IC tag whose function can be changed upon separation

An integrated circuit (IC) tag comprising

• a number n of separable portions Ak from A1 to An, wherein n is a natural number such that n≧1 and k is a natural number such that 1≦k≦n, and
• a non-separable portion An+1 in addition to the separable portions A1 to An,
• a number n of signal lines Lk from L1 to Ln, wherein each signal line Lk electrically connects the ICk and the ICn+1 such that an electric signal connection is severed upon separation of separable portion Ak from portion An+1, the portion An+1 having an Ak separation detection unit,
• and wherein each time a separable portion Ak is separated from portion An+1 sequentially in the order of k=1 to n, the separation of the portion Ak is detected and a function of the tag changes from a k-th function to a k+1-th function such that the function of the IC tag changes sequentially from a first function when none of portions A1 to An are separated from portion An+1 to a n+1-th function when all of portions A1 to An are separated from portion An+1.

An integrated circuit (IC) tag comprising

• a number n of separable portions Ak from A1 to An, wherein n is a natural number such that n≧1 and k is a natural number such that 1≦k≦n, and
• a non-separable portion An+1 other than the separable portions A1 to An,
• wherein each separable portion Ak includes an integrated circuit ICk and the non-separable portion An+1 includes an integrated circuit ICn+1, the IC tag further comprising:
• a number n of signal lines Lk from L1 to Ln, wherein each signal line Lk electrically connects the ICk and the ICn+1 such that an electric signal connection is severed upon separation of the portion Ak from portion An+1, the portion An+1 comprising an Ak separation detection unit, and
• wherein the function of the tag is changed depending on which of the portions A1 to An are separated from the tag.