SLID-ICV Vertical Integration Technology for the ATLAS Pixel Upgrades

Details SLID-ICV Vertical Integration Technology for the ATLAS Pixel Upgrades SLID-ICV Vertical Integration Technology for the ATLAS Pixel Upgrades

2012-02-29

arxiv.org/abs/1202.6497v1

Physics

Instrumentation and Detectors

Proceedings of the Conference "Technology and Instrumentation in Particle Physics 2011"

Scientific paper

We present the results of the characterization of pixel modules composed of 75 um thick n-in-p sensors and ATLAS FE-I3 chips, interconnected with the SLID (Solid Liquid Inter-Diffusion) technology. This technique, developed at Fraunhofer-EMFT, is explored as an alternative to the bump-bonding process. These modules have been designed to demonstrate the feasibility of a very compact detector to be employed in the future ATLAS pixel upgrades, making use of vertical integration technologies. This module concept also envisages Inter-Chip-Vias (ICV) to extract the signals from the backside of the chips, thereby achieving a higher fraction of active area with respect to the present pixel module design. In the case of the demonstrator module, ICVs are etched over the original wire bonding pads of the FE-I3 chip. In the modules with ICVs the FE-I3 chips will be thinned down to 50 um. The status of the ICV preparation is presented.

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