Method of producing a transistor

Method of producing a transistor, comprising at least the steps of:

• a) producing a stack comprising at least one substrate based on at least one semiconductor, on which there are disposed a dielectric layer, a gate layer and a layer of first mask,
• b) producing a first etching mask from the layer of first mask, one edge of the first etching mask forming a pattern of a first edge of a gate of the transistor to be produced,
• c) etching at least a first part of the gate layer not covered by the first etching mask, forming the first edge of the gate,
• d) first ion implantation in a first part of the substrate not covered by the gate layer,
• e) trimming said edge of the first etching mask over a length substantially equal to a gate length of the transistor, revealing a second part of the gate layer,
• f) producing a second etching mask at least on the second part of the gate layer and on a part of the dielectric layer not covered by the gate layer,
• g) removing the first etching mask,
• h) etching a third part of the gate layer not covered by the second etching mask, forming a second edge of the gate, the remaining part of the gate layer forming the gate,
• i) second ion implantation in a second part of the substrate not covered by the gate and/or by the second etching mask,
• j) removal of the second etching mask.