Alps Develops Liqualloy Magnetic Sheets for RFID Applications

(Product News, 2 Nov 2005)

Alps Electric Co. Ltd has developed the HMLSR Series of Liqualloy magnetic sheets for RFID applications. The new magnetic sheets utilize Alps’ Liqualloy metallic glass powder to boost the sensitivity of RFID antennas.

In RFID technology, it is not unusual to install parts and devices on the back of wireless tag antennas that send and receive data from the tag between devices. Under some conditions, this causes interference with waves that should reach the antenna. Alps' new sheets effectively focus waves to the antenna, increasing RFID antenna sensitivity.

The sheet employs Alps’ proprietary Liqualloy, a metallic glass powder consisting primarily of iron. The amorphous structure of Liqualloy allows a high degree of freedom in the shaping process, and it displays soft magnetic properties that can be readily activated by exposure to magnetic fields. In addition, its high permeability is 1.3 times greater than that of Fe-Al-Si alloys, the leading magnetic material, giving it superior capacity to absorb radio and electromagnetic waves.

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