CERN Accelerating science

CMS Note
Report number	CMS-NOTE-2004-010
Title	Silicon Tracker Module Assembly at UCSB
Author(s)	Affolder, Anthony ; Affolder, K ; Allen, Andrea ; Campagnari, Claudio ; Hale, David ; Incandela, Joe ; Kyre, Susanne ; Staszak, D D ; Stoner, J ; Taylor, Russell ; White, Dean
Submitted by	08 Jun 2004
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Free keywords	SOFTWARE
Abstract	This note details the infrastructure deployed and developed at the University of California at Santa Barbara (UCSB) to handle the construction of CMS Silicon Tracker modules for the outer barrel and endcap. Capacity has been developed to assemble and wirebond 15 modules per day and in addition to wirebond 30 hybrids. Early results and experiences of production are also given. In the first substantial module build, 5.3% of 150 modules were slightly outside of the mechanical specifications. Based on the data obtained during that build, it was possible to introduce correction factors which resulted in the 58 subesquent modules constructed being all within specifications. For module bonding a very low introduced failure rate of only 0.005% is observed. A higher corresponding rate for hybrid bonding of 0.022%, is attributable to one particular batch of problematic hybrids.
Copyright/License	Preprint: (License: CC-BY-4.0)

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