A packer includes one or more anchors for securing the packer in a wellbore and a pair of seal elements that form a fluid seal. Recording heads include a substrate layer made of a first material. Subsequently, polymer melt is injected into the depressed zone and, during the injection of polymer into the depressed zone, the mold plates are moved apart. Each of the elongate members are connected to the bridge member at an approximate intersection of a respective two of the sides, such that each elongate member is subject to a force from each of two intersecting sides, and moves toward the open center portion of the bridge member when the shape memory effect material changes from the second state to the first state.