February 11, 2013
Moscow's metro MIFARE/RFID chip : Weekend die-shotSince February 2013 you can find Sitronics-Mikron's RFID chips inside Moscow's metro tickets, instead of NXP ones which were used before.
Mikron chip is 20% smaller. Die size 610x526 µm.
We've found functional difference - Mikron's chips are not readable by NFC readers in modern cell phones, but this might be a software issue.
Significant part of chip area is used by passive components: