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// TECHNOLOGY

Scale your
quantum system. Not your cabling challenges.​

Cri/oFlex® superconducting cables replace conventional wiring inside cryostats, delivering higher channel density, lower thermal load, and proven reliability at scale. Built for quantum and cryogenic systems that demand more.

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// PLATFORM PILLARS

Three reasons to
rethink your cabling​

Density without compromise

Eight channels per flex, 0.3 mm thin.
Up to 256 channels per loader.
General properties

Integrated filtering components

Attenuators, low-pass and IR filters built in. 10× fewer points of failure.
Filtering components

Superconducting
NbTi flex 

10× lower thermal load, 50% lower microwave losses.
Cri/oFlex®

// GENERAL PROPERTIES

What makes Cri/oFlex® work

Specification table

Channels

8

Thickness

0.3 mm

Materials

Polyimide + Ag/NbTi

Line type

Stripline

Impendance

50 Ω

Frequency range

DC – 18 GHz

Bend radius

5 mm

// FILTERING COMPONENTS

What makes Cri/oFlex® work

Flex materials — Polyimide + Ag / NbTi

Best signal and thermal properties due to clever material choices

Our products consist of polyimide in combination with Silver (Ag) or Niobium Titanium (NbTi), creating a robust, low-loss flexible stripline for cryogenic environments. Microwave losses are 1.5 dB/m @6GHz for NbTi platform, while maintaining a contact resistance of less than 10 mOhm.

Improved signal-to-noise ratio through attenuation

The attenuator uses modeled attenuation profile distribution and a modular design based on –5 dB unit cells to achieve predictable performance. Its planar structure enables fast, localized heat extraction through clamping, ensuring effective thermal management and stable operation.

Filtering out of band frequencies to shield qubits from noise

The low-pass filters suppress unwanted high-frequency signals at the quantum device, helping to maintain a clean electromagnetic environment for sensitive measurements. Each filter is engineered with a defined cut-off frequency—commonly 1, 8, or 12 GHz—to match the requirements of different quantum systems.

Absorbing high frequency radiation to shield qubits from noise

IR filters block high-frequency radiation with a slope of -1 or -1.5 dB/ GHz to decrease quasi particle poisoning. The metal powder in side the dielectric, available for both the Ag and NbTi platforms, dissipates the signals.

// Lines

Engineered for every
function in your I/O chain​

Flux Bias Lines

Flux Bias lines are essential for controlling superconducting qubits and tuneable couplers, where they are used to precisely tune the qubit’s frequency or manage coupling between qubits. These lines are engineered for bias signals up to 1 GHz, with a focus on minimizing both active and passive heating across all cryogenic stages.
  • Only available NbTi flex in the world
  • Integrated attenuators, low-pass filters and IR filters
  • Soon, adding the novel superconducting 2 GHz low-pass filter

Microwave Drive Lines

Microwave Drive lines are used for exciting transitions between qubit states and for performing qubit-state-dependent measurements. They are engineered for high signal fidelity in the 6-8 GHz operating range, where qubits control and readout protocols demand precise amplitude, phase stability, and low noise.
  • Optimized attenuation profile distributed across your cryostat's thermal stages
  • Deliver performance equivalent to or exceeding standard coaxial solutions
  • Improved equal level far end crosstalk isolation

Signal Lines

Signal lines serve as a versatile building block for cryogenic, high-frequency I/O and are used across a wide range of applications where many channels must be routed into cold and space-constrained environments. Designed for simplicity, these lines do not include integrated components, making them easy to deploy and compatible with a broad variety of setups.
  • Available in both Silver (Ag) and superconducting (NbTi) variants
  • Multiple cable length options to offer routing freedom for cramped cryostat interiors
  • Compatible with a broad variety of setups

Read-out Lines

Read-out systems transfer signals from the quantum device back to the control electronics, placing stringent demands on signal integrity, noise performance, and often requires low-temperature amplification. We offer a fully integrated solution by combining our in-house produced return and Pump lines with carefully selected third-party active and isolating components.
  • Each chain is assembled and tested according to your required gain, bandwidth, and noise profiles
  • Plug-and-play read-out architecture
  • Ensures optimal performance from the device to room temperature

// APPLICATIONS

Built for advanced
technologies

Super conducting
qubits

High-density, validated standard configurations.

Semiconductor
spin qubits

Scalable bus-like I/O, picosecond phase matching.

Photonics / SNSPDs


Small form factor, sub-nanosecond pulse accuracy.

Astrophysics

(MKIDs, TES) 

Small form factor, sub-nanosecond pulse accuracy.

Go deeper

Full specs, transmission data and crosstalk in our brochure.

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