Ithegi ye-NFC anti metal yenziwe nge-glue yephepha okanye ikhadi le-PVC elinomaleko wezinto ezifunxayo, ezinokufezekiswa isiphumo sokuphazamiseka kwe-anti metal. Ileyibhile ingafundwa kwaye ibhalwe phezu komphezulu wesinyithi. I-PVC enelebhile enganyangekiyo yesinyithi inokuthintela amanzi, i-asidi, i-alkali kunye nokungqubana, kwaye ingasetyenziswa ngaphandle.
Ithegi ye-NFC anti metal eveliswa yi-MINA inokuba neendidi ezine ezilandelayo zeelebheli ze-NFC:

Uhlobo lokuqala lwethegi ye-NFC anti metal lusekelwe kwiprotokholi ye-14443a. Imemori yelebhile encinci yi-96 bytes, enokwandiswa ngokuguquguqukayo. Ukuba iithegi ziquka kuphela indawo yokugcina yokufunda nokubhala elula, njengokusetyenziswa komsebenzi wepowusta olula okrelekrele, ezo thegi ziyafumaneka ngokupheleleyo. Olu hlobo lwethegi lusetyenziswa kakhulu ukufunda ulwazi kwaye lunezibonelelo zokusebenza okulula kunye neendleko eziphantsi.

Uhlobo lwesibini lweleyibhile ye-NFC yokulwa nesinyithi lusekelwe kwiprotocol ye-14443a, kodwa ixhasa kuphela ikhadi elibonelelwa yiPhlips.

Uhlobo lwesithathu lweleyibhile ye-NFC enganyangekiyo ngentsimbi luhlobo lobuchwepheshe be-fecila obunikezelwa yiSony kuphela.

Ithegi yesine ye-NFC anti metal ineprotokholi ye-14443A/B. Olu hlobo lwethegi lulwethegi ekrelekrele, lufumana imiyalelo yeyunithi yedatha yeprotokholi yesicelo (i-APDU), lunendawo enkulu yokugcina, lunokugqiba i-algorithm ethile yokuqinisekisa okanye yokhuseleko, kwaye lunokusetyenziselwa ukwenza ukusebenzisana okukrelekrele kunye nokusebenza okunxulumeneyo kwelebhile ye-interface ephindwe kabini. Olu hlobo lwelebhile luneentlobo ngeentlobo zezicelo kwaye lunokuziqhelanisa nophando oluqhubekayo kunye nophuhliso kwixesha elizayo.