Welcome in ESIEE Paris new cleanrooms. A cleanroom is a laboratory where the dust level is controlled. This allows the fabrication of devices 10 to 100 times smaller than a hair. These new cleanrooms are on 650 m² with 70 equipments CLASS 100 (ISO 5) AND 10 000 (ISO 7) for device fabrication for industry and research, and for engineers and PhD students training. The application fields we address are highly diversified: biomedical, aviation, communication, internet of things, sustainable city and energy. ESIEE Paris new cleanrooms and the Investment for the future « ESIEE Connect » will allow us to extend our offer, especially to internet of things. We will intensify our training, research and business support activities with prototyping, fabrication of small and medium-sized batches, and technology transfer.