| ID |
Date |
Author |
Category |
Subject |
|
63
|
Tue Feb 4 19:51:10 2020 |
Dinko Ferencek | Module assembly | Cap gluing |
| Today protective caps have been glued to modules 1545, 1547, 1548, 1549, and 1550. |
|
65
|
Wed Feb 5 16:07:03 2020 |
Dinko Ferencek | Module assembly | Module assembly spreadsheet migrated to Google Sheets |
Excel file stored on CERNBox containing the module assembly spreadsheet has been replaced with a Google Sheet https://docs.google.com/spreadsheets/d/12m2ESCLPH5AyWuuYV4KV1c5O_NEy7uP5PQKzVsdr3wQ/edit?usp=sharing. This change should make common editing of the spreadsheet easier.
The new spreadsheet has also been linked from the main L1 replacement web page http://cms.web.psi.ch/L1Replacement/ |
|
68
|
Thu Feb 6 17:09:50 2020 |
Dinko Ferencek | Module assembly | Gluing stamp improvements |
| Silvan has made additional grooves on the gluing stamp which now sits stably on top of the module without any rocking motion and also allows better glue distribution to all the HDI components that are supposed to receive the glue. |
|
75
|
Sun Feb 9 12:05:47 2020 |
Dinko Ferencek | Module assembly | Cap gluing |
| Today protective caps have been glued to modules 1561 and 1562. |
|
85
|
Fri Feb 14 14:05:16 2020 |
Dinko Ferencek | Module assembly | Production yield so far |
Of 41 modules produced and tested so far (1536-1576), 6 modules were found to be bad before or during the reception test, 5 were graded C after the full qualification (one of which is possibly C*) and the remaining 30 modules were graded B (of which 4 were manually regraded from C to B).
The overall yield for good modules (A+B/Total) produced so far is (30/41)=73% |
|
87
|
Mon Feb 24 13:53:32 2020 |
Urs Langenegger | Module assembly | Setup changes in week 8 |
Setup changes in week 8
Silvan considered the single-module gluing approach suboptimal. It was changed:
- we switched sides, the cap gluing is now done on the window-side of the aisle
- there are now two jigs set up for cap gluing
The procedure itself for gluing did not change: Apply the stamp with the glue to module 1, release, put module 1 into its jig, insert module 2 into gluing jig, apply stamp (because of the glue fluidity, the marks from module 1 will have disappeared and there is no need to re-apply any glue to the stamp). The caps are lowered onto the modules only once the glue has been applied to both modules.
Silvan recommended applying the weight of only one copper(?) bar, to be placed centered on the top of the z-stage.
Silvan also recommended against using ethanol. Instead we are supposed to use aceton. As a result, the plastic tweezers should not be used anymore, but rather metallic tweezers.
Finally, Silvan changed the Peltiers, and applied isolation inside Red October. We observed cooling times from 10C to -20C of 6 minutes. |
|
88
|
Mon Feb 24 14:01:29 2020 |
Urs Langenegger | Module assembly | Cap gluing in W8 |
In week 8 the following modules were glued and tested:
M1581
M1582
M1583
M1584
M1585
M1586
M1587
M1588
M1589
M1591
M1590 was not glued last week because it had one HV bond broken (Silvan fixed this on Monday, 20/02/24).
M1586 initially had problems with the readout after gluing, but this was fixed by porperly closing the MOLEX connector. In the reception test, M1586 was graded 'B'.
All other modules were graded 'A' in the reception test.
Overall the double-gluing setup works very well. The modules above were glued basically in one day. |
|
89
|
Tue Feb 25 17:11:18 2020 |
Urs Langenegger | Module assembly | Modules glued and tested Feb 24/25 |
Modules glued and tested Feb 24/25
The letters after the module name indicate the reception test grade.
M1590 A (after Silvan fixed broken HV bond)
M1592 A
M1595 B
M1596 A
M1597 A
M1599 C (leakage current: 16uA)
M1600 A
M1598 had a broken clock wire bond, was diagnosed by Wolfram and fixed by Silvan. Will be processed together with the other modules that had problems after taking them out of the storage box (M1593 and M1594), in case they can be fixed. |
|
110
|
Mon Mar 16 15:17:18 2020 |
Matej Roguljic | Module assembly | M1601 and M1602 |
| Andrey and I assembled modules 1601 and 1602 on Friday, 13.3. On Monday, 16.3. I ran reception on them (both graded A) and then glued protection caps on them. |
|
114
|
Wed Mar 18 17:43:41 2020 |
Andrey Starodumov | Module assembly | M1605-M1608 |
M1605 and M1606: reception done on Mar 17
M1607 and M1608: reception done today
All: grade A
Caps glued to M1605-M1608 |
|
98
|
Mon Mar 9 16:16:48 2020 |
Andrey Starodumov | HDI test | HDIs: 3001, 3002, 3003, 3004 and 4033 |
Today I tested 5 HDIs: 3001, 3002, 3003, 3004 and 4033
Results:
3001
- electrically OK
- HV OK
- I heard 10+ sparks during 60sec
--> HDI did not pass tests
Danek took it for HV test at his setup
3002-3004, 4033
- all showed different patterns of electrical test failures in Quadrant 0 and 3 (Q0, Q3)
- either all 3 (clock, CTR, SDA) tests fails on Q0 and/or Q3 or some of them or only Ch1 (out of two channels) fails.
