CMS Tracker Week, CERN, October Oct 2004CMS Tracker Week - Module ProductionSalvatore Costa - Catania Report from Module Bonding Working Group Meeting Salvatore Costa Università di Catania and INFN – Sezione di Catania

28 Oct 2004CMS Tracker Week - Module Production2 Salvatore Costa - Catania Outline 1.Global info on production bonding of the Modules 2.Global review of Module bonding quality indicators 3.Selected highlights from Center reports 4.Decision on Module Grading initiative

CMS Tracker Week, CERN, October Oct 2004CMS Tracker Week - Module ProductionSalvatore Costa - Catania Global info on production bonding review of Module bonding quality

28 Oct 2004CMS Tracker Week - Module Production4 Salvatore Costa - Catania Production Summary

28 Oct 2004CMS Tracker Week - Module Production5 Salvatore Costa - Catania Module Pull Tests Performed # Modules pull tested after 01Dec2003 (at last Mtg) Results in DB from 13 Centers out of 14 CenterPA TAPA-SenSen-Sen Bari98 (83 )101 (86 ) n/a Catania51 (51) n/a Firenze9 (9) 5 (5) n/a Padova18 (18) 99 (99) n/a Pisa18 (10) 46 (37) n/a Torino119 (114)46 (46) n/a Fermilab121(119)35 (33)35 (34) Santa-Barbara51 (51) 58 (58)76 (76) Aachen Hamburg69 (62)50 (45)n/a Karlsruhe0 (0)20 (20)n/a Strasbourg20 (20)65 (65) Vienna55 (19)91 (28)n/a Zurich0 (0) 42 (38) n/a

28 Oct 2004CMS Tracker Week - Module Production6 Salvatore Costa - Catania Center Averages BA CT FI PD PI TO FL FL SB SB HA KA ST ST VI ZH. ss ss ss 5g Not angle-corrected yet!

CMS Tracker Week, CERN, October Oct 2004CMS Tracker Week - Module ProductionSalvatore Costa - Catania Selected highlights from the Bonding WG Meeting of 26 Oct 2004

28 Oct 2004CMS Tracker Week - Module Production8 Salvatore Costa - Catania TEC centers In general production Bonding has slowed down or has now come to a stop However, for some TEC centers this was their first chance of reporting on bonding of a significant number of Modules: –Aachen tuned machine parameters using some 5 faulty modules, after which was able to bond 10 with very good results [pull forces 9-10 g and mostly heel breaks, pull test data now in DB]. –Karlsruhe received 23 Ring-5 Modules from Brussels Gantry, bonded 17. At the moment they have problems bonding on the PA, resulting into as many as 20 re-bonds per Module. Perhaps they have to still tune parameters. Also complained that modules arrive with very dusty carrier plates and cleaning them is tricky as that tends to wash the dust on Sensors. –Vienna has now bonded ~115 modules and now is looking into buying a new machine (likely Hesse & Knipps). Zurich has bonded 335 Ring-4 Modules with final 97% acceptance. Bonds are of excellent quality in general as testified by the pull test results. Some specific problems encountered are: –19 modules delivered in July had the pitch adapter protruding over the sensor. –Out of those, 8 modules with variable distance PA – Sensor. –There were about 20 % floating modules. Preparing new jigs to avoid that the stiffener can touch the jig.

28 Oct 2004CMS Tracker Week - Module Production9 Salvatore Costa - Catania TIB centers In general production Bonding has slowed down or has now come to a stop –Catania still has a few modules to bond. Had failure in electronics board of Hughes  fixed. –Firenze also had a serious failure of Delvotec which required service. –Padova reported some technical problems bonding the TIB Layer1/2 stereo modules because of conflict between some jig areas and a certain ceramic support piece of this type of modules. –Pisa said they noticed the same problem and solved by simply milling out a small piece of the jig. Having run out of modules to bond, the other task of monitoring bonding quality of Sensor batches by executing pull test in the half-moon Sensor Test Structures will be now resumed.

CMS Tracker Week, CERN, October Oct 2004CMS Tracker Week - Module ProductionSalvatore Costa - Catania Decision on Module Grading initiative

28 Oct 2004CMS Tracker Week - Module Production11 Salvatore Costa - Catania Module Grading (Gantry  Bonding) Hybrid position check at Gantry –The Gantry group continues to measure, and record in the usual DB tables, data concerning position of the hybrid, –But they no longer write into the DB a NEGATIVE flag (=FAULTY module) based on values of those data AND ship the modules to Bonding REGARDLESS of those data. –Gantry writes a flag anyway (but a POSITIVE one!) to the DB  New Bonding DB interface version (in the works) checks that variable and displays a warning (in the Pre-Bond Inspection Section) if appropriate

28 Oct 2004CMS Tracker Week - Module Production12 Salvatore Costa - Catania Module Grading from Bonding (1) Grading based on # unbonded strips BONDSTATUS_VALFirst flag in BONDSTATUS_VAL vector: – 0 if n_unbonded <1 – 1 if 1% - 2 – -1 if >2% These are consistent to grades A,B,C of ModTest and the module is faulty with >2% unbonded strips.

28 Oct 2004CMS Tracker Week - Module Production13 Salvatore Costa - Catania Module Grading from Bonding (2) In addition to that, we have now adopted a second, independent, Grading scheme based on based on mechanical quality of the bonds –Idea emerged in June 2004 within TIB bonders community –Presented for first time at July 2004 Tracker week –Mixed reactions, different opinions… –The Bonding WG Technical Advisor supports it and has contributed to determining the criteria for this grading –I will now implement it with the next release of the Bonding DB I/F and start looking after its adoption by Centers

28 Oct 2004CMS Tracker Week - Module Production14 Salvatore Costa - Catania Module Grading from Bonding (3) Grading based on mechanical quality of the bonds Technical implementation: –Add in the BONSTATUS_VAL vector a second flag –Possible second flag values would be again 0,1,-1 corresponding to grades A,B,C. –For example a module with BONDSTATUS_VAL=“:0:1:” would be of grade A for # of unbonded strips, but grade B for mechanical quality of the bonds

28 Oct 2004CMS Tracker Week - Module Production15 Salvatore Costa - Catania Module Grading from Bonding (4) Grading based on mechanical quality of the bonds Criteria to generate this second flag: –# Bias Bonds (Spec: 5, 15 for TIB back) >2: grade A (flag 0) 2: grade B (flag 1) <2: grade C (flag -1) –# “critical” readout bonds [definition list of “critical” by Alan]: ≤ 2%: grade A (flag 0) > 2%: grade B (flag 1) > 20%: grade C (flag -1) –Operator judgment on all other bonds [guidelines to issue this judgment by Alan]: A, B, C. These criteria will be or’ed together to generate flag.

28 Oct 2004CMS Tracker Week - Module Production16 Salvatore Costa - Catania Module Grading from Bonding (5) Grading based on mechanical quality of the bonds Method to generate this second flag: –Add to Bonding DB I/F section where operators may enter: –Number of bias bonds in each spot –Number of “critical” readout bonds as defined by Alan –Judgment on non-critical readout bonds as per Alan’s guidelines –Explanation of reason(s) why a module may be non-trustworthy I/F script will calculate final flag Of course all these new fields will default to “perfect module” values Normally operator will have nothing to type if Module was bonded with no problems