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QC selection on disconnected bumps

Currently we are applying 3 QC selections in the pixel failure analysis:

  1. Number of electrically failed pixels must be less than 154
  2. Number of disconnected pixels must be less than 600
  3. Total number of failing pixels (electrically failing or disconnected) must be less than 600.

Regarding 2) - the number of disconnected pixels is counted as the number of pixels failing the disconnected bump scan or source scan, regardless of if they passed all of the electrical tests. This means that pixels with dead digital logic would be categorized as disconnected and counted towards 2). This is also why 1) + 2) != 3) in the table of QC results:

Screenshot_2024-04-01_at_11.32.32_AM

@mmarjano pointed out that the hybridisation specifications are only on the number of disconnected bumps, so we suggest to change 2) to apply this selection only to the number of pixels that fail the disconnected bump (or source) scan, but pass all electrical tests.

I'm not sure if there was an intention behind how we are calculating the selections now - I did present this in the module meeting and can't remember if this point was discussed or not. So if anyone has an objection to changing it please comment.