Star-fst-l mailing list

["Ye, Zhenyu" <yezhenyu AT uic.edu>]

Hi Gerard, 

> On Jan 28, 2020, at 7:21 AM, Gerard Visser <gvisser AT indiana.edu> wrote:
> 
> hi Zhenyu,
>       Also - I was really under the impression that the Fermilab wire 
> bonding experts had reviewed at least one of Jianing's designs.

No, they were not asked to review our hybrid design. 

> Was there at that time no mention of a need for a test pad? That is 
> disappointing. I can understand the benerit of having such a test pad - 
> especially if it was so done on IST.

There is certain benefit to have test pads. We can consider adding it to 
production hybrids. 

>       The large pads maybe could be used but we may have to reduce the 
> number of real bond wires put to them in that case.

Let me check if this is the case. 

Zhenyu

> Maybe it is ok, I don't know.
> 
>       Gerard
> 
> 
> On 1/28/2020 3:49 AM, 董家宁 wrote:
>> Hi Zhenyu,
>>   As far as I know, there are no extra pads available for the wire-bonding 
>> pull test on the hybrids.
>>   But the APV footprint for FST is the same as that for IST, and there are 
>> some large bond pads (shown in the attached picture, red circle) on the 
>> hybrids. Maybe they could be used for the wire-bonding pull test?
>> Best,
>> Jianing
>>    -----原始邮件-----
>>    *发件人:*"Ye, Zhenyu" <yezhenyu AT uic.edu>
>>    *发送时间:*2020-01-28 05:34:06 (星期二)
>>    *收件人:* "Ye, Zhenyu" <yezhenyu AT uic.edu>
>>    *抄送:* "star-fst-l AT lists.bnl.gov" <star-fst-l AT lists.bnl.gov>
>>    *主题:* Re: [Star-fst-l] Weekly FST meeting, Jan 27 9am
>>    Minutes
>>    Attendees: Elke, Flemming, Krishan, Mike, Te-Chuan, Xu, Zhenyu
>>    1. Inner signal cables and T-boards - Mike
>>    Expect to receive them middle of next week. Will send them together 
>> with the
>>    other parts requested by Xu for UIC test stand.
>>    Flemming is working on the paperwork for a loan agreement
>>    2. Module Assembly at Fermilab - Zhenyu
>>    Had a meeting with Fermilab engineers and technician last Friday. 
>> Working on
>>    documenting the assembly procedure for FST, based on the documented 
>> assembly
>>    procedure for IST.
>>    Question for Jianing:
>>    1) are there bond-off pads on FST hybrids to do wire-bonding pull tests?
>>    (See page 2 yezhenyu_FST_20200127.pdf )
>>    Question for Yi:
>>    1) how are the wedges fixed to the supporting structure, which holes on 
>> the
>>    mechanical structures will be used?
>>    3. Geometry - Flemming/Te-Chuan
>>    Question for Yi:
>>    1) is the estimated radiation length on FST_agml_01_27_2021.pdf slide 5
>>    reasonable?
>>    2) is the estimated weight per disk on slide 5 reasonable?
>>    If the answers are yes, Flemming will send the new FST AgML model to 
>> Jason.
>>    Zhenyu
>>    > On Jan 24, 2020, at 4:38 PM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>>    >     > Dear all,     >     > We will have the Weekly FST meeting on 
>> Monday, Jan 27, starting at 9am EST (BNL local time).
>>    >     > 
>> https://drupal.star.bnl.gov/STAR/event/2020/01/27/fst-group-meeting
>>    >     > Bluejeans Meeting URL https://bluejeans.com/101020434
>>    > Meeting ID: 101 020 434
>>    >     > Zhenyu
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