According to one embodiment, a pattern formation method includes forming a layer above an underlying layer. These foam stabilizers are preferably obtained from hops, which is a constituent that is inherent in beer and accordingly offers the advantage, among others, that the foam stabilizers need to have no negative effect on the taste of the beer. The reverse grain projections are formed so as to be adjacent to each other in the axial direction of the straight grain projections and are also formed in the circumferential direction. One of adjacent sourcedrain regions in the upper surface of the semiconductor substrate is electrically connected to the copper interconnection, while the other is electrically connected to the capacitor. In this case, the silica formed by oxidizing the thinned portion of the silicon substrate can be used, for example, as a window to provide optical access through the silicon substrate. The server can then register for ownership of the event tracking data communication by modifying the master ownership table if the event tracking data communication does not have an owner or enough owners.