Exploring Adaptive Body Biasing with Racyics ABX at 6K
August 10, 2023 −
Ever wondered how GlobalFoundries 22FDX technology behaves at -267 °C / 6 K? ❄️
As part of the QSolid project, a collaboration of 35 partners led by Forschungszentrum Jülich, we at Racyics always ensure the functionality at extreme cryogenic temperatures of each of the upcoming testchips, despite the fact that our #ABX Standard cell library is characterized only down to -40°C.
In collaboration with Zentralinstitut für Engineering, Elektronik und Analytik – Systeme der Elektronik (ZEA-2) at Forschungszentrum Jülich, we conducted precise measurements on our previous #AMCHAR test chip across a temperature range from room temperature down to 6K. These measurements provided detailed insights into the behavior of our standard cells. We particularly focused on exploring the impact of varying back-gate voltage, revealed promising potential for our #ABX Adaptive Body Bias Generator in cryogenic scenarios!
In the first image, you can see a measurement setup used for the test chip at the ZEA-2, in which the Device-Under-Test is mounted on a cryostat from attocube systems AG. In the second image, the gate delay of a ring oscillator is presented from 6K all the way up to 300K for different back bias voltages.
The valuable knowledge derived from these findings forms a solid foundation for the progress of our upcoming QSolid test chips. With these, we can even further explore and analyze the behavior of GF’s 22FDX technology at temperature below 6K.
Our profound thanks go to BMBF – Grant No. 13N16165, whose support has been crucial in facilitating the implementation of this groundbreaking project!
