An F-RAM authenticating memory device and method providing secure mutual authentication between a Host system and a memory in order to gain readwrite access to the F-RAM user memory contents. In one embodiment, a combination of integer phase generators are employed to produce phase control signals during an overall cycle having N phases, wherein the overall cycle is a combination of primary cycles having D phases and an adjustment cycle having R phases, wherein R is the remainder of ND. The coupling portion is preferably more crush-resistant than the body portion. A saw carriage is mounted on the saw arm for reciprocal movement toward and away from a saw arm hinge axis. Through this method and its use, in particular silicon based solar cells, can be provided with a back contact in a simple manner in a continuous process sequence, wherein the process sequence can be provided particularly efficient and economical, since no handling systems for rotating the substrate are required, and in particular silk screening steps can be dispensed with.