Docstoc

ModProd Mtg

Document Sample
ModProd Mtg Powered By Docstoc
					                CMS Week, CERN, 06-10 December 2004



                                   Report from
                    Module Bonding
                 Working Group Meeting
                                 Salvatore Costa
                  Università di Catania and INFN – Sezione di Catania




Salvatore Costa - Catania         CMS Week - Module Production   09 Dec 2004
                                Outline

      1.    Global info on production bonding of the Modules
      2.    Global review of Module bonding quality indicators
      3.    Current open issues
      4.    Selected highlights from individual Center reports




Salvatore Costa - Catania    CMS Week - Module Production   09 Dec 2004   2
                CMS Week, CERN, 06-10 December 2004




                                Global
                  info on production bonding




Salvatore Costa - Catania   CMS Week - Module Production   09 Dec 2004
                            Production Summary

                                                     N. of Modules bonded
                                                    (assembled after 01Dec2003)

                                                    TIB                      1420

                                                    TID                        2

                                                    TOB                      547

                                                    TEC                      921

                                                    Total                    2890


Salvatore Costa - Catania       CMS Week - Module Production   09 Dec 2004          4
                CMS Week, CERN, 06-10 December 2004




                                Global

           review of Module bonding quality




Salvatore Costa - Catania   CMS Week - Module Production   09 Dec 2004
                        # Modules Pull Tested
        Center                     PA TA      PA-Sen        Sen-Sen
        Bari                         103          109             n/a
        Catania                        51          51             n/a
        Firenze                        17            9            n/a
        Padova                         18          99             n/a
        Pisa                           25          57             n/a
        Torino                       164           53             n/a
        Fermilab                     148           72              45
        Santa-Barbara                  62          78              96
        Aachen                         37          41              41
        Hamburg                        69          50             n/a
        Karlsruhe                       0          20             n/a
        Strasbourg                     20          65              65
        Vienna                         76         125             n/a
        Zurich                          2          49             n/a

Salvatore Costa - Catania    CMS Week - Module Production   09 Dec 2004   6
                                                                                          Pull Test Results
                                                                                                    PA T est Areas

                                                16.0




                                                14.0




                                                12.0
Average force (g)Average forces (g) force (g)




                                                10.0



                                                                                                                                                           01Dic-24Oct
                                                 8.0
                                 Average




                                                                                                                                                           25Oct-05Dec

                                                 6.0




                                                 4.0




                                                 2.0




                                                 0.0
                                                          1    2       3   4    5    6    7    8      9   10   11   12   13   14   15   16   17   18



                                                                                          Sam ple of Readout bonds

                                                18.0



                                                16.0



                                                14.0



                                                12.0



                                                10.0
                                                                                                                                                           01Dec-24Oct
                                                 8.0
                                                                                                                                                           25Oct-05Dec


                                                 6.0



                                                 4.0
                                                                                                                                                           5g
                                                 2.0



                                                 0.0
                                                          1   2    3       4    5    6    7    8     9    10   11   12   13   14   15   16   17   18

                                                         BA CT     FI      PD   PI   TO   FL   FL SB SB AA AA HA              KA ST     ST   VI   ZH
                                                                   .                           ss         ss        ss                  ss
                                                       Salvatore Costa - Catania                    CMS Week - Module Production             09 Dec 2004            7
                CMS Week, CERN, 06-10 December 2004




                               Current
                            open issues




Salvatore Costa - Catania   CMS Week - Module Production   09 Dec 2004
                            Tool change intervals
 • Original recommendation in Bonding Spec doc
      – change tool every 40,000 bonds
      – can go up to 100,000 provided bond foot is inspected
        regularly
   can be revised because of improved tool technology
 • Document [in progress], based on info gathered by
   Alan, is posted on bonding web site
     cms.ct.infn.it/bonding  “Tool care & change”
 • 40,000 becomes recommended interval for tool
   cleaning, interval for change becomes tool-
   manufacturer-dependent
Salvatore Costa - Catania        CMS Week - Module Production   09 Dec 2004   9
                Jigs for TEC module bonding
 With squeezed-down time for production, the TEC community is taking steps to gain the ability
 to bond each given type of module in more than one TEC bonding Center. This in order to have
 a backup ready in case of failure or overload at any particular Center. This mainly means
 having duplicate jigs available at each Center. As coordinator of the Bonding WG, I was
 requested to look after the actual execution of the extra jigs construction.
 During the Bonding Meeting we filled (partially, for lack of representatives from 2 Centers) the
 following Table, which summarizes the status of this task. We hope the table can be completed
 by the next Bonding WG Meeting.


