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We have designed, fabricated in 90 nm technology and tested a prototype ASIC for readout of semiconductor pixel detectors for X-ray imaging applications. The 4mm × 4mm readout IC is working in single photon counting mode and contains a pixel matrix of 1280 readout channels with dimensions of 100um × 100um each. We present the architecture, the measurement results of this IC and our conclusions. To make this chip more attractive for novel experiments, we need to further increase single pixel functionality and at the same time reduce the pixel area. This leads us to the 3D technology with at least two layers: analogue and digital and additionally the sensor layer. We present the concept of the 3D hybrid pixel chip design with small pixel size and the ability to build a dead-space free large area pixel matrix.
Date of Conference: 16-18 June 2011