Pavel Weber
(Kirchhoff-Institut fur Physik (KIP))
The Pre-Processor Multi-Chip Module (PPrMCM) is the main processing block of the
Pre-Processor System in the ATLAS Level-1 Calorimeter Trigger. The PPrMCM holds a
dedicated signal-processing ASIC and a Phos4 timing-chip together with seven
commercial dice mounted on the substrate. Those are four FADCs and three
LVDS-serialisers.
The PPrMCM holds the main functionality of the Pre-Proccessor System, namely the
digitization, calibration and Bunch-Crossing-Identification of calorimeter signals.
The production phases of the PPrMCMs (more than 3200) and test procedures for
quality control at different stages of the production are presented.
Summary
The Pre-Processor Multi-Chip Module (PPrMCM) is the most crucial part of the of the
Pre-Processor System of the ATLAS Level-1 Calorimeter Trigger. The main tasks of the
PPrMCM are the digitization, calibration and Bunch-Crossing-Identification of all
ATLAS calorimeter signals.
The production of the PPrMCM is done in several steps. The main steps are substrate
manufacturing, dice placing and bonding, “Glob-top” protection and hermetic
brass-cover soldering.
Among the chips on the PPrMCM, the Pre-Processor ASIC (PPrASIC) is the major
component as it performs the ATLAS-specific digital data processing. Thorough tests
of the PPrASIC and of the complete PPrMCM were developed and combined later into a
testing framework. The framework contains the software to perform automatic tests in
order to verify the full functionality of the PPrMCM. It is applied after each
PPrMCM production phase starting with the ASIC-dice production on wafers, up to final
acceptance-tests for the complete MCM-assembly. This strategy allows to detect faulty
components at early stages of production. Such components can be located and
replaced in a repair cycle. This improves initial production yield from 87% to an
even higher percentage.
More than 3200 fully functioning PPrMCMs are produced and ready to be installed in
the ATLAS Level-1 Calorimeter Trigger. The experience gained from the large scale
production of the PPrMCM is reported including the optimization of the test
procedures, the production yields, observed problems and corresponding solutions.
A. Hidvégi
(Fysikum, Stockholm University, SE-10691 Stockholm, Sweden)
A. Watson
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
A.O. Davis
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
A.R. Gillman
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
B. Bauss
(Institut für Physik, Universität Mainz, D-55099 Mainz, Germany)
B.M. Barnett
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
C. Bohm
(Fysikum, Stockholm University, SE-10691 Stockholm, Sweden)
C. Gewiniger
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
C.J. Curtis
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
C.N.P. Gee
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
D. Typaldos
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
D.G. Charlton
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
D.P.C. Sankey
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
E. Eisenhandler
(Physics Department, Queen Mary, University of London, London E1 4NS, UK)
E.E. Kluge
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
E.E. Woerhling
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
F. Föhlisch,
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
F. Rühr
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
G. Mahout
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
H.C. Schultz-Coulon
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
I.P. Brawn
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
J. Edwards
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
J.P. Thomas, Thomas,
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
J.R.A Booth
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
K. Mahboubi
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
K. Meier
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
K. Schmitt
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
M. Landon
(Physics Department, Queen Mary, University of London, London E1 4NS, UK)
P. Hanke
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
P.J.W. Faulkner
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
P.M. Watkins,
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
R. Achenbach
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
R. Stamen
(Institut für Physik, Universität Mainz, D-55099 Mainz, Germany)
R.J. Staley
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
S. Hellman
(Fysikum, Stockholm University, SE-10691 Stockholm, Sweden)
S. Hillier
(School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK)
S. Rieke
(Institut für Physik, Universität Mainz, D-55099 Mainz, Germany)
S. Silverstein
(Fysikum, Stockholm University, SE-10691 Stockholm, Sweden)
S. Tapprogge
(Institut für Physik, Universität Mainz, D-55099 Mainz, Germany)
T. Trefzger
(Institut für Physik, Universität Mainz, D-55099 Mainz, Germany)
U. Schäfer
(Institut für Physik, Universität Mainz, D-55099 Mainz, Germany)
V. Andrei
(Kirchhoff-Institut für Physik, University of Heidelberg, D-69120 Heidelberg, Germany)
V.J.O. Perera
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
W. Qian
(CCLRC Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK)
