Patent ID: 7683496

Claim:
A misalignment detection device comprising: a substrate comprising a first positioning pad and a second positioning pad adjacent to the first positioning pad; at least one integrated circuit (IC), disposed on the substrate, comprising a first positioning bump and a second positioning bump adjacent to the first positioning bump, wherein the first positioning bump is electrically separated from the second positioning bump, the first positioning bump and the second positioning bump substantially correspond to the first positioning pad and the second positioning pad, respectively; and at least one detection unit electrically coupled to the substrate, wherein the at least one detection unit outputs a fault signal in response to a positioning shift occurring between the first and second positioning pads and the first and second positioning bumps; wherein the first positioning pad comprises a first rectangular portion and a second rectangular portion whose area is smaller than the area of the first rectangular portion, and the second positioning pad comprises a third rectangular portion and a fourth rectangular portion whose area is smaller than the third rectangular portion; and wherein the second rectangular portion and the fourth rectangular portion are disposed between the first rectangular portion and the third rectangular portion.