A dense ceramic electrolyte membrane supported by symmetrical porous ceramic electrolyte layers. In the CSP type semiconductor device, a light-shielding material, such as a silicone-based resin, an epoxy-based resin, or a metal, is deposited onto a side surface or a rear surface of a semiconductor chip where no circuit is formed. A communications interface connects the processor and a remote correspondent which is a source of current information. This operates a the pump to pump water to the steam generator for feeding steam to a steam pad mounted on a mop steam frame connected to the steam generator outlet. After detecting a processing error, the status of said readybusy line is changed back to said busy status if an processing error is detected. Aspects of the present invention relate to a source cell providing instructions to a user device instructing the user device to determine neighbor relation data, such as an internet protocol address, of a target cell.