There is disclosed a method for inspecting a defect in a photomask which is produced by using a graphic data, that matches mask data or is produced by subjecting mask data to correction of a process conversion difference relating to at least a line width. The video game device 200 includes a password storage means for receiving the authentication information and the password from the data delivery server 100 and saving the password. An active region including one or more quantum wells is formed over the lower mirror. The isochoric thermal isolation zone protects sealing rings seated in the sealing portion from extremely cold compressed gas being introduced into the compressed-gas system.