A method of manufacturing a semiconductor device may involve providing a first insulation pattern on a substrate including first and second regions. The search and recommendation system operates in the context of a content pointer manager, which stores individual users’ content pointers on a centralized content pointer database connected to the Internet. Arrival of reserve and refresh requests during the selected cell is detected to generate an rfcount associated with the selected cell. A hydraulic cylinder coupled to the forward bar and to one of the pivoting arms raises the associated aft bar with row units above the soil to a first elevated position to facilitate turning the planter. The second insulating film is formed to fill the concave portions and a portion between the first and second gate electrodes has a multi-layered structure containing at least the first and second insulating films. The marginal region includes an end region in which the base element has a substantially constant thickness and the layer of foam is absent, and a coupling region at a distance from the edge of the base element and the edge of the skin and in which the base element has a thickness smaller than the thickness in the end region.