A charge detector includes an outer housing having an entrance aperture. The invention further refers to dynamic logic cascade circuits comprising such a dynamic logic gate. A metal layer including first TiTiN layer, an Al layer, and a second TiTiN layer is formed on an entire surface of the semiconductor substrate. The mass ratio of acid-modified styrene-based elastomer to the sum of acid-modified styrene-based elastomer, and unmodified styrene-based elastomer ) may be from 0. A rear landing pad is provided that supports and secures the transfer board in the vertical position at the side of the wheelchair.