6 Questions For Choosing The Right RFID Tag
What Is Bluetooth AOA Technology And Its Applications?
Following the revolution of automation and digitization, data becomes more and more important, including work in process data, product or equipment identity, which can not only improve efficiency, ensure process compliance, but also enable traceability to improve product quality. In the industrial field, high temperature environments exist in many scenarios, such as the SMT process in printed circuit board manufacturing, the painting and drying process, the metal smelting process, the surface treatment process, the injection molding or die casting process in the production of plastic and metal products, and the sterilization in medical treatment, oil exploitation, chemical production, etc., in these scenarios, the temperature is usually between 100 and 250 °C, and in some extreme cases, it can even be as high as 1000 °C.Traditional automatic identification and data collection methods are always not applicable to high temperature environments. As an emerging identification technology, RFID can be used for identification without the requirement of contacting and visualizing, but universal RFID tags can’t withstand high temperature environment, then high temperature RFID tags are needed, high temperature RFID tags generally adopt special chips, special chip packaging, special manufacturing process, or special packaging. Typical high temperature RFID tags are as follows.
1. PCB High Temperature RFID Tag
Some specially made printed circuit boards can withstand high temperatures of about 150-180 degrees in a short time. Although they are easily damaged in high temperature environments for a long time, the cost is relatively cheap. For some applications, the temperature is not high, and the duration is not long, it is an ideal choice.
Usually, PCB High Temperature RFID tags are used for work in process tracking, asset management, etc.
2. Ceramic High Temperature RFID Tag
Due to the high temperature resistant properties of ceramics, Ceramic RFID Tag can withstand up to 250℃, for a longer period. At the same time, due to ceramic’s high dielectric constant, it provides excellent reading performance, but ceramic is fragile and high cost, so ceramic RFID tags are usually used in high temperature only environments, they are fixed on assets with high-temperature glue, to be used in such as surgical instrument tracking, tray management, RTIs management, etc. , When it needs to be used in harsher environments, ceramic high temperature RFID tags are usually embedded in assets and potted with high temperature glue, to be used in such as mold, fixture management, SMT process management, metal parts management, etc.
3. Glass tube High Temperature RFID Tag
Glass has the characteristics of high temperature resistance. By improving the connection process of industrial-grade low-frequency and high-frequency RFID tag antennas and chips, and sealing them into glass tubes, these tags can be used in up to 180℃ high temperature scenarios, however, since glass is fragile and low frequency, high frequency RFID tags have a relatively short identification distance, usually, glass tube RFID high temperature tags are embedded in tools, molds or RTIs for asset management, WIP tracking, and other applications.
4. Plastic High Temperature RFID Tag
In the harsh industrial environment, shock, vibration, impact and even corrosion exist in addition to high temperature. PCB, ceramic and glass tube high temperature RFID tags are often unable to be used in these environments for a long time. Therefore, the above tags need to be repackaged, by using such as the use of two-color injection molding process, to ensure its vacuum inner cavity so that it can be used for a long time at high temperatures up to 280 °C. Silica, PPS, PTFE, Peek are the typical materials used for packaging.
Plastic high temperature RFID tags are widely used in WIP tracking, automotive and industrial product paintshop production, mold management, metal tray management, SMT management, and other scenarios
5. Metal High Temperature RFID Tag
In extremely harsh industrial environments, plastic high-temperature RFID tags still cannot meet the requirements. In this case, RFID tags encapsulated with metal materials are required. The encapsulation materials are usually stainless steel, aluminum, and other metals, and the tags will be made of bolts, nameplates, and other specific form factors, adapting embedded, metal insert molding and other processes.
Metal high-temperature RFID tags are usually used in auto parts production, bicycle production process management, badminton racket production, oil drill pipe, oil pipe management and other scenarios.
6. SAW Ultra High Temperature RFID Tag
The SAW tag is operating in surface acoustic wave technology, the tag chip is made of piezoelectric material other than semiconductor material. Therefore, the chip has incomparable advantages over traditional semiconductor chips and is especially suitable for use in harsh environments, such as high temperature, strong electromagnetic radiation.
Generally, SAW Ultra High Temperature RFID tags can withstand temperatures up to 400°C and can work for a long time at 350°C. By using special materials, SAW RFID tags can withstand temperatures up to 800°C.
The typical applications of SAW RFID tags are ladle tracking in steel manufacturing, asset management under high voltage environment, work in process management under strong electromagnetic interference, assets tracking in a radiation environment, etc.