Speaker
Description
This report presents the status of HGCal silicon module mass production at the IHEP MAC, as part of the CMS High-Granularity Endcap Calorimeter upgrade for the HL-LHC. The IHEP MAC, one of six global silicon module assembly centers, focuses on low-density (LD) full silicon modules, with an expected workload of around 5,000 modules. The production chain includes hexaboard taping, electronic testing, gantry assembly, OGP inspection, wire bonding, encapsulation, and MMTS thermal cycling with IV scans. IHEP has established a complete production and quality control workflow, achieving a stable rate of 16 modules per day in an 8-hour shift, with a maximum of 18 bonded modules per day. Online systems, including a Web UI and a shift coordination system, support production tracking and scheduling. Key issues such as hexaboard pad contamination, oxidation, and CuW baseplate oil contamination have been identified and mitigated. Over the past year, IHEP produced 555 modules, contributing to a total of 2,759 modules across all six MACs.