NOVELTY - An conductive electrode substrate has innumerable concave and convex portions (C,C',D,D') which are arranged adjacent to each other. The walls of the convex and concave portions are contoured in thickness direction of the substrate and are tilted to a greater extent towards the edges of the concave and convex portions.    USE - Non-sintered type thin electrode for secondary battery (claimed) such as Ni/MH battery used in electric vehicles (EVs), hybrid electric vehicles (HEVs) and electric power assisted vehicles.    ADVANTAGE - Inexpensive, lightweight sealed cylindrical or prismatic Ni/MH battery that shows excellent characteristics of high rate charge/discharge and long life cycle is achieved. The bending of the walls of the concave and convex portions towards edges, prevents shedding of active material powders and enhances the current collection ability of entire electrode.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (i) non-sintered type thin electrode production method which involves rubbing the surface of a conductive electrode substrate by a brush, while coating active or pseudo active material on the electrode substrate. The electrode substrate is pressed between a pair of rollers to form convex and concave portions in the substrate, so that its thickness is 0.5-2.0 times larger than the thickness of final electrode. The electrode substrate is immersed in a liquid in which synthetic resin such as fluoride resin, polyolefin, polyvinyl-type and polysulfone resins are dispersed. The synthetic resin is coated thinly on the electrode substrate which is cut into desired size;    (ii) secondary battery which has thin electrode and opposite electrode with separator which are sealed in a battery case. The ratio of thickness (t2) of bottom of the battery case to thickness (t1) of the side walls is 1.5 or more. The positive terminal of an adjoining secondary battery is welded directly or through a metal connector to the bottom of the battery case.    DESCRIPTION OF DRAWING(S) - The figure shows the cross-sectional view of the thin electrode.    Concave and convex portions (C,C',D,D')