Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 37: Silicon trackers 2

T 37.5: Talk

Tuesday, March 5, 2024, 17:00–17:15, Geb. 30.22: kl. HS B

Quality control for the production of multi-chip modules for CMS Inner Tracker — •Chin-Chia Kuo, Massimiliano Antonello, Erika Garutti, Bianca Raciti, Jörn Schwandt, and Georg Steinbrück — University of Hamburg, 22761, Luruper Chaussee 149, Hamburg, Germany

Quality control studies of Inner Tracker quad modules for the Phase-2 upgrade of the CMS Inner Tracker are presented. An Inner Tracker quad module is a hybrid detector consisting of a silicon pixel sensor and four (2 × 2) CMS Readout Chips (CROCs) coupled via fine pitch flip-chip bump bonding. In this design, the space between adjacent readout chips is bridged using large sensor pixels.

Several methods for measuring the yield of missing bumps are presented and compared, which will be part of quality control after mass production. Furthermore, the performance of large pixels is presented with quad modules tested at the DESY testbeam facility, using electrons with an energy of 5.2 GeV.

Keywords: Quality control; CMS Phase-2 upgrade; Pixel detectors; RD53B_CMS quad module; Testbeam