Patent ID: 8524520

Claim:
A method for producing a structure on a substrate successively comprising: depositing a second sacrificial material; depositing a first sacrificial material on the second sacrificial material, the first sacrificial material being different from the second sacrificial material; after depositing the second and first sacrificial materials, patterning the first sacrificial material to form a first pad of first sacrificial material and then etching the second sacrificial material to form a second pad of second sacrificial material, so that the first pad of first sacrificial material is arranged on the second pad of second sacrificial material, a design of the first pad being defined smaller than a design of the second pad so as to leave an annular area free on a top surface of the second pad around the first pad; depositing an active layer made of a first material on the substrate, on a top surface of the first pad, on the annular area and on side walls of the first pad so as to form a closed cover around the first pad made by the active layer and the second pad over the substrate; forming an opening in the active layer to access the first pad; removing the first pad selectively versus the second pad material via the opening so as to release a free area of the active layer, the free area being secured to the substrate by a securing area made of the active layer; and removing the second pad via the opening after the first pad has been removed.