Abstract: A monolithic silicon Josephson junction can be fabricated from a silicon wafer using semiconductor technologies such as gas immersion laser doping and smart cut technology. Rather than using a superconducting metal for the junction electrodes, silicon that has been highly doped with boron can serve as the superconducting material for the electrodes of the Josephson junction. A region of the silicon wafer that has not been doped serves as the tunnel barrier. Fabrication of the Josephson junction does not require a metallization process since the electrodes and tunnel barrier are formed from highly doped silicon and non-doped silicon, respectively. The single-crystal structure of the resulting Josephson junction yields low two-level system (TLS) noise.

Abstract: The present invention provides a method to validate the identity of a user of a mobile computer, especially a laptop computer or a notebook computer, which comprises an integral pointing device. The method is characterized in that the integral pointing device of the mobile computer is used as signature input device to identify a signature of the user. The present invention further provides a new mobile computer, especially a laptop computer or a notebook computer, which comprises an integral pointing device being able to record the signature of a user sufficiently accurate to allow signature recognition and thus user identification. Preferably the integral pointing device is able to detect multiple pressure levels for dynamic signature recognition.