Disclosed are methods and resulting structures which provide an opening for epitaxial growth, the opening having an associated projection for reducing the size of the contact area on a substrate at which growth begins. The method further comprises the following steps:identifying wavelengths that are usable along each of the route segments; andconstructing a graph in which the vertices are the wavelengths usable in the route segments and the arcs joining each of two consecutive vertices are the transitions between the wavelengths represented respectively by said consecutive vertices. When an identifier extracted from the received data coincides with an identifier from the portable device, the information processing device stores record data corresponding to the identifier together with the identifier. The housing latch can releasably interfere with the upper housing when the upper housing is in the pre-use position so as to prevent the upper housing from moving toward the dispensed position, and the movement of the needle guard toward the second position, causes the interference to be removed, thereby allowing the upper housing to move toward the second position. This method allows users to participate in multiple reward or incentive programs without carrying with them, multiple individual source identifiers connected to each of said reward or incentive programs. The information is recorded on the recording medium in the form of length and interval of a mark portion.