A transistor power switch device comprising a semiconductor body presenting opposite first and second faces, an array of vertical field-effect transistor elements for carrying current between the first and second faces is provided. Following the formation of spacers, and in some embodiments replacing a dummy gate with a final gate structure, oxygen is introduced to a gate dielectric through a diffusion process, using the deposited dielectric layer as a diffusion pathway. When the bladder is in a mounted but uninflated mode, the shoulder portions of the bladder have a radius of curvature R1 significantly less than a radius of curvature Rc of the central portion. This deadline approaching alert time is a time at which a help desk user must be notified that the deadline for resolving the problem must be met is approaching. The plurality of storage locations may be, for example, on a disc surface, or on multiple disc surfaces. The vanes can be rotated between an open position, in which the edges of adjacent vanes are spaced apart and a closed position, in which the edges of adjacent vanes abut each other to for:: a substantially continuous surface.