QBoard-II is a modular, PCB-based sample holder system for low-temperature spin-qubit chips, general transport experiments, and superconducting circuits. Save valuable research hours by leveraging the power of a universal sample holder. QBoard-II supports any experiment from simple fast turnaround sample characterization to complex microwave-powered experiments.

Modular Design

Improving upon the performance and usability of the original QBoard, QBoard-II features more compact dimensions; new PCB, interposer, and daughterboard designs; and the addition of a shielding lid. A versatile set of mounting brackets ensures full compatibility with popular dilution refrigerators. Easily upgrade from QBoard-I with unchanged connector configurations.

Enhanced Experiment Capabilities

Conduct a wide range of experiments with improved signal integrity and reduced noise. The upgraded design with 16 high-density RF and 48 low-frequency RC lines enables transmission from DC to 8 GHz. A new PCB design minimizes losses and crosstalk. This is useful for applications such as readout of superconducting resonators, sub-nanosecond gate-voltage pulses, and high-bandwidth frequency sweeps.

Easily Exchangeable Sample Boards

The quantum chip is mounted and wire bonded to a daughterboard (6×6 mm, 10×10 mm, and 11×14 mm options). The daughterboard has a 0.5 mm deep gold-plated cavity into which the sample chip can be glued. Two independent four-frequency multiplexed tank circuits for RF readout measurements further enhance the capabilities of the sample holder.

Optimal Signal Quality

The chip carrier minimizes RF losses and reduces crosstalk, ensuring the quality of your measurements and experiments. Offering radiation protection for both the quantum chip and electrical components, QBoard-II comes with a new shielding lid. The lid fully encloses the sample for proper radiation protection and shields the RC filter components for the lowest noise environment.

Key Features

  • Plug-and-play chip carrier for quantum processors with up to eight spin qubits
  • Minimal crosstalk and RF loss up to 8 GHz
  • Small size – fits in 60 mm sample spaces, both horizontal and vertical
  • Easy exchange and re-use of different chips
  • Optimized thermalization path to the sample
  • Supports mounting multiple units in parallel or perpendicular
  • Increased number and types of experiments possible
  • All materials are non-magnetic

Proven Track

QBoard solutions have been successfully adopted by more than 80 research groups, startups, and established companies.

Scalable Spin
Qubit QPU

16 RF transmission lines with a bandwidth of up to 8 GHz and 48 low-frequency lines, make QBoard-II an ideal interface to operate qubit quantum processors with up to eight spin qubits.

Enables Cutting Edge Experiments

Offering a seamless solution for cutting edge experiments with compact dimensions to fit both parallel and perpendicular mounting – a key feature for investigating hybrid nanodevices in magnetic fields.

Focus on Your Core Research

Don’t spend valuable research hours designing and manufacturing your own chip carrier. With QBoard-II, focus on the qubit chip itself and conduct repeatable experiments.

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