Sheffield Semiconductor Development Facility
The Sheffield Semi-Conductor Development Facility is a specially designed, temperature controlled ISO 14664-1 Class 5 and 7 clean room facility.
The facility has been design to keep Sheffield University at the forefront of radiation hard Silicon Sensor development. The facility was opened in the autumn of 2015 and is currently being used to construct components for the ATLAS High Luminosity upgrade.
There is 16.8m2 of ISO Class 5 clean room and 19.9m2 of ISO Class 7 clean room to allow different project to be worked on simultaneously without interference.
The Clean Room is managed by Sam Edwards.
Hesse Bonjet BJ820
The Hesse Bonjet BJ820 is a high speed fully automatic wire wedge bonder. It can be used in fully automatic or manual mode allowing us to either create programs to perform repeatable tasks or to work on single prototype pieces.
The BJ820 has a fully integrated vision system allowing for pattern recognition to search bond pads or fiducial points.
Although currently working with 25 µm Aluminium wire the BJ820 can work with various thicknesses of ribbon or wire of Aluminium, copper or Gold.
The BJ820 has a 305 mm x 410 mm working area, and an accuracy to within 1 µm whilst being able to bond at up to 7 wires per second.
We are currently using this machine to bond up modules for the WP3 part of the ATLAS HL-LHC Upgrade.
Image of Mechanical Hybrid for ATLAS Upgrade being wire bonded on the BJ820.
OGP Smartscope Flash CNC 200
The OGP Smartscope Flash CNC 200 is a fully automatic measurement system. It has 3 different measurement systems, Vision, Laser and touch probe allowing a variety of different practical applications. It has a working area of 200 x 200 x 150 mm (XYZ) and has is accurate to 3 µm in the XY direction over 200 mm and an accuracy of 2.3 µm in Z axis over 150 mm.
Its vision system and pattern recognition system means it allows for repeatable adjustable measurements.
The Flash CNC 200 is currently being used to take metalogy results of Sheffield constructed modules for the ATLAS HL-LHC Upgrade.
ALiBaVa SystemsWe have 3 ALiBaVa systems that are currently being used to test ATLAS 7 mini sensors pre and post irradiation for annealing.
Future Equipment in 2016
We are soon to receive an Inseto Dage 4000+ pull tester, for use in conjunction with the BJ820 to give comprehensive data on wire bonding quality.
The Dage 4000+ is an Advanced Bond Tester and Micro Materials tester combined. It has real-time data acquisition with on-board data analysis.
Other than Wire pull tests in can do:
- Tweezer Pull Test
- Hot Bump Pull
- Cold Bump Pump
- Fatigue - Push/Pull Testing
- Solder Ball Pull & Shear Test
- Ball Bond Shear Testing
- Wedge Bond Shear Test
- Large Wire & Ribbon Shear
- Lead Free Zone Shear & Component Shear
- Die Shear & Stud Pull
- Die Crush Testing
- Cavity Shear Testing
- Stacked Overhanging Die testing
- Passivation Layer Testing
- Materials Testing
Probe StationsDuring 2016 our current probe-stations will be replaced with updated equipment. A fully automatic probe-station with cooling capability with high resolution SMU and DAQ will be installed in October 2016. Measurements are also possible to be made with the cooled chuck and tri-axial connection to sensor back plane.
Current manual probe-stations will be reduced to allow space for a semi-automatic probe station and newer manual probe stations leaving the facility equipped for taking the following measurements:
- I-V characterisation - leakage of sensor, leakage of strip
- C-V characterisation - full depletion voltage
- Interstrip capacitance
- Interstrip resistance
- AC Coupling capacitance
- Polysilicon bias resistance
- Leakage current to strip
- Noise injection
- Current, voltage
- DC/DC signal to noise ratio
- Noise charge (ENC)
- Impedance measurement (Piezoelectric ceramic)
- Edge TCT (Transient Current Technique)to measure the charge collection depth (depletion depth) with Laser time response
Manual BonderK&S iBonder 5000 Wedge Bonder
- Ultrasonic Wedge, Tab, Stitch and Ribbon abilities
- 30/45 Deep Access wire feed
Department of Physics and Astronomy, University of Sheffield, Hounsfield Road, Sheffield S3 7RH, UK
Page maintained by Ian.Dawson@cern.ch.