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Main Web>DetectorRD>GridPix>SiRNLayer (2012-04-05, NielsVanBakel) (raw view)

| <p>Martin Fransen (26-3-2012): _I investigated a few chips from the second batch from IZM that broke down due to sparks. The photo 'damaged-grid' shows the damage in a grid due to sparks, the photo 'spots-on-SiRN' shows the protection layer beneath it. The photo 'craters' speaks for itself, it is a close up of the spots._ </p> <p> _I broke a chip into pieces to examine the cross section. The picture '3views' shows how the chip broke, the fact that the <a rel="nofollow" href="https://wiki.nikhef.nl/twiki/bin/edit/Main/SiRN?topicparent=Main.GridPix;nowysiwyg=0" title="SiRN (this topic does not yet exist; you can create it)">SiRN</a> follows the structure is a sign that those 'lines' are the weak spots. One can see in the cross sections that there are pinholes, which can best be distinguished in 'slice2'._ </p> <p> _According to my opinion most of these chips will unavoidably fail when used with an Ingrid. The growth of this layer should be controlled better. Later this week I will perform the same examination on a chip that has proven to withstand many discharges to see if there is a major difference. I will let you know the results._ </p> | <img width="570" alt="" src="%ATTACHURL%/damaged-grid.JPG" height="428" /><img width="570" alt="" src="%ATTACHURL%/spots-on-SiRN.JPG" height="428" /><img width="570" alt="" src="%ATTACHURL%/craters.JPG" height="428" /><img width="570" alt="" src="%ATTACHURL%/3views.JPG" height="428" /> |
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-- Main.NielsVanBakel - 2012-04-05

Attachments

Topic attachments
I	Attachment	Action	Size	Date	Who
JPG	3views.JPG	manage	387.4 K	2012-04-05 - 08:44	NielsVanBakel
JPG	craters.JPG	manage	841.1 K	2012-04-05 - 08:59	NielsVanBakel
JPG	damaged-grid.JPG	manage	789.1 K	2012-04-05 - 09:00	NielsVanBakel
JPG	spots-on-SiRN.JPG	manage	831.7 K	2012-04-05 - 09:00	NielsVanBakel

Topic revision: r1 - 2012-04-05 - NielsVanBakel

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