Superconducting Materials

Chip Synthesis

This page explains the material families that a superconducting quantum-chip design flow must describe before layout, fabrication, HFSS simulation, Q3D extraction, and EPR/scQubits analysis.

Learning goal

Superconducting quantum circuits require carefully selected materials across three

functional layers: Each slide covers one material: Role · Properties · Critical Temperature · Importance for qubit coherence
Superconducting Metals
Aluminum (Al), Niobium (Nb), Molybdenum Rhenium (MoRe), and Indium (In). These materials form qubit electrodes, resonators, wiring, and flip-chip interconnects.
Superconducting Compounds
Titanium Nitride (TiN), Niobium Nitride (NbN), and Niobium Titanium Nitride (NbTiN). These support high kinetic inductance, photon detection, high-Q microwave circuits, and magnetic-field-tolerant designs.
Substrates and Barriers
Silicon (Si), Sapphire (Al2O3), and Aluminum Oxide (AlOx). These define the chip foundation and the Josephson junction tunnel barrier that creates qubit nonlinearity.