry processes
Solution Approach 1:
The wiring antenna is divided into multiple sections: a first wiring section extending from the chip along the longitudinal side, and a second wiring section extending from the first wiring section along the lateral side. This segmentation allows each section to be optimally positioned to resist bending forces during laundry processes, reducing breakage risk while maintaining electrical connectivity.
Solution Approach 2:
The antenna wiring transitions from a simple linear connection to a multi-dimensional layout that extends along both the longitudinal and lateral sides of the chip. This spatial arrangement distributes mechanical stress across different dimensions, preventing concentration of force at single connection points and thereby improving reliability during washing and drying cycles.
2Strength
If the RFID tag housing is made rigid to protect the electronic components, then the protection against damage is improved, but the flexibility and adaptability to bending during laundry is reduced
Solution Approach 1:
The housing is constructed from flexible materials that can bend and deform without causing damage to the internal electronic components. This flexible shell allows the RFID tag to adapt to the bending and flexing that occurs during laundry processes while still providing adequate protection for the chip and antenna assembly.
Solution Approach 2:
The housing design incorporates dynamic characteristics that allow it to flex and return to its original shape, rather than being completely rigid. This dynamic flexibility enables the housing to absorb mechanical stresses during washing and drying while maintaining structural integrity and protecting the electronic components inside.
3Volume of moving object
If the wiring antenna is positioned close to the chip for compact design, then the device size is reduced, but the risk of damage during laundry processes increases
Solution Approach 1:
The antenna wiring is segmented into sections that extend along the longitudinal and lateral sides of the chip, creating a distributed layout that maintains compact overall dimensions while providing mechanical separation between critical connection points. This segmentation reduces stress concentration and improves reliability without significantly increasing the tag's volume.
Solution Approach 2:
The antenna design utilizes both longitudinal and lateral spatial dimensions to position wiring sections away from the chip in a distributed manner. This multi-dimensional arrangement increases the effective distance between critical components without proportionally increasing the overall tag volume, thereby improving damage resistance while maintaining compact size.
Data Source
AI summary
A radio frequency identification tag includes a housing shaped as a stripe defining a longitudinal side and an inlay disposed within the housing. The inlay includes a carrier board supporting a packaged chip and a wiring antenna in connection with the packaged chip. The wiring antenna is formed with an electrical joint directly and electrically connecting the packaged chip and an extension portion directly extending out of the electrical joint. The extension direction of the extension portion is substantially perpendicular to the longitudinal side.