A hunting arrow having an arrow shaft with a front end and a back end. Accordingly, the insulation film can be etched at a high selective ratio, and the increase of dimensions of a pattern of the mask with respect to dimension of a pattern of the resist film used in the patterning can be suppressed. The aim of the invention is to improve said preparation in order to enable an improved photodynamic control. Once the unique identifying characteristics are located, they can be analyzed to determine which modulation type and rate are represented. If an outer reservoir is used the disinfectant is replenished or the reservoir is periodically replaced.