A spearhead assembly comprises a base having an outer surface, a slot, a spear point and a guard. A semiconductor mounting bonding wire has a breaking elongation of 7 to 20%, and stress at 1% elongation is greater than or equal to 90% of a tensile strength and is less than or equal to 100% thereof. The logic values are fixed when a first condition is reached, which is based on the frequency of the oscillator signal, a division factor, and an input reference signal frequency. After activation, however, the disk becomes readable by conventional optical media players.