CEA-LETI (an Institute of Commissariat à l’Energie Atomique et aux Energies Alternatives or CEA), located in Grenoble, France, with more than 1400 employees is a major research centre for Microelectronics, Microtechnologies, Optronics and Instrumentation in Europe. LETI benefits from platforms within Minatec (Europe’s main Centre of Excellence in Micro- and Nano-technology) which group expertise and resources found nowhere else in Europe, such as the 300mm silicon technology platform, the 200mm microelectronics platform, the 200mm MEMS200 microsystems platform, the nanocharacterisation platform, the upstream platform and the design platform.

A dedicated division, LETI/DTBS (Micro-technologies for Biology and Healthcare Division, 180 people including 25 PhD and post-docs) develop applications of micro-nano technologies in the field of health. It is part of CEA's strategy to become a centre for research of international standard in Information Technologies and Health. The challenge for the LETI/DTBS is to create devices and systems highly miniaturized and incorporating intelligence in order to improve performance and reduce costs.

LETI/DTBS has a long experience in research and developments of X-ray and gamma-ray imaging detectors. To develop new imaging solutions, we associate skills in physics, modelling and simulation, electronics and information processing, with innovative technologies from others LETI Departments (ASIC design, innovative packaging, new materials). Today, we have a world recognize expertise in X-ray and gamma-ray imaging detectors for medical, security, and scientific applications based on semiconductor detection material.

Another division, LETI/DOPT (Optronics Division, 200 people including 40 PhD and post-docs), develops devices for imaging sensors and photonic components. LETI/DOPT led material research in the development of crystals for scintillators. LETI/DOPT has a strong experience in developing and transferring imaging technologies, (for example: infrared cooled HgCdTe detectors and un-cooled amorphous-silicon micro-bolometers, which led to the creation of companies Sofradir and Ulis). LETI/DOPT also has a strong relationship with ST Microelectronics, especially in the field of visible CMOS sensors.

LETI/DOPT imaging activities are oriented towards the improvement of sensor performances in visible, cooled and un-cooled infrared detectors. LETI/DOPT activities also deal with the integration of traditional optical functions in image sensors: filters, lenses, auto-focus, zoom. These activities include optical design, characterization and packaging competencies, beyond the technological aspects