- IGZO transistors allow flexible electronics without the need for complex packaging.
- Flex-RV prototype operates even when rolled up, but performance remains modest.
- Flex-RV is ideal for low-power applications like health wearables and soft robotics.
Indium gallium zinc oxide (IGZO) is a game-changing material that is set to replace traditional silicon in chip manufacturing. Unlike brittle silicon, which requires intricate packaging to handle physical stress, IGZO transistors can be printed onto flexible plastic substrates at low temperatures. This shift significantly simplifies the production process and opens the door for new, flexible electronic applications.
Pragmatic has showcased its Flex-RV prototype, a flexible circuit that can be rolled around objects like a straw and continue functioning. While the demonstration revealed that the board needs careful handling, watching it flex and compute without a hitch is an impressive technological achievement. However, the performance is modest, with a clock speed of 60 kHz, making it unsuitable for high-performance tasks like training advanced AI models.
The Flex-RV’s strength lies in its ultra-efficient design, consuming less than 6 mW of power. Pragmatic never intended this chip for heavy computing but rather for innovative applications like disposable medical devices, wearable health trackers, soft robotics, and brain-computer interfaces. The company has cleverly avoided expensive chip architecture licensing by using the open-source RISC-V instruction set, keeping costs low.
Additionally, the processor has shown remarkable resilience in testing, maintaining performance even when bent to a radius as tight as 5 mm. While throughput did dip slightly, the chip still handled flexing far better than previous bendable processors, which required resting on flat wafers for testing. This demonstrates a significant leap in the development of flexible electronics, pushing the boundaries of what’s possible.
The recent advancements aren’t just limited to this single prototype. Earlier efforts, such as a flexible version of the Arduino Uno called “Flexduino,” laid the groundwork for bendable circuits. However, the Flex-RV takes the concept further by integrating flexible logic gates directly into the circuitry, setting a new benchmark for flexible computing.
