Method for producing a superconducting transistor

A method for producing a superconducting transistor, comprising at least the steps of:

• producing a dummy gate on a first part of a semiconducting layer;
• producing superconducting electrodes such that the first part of the semiconducting layer comprises side edges arranged against parts of the superconducting electrodes, the step of producing superconducting electrodes comprising at least a deposition of a first superconducting material layer having first parts arranged against side edges of the dummy gate and second parts forming the superconducting electrodes or being parts of the superconducting electrodes;
• producing lateral spacers next to the first parts of the first superconducting material layer and on the second parts of the first superconducting material layer;
• removing the dummy gate and the first parts of the first superconducting material layer, creating a gate location arranged between the lateral spacers and above the first part of the semiconducting layer and above said parts of the superconducting electrodes;
• producing a gate in the gate location.