                  Module types to     Who made jigs       Backup center for       Who makes
 TEC Center        bond (# Mod)          (# jigs)          these Module          additional jigs
                                                               types                (# jigs)
 Aachen          R6                  Aachen (1)          R3,R5p,R5s           Aachen (2)
 Hamburg         R1p,R1s, R3         Hamburg (2/2/2)     R7                   Hamburg (2)
 Karlsruhe       R5p,R5
 Strasbourg      R7
 Vienna          R2p,R2s             Vienna (1)          Not decided yet      Not decided yet
 Zurich          R4 (1100)           Karl./Zurich (2)    R6                   Karl./Zurich (1+1)

Salvatore Costa - Catania            CMS Week - Module Production          09 Dec 2004              10
                CMS Week, CERN, 06-10 December 2004




                            Selected highlights from


               individual Center Reports




Salvatore Costa - Catania        CMS Week - Module Production   09 Dec 2004
                            TEC centers
 • Aachen: Had some problems reading a few of the recently
   bonded modules. It turned out that the first PA-Sen bias
   bond was too close to the last readout bond, thus shorting to
   it. Corrected by changing program for bias bonds.

 • Vienna: They have bought a new (used) Delvotec 6400 to
   speed up production. It should arrive before Christmas.

 • Zurich: Has bonded and ARCS tested 357 modules in 2004.
   Lately they bonded 9 R6, 12 R4 alignment modules and 2
   R7 hybrids. The first R7 hybrid was bonded with standard
   tool which yielded rather large bond feet. Because of that
   there were 3 shorts. Then they got a smaller tool from Alan.
   With it the bond feet were smaller than the pads and the
   electric test was OK.


Salvatore Costa - Catania    CMS Week - Module Production   09 Dec 2004   12
                             TIB centers
 • Catania: Suffered Hughes machine failure ~2 months ago. For a while
   tried over and over to fix it by ourselves to save money, given the current
   stop in the flow of incoming modules, but could not get machine back to
   normal behavior. So we had to get service from Palomar Technologies (5
   k€), which fixed and tuned mechanical parts, and from an electronic
   technician at the Catania Phys. Dept., who replaced degraded or failed
   electronics components.
 • After this fixing, bonded 13 modules with excellent bond foot quality and
   good pull test results [not yet in DB]: 11-13 g, all First Bond Heel Breaks.
   Still ~30 modules awaiting bonding.

 • Firenze: After fixing their Delvotec (reported at last Meeting) has
   resumed bonding and currently only 5 modules are yet to be bonded.
 • Complained again that the filter capacitor gold bond pad is often difficult
   to bond on due to poor substrate quality. Perhaps we should convey
   this complaint to the Company producing the kapton circuit.




Salvatore Costa - Catania     CMS Week - Module Production   09 Dec 2004          13
                                 TIB centers
 • Pisa: Reported early experience with bonding of the very first TID
   modules: 2 Ring1 Modules:
      – Variable strip pitch requires careful bonder programming
      – Single bonding jig [supplied by Torino] can be used for all Module types [phi,
        stereo right, stereo left] of the same ring by just moving a positioning pin
        [pictures]
      – Experience:
          • Good planarity and vacuum sealing.
          • Good mechanical stability of Module+Carrier+Mask+Bonding Jig
            [pictures] during bonding procedure.
      – 6 TID modules have been built
                                                R1       R2      R3
                                             1 BA     1 BA      1 BA
                                             1 PG     1 PG      1 PG
                            bonded

Salvatore Costa - Catania        CMS Week - Module Production      09 Dec 2004           14
                  [Pictures by A.Profeti, Pisa]
TID R1 Bonding Jig [Torino]              Bonding Jig +Carrier + Adaptable Mask




Adjustable positioning pin               Assembled Module… …on jig




Salvatore Costa - Catania     CMS Week - Module Production    09 Dec 2004        15
                                      TOB centers
 • Santa Barbara:
 1. Hybrid bonding:
      –   28 TOB 6-chip
      –   76 TOB 4-chip
 2. Module bonding:
 • modules bonded:
      –   6 TEC R7
      –   18 TEC R5 stereo (10 of which got every 50th bond pull-tested)
      –   1 TOB 6 chip
      –   1 TOB 4 chip
 •   wrote programs for
      –   TEC R7 modules
      –   TOB 4 chip modules (HPK sensors)
      –   TOB 6 chip modules (HPK sensors)
 •   Encountered problem with using the pattern recognition software on the HPK sensors. In
     the center of the sensor they use the channel number as fiducial, but the numbers on the
     HPK sensors are too small to be picked up by the pattern recognition software of the
     bonder, so they have to align the reference system on the sensors manually, this adds
     about 2 minutes to the bonding time per module. Note: they had asked HPK in fall to add
     fiducial marks to the center of the sensors, but that apparently never happened.




Salvatore Costa - Catania                CMS Week - Module Production      09 Dec 2004          16

				
DOCUMENT INFO
Shared By:
Categories:
Stats:
views:15
posted:3/3/2010
language:English
pages:16