--> HDIs did not pass tests
Since patterns were similar the reason could be miss-alignment of contacts. Under microscope in some cases one could see marks outside contact pads.
Conclusion:
we have to re-align the pin head of the jig with respect to HDI and repeat tests of HDIs: 3002-3004 and 4033. |
|
101
|
Wed Mar 11 17:12:05 2020 |
Matej Roguljic | HDI test | HDI testing procedure change |
There is an additional test that will be used from 11.03. on all HDIs. It involves measuring the voltage between ground and the HV pin of the needle card with the goal of checking whether proper voltage is delivered to the HDI. The HDI testing script has been updated and it now prompts the user to set the voltage to -800 V, measure the voltage on the pin and write this into the test results. After this, another instruction has been added which tells the user to raise the Z-stage (needle card) before setting voltage to -1100 V. This is done to prevent sparking from the HV pad to the HV pin if the alignment is slightly off.
While measuring the voltage on the HV pin, one should keep in mind the proper settings on the Keithley. When the voltmeter probe is connected to the pin, the current reading on Keithley will go up and if the current readout range is low, it will limit the voltage even before hitting compliance. This was observed during the initial testing of the new procedure. Range should be set to maximum (100 muA) and compliance should be set to 105 muA. This is high enough that it is not reached while measuring voltage at -800 V. |
|
102
|
Wed Mar 11 17:22:57 2020 |
Matej Roguljic | HDI test | 8 HDI tests on 11.3. |
I tested 8 HDIs today: 5029,5030,5031,6034,6036,6035,1031 and 1032
All of them tested fine. |
|
104
|
Thu Mar 12 12:19:43 2020 |
Matej Roguljic | HDI test | 5 HDI tests on 12.3. |
| I tested 5 HDIs on 12.3. 1030,1029,1040,1039 and 1038. 1039 failed all the electrical tests. All the others passed the tests. HDI 1038 has one wirebond which is connected to the pad on the HDI and then it extends back up (like this: TBM./\.HDI/). The connection is good, but I just want to check with Silvan later if this is a problem. |
|
121
|
Fri Mar 20 18:09:47 2020 |
Andrey Starodumov | HDI test | 3 HDIs tested |
5008 failed, but most likely die to the pin head mis-alignment. Test to be repeated.
5007 and 5008: passed tests but during HV measurements (-800V) with a multymeter I heard high frequency noise and instead of -800V measure either -100V or -500V but the voltage jumped significantly. This effect is to be understood.
For the moment these HDIs will not be used in production. |
|
126
|
Tue Mar 24 15:16:56 2020 |
Andrey Starodumov | HDI test | 8 HDIs tested on Mar 23 |
1014, 1016, 2001, 2003,
2004, 4013, 4015, 5014
All are good. |
|
138
|
Wed Mar 25 18:30:23 2020 |
Andrey Starodumov | HDI test | 4+2 HDI tested |
2 suspicious HDIs retested and found OK: 5006/5007
5013, 5016, 3017, 3019 are OK. |
|
145
|
Thu Mar 26 17:43:06 2020 |
Andrey Starodumov | HDI test | 6+1 HDI tested |
HDIs: 6021, 3014, 2005, 2009, 2006 and 2010 are OK
HDI 6024 failed: SDA0 and SDA2 on Ch1 missing
Looks like lower than 800V measured effect relates to the cable.
After cable has been changed all measurements 790V |
|
149
|
Fri Mar 27 14:32:11 2020 |
Andrey Starodumov | HDI test | List of suspicious HDIs |
Here are HDIs that the first time tested showed 500-600V measured on the pin or directly on the HDI pad instead of 800V:
5006, 5007, 2005
3014, 3017, 3019, 6021
I put them in the box called "For Wolfram ...." on the Wolfram's desk in the lab.
Nevertheless, I think this is an artificial issue that mmight be caused by a cable. I retested 5006, 5007 and 2005 with a new
cable and in all cases measured HV=790V what is normal. |
|
159
|
Mon Mar 30 17:40:35 2020 |
Andrey Starodumov | HDI test | 3+2 HDIs (re-)tested |
For 3 HDIs: 3014, 3017, 6021, HV has been re-measured. In all cases 790V is measured with 800V supplied.
2 HDIs: 1026, 5022 were tested. Both OK.
All 5 HDIs will be used in module assembly. |