Graphene for Hall sensing
| Reference number | |
| Coordinator | Graphensic AB |
| Funding from Vinnova | SEK 244 000 |
| Project duration | December 2017 - July 2018 |
| Status | Completed |
| Venture | Strategic innovation program SIO Grafen |
Purpose and goal
In relation to the first goal of the project (demonstrating Hall sensors with sensitivity of at least Sv = 100 mV/VT, at room temp.), we’ve managed to accomplish the target with margin. However, stability in sensor performance is poor using prior developed techniques. In relation to the second goal of the project (demonstrating performance in harsh conditions, such as temperature up to T = 175°C), performance irreversibly tend to degrade at around T = 125°C. Thus, the purpose of the project (to explore performance and limits of Hall sensors based on epitaxial graphene) was fulfilled.
Expected results and effects
Though we’ve managed to outperform state of the art commercial Hall sensors in terms of voltage related sensitivity, the project concluded that in order to fulfill the performance requirements of the automotive industry, novel techniques need to be developed to ensure sensor stability and temperature resilience.
Planned approach and implementation
The actors in the project have formed a complementary supply chain where TDK-Micronas mainly have contributed with specific requirements based on industry needs, and intricate characterization of Hall sensors. Chalmers have been designing and processing devices, based on discussions with all project actors. Graphensic have coordinated the efforts and grown graphene material to meet the demands of Chalmers.