Tracker Week, CERN, Oct Oct 2003Tracker Week - Module ProductionSalvatore Costa - Catania Executive summary from Bonding WG Meeting 21 Oct 2003 Salvatore Costa INFN Catania

23 Oct 2003Tracker Week - Module Production2 Salvatore Costa - Catania Summary of recent TIB&TOB prod

23 Oct 2003Tracker Week - Module Production3 Salvatore Costa - Catania Module Pull Tests (1)

23 Oct 2003Tracker Week - Module Production4 Salvatore Costa - Catania Module Pull Tests (2) Firenze ToPd Santa Barbara

23 Oct 2003Tracker Week - Module Production5 Salvatore Costa - Catania Module Pull Tests (3) FirenzeToPdSanta BarbaraBariPisa

23 Oct 2003Tracker Week - Module Production6 Salvatore Costa - Catania Module Pull Tests (4) Santa Barbara

23 Oct 2003Tracker Week - Module Production7 Salvatore Costa - Catania Highlights from Center Reports AACHEN  Just completed pilot run for TEC with 10 R6 frames. Bonded and tested the 10 frames within two days. No problems with the P.A to sensor bondings. Had 1-2% failures (~5-8 lift- offs) during automatic bonding sensor-to-sensor. Investigating this with Hesse&Knipps. BARI  Got 48 Hyb in Sep. Bonded APV-PA for 11. New PAs pose no bonding problems. CATANIA  Both Hughes are back in operation and equipped with fresh wire, after fixing hw damage suffered in moving from old to new Dept. Building  Will begin bonding Test Structures, Modules after this TK Week CERN  “Whiskers” still a problem in Bonding APVs to Planar PA with Delvotec).It appears that K&S 8090/8060 do not have this problem. So, UCSB OK.  FNAL has accepted to help in bonding TEC 2,5,6). Hybrid bonding at CERN is otherwise OK. If FNAL does pick up 20% of PA-APV bonding, will need to bond about 24 hybrids per day instead of 35/day. PISA  Showed Pull test results for Sensor qualification on 32 new Test Structures (16 STM and 16 Hamamatsu). –Over 898 channels total pull tested, FBL or SBL occurs on 16 strips (1,78 %) –An overall summary of 199 Test Structures (145 STM and 54 Hamamatsu) indicates that over 5560 channels total pull tested, FBL or SBL occurs on 118 strips (2,12 %)

23 Oct 2003Tracker Week - Module Production8 Salvatore Costa - Catania Highlights from Center Reports  Reported on mechanical stress tests of proposed (now adopted) Hyb cable stiffener. 3 out of 4 Modules were retrofitted with stiffener and all 4 tortured with many different types of mechanical stress. Subsequently tested, the 3 with stiffener showed normal electric behavior, while in the one without 6/13 lines were lost, besides exhibiting evident cracks at optical inspection. SANTA BARBARA  Received first Hybrids with Planar PA's, bonded, and didn't see any of the "whiskering" problem that Alan had found.  Received first 6-chip hybrids and bonded 8 of them. Also bonded 5 of the 4-chip hybrids. (All the stereo hybrids received were already bonded).  Bonded 2 6-chip modules, 3 stereo modules.  All modules have been fully tested with ARCS and LT system –Both pulsed and continuous LED tests taken –ALL of 42 strips designated in DB as bad-CAC and isolated had regular test results (passed) –No problem seen with these channels  Also worked (Tony) on adding stiffener to Hybrid cable  test  also OK. STRASBOURG  Working on Just received 15 modules of the ring 7. VIENNA  Will need to adapt jig as soon as they receive Modules with new frame ZURICH  Received 4 Modules which all failed test after ground bonding

23 Oct 2003Tracker Week - Module Production9 Salvatore Costa - Catania Alan’s Comments on mod to TEC modules to avoid bond breakage TEC module design modified, adding a ceramic piece to be glued between Sen & PA spacer (and Sen-Sen). Ceramic piece and glue joint are exactly where one wants to support the module for bonding. Thus, bonding jigs must be modified. Alan would like to know how and how it works. TID modules may also have the same risk of bond breakage so some solution will have to be devised for them as well. Alan would like to know that solution and how it works.

