The upper pictures show ring 5 and 7 modules mounted on a petal. The silicon and the front end hybrids have been glued onto the frames at the Uni. Brussels and Uni. Lyon. The electrical connections between sensors and front-end electronics and the module testing were done at the RWTH Aachen, Uni. Hamburg, Uni. Karlsruhe, Uni. Lyon, Uni. of California Santa Barbara (USA), Uni. Strasbourg, and ETH Zurich.
Fully qualified modules were than distributed to the petal integration centers (RWTH Aachen, Uni. Brussels, Uni. Karlsruhe, Uni. Louvain, Uni. Lyon and Uni. Strasbourg) where they were mounted onto the petals.