pad
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Connects bonding wires to the die. Large metal pads so the wire can be attached without high precision. The inner box is the overglass covering part of the aluminium so as to be able to make a good contact and still maintain a good seal.
Still has a bond wire on it:
Damaged overglass: damaged_overglass.jpg It is very fragile and can easily get completely stripped during decapsulation.
Aluminium (M1) errosion from excessive time in acid bath:
pad.1340257238.txt.gz · Last modified: 2013/10/20 14:59 (external edit)