The goal of this PhD is to elaborate new classes of logic for flexible integrated circuits. The technology that we will use are transistors that are processed on flexible plastic substrates. They are based on amorphous oxide semiconductors, kin to the transistors used in the backplanes of AMOLED televisions, but processed on plastic. Our goal is to use them to make flexible integrated circuits with large integration densities, from LSI to VLSI. These flexible circuits can be integrated in/on everyday objects and will find applications in IoT and wearable patches that measure body functions.
The semiconductor has a charge carrier mobility of about 20 cm2/Vs, and can only carry electrons, meaning that only n-type logic can be envisaged. Furthermore, the transistor dimensions are not strongly scaled, and of the order of 0.5 to 2 micron. The challenge in the research is to reach designs with low power consumption and high operating speed, despite the inherent technology limitations. To that end, you will systematically investigate novel logic families, based on some unique properties of the technology, such as the availability of two gates (dual-gate) per transistor. The technology is evolving year after year, such that successive generations of transistors will become available to design cell libraries. Designs will be processed in the imec cleanrooms. In addition to design, you will also be responsible for the circuit measurements, parameter extraction, and the building of new transistor models for subsequent technology generations. Appealing demonstrator circuits for IoT and wearable electronics will showcase the progress of your research.
For this research, you need a solid background in electronic engineering and circuit design. Also, a strong affinity to technology and physics is a must. The PhD work will take place in the large area electronics (LAE) department in imec. The group counts about 45 people with extensive expertise in thin-film processing and design, and has 15 years of experience. We have a very strong international reputation in this field, with multiple ISSCC publications and an H-index for the thin-film electronics activity of 50. This specific PhD work is in the framework of the funded ERC Starter Grant FLICs with Kris Myny as PI and imec as host.
Electronic engineering with affinity for physics and technology.
Type of work:
10% literature study, 10% modeling, 40% design and layout, 40% characterization.
Supervisor: Wim Dehaene
Co-supervisor: Kris Myny
When you apply for this PhD project, mention the following reference code in the imec application form: ref. SE 1704-17.