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Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter
In the silicon tracker for the Compact Muon Solenoid experiment at the forthcoming Large Hadron Collider of CERN, each silicon sensor is connected to the front-end electronics by a pitch adapter, the structure of which consists of a fan of very thin chromium strips coated with a few microns aluminiu...
Autores principales: | , , , , , , , |
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Lenguaje: | eng |
Publicado: |
2004
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.nimb.2004.01.150 http://cds.cern.ch/record/816778 |
_version_ | 1780905436566781952 |
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author | Massi, M Giuntini, L Fedi, M E Arilli, C Grassi, N Mando, P A Migliori, A Focardi, E |
author_facet | Massi, M Giuntini, L Fedi, M E Arilli, C Grassi, N Mando, P A Migliori, A Focardi, E |
author_sort | Massi, M |
collection | CERN |
description | In the silicon tracker for the Compact Muon Solenoid experiment at the forthcoming Large Hadron Collider of CERN, each silicon sensor is connected to the front-end electronics by a pitch adapter, the structure of which consists of a fan of very thin chromium strips coated with a few microns aluminium deposition, on a glass support. The absence of contaminants in the depositions is of crucial importance for the electrical and mechanical reliability of the micro-bonding connections. The PIXE set-up of the Florence external micro-beam facility appeared to be suitable to analyse the metal deposition of an adapter, on which the micro-bonds had shown mechanical and electrical problems. Our measurements pointed out a significant copper contamination of the metal deposition on the faulty adapter, while no copper was detected in another one, which showed a correct behaviour at bonding. This suggests a possible role of Cu impurities in the encountered problems during micro-bonding. |
id | cern-816778 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2004 |
record_format | invenio |
spelling | cern-8167782019-09-30T06:29:59Zdoi:10.1016/j.nimb.2004.01.150http://cds.cern.ch/record/816778engMassi, MGiuntini, LFedi, M EArilli, CGrassi, NMando, P AMigliori, AFocardi, EUse of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapterDetectors and Experimental TechniquesIn the silicon tracker for the Compact Muon Solenoid experiment at the forthcoming Large Hadron Collider of CERN, each silicon sensor is connected to the front-end electronics by a pitch adapter, the structure of which consists of a fan of very thin chromium strips coated with a few microns aluminium deposition, on a glass support. The absence of contaminants in the depositions is of crucial importance for the electrical and mechanical reliability of the micro-bonding connections. The PIXE set-up of the Florence external micro-beam facility appeared to be suitable to analyse the metal deposition of an adapter, on which the micro-bonds had shown mechanical and electrical problems. Our measurements pointed out a significant copper contamination of the metal deposition on the faulty adapter, while no copper was detected in another one, which showed a correct behaviour at bonding. This suggests a possible role of Cu impurities in the encountered problems during micro-bonding.oai:cds.cern.ch:8167782004 |
spellingShingle | Detectors and Experimental Techniques Massi, M Giuntini, L Fedi, M E Arilli, C Grassi, N Mando, P A Migliori, A Focardi, E Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter |
title | Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter |
title_full | Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter |
title_fullStr | Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter |
title_full_unstemmed | Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter |
title_short | Use of micro-PIXE analysis for the identification of contaminants in the metal deposition on a CMS pitch adapter |
title_sort | use of micro-pixe analysis for the identification of contaminants in the metal deposition on a cms pitch adapter |
topic | Detectors and Experimental Techniques |
url | https://dx.doi.org/10.1016/j.nimb.2004.01.150 http://cds.cern.ch/record/816778 |
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