A memory cell cell) includes a plurality of back-gated n-type field effect transistors, and a plurality of double-gated p-type field effect transistors operatively coupled to the plurality of nFETs. Projections configured, for example, as bulging formations, are arranged on an underside of a support for the tappet push rod. The gasket preferably includes at least one support arm, which holds the antenna toward the middle of the housing, so as to minimize interference from the metal housing. The camera is mounted to the camera support section. The objective lens realizes an NA of 0.