Capacitor structures and capacitors with edge zones that are substantially free of hemispherical grain silicon along the upper edges of the capacitor structures are disclosed. When the first optimum recording power is determined to be not adequate, a recording power obtaining mechanism obtains the updated first optimum recording power. A source metal plate and a gate metal plate are attached on source metal layer and gate metal layer respectively. The first pipe has valves arranged therein at positions nearer to and farther from the source container, respectively. The memory serves to allow all or part of the previous location data to be stored for transmittal to an interrogator at a later date.