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CTU - Czech Technical University in Prague
Publication  > Articles in Impacted Journals  > 'The RELAXd project: development of four-side tilable photon counting imagers'
The RELAXd project: development of four-side tilable photon counting imagers

Author
De Moor Piet IMEC

Year
2008

Scientific journal
Nucl. Instr. and Meth. A, Volume: 591, Issue:1, Pages: 241-244, doi: 10.1016/j.nima.2008.03.099

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Abstract
The feasibility of using photon-counting imaging techniques with X-rays, neutrons or other types of radiation for many applications in materials analysis and bio-medical sciences, has already been well demonstrated. A hybrid imager consisting of an appropriate sensor chip flip-chipped on top of a Medipix2 readout ASIC is an example of such a device. It can count single X-ray photons, without any noise or dark current, at high fluxes (several Gigaphotons per cm2 per second). The limiting factors for more widespread usage of these devices in bio-medical applications (e.g. mammography or small animal imaging) are the small size of the active area (about 2 cm2 per chip) and the low frame rate. The aim of the RELAXd project (high REsolution Large Area X-ray Detector) is to develop a high frame-rate, fully 3D-integrated microsystem, consisting of four Medipix2 readout chips bump-bonded to one silicon sensor chip. This paper presents first results of this task focusing on the used wafer-level post processing technologies which are needed to achieve the 3D architecture, required for four-side tiling.

Cite article as:
P. De Moor, "The RELAXd project: development of four-side tilable photon counting imagers", Nucl. Instr. and Meth. A, Volume: 591, Issue:1, Pages: 241-244, doi: 10.1016/j.nima.2008.03.099 (2008)

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