Patent ID: 8252638

Claim:
A method for forming a gate-all-around transistor, the method comprising: forming a single-crystal silicon bridge running above an active area of a semiconductor substrate, the bridge being laid on an insulation area surrounding the active area; forming a thin silicon oxide layer around the bridge and on the active area; depositing a photosensitive layer to cover the bridge and the insulation area surrounding the active area, and into an empty space located between the active area and the bridge; simultaneously insolating, through the silicon bridge and the thin silicon oxide layer, first and second portions of the photosensitive layer, the first portion positioned above a central portion of the bridge and the second portion positioned below the central portion of the bridge; removing the first and second portions of the photosensitive layer; filling spaces previously occupied by the said first and second portions of the photosensitive layer with a conductive material to form a gate; and removing the remaining portions of the photosensitive layer.