Abstract: It consists of a microcomponent comprising a cavity (13) delimited by a cap (12) enclosing an active part (10) supported by a substrate (11) The cap (13) comprises a top wall (12a) comprising stiffening means with at least one projecting stiffening member (12b) said stiffening member (12b) being located between two recessed areas (12c) of the top wall (12a) and having one end (14) at a distance from the recessed areas (12c) without coming into contact with the substrate (11).