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"Internet of Things" is one of the most talked-about terms today. Bus cards and access cards are everyday examples of IoT applications that have been around for a long time. Last year, the Shanghai World Expo was held successfully, and its tickets played a crucial role. These seemingly simple tickets were actually embedded with RFID technology, one of the core technologies of the Internet of Things. The RFID electronic tag chip used in these tickets was developed by Shanghai Huahong IC Design Co., Ltd. This small but powerful chip could collect the number of people entering the Expo each day, update in real-time, and help manage crowd flow more efficiently. It marked the largest application of RFID technology in the global ticket market.
These tiny RFID tags may be unnoticeable, but they bring convenience and smoothness to daily life. Today, let’s visit the Shanghai Zhangjiang IC Development Zone and uncover the great intelligence behind this small label.
**Small Label, Big Production**
To create an RFID electronic tag, the first step is to purchase a high-quality RFID chip with a high read rate and large storage capacity. One of the leading companies in the Shanghai Zhangjiang IC Development Zone, Shanghai Kunrui Electronic Technology Co., Ltd., has developed Asia's first ultra-high-frequency EPC-certified RFID chip—QR2235—with the support of its strong R&D team and extensive experience in RFID chip design.
Once the chip is selected, it needs to be paired with a suitable antenna and packaged using a cost-effective and efficient RFID tag packaging device. To explore this process, we visited Shanghai Jinglu Electronic Technology Co., Ltd., located in the same development zone. There, they introduced their "FLIP-CHIP MOUNTER automatic high-speed flip-chip machine," which is at the forefront of domestic technology and offers excellent cost-performance. Its price is less than half of similar foreign models, making it ideal for Chinese enterprises.
The machine works by placing a roll of etched or printed antenna on the device. As the machine operates, the antenna is automatically fed into the system, where conductive glue is applied to each contact point. The chip is then placed onto the contact points, and the whole assembly is hot-pressed to ensure a secure bond. Within minutes, the RFID core emerges from the other end, ready to be rolled up. This entire process requires minimal manual intervention, making it highly efficient and easy to operate.
After the RFID core is produced, the next step is to give it a stylish appearance. We visited Shanghai Shenbo Intelligent Label Technology Co., Ltd., a pioneer in RFID smart tags in the Greater China region. Using the first MELZER production line in Asia dedicated to RFID smart tags and ticket cards, Shenbo packages the RFID core into various forms. According to the company’s general manager, Tang Zhengxing, customers only need to explain their needs, and Shenbo’s professional team will tailor the RFID tags accordingly. These tags are widely used in areas such as smart access control, logistics, anti-counterfeiting, and ticket management.
**Small Label, Big Test**
Having visited three companies, you now understand the basic process of manufacturing RFID electronic tags. But before we move on, it’s important to note that ensuring the proper performance of RFID tags in real-world applications requires rigorous testing.
To learn more about this, we visited the Shanghai Zhangjiang RFID Application Testing Public Service Platform. Professor Wang Dong explained that RFID tags must undergo a variety of application tests before deployment. For example, in a scenario where an RFID tag is attached to a bottle of mineral water, the question becomes: where should the tag be placed to achieve the best reading rate? Through specialized software systems developed by the RFID team at Shanghai Jiao Tong University, the reader antenna can scan the bottle, and data analysis helps determine the optimal placement. Since the contents and stacking methods vary, the effect on electromagnetic signals differs, making testing essential for optimal performance.
This thorough testing ensures that RFID tags function reliably in different environments, proving that even the smallest labels hold great potential in the world of smart technology.