A method of fabricating a micro-electrical-mechanical system (MEMS) apparatus on a substrate (10) comprises the steps of processing the substrate (10) so as to fabricate an electronic circuit (11); depositing a first electrode (15) that is operably coupled with the electronic circuit (11); depositing a membrane (16) so that it is mechanically coupled to the first electrode (15); applying a sacrificial layer (50); depositing a structural layer (18) and a second electrode (17) that is operably coupled with the electronic circuit (11) so that the sacrificial layer (50) is disposed between the membrane (16) and the structural layer (18) so as to form a preliminary structure; singulating the substrate (10); and removing the sacrificial layer (50) so as to form a MEMS structure, in which the step of singulating the substrate (10) is carried out before the step of removing the sacrificial layer (50).