A method for controlling a masking block in a monitoring camera. The method involves the epoxy impregnation and encapsulation of the components within the piezoelectric stack assembly. A male buckle member is attached on the front part of the detachable battery strap to be fastened with the female buckle member and includes a plurality of pogo pin connectors for connecting with the metal conducting points, and a locking block for fastening with the receiving chamber. Each connection structure is compatible with only one of the receiving structures such that when the connection structures are attached to the roll, the film can be loaded in only one direction, i. The conductive layer is then chemically mechanically planarized to an endpoint of the isolation layer so that all of the conductive layer except material in the recess and on the gate oxide is removed.