Tracker Week, CERN, Oct Oct 2003Tracker Week - Module ProductionSalvatore Costa - Catania Which strips should the Bonders skip because of known Sensor defects (a question from Bonding WG to Sensor experts)

23 Oct 2003Tracker Week - Module Production11 Salvatore Costa - Catania Recipe for strips to leave unbonded React only to bond immediately upstream of sensor with bad strip Skip (= leave unbonded) –All bad IDIEL (considered pinholes) (IDIEL_1_SEN_.POSITION_OF_BAD_STRIPS) –All Isolated bad CAC (believed to have high chance to develop into pinholes with irradiation) (CAC100HZ_1_ SEN_.POSITION_OF_BAD_STRIPS) –All but lowest in a bad CAC chain (believed to represent shorts) (CAC100HZ_1_ SEN_.POSITION_OF_BAD_STRIPS) CAC Example: skip isolated 3, skip all but lowest in chain, or: bond only 34

23 Oct 2003Tracker Week - Module Production12 Salvatore Costa - Catania Isolated bad-CAC strips Recently questioned, because: They should fail the Pinhole search with Karlsruhe’s LED system But some Italian Labs and UCSB have bonded them anyways in this initial Module Prod for investigation purposes and found no evidence of pinholes: >>>>>>>>>>>> LED test NEVER failed <<<<<<<<<<<< We wanted to learn more on bad I_DIEL & bad C_AC strips  I’ve performed a comprehensive study of the bad strips…and…  as a result of this study, we are no longer confident on any part of our current rule to skip bad strips  So we are turning to Sensor experts for guidance!

23 Oct 2003Tracker Week - Module Production13 Salvatore Costa - Catania Bad strips study In DB there are relevant data, in Tables IDIEL & CAC100HZ, for 2427 Sensors For 7 Sensors, data are nonsense  2420 Sensors are included in this study For each of 2420 sensors, download from DB: 1)I_DIEL value (in nA) for all strips 2)List of bad strips for I_DIEL 3)C_AC value (in pF) for all strips 4)List of bad strips for C_AC

23 Oct 2003Tracker Week - Module Production14 Salvatore Costa - Catania

23 Oct 2003Tracker Week - Module Production15 Salvatore Costa - Catania Bad strips study Accounting: out of 2420 Sensors… 1.Bad-I_DIEL strips are 2898 in total (~1.2 per Sensor in average) 2.Bad-C_AC strips are in total (~4 per Sensor in average) 1.Of these, 3707 are ‘isolated’, 6544 are ‘chain’ (‘shorted’) 2.Out of the 3707 isolated bad-C_AC strips: (30%) are also flagged as bad-I_IDIEL (70%) are not flagged as bad-I_IDIEL Plot Distributions of: 1.I_DIEL for good-I_DIEL strips (expect ~0) 2.I_DIEL for bad-I_DIEL strips (expect >0, but… ) 3.‘relative’ C_AC for isolated bad-C_AC strips (expect small values, <1) 3.‘relative’ C_AC for chain bad-C_AC strips (expect integer multiples, 2, 3,…, but… ) 4.IDIEL for isolated bad-C_AC strips which are also in bad-I_DIEL list 5.IDIEL for isolated bad-C_AC strips which are not in bad-I_DIEL list

23 Oct 2003Tracker Week - Module Production16 Salvatore Costa - Catania I_DIEL for good strips (1) Plotted for 869,158 strips (approx 1700 Sensors) Extends to ~1  A but peaks near 0 as expected

23 Oct 2003Tracker Week - Module Production17 Salvatore Costa - Catania I_DIEL for good strips (2) Plotted for 869,158 strips (approx 1700 Sensors) 857,754 (99 %) are within 1 nA

23 Oct 2003Tracker Week - Module Production18 Salvatore Costa - Catania I_DIEL for good strips (3) Plotted for 869,158 strips (approx 1700 Sensors 742,388 (85 %) are within 0.1 nA ~560,000 (65%) have I_DIEL=0.00 There are a few negative values

23 Oct 2003Tracker Week - Module Production19 Salvatore Costa - Catania I_DIEL for bad-IDIEL strips (1) 2400 Sensors 2898 bad- IDIEL strips (~1.2/Sensor) Extends to 1.2x10 7, but most are much lower

23 Oct 2003Tracker Week - Module Production20 Salvatore Costa - Catania I_DIEL for bad-IDIEL strips (2) 2400 Sensors 2898 bad-IDIEL strips (~1.2/Sensor) 0< I_DIEL <1.2x10 7 nA 1576 (54%) 1  A< I_DIEL ≤1mA

23 Oct 2003Tracker Week - Module Production21 Salvatore Costa - Catania I_DIEL for bad-IDIEL strips (3) 2400 Sensors 2898 bad-IDIEL strips (~1.2/Sensor) 0< I_DIEL <1.2x10 7 nA 1576 (54%) 1  A< I_DIEL ≤1mA 797 ( 27%) 0.1nA< I_DIEL ≤1  A A peak at ~100 nA ?

23 Oct 2003Tracker Week - Module Production22 Salvatore Costa - Catania I_DIEL for bad-IDIEL strips (4) 2400 Sensors 2898 bad-IDIEL strips (~1.2/Sensor) 0< I_DIEL <1.2x10 7 nA –1576 (54%) 1  A< I_DIEL ≤1mA –797 ( 27%) 0.1nA< I_DIEL ≤1  A 476 (16%) have ‘normal’ (=as 85% of good strips) I_DIEL < 0.1nA !!!  Bond or not?

