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BOARD – ADVANCED SAMPLE HOLDER SYSTEM

THE QBOARD – SAMPLE HOLDER FOR LOW-TEMPERATURE ELECTRONIC DEVICES WITH PROVEN DESIGN

QBoard is a modular, PCB-based cryogenic sample holder system for low-temperature electronic devices, such as spin-qubit chips and superconducting circuits. It has 48 DC/low-frequency channels and 16 high-frequency channels (GHz) and offers excel­lent thermalization down to millikelvin.

QBoard is based on a multi-board design for multiqubit devices1) which is used for example at the University of Sydney and the University of Copenhagen (Center for Quantum Devices). It consists of a motherboard, a daughterboard (which serves as a chip carrier), an interposer, a mounting bracket, plus all necessary cables for connecting the QBoard to the cold finger of a typical dilution refrigerator (or to the inside of cryostat’s measurement insert).

With this optimized, tested and well-documented system you do not need to spend valuable research hours on designing and manufacturing chip carriers and connectors for contacting your quantum chip.

QBoard with a mounted daughterboard. The 51 pin nano-D connectors are seen on the top side. The 16 mini-coax connectors are located in two rows on the bottom side.

THE MAIN FEATURES OF THE QBOARD SAMPLE HOLDER

• Motherboard with two 51-pin nano-D connectors wired in parallel, facilitating sample check-in bot­tom-loader cryostats or grounding during connection.

• Made of non-magnetic materials.

• Daughterboards for sample mounting via wire bond­ing. Daughterboards are inexpensive – no more need to unbound good samples!

• Daughterboards are prepared for mounting of resona­tor circuits for reflectometry.

• 48 RC-filtered low-frequency lines.

• 16 RF lines with two 8-pin mini-coax connectors.

• 16 bias tees on motherboard for all RF lines.

• Mounting bracket for inserts of popular dilution refrig­erators. QDevil supplies CAD files for customers who need to make their own brackets.

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QDevil QBOARD – ADVANCED SAMPLE HOLDER SYSTEM.pdf