Will NFC tag work on metal?

Will NFC tag on metal?VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

It depends.VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Scenario 1 - directly tagging the normal nfc tags on metal surfaceVhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

the answer is no. no matter aluminum or steel or other types of material, it doesn't work.  Root reasonVhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

1. RFID wave reflection on metal surface, if reflect wave phase is just 180 degree, then it will completely naturalized with the incoming wave, therefore make the tag unreadable.VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

2. Also metal surface also will destroy the impedance coupling between the tag and reader, which will  lower the power transmit efficiency, which finally lead to tag unable to draw sufficient power from reader to activate itself.VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Both above reasons make the nfc tags unreadable on metal surface.VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Scenario 2- tagging the nfc tags with ferrite layer or isolated with non-metallic materialVhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

this does work. Either physical isolation and apply ferrite layer could greatly improved the tag's performance.VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Ferrite layer, which can either absorbed the reflection RFID signal from metal surface, and physical isolation also will greatly improve the impedance matching, therefore could activate the tags.VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

VhMGEENFC: A Global RFID tag, NFC tag, RFID Solution Provider