23 Oct 2003Tracker Week - Module Production23 Salvatore Costa - Catania Relative C_AC for Isolated bad-CAC strips (1) 2400 Sensors bad-C_AC strips (~4/Sensor) 3707 Isolated (~1.5/Sensor) Extends from < <2000 but most are much lower C_AC

23 Oct 2003Tracker Week - Module Production24 Salvatore Costa - Catania Relative C_AC for Isolated bad-CAC strips (2) 2400 Sensors 3707 Isolated bad C_AC strips (~1.5/Sensor) < < (96%) -2 < < 2 Some negative values Peaks at ~0 and ~0.6  Bond or not? C_AC C_AC

23 Oct 2003Tracker Week - Module Production25 Salvatore Costa - Catania I_DIEL for Isolated bad-CAC strips (1) 2400 Sensors 3707 Isolated bad C_AC strips (~1.5/Sensor) 1148 (30%) also in bad I_DIEL list I_DIEL Distributions are similar to the whole bad- I_DIEL ones in all scale ranges (as expected)

23 Oct 2003Tracker Week - Module Production26 Salvatore Costa - Catania I_DIEL for Isolated bad-CAC strips (2) 2400 Sensors 3707 Isolated bad C_AC strips (~1.5/Sensor) 1148 (30%) also in bad I_DIEL list I_DIEL Distributions are similar to the whole bad- I_DIEL ones in all scale ranges (as expected)  Picked in bad IDIEL list

23 Oct 2003Tracker Week - Module Production27 Salvatore Costa - Catania I_DIEL for Isolated bad-CAC strips (3) 2400 Sensors 3707 Isolated bad- C_AC strips (~1.5/Sensor) 2561 (70%) not in bad I_DIEL list I_DIEL Distributions are similar to the whole good-I_DIEL ones in all scale ranges

23 Oct 2003Tracker Week - Module Production28 Salvatore Costa - Catania Out of the 2561 not in bad I_DIEL list: 2556 (~100%) 0 < I_DIEL < 1nA 2358 (92%) have ‘normal’ 0 < I_DIEL < 0.1nA Only 193 (8%) have 0.1nA < I_DIEL < 1nA (not shown)  Bond or not? I_DIEL for Isolated bad-CAC strips (4)

23 Oct 2003Tracker Week - Module Production29 Salvatore Costa - Catania Relative C_AC for Chain bad-CAC strips (1) 2400 Sensors bad-C_AC strips (~4/Sensor) 6544 Chain (~2.7/Sensor) Extends from -200< <1000 but most are much lower C_AC

23 Oct 2003Tracker Week - Module Production30 Salvatore Costa - Catania Relative C_AC for Chain bad-CAC strips (2) 2400 Sensors 6544 Isolated bad C_AC strips (~2.7/Sensor) -200< < (99%) -2 < < 8 Expected integers (2,3,4…) Some do, but most have <1 with distrib ~ Isolated:  Our rule that assumed them to be all shorts might be too naïve! C_AC C_AC

23 Oct 2003Tracker Week - Module Production31 Salvatore Costa - Catania Relative C_AC for Chain bad-CAC strips (3) 2400 Sensors 6544 Isolated bad C_AC strips (~2.7/Sensor) -200< <1000  5889 (90%) -2 < < 2  Neighbors, but ‘isolated’?  619 (10%) 2< <8  There is a peak at 2.5  Actually shorted? C_AC C_AC C_AC

23 Oct 2003Tracker Week - Module Production32 Salvatore Costa - Catania Summary & Request for guidance 1.Strips in bad-IDIEL list:  16 % do not seem to have a bad I_DIEL: bond or skip? 2.Isolated strips in bad-CAC list: –They all seem to have bad C_AC (‘relative’ C_AC mostly <1) –30 % are also in bad-IDIEL list –70 % are not in bad-IDIEL list –92% of those not in bad-IDIEL list have indeed good I_DIEL, 8% slightly high I_DIEL, almost none outrageously high I_DIEL –Those tested with LED pinhole search, all pass it  We wonder if we should bond these 3.Chain strips in bad-CAC list: –Only 10% of these seem to actually be shorted (‘relative’ C_AC >1) –Most (90%) behave just like the isolated ones  We wonder if we should bond or skip these or treat them in a more sophisticated way, such as: compute relative C_AC, then  If <some threshold (1?), treat them the same way as the isolated  If >, apply the current rule for shorts i.e. bond only the 1 st in chain In all cases we ask Sensor experts for guidance