An oil control valve includes an operation unit at an upper part of a cam cap and an inner part of a head cover that changes a path of fluid into a continuously variable valve timing unit, and a connector that supplies power to the operation unit. Further disclosed is a device for producing hydrogen. A first EGR passage communicates the EGR inlet port with the first EGR valve chamber. On the other hand, the second translucent electrodes 4 aligned in the direction orthogonal to the surface of a sheet are connected to each other by connecting portions 5 which are formed by patterning so as to be integrated with the second translucent electrodes 4. Exposed portions of the cured polyimide precursor material are removed for exposing portions of the pole tip layer. The gate electrode is configured to control a conductivity of an active channel part of the layer of inorganic semiconductor.