The invention provides a ceramic package, a ceramic package having such a sealing structure and a fabrication method of thereof. The lens array element is configured to electrically change the alignment of the liquid crystal molecules to generate a lens effect, and configured to selectively change a state of passing therethrough of the image light exiting from the display panel. A DA converter within a CPU monitors the input to the regulator, and an output voltage of the regulator stabilizes a reference voltage of the DA converter. An inner-rotor-type motor is mounted in the motor casing and includes a rotor and a stator. In a reflective mask blank for exposure having a multilayer reflective film formed on a board and adapted to reflect exposure light and an absorbent layer formed on the multilayer reflective film and adapted to absorb the exposure light, the shape of a surface of the mask blank on its side opposite to its transfer pattern forming surface is a shape having a convex surface.