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CMS Pixel Detector
Miscellaneous
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Phase 1
Phase 2
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Layer 1 Replacement
Layers 2-4
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| Layer 1 Replacement Elog |
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Message ID: 20
Entry time: Wed Oct 2 12:41:16 2019
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| Author: |
Dinko Ferencek |
| Category: |
Module assembly |
| Subject: |
First production modules assembled |
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First production modules (M1530, M1531, M1532) were built on Monday, Sep. 30 2019.
There was a problem with wire bonding of ROC5 on M1530. There is a small crater on one of the ROC pads which appears to had been created by the BareModule probe card needle.
After initial tests with pXar of the 3 modules, noticed the following:
M1530: data missing from ROCs 4 and 5 (expected based on the wire bond problem on ROC5) but otherwise looks fine
M1531: could set Vana but setvthrcompcaldel and pixelalive not showing any data
M1532: looks fine.
Caps were glued to M1530 and M1532 (damaged cap was glued to M1530) and Reception tests were run before and after gluing. Attached are the bump bonding threshold maps before and after cap gluing and the (before - after) difference for M1530 and M1532. |
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