What is RFID?
RFID (radio frequency identification) is a technology, comprised of a microchip and an antenna, which uses electromagnetic waves to identify and track objects. Objects equipped with RFID tags transmit digital data to RFID readers, when triggered by them, often in order to identify and track inventory goods.
With the rise of Industry 4.0 and global electrification processes, RFID tags are becoming more prevalent than ever. As a result, the global market value of RFID systems is expected to rise from $12.08 billion in 2020 to $16.23 billion by 2029. This is accompanied by the rise of increasingly innovative products made for bonding RFID tags and optimising products which utilise them.
Uses of RFID
RFID tags are commonly found in:
- Bank cards
- Entry fobs
- Medical tracking applications
- Library books
- Security tags
- Vehicle tracking applications
RFID bonding is carried out at various levels, which we will now explore.
Bonding Microchip to Tag
Bonding the RFID microchip to the tag itself is the first step in RFID bonding. This process is usually carried out using epoxy adhesives, especially those exhibiting dielectric properties. Anisotropic adhesives may also be used in applications requiring conduction in one axis but electrical resistance in another direction.
Araldite 2014-2 is an epoxy adhesive that is ideal for bonding electronic components and printed circuit boards (PCBs). It provides excellent resistance to water and chemicals, provides superior gap-filling and is non-sagging up to 5mm thickness. It exhibits high bond strength and is grey in colour.
Bonding Tag to Everyday Goods
When bonding RFID tags to everyday items, such as library books, pressure-sensitive adhesives can be used for ease of application. This type of bonding is ideal for such applications as they don’t require long-term durability against harsh conditions. Learn the differences between different types of adhesives, such as pressure-sensitive adhesives, here.
Bonding Tag to Equipment and Tools
Cyanoacrylate adhesives can be used to bond RFID tags to substrate surfaces of devices in a matter of seconds.
Permabond 820 is a cyanoacrylate adhesive ideal for bonding electronic components in position on dual-sided PCBs before soldering. This can be used for bonding the RFID tag or antenna in place, ensuring it maintains its efficacy over a long time. It is easy to use, colourless and quick setting.
Epoxy adhesives, such as Araldite 2014-2, can also be used to bond RFID tags, especially onto medical equipment. This is due to high-temperature resistant epoxy adhesives resisting autoclaving, in addition to their excellent resistance against water and chemicals.
Encapsulating the Tag
Encapsulation of RFID tags is the ultimate way to protect the tag from environmental hazards and physical tampering. This is the best way to ensure long-term durability, helping to protect the RFID chip inside. See our full range of electronic encapsulants and learn how potting and encapsulation compounds are used to protect electronic components.