Abstract: A vertical Hall sensor which is integrated in a semiconductor chip has at least 6 electric contacts which are arranged along a straight line on the surface of the semiconductor chip. The electric contacts are wired according to a predetermined rule, namely such that when the contacts are numbered through continuously and repeatedly with the numerals 1, 2, 3 and 4 starting from one of the two outermost contacts, the contacts to which the same numeral is assigned are electrically connected with each other.

Abstract: A cost-reduced, downsized automatic opening/closing apparatus for vehicle is achieved by reducing the number of components thereof. A case of a driving unit is provided with a drum housing portion, and a driving drum is rotatably accommodated in the drum housing portion. An electric motor is attached to the case, and the driving drum is driven for rotation by the electric motor. A cable connected to a sliding door is wound around the driving drum. By rotation of the driving drum, the sliding door is opened and closed as being drawn by the cable. The case is provided with a substrate housing portion integrally with the drum housing portion, and a control substrate for controlling an operation of the electric motor is accommodated in the substrate housing portion.