Hamburg Bonding Report

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Hamburg Bonding Report

• Georg Steinbrück
• Hamburg University
• CMS Meeting June 2004

• Report from Hamburg
• Pull tests stats
• Loop heights
• ARC tests

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Bonding in Hamburg

• Hamburg was recently officially certified for
  bonding
• Sent 3 modules to CERN for inspection
• Have bonded 37 Modules in Hamburg so far
• 8 R1N 13 R1S 16 R3
• 20 more modules HV bonded
• Throughput impacted by
• Need to support sensors under HV bonds by
  inserting capton tape
• Pull tests Basically increases bonding time x2
• HV and Sensor Bonding in two steps

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Experience

• Initially had a lot of trouble with the HV bonds
  and outer sensor bonds since sensor not well
  supported in this area
• Went through some trouble building a good
  bonding jig
• Had glueing scheme for frame adjusted Glue
  spots carbon-capton and capton-sensor were NOT
  aligned, now aligned?Results look much better,
  but additional support still needed
• Some PAs were not glued parallel, making
  bonding hard
• We gave feedback to gantries, problems
  known/solved

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Module 30200020029287
One recent example of a glueing problem
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Pull Test Results PA test Area
R1N
R1S
R3
Based on 30 modules.
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Pull Test Results 50th wire PA-Sensor
R1S
R1N
R3
Based on 30 modules.
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Loop heights
PA test bonds
PA-sensor bonds
280 mus
30 deg
1mm
30 deg
Sorry, no pictures...
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ARC tests
ARCS 7.0 with TIB one sensor cuts (except for
noise cuts For R1) Xml files with Xflag 4.2
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ARC tests Cuts
Correct R1 cuts by difference in noise means
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Statistics details
37 Modules bonded in HH, 30 tested

• 22 grade A, 4 grade C
• no new pinholes found
• 7 faulty modules
• 3/131 fail initial ARC fast test

32019
Sent out w/o full test
30200020032001 bent hybrid bonds, in bond center
for repair?Not fully tested 30200020032002 root
file?
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Fault stats Ring 3
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Fault stats Ring 1
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IV curves R1 and R3
Module 3020002002021 already had high current
before PA-Sensor bonding. Graded AF (IMODgt5xISen)
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Test Results on the Web
Thanks to Marko Dragicevic (Wien) for supplying
the scripts!
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Web
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Summary

• Bonded and tested 37 modules 20 modules HV
  bonded
• Bonding rates are increasing
• Quality of gluing of modules is critical and has
  improved
• Pull test results look goode
• ARC tests uploading to db routine now
• 4 grade C modules

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Backup
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Module 30200020032011
Bad APV
Cosmic run
Two events in a cosmic run
Difference max and min PH in ARC LED test
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Module 30200020026938 (R1S)
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Difference max and min PH in ARC LED test
Mean pedestal versus pipeline for bad APV
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Module 30200020032019
Difference max and min PH in ARC LED test
Mean pedestal versus pipeline for bad APV
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Module 30200020027058
38
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ARC testing in Hamburg

• 22 grade A, 4 grade C
• no new pinholes found
• 7 faulty modules
• 3/131 fail initial ARC fast test

30 Modules bonded and tested
Using ARCS 7.0 and Xflag 4.2 Keeping up with
database
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Bonding in Hamburg
R1N
R1S
R3

• 30 Modules bonded
• initial issues with HV bonds/glue resolved

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Currents before and after Sensor Bonding