Correct. There is no "FD linked card" concept in HDFC bank.I think what @guest_999 mentioned and you both same. Basically infinia is not the card linked to FD, in other words its not secured card. Of-course you got infinia after creating FD of 10L, so your branch manager/some one raise a special request to CC division to issue a infinia card. Usually secured/FD linked card will be valid till FD is active.
@webgupta