tracker week, cern, 20-24 oct 2003 23 oct 2003tracker week - module productionsalvatore costa -...
TRANSCRIPT
Tracker Week, CERN, 20-24 Oct 2003
23 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 Production 2 Salvatore Costa - Catania
Summary of recent TIB&TOB prod
23 Oct 2003Tracker Week - Module Production 4 Salvatore Costa - Catania
Module Pull Tests (2)
PA Test Areas
0.00
0.20
0.40
0.60
0.80
1.00
1.20
24 25 26 27 28 30 33 369 1043 1044 1045 1046 1047 1048
Module ID
SD
Firenze To Pd Santa Barbara
PA Test Areas
6.00
7.00
8.00
9.00
10.00
11.00
12.00
24 25 26 27 28 30 33 369 1043 1044 1045 1046 1047
Module ID
min
max
mean
23 Oct 2003Tracker Week - Module Production 5 Salvatore Costa - Catania
Module Pull Tests (3)PA-Sen 50th wire
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
25 26 27 28 30 33 46 47 48 369 363 370 342 341 340 339 1043 1044 1045 1046 1047 1048
Module ID
min
max
mean
Firenze To Pd Santa BarbaraBari Pisa
PA-Sen 50th wire
0.00
0.50
1.00
1.50
2.00
2.50
3.00
25 26 27 28 30 33 46 47 48 369 363 370 342 341 340 339 1043 1044 1045 1046 1047 1048
Module ID
SD
23 Oct 2003Tracker Week - Module Production 6 Salvatore Costa - Catania
Module Pull Tests (4)Sen-Sen 50th wire
6.00
7.00
8.00
9.00
10.00
11.00
12.00
1043 1044 1045 1046 1047 1048
Module ID
m in
max
mean
Santa Barbara
Sen-Sen 50th wire
0.00
0.10
0.20
0.30
0.40
0.50
0.60
1043 1044 1045 1046 1047 1048
Module ID
SD
23 Oct 2003Tracker Week - Module Production 7 Salvatore Costa - Catania
Highlights from Center ReportsAACHEN 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 WeekCERN “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 Production 8 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 frameZURICH Received 4 Modules which all failed test after ground bonding
23 Oct 2003Tracker Week - Module Production 9 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, 20-24 Oct 2003
23 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 Production 11 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: 3 34 35 36 37 skip isolated 3, skip all but lowest in 34-37 chain, or: bond only 34
23 Oct 2003Tracker Week - Module Production 12 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 Production 13 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 Production 15 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 10251 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:
1. 1146 (30%) are also flagged as bad-I_IDIEL2. 2561 (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 list5. IDIEL for isolated bad-C_AC strips which are not in bad-I_DIEL list
23 Oct 2003Tracker Week - Module Production 16 Salvatore Costa - Catania
I_DIEL for good strips (1)
• Plotted for 869,158 strips
(approx 1700 Sensors)• Extends to ~1A
but peaks near 0 as expected
23 Oct 2003Tracker Week - Module Production 17 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 Production 18 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 Production 19 Salvatore Costa - Catania
I_DIEL for bad-IDIEL strips (1)
• 2400 Sensors• 2898 bad-
IDIEL strips• (~1.2/Sensor)• Extends to
1.2x107, but most are much lower
23 Oct 2003Tracker Week - Module Production 20 Salvatore Costa - Catania
I_DIEL for bad-IDIEL strips (2)
• 2400 Sensors• 2898 bad-IDIEL
strips• (~1.2/Sensor)• 0<I_DIEL<1.2x107nA• 1576 (54%)
1A<I_DIEL≤1mA
23 Oct 2003Tracker Week - Module Production 21 Salvatore Costa - Catania
I_DIEL for bad-IDIEL strips (3)
• 2400 Sensors• 2898 bad-IDIEL strips• (~1.2/Sensor)• 0<I_DIEL<1.2x107nA• 1576 (54%)
1A<I_DIEL≤1mA• 797 ( 27%)
0.1nA<I_DIEL≤1A• A peak at ~100 nA
?
23 Oct 2003Tracker Week - Module Production 22 Salvatore Costa - Catania
I_DIEL for bad-IDIEL strips (4)
• 2400 Sensors• 2898 bad-IDIEL strips• (~1.2/Sensor)• 0<I_DIEL<1.2x107nA
– 1576 (54%)
1A<I_DIEL≤1mA– 797 ( 27%)
0.1nA<I_DIEL≤1A
• 476 (16%) have ‘normal’
(=as 85% of good strips) I_DIEL < 0.1nA !!!
Bond or not?
23 Oct 2003Tracker Week - Module Production 23 Salvatore Costa - Catania
Relative C_AC for Isolated bad-CAC strips (1)
• 2400 Sensors• 10251 bad-C_AC strips• (~4/Sensor)• 3707 Isolated• (~1.5/Sensor)• Extends from
-10000< <2000
but most are much lower
C_AC
<C_AC>
23 Oct 2003Tracker Week - Module Production 24 Salvatore Costa - Catania
Relative C_AC for Isolated bad-CAC strips (2)
• 2400 Sensors• 3707 Isolated bad C_AC
strips• (~1.5/Sensor)
-10000< <2000
• 3566 (96%)
-2 < < 2
• Some negative values• Peaks at ~0 and ~0.6
Bond or not?
C_AC
<C_AC>
C_AC
<C_AC>
23 Oct 2003Tracker Week - Module Production 25 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 Production 26 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 Production 27 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 Production 28 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 Production 29 Salvatore Costa - Catania
Relative C_AC for Chain bad-CAC strips (1)
• 2400 Sensors• 10251 bad-C_AC strips• (~4/Sensor)• 6544 Chain• (~2.7/Sensor)• Extends from
-200< <1000
but most are much lower
C_AC
<C_AC>
23 Oct 2003Tracker Week - Module Production 30 Salvatore Costa - Catania
Relative C_AC for Chain bad-CAC strips (2)
• 2400 Sensors• 6544 Isolated bad C_AC
strips• (~2.7/Sensor)• -200< <1000
• 6508 (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>
C_AC
<C_AC>
23 Oct 2003Tracker Week - Module Production 31 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
<C_AC>
C_AC
<C_AC>
23 Oct 2003Tracker Week - Module Production 32 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 these3. 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 1st in chain
In all cases we ask Sensor experts for guidance