According to one exemplary embodiment, a heterojunction bipolar transistor includes a base situated on a substrate. The hat may include a cavity with an opening configured to receive a head of a user. The guard main body includes a guard main body upper portion, and a guard main body lower portion configured to be detachable from the guard main body upper portion. A light source irradiates the first site to thereby induce a photoelectrochemical effect at an interface thereof. The method also includes the step of forming terminal contacts on the interconnect contacts, or alternately forming conductors in electrical communication with the interconnect contacts and then forming terminal contacts in electrical communication with the conductors. A method of splicing shielded wire cables together is also presented.