A method of forming a high aspect ratio adhesive structure, the method comprising fabricating a porous template comprising at least a first tier and a second tier; introducing a softened polymer into the template; and separating the polymer from the template. Tensioning rods extend upwardly from each footing for directly engaging an end of the wall or for securing a post to the footing, which post includes a slot for engaging the vertical edge of the wall. One embodiment of the present invention includes a method of making a semiconductor device, the method comprising providing a substrate; forming a plurality of polishing stops on the substrate; growing one or more buffer layers on the substrate; growing one or more epitaxial layers on the one or more buffer layers; and applying one or more metal layers to the one or more epitaxial layers. The backlight unit 12 is a lighting unit configured to illuminate the liquid crystal panel 11. A digital signal input device receives the comparison result signal from the comparator. The system includes receiving a lock request for access to data in the database system, in which the lock request is a request for a page lock or a row lock for a corresponding row or page in the database system containing the data.