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mcmaster:autostain

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Results testing AutoStain machine

Research topics:

  • Effect of light vs no light
  • Optimal staining times
  • Effects on solution changes
  • Effects on removing metals / barriers
  • Effects of over-staining
  • Which chips are harder to stain correctly
  • Effects of HF concentration / etchent (ex whink vs 20% HF)

Baseline Sharp SM4 as these are relatively plentiful and are known to be very easy to stain (ie wide margin of error for experiments)

Images Chip Sample Process Notes
2020-08-12_07-10-39_6102_s1-1-etch-2h_mit2x.jpg

2020-08-12_07-09-09_6102_s1-1-etch-2h_mit20x.jpg
Nintendo 6102
(Sharp SM4)
2020-08-11 S1 Etch RG 2 hour (no changes) TLDR: test was mostly invalidated due to preparation error

Tried to use less grease to hold sample. Resulted in sample flying off during final wash.
I didn't have time to fish it out and it stayed in the drain tube for some hours.
When I fished it out waste acid had etched it, probably resulting in the half eaten ROM
2020-08-12_07-34-50_6102_s1-2-stain-60s_mit2x.jpg

2020-08-12_07-36-07_6102_s1-2-stain-60s_mit20x.jpg
Nintendo 6102
(Sharp SM4)
2020-08-11 S1 Stain 60 sec Overstained, possibly due to error in step 1
mcmaster/autostain.1597218943.txt.gz · Last modified: 2020/08/12 07:55 by mcmaster