i#ve looked at my micro sd cards. they have all a different circuit layout - but all of them have circuits in the area thats missing from your card.
i've tried to make a good picture of that circuits - but it's not possible with my magnifier (it#s just black in black) - but if you look on the backside, you can see the lines
i p'shopped a picture to show you the PCB (Printed Circuit Board) area on a micro sd card
[image|61013|size=thumbnail]