Abstract: Multilayer sliding bearing, of the type comprising: an intermediate layer (20) made of a material with a certain hardness, disposed on a backing layer (10); a sliding layer (30) made of a less hard material, said intermediate layer (20) presenting a radially internal face defined by at least a pair of surfaces, which are excentric to the bearing and which intercept each other along a respective intersection line (22) of the bearing that is inclined relative the opposite end edges, in order to reduce the thickness of said intermediate layer (20), the radially internal face of the sliding layer (30) presenting a curvature radius at maximum equal to the distance between the axis of the bearing and each point of each intersection line (22).

Abstract: A method of making a plain bearing sliding layer for use in internal combustion engines, comprising the immersion of a metal substrate in a chemical solution containing copper, tin and lead salts to which is added one of the compounds represented by the following three exemplary structures: ##STR1## where X is one of the chemical elements selected from sulphur and nitrogen, --C represents one carbon atom, and radicals R.sub.1 and R.sub.2 represent the allowed variations, from a single hydrogen atom up to the typical structures of inorganic compounds or aliphatic, aromatic or cyclic chain organic radicals. The chemical solution is subjected to an electric current with a density and potential controlled as a function of time, thereby effecting the selective electrodeposition of the solution elements on the substrate so as to form successive and alternate layers of softer material and harder material.

Abstract: A multilayer plain bearing composed of a backing layer, an intermediate layer and a diffusion or bonding layer, and a sliding layer, the sliding layer being of a laminate structure formed by the alternate deposition of layers of a softer material and layers of a harder material.