A semiconductor device and a method for manufacturing the same are disclosed. A switching circuit generates a switching signal and an auxiliary signal. The elastic member is arranged so that when elastically deformed, almost the whole thereof is positioned within a range of a vertical dimension of the hydraulic buffer. The apparatus has a columnar shape with a circular cross-section, a triangular cross-section, a rectangular cross-section, a hexagonal cross-section, or an octagonal cross-section.