Wire Bonding and Reliability Testing Service

The CERN EP/DT Bond Lab, Quality Assurance and Reliability Testing (QART) Lab and Departmental Silicon Facility (DSF)

 The Wire Bonding and Reliability Testing Service is a service provided by the Detector Technologies (DT) group in the Experimental Physics Department (EP). It consists of two laboratories and a shared user space facility. The laboratories are the Wire Bonding Lab (“bondlab”) and the Quality Assurance and Reliability Testing Lab (QART lab). The Departmental Silicon Facility (DSF) is a shared work area consisting of a clean room (approximately class 10000 or ISO 7) zone and an ordinary zone. This facility is open to all CERN experiments that require a clean room work area, however the space allocation gives priority to the LHC experiments silicon detectors. The two labs are also located in the DSF facility which is housed in the lower floor of building 186, a large assembly hall.

 The bondlab has been a CERN service since the late 1990’s and continues to be heavily used by CERN experiments and projects for making micro-­‐connections to solid state sensors and to electronics chips on bare silicon die. Wire bonding is extensively used in industry for chip to package connections but the type of wire bonding done in the CERN bondlab is tailored more for large size silicon sensors, for one-­‐off prototypes and for extremely difficult connections that would be prohibitively expensive or are outside the possibility of industrial bonding services. The bondlab provides advice and assistance on all types of wire bonding related design, construction, operations, and problems encountered in silicon detectors and with front-­‐electronics micro-­‐connections.

 The QART lab is a more recent service (since 2009) whose purpose is two-­‐fold. One is to provide resources concerning quality assurance to the CERN community as a whole but focussed primarily on silicon detector technology. These resources include information (procedure documents, standards), advice and a common “library” of experiences gained from the high energy physics community concerning the quality issues in building silicon detectors. The other main purpose of the lab is to provide equipment and expertise with this equipment in order to perform reliability testing. Such an equipment base was deemed useful since many of the test machines are very expensive and need trained operators. However, the long lifetimes required of the LHC experiments inner detectors and electronics meant that high reliability would be essential. This lab has environmental test chambers, a vibration test system, infrared cameras, a small but high field (2T) normal magnet, and a variety of other smaller devices. The QART lab can also provide advice and assistance in many aspects of silicon detector design, construction, and operations.

 As for the DSF itself, both the bondlab and QART lab are open to all CERN related projects with priority given to the LHC experiments silicon detectors. This priority is a result of the origins of the facility which was funded for the purpose of supporting the LHC silicon detectors and their upgrades. Note that even non-­‐ CERN related projects can make use of our service (we have worked on NASA, B-­‐ factory, ESRF, educational, and many other projects) but such work is accepted only if resources and schedule allow it.
For more detail about our service, please visit our dedicated website.

Glue dispensing robot, I&J Fisnar 7300
Die bonder, CAMMAX DB 600
Automatic Wire Bonder DELVOTEC 640