Lithium micro-battery comprising an electronically conducting encapsulating layer

The microbattery has a packaging thin layer (16) formed from a matrix of polymer material i.e. aromatic polyepoxide, in which metallic particles are dispersed, where the polymer material is obtained from a photopolymerizable precursor material. The packaging thin layer constitutes a part of an anodic current collector of the microbattery. Each metallic particle has mean diameter that ranges between 1 micrometer and 15 micrometer. The packaging thin layer has thickness ranging between 2 micrometer and 15 micrometer.