A mandrel for transporting a set of substrates includes a rod having a free end and a fixed end, the fixed end configured to be coupled to a transport mechanism. The wafer is fabricating by forming a substantially uniform thermal oxide on a surface of a Si-containing layer of a SOI substrate which includes a buried oxide region positioned between the Si-containing layer and a Si-containing substrate layer. The CPU supplies a control signal corresponding to the control command to an interface section. An inner edge may define an end of a side of each of the plurality of blades, the inner edge extending toward a rotational shaft of the plurality of blades, and an outer edge may define an end opposite to the inner edge. The thin film is selectively etched in accordance with said crystallization rate. A method for dispersing a taggant includes: launching a grenade containing a taggant over a target, the taggant being invisible in the spectrum of the human eye; and covertly dispensing the taggant over the target.