Production and test of Micromegas boards for the ATLAS New Small Wheel project

The muon system of the ATLAS Experiment will be upgraded in 2021 with Micromegas detectors covering an active area of about 1280 m$^{2}$, being the largest system based on Micro Pattern Gaseous Detector (MPGD) ever built so far. The key element of the detectors are the anode boards which carry the readout strips, the resistive protection layer and the insulating pillars supporting the mesh. In total 32 different types of boards for 34 modules with size up to 40x220 cm2 have been produced. The boards are produced by two companies in Europe, which opened the road to MPGD mass production, with the production now finished. The boards undergo a detailed quality control and quality assurance checks at CERN, prior to be mounted into the final detectors. In this work the technological transfer effort made by CERN and ATLAS to make the Micromegas board production an industrial process are described.