sureCore to license 22FDX CryoMem IP for quantum computing

sureCore in Sheffield is licensing its CryoMem suite of Memory IP designed for extremely low temperatures required for quantum computing (QC) applications.

The IP is the result of a UK-funded consortium that developed cryo-tolerant semiconductor IP and will be available on 180nm and 22nm 22FDX silicon on insulator (SOI).

The foundation IP will help develop custom Cryo-CMOS system on chip designs for quantum computing. This enables the migration of the control electronics into the cryostat to be close to the qubits.

The embedded Static Random Access Memory (SRAM), Register Files & Contact Programmable ROM, all key building blocks for any digital sub-system, that is capable of operating from 77K (-196°C) down to the near absolute zero temperatures needed by quantum computers. Both standard cell and IO cell libraries have been re-characterised for operation at cryogenic temperatures thereby enabling an industry standard RTL to GDSII physical design flow to be readily adopted.

The next step will be characterising the demonstrator chip at cryo temperatures to further refine and validate the models to help improve the performance.

• SureCore expands into cryo control logic for quantum computing
• Low power CryoMem to cut power use
• Spectre calibrates Spice models for CryoMem

“We have successfully tested 180nm sample chips at 77K so we can now start licencing this IP and we are also in the middle of evaluating 22FDX demonstrator IP and the plan is to make these available for licencing shortly,” said Paul Wells, CEO of sureCore.

“Every potential customer who is interested in licensing IP always wants to know if it is silicon proven and can they have an evaluation report. It’s great to be able to say yes, and, not only that, but we can also provide you with a full evaluation board,” he added.

“We have just closed a funding round, part of which will enable us to develop this rapidly growing sector of our business. Our success with proven Cryo-CMOS is really going to help accelerate the growth of the QC community by unleashing the power of the fabless business model. The availability of this key enabling Cryo IP which, to date, has been the preserve of the Tier-1 players, will help level the playing field for start-ups struggling to commercialise their novel qubit technologies.”

A key barrier to QC scaling is being able to collocate ever increasingly complex control electronics close to the qubits that must be housed at cryogenic temperatures in the cryostat. In doing so, it is essential that the control chip power consumption is kept as low as possible to ensure that excess heat is kept to a minimum so it does not cause additional thermal load on the cryostat.

Current QC designs have the control electronics located outside the cryostat as modern semiconductor technology is only qualified to work down to -40°C. As the temperature is reduced close to absolute zero the operating characteristics of the transistors change markedly. Measuring, understanding and modelling this behavioural change over the past months showcases the potential to build interface chips that can control and monitor qubits at cryogenic temperatures.

SureCore sees quantum computing companies creating their own custom cryogenic control SoCs, which can be housed with the qubits inside the cryostat.