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[董家宁 <jndong AT sdu.edu.cn>]

Dear Zhenyu,

  Slide 2: 
  166.7 mm (not so accurate) is actually the Distance from the origin to the 
edge of APV25 footprint, which is measured manually. The bright yellow arc 
with radius of 166.7 mm is placed as a reference. 
  In addition, it seems that the APV25 pads are very close to the footprint 
edge. The distance I just measured manually is roughly estimated at 0.6 mm. 
And these values have been updated in the document.

  Slide 3:
  The positions of the chips correspond to the center of their footprint (the 
same footprint used in IST). I think it's also the center of APV25 chip 
(Maybe not, I'm not sure about that).

  P.s. The APV25 chip assembled on hybrid in IST and its footprint are shown 
in the attachment, which maybe helpful for easier understanding.

Best,
Jianing


> -----原始邮件-----
> 发件人: "Zhenyu Ye" <yezhenyu2003 AT gmail.com>
> 发送时间: 2019-05-25 00:35:47 (星期六)
> 收件人: "董家宁" <jndong AT sdu.edu.cn>
> 抄送: star-fst-l AT lists.bnl.gov
> 主题: Re: [Star-fst-l] Dimensions of the new hybrids and T-board
> 
> Dear Jianing,
> 
> Slide 2 How do you get the number 166.7 mm for the Distance from the origin 
> to APV25 pads?
> 
> Slide 3 What the positions of the APV chips (e.g. X: 33.4 mm, Y: 167.6 mm) 
> in your slides correspond to? Are they the center of the chips?
> 
> Best,
> Zhenyu
> 
> > On May 24, 2019, at 7:39 AM, 董家宁 <jndong AT sdu.edu.cn> wrote:
> > 
> > Dear All,
> > 
> >     The document of dimensions and CAD files for the new hybrids and 
> > T-board have been uploaded to the WIKI 
> > (https://wiki.bnl.gov/star/index.php/Hybrid_and_T-board), and they can 
> > also be found in the following link: 
> > https://drupal.star.bnl.gov/STAR/blog/jndong/document-dimensions-and-cad-files-new-hybrids-and-t-board
> >  .
> > 
> >     Please help me to double-check the dimensions and locations of APV25 
> > chips and other critical components.
> > 
> >     If you need additional information, please let me know.
> > 
> >     Thanks!
> > 
> > 
> > 
> > Best,
> > 
> > Jianing
> > 
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> > Star-fst-l AT lists.bnl.gov
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Attachment: APV25-chip_and_footprint.pdf
Description: Adobe